SpringMVC是一种基于Java的Web框架,它是Spring框架的一部分。SpringMVC通过使用MVC(Model-View-Controller)设计模式来组织和管理Web应用程序的开发。
在SpringMVC中,Model代表数据模型,View代表用户界面,Controller负责处理用户请求并协调Model和View之间的交互。这种分层架构使得代码更加清晰、可维护和可扩展。
一、项目创建
创建一个Maven项目,项目名称为 : CloudJunzySSM
可以根据我的项目结构进行创建包,配置,接口,类(当然也可以根据自己的习惯创建)
如果不知如何创建,可以关注本人的博客 : IDEA开发工具的安装及使用
二、相关依赖
将所有的引用依赖导入项目中,以下是所有依赖配置
XML
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>CloudJunzySSM</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>CloudJunzySSM Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>5.1.44</mysql.version>
<!--pagehelper分页jar依赖-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<slf4j.version>1.7.13</slf4j.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
<mybatis.ehcache.version>1.1.0</mybatis.ehcache.version>
<ehcache.version>2.10.0</ehcache.version>
<redis.version>2.9.0</redis.version>
<redis.spring.version>1.7.1.RELEASE</redis.spring.version>
<jackson.version>2.9.3</jackson.version>
<jstl.version>1.2</jstl.version>
<standard.version>1.1.2</standard.version>
<tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version>
<commons-fileupload.version>1.3.3</commons-fileupload.version>
<hibernate-validator.version>5.0.2.Final</hibernate-validator.version>
<shiro.version>1.3.2</shiro.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--pagehelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!--mybatis与ehcache整合-->
<dependency>
<groupId>org.mybatis.caches</groupId>
<artifactId>mybatis-ehcache</artifactId>
<version>${mybatis.ehcache.version}</version>
</dependency>
<!--ehcache依赖-->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>${ehcache.version}</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>${redis.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>${redis.spring.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
<exclusions>
<exclusion>
<artifactId>commons-pool2</artifactId>
<groupId>org.apache.commons</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--springmvc依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!-- log4j2日志相关依赖 -->
<!-- log配置:Log4j2 + Slf4j -->
<!-- slf4j核心包-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--用于与slf4j保持桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web,非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
<scope>runtime</scope>
</dependency>
<!--需要使用log4j2的AsyncLogger需要包含disruptor-->
<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>${log4j2.disruptor.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>${standard.version}</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jsp-api</artifactId>
<version>${tomcat-jsp-api.version}</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate-validator.version}</version>
</dependency>
<!--shiro依赖-->
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-core</artifactId>
<version>${shiro.version}</version>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-web</artifactId>
<version>${shiro.version}</version>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-spring</artifactId>
<version>${shiro.version}</version>
</dependency>
</dependencies>
<build>
<finalName>CloudJunzySSM</finalName>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.properties</include>
<include>*.xml</include>
</includes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</build>
</project>
其中的项目名称需要根据自己的项目名称进行修改
三、配置文件
将项目中的web.xml配置文件修改为3.1并且增加配置
XML<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <display-name>Archetype Created Web Application</display-name> <!-- Spring和web项目集成start --> <!-- spring上下文配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context.xml</param-value> </context-param> <!-- 读取Spring上下文的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- Spring和web项目集成end --> <!-- 中文乱码处理 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring MVC servlet --> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--此参数可以不配置,默认值为:/WEB-INF/springmvc-servlet.xml--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <!--web.xml 3.0的新特性,是否支持异步--> <async-supported>true</async-supported> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
以上代码会有部分报出编译错误,无需担心,只要把以下所有配置文件配置完成即可
3.1 generatorConfig.xml
XML<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" > <generatorConfiguration> <!-- 引入配置文件 --> <properties resource="jdbc.properties"/> <!--指定数据库jdbc驱动jar包的位置--> <classPathEntry location="D:\\temp\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/> <!-- 一个数据库一个context --> <context id="infoGuardian"> <!-- 注释 --> <commentGenerator> <property name="suppressAllComments" value="true"/><!-- 是否取消注释 --> <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 --> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/> <!-- 类型转换 --> <javaTypeResolver> <!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) --> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 01 指定javaBean生成的位置 --> <!-- targetPackage:指定生成的model生成所在的包名 --> <!-- targetProject:指定在该项目下所在的路径 --> <javaModelGenerator targetPackage="com.CloudJun.model" targetProject="src/main/java"> <!-- 是否允许子包,即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> <!-- 是否对model添加构造函数 --> <property name="constructorBased" value="true"/> <!-- 是否针对string类型的字段在set的时候进行trim调用 --> <property name="trimStrings" value="false"/> <!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法,只有构造方法 --> <property name="immutable" value="false"/> </javaModelGenerator> <!-- 02 指定sql映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.CloudJun.mapper" targetProject="src/main/java"> <!-- 是否允许子包,即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> </sqlMapGenerator> <!-- 03 生成XxxMapper接口 --> <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 --> <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 --> <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 --> <javaClientGenerator targetPackage="com.CloudJun.mapper" targetProject="src/main/java" type="XMLMAPPER"> <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] --> <property name="enableSubPackages" value="false"/> </javaClientGenerator> <!-- 配置表信息 --> <!-- schema即为数据库名 --> <!-- tableName为对应的数据库表 --> <!-- domainObjectName是要生成的实体类 --> <!-- enable*ByExample是否生成 example类 --> <!--<table schema="" tableName="t_book" domainObjectName="Book"--> <!--enableCountByExample="false" enableDeleteByExample="false"--> <!--enableSelectByExample="false" enableUpdateByExample="false">--> <!--<!– 忽略列,不生成bean 字段 –>--> <!--<!– <ignoreColumn column="FRED" /> –>--> <!--<!– 指定列的java数据类型 –>--> <!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>--> <!--</table>--> <table schema="" tableName="t_hotel" domainObjectName="Hotel" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"> </table> </context> </generatorConfiguration>
其中
<table schema="" tableName="t_hotel" domainObjectName="Hotel"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
</table>
tableName="t_hotel"中的t_hotel是数据库的表名称,
domainObjectName="Hotel"中的Hotel是需要自动生成的实体名称。
3.2 jdbc.properties
XMLjdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8 jdbc.username=root jdbc.password=123456
3.3 log4j2.xml
XML<?xml version="1.0" encoding="UTF-8"?> <!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR < FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间,单位是s,最小是5s. --> <Configuration status="WARN" monitorInterval="30"> <Properties> <!-- 配置日志文件输出目录 ${sys:user.home} --> <Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property> <property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property> <property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property> <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property> </Properties> <Appenders> <!--这个输出控制台的配置 --> <Console name="Console" target="SYSTEM_OUT"> <!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) --> <ThresholdFilter level="trace" onMatch="ACCEPT" onMismatch="DENY" /> <!-- 输出日志的格式 --> <!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称 %m : 日志内容,即 logger.info("message") %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M : 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 --> <PatternLayout pattern="${PATTERN}" /> </Console> <!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用 --> <!--append为TRUE表示消息增加到指定文件中,false表示消息覆盖指定的文件内容,默认值是true --> <File name="log" fileName="logs/test.log" append="false"> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /> </File> <!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size, 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档 --> <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log" filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log"> <!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) --> <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY" /> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /> <Policies> <!-- 基于时间的滚动策略,interval属性用来指定多久滚动一次,默认是1 hour。 modulate=true用来调整时间:比如现在是早上3am,interval是4,那么第一次滚动是在4am,接着是8am,12am...而不是7am. --> <!-- 关键点在于 filePattern后的日期格式,以及TimeBasedTriggeringPolicy的interval, 日期格式精确到哪一位,interval也精确到哪一个单位 --> <!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log --> <TimeBasedTriggeringPolicy interval="1" modulate="true" /> <!-- SizeBasedTriggeringPolicy:Policies子节点, 基于指定文件大小的滚动策略,size属性用来定义每个日志文件的大小. --> <!-- <SizeBasedTriggeringPolicy size="2 kB" /> --> </Policies> </RollingFile> <RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log" filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log"> <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY" /> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /> <Policies> <TimeBasedTriggeringPolicy /> <SizeBasedTriggeringPolicy size="2 kB" /> </Policies> <!-- DefaultRolloverStrategy属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 --> <DefaultRolloverStrategy max="20" /> </RollingFile> <RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log" filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log"> <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY" /> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /> <Policies> <!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log --> <TimeBasedTriggeringPolicy interval="1" modulate="true" /> <!-- <SizeBasedTriggeringPolicy size="10 MB" /> --> </Policies> </RollingFile> </Appenders> <!--然后定义logger,只有定义了logger并引入的appender,appender才会生效 --> <Loggers> <!--过滤掉spring和mybatis的一些无用的DEBUG信息 --> <logger name="org.springframework" level="INFO"></logger> <logger name="org.mybatis" level="INFO"></logger> <!-- 第三方日志系统 --> <logger name="org.springframework" level="ERROR" /> <logger name="org.hibernate" level="ERROR" /> <logger name="org.apache.struts2" level="ERROR" /> <logger name="com.opensymphony.xwork2" level="ERROR" /> <logger name="org.jboss" level="ERROR" /> <!-- 配置日志的根节点 --> <root level="all"> <appender-ref ref="Console" /> <appender-ref ref="RollingFileInfo" /> <appender-ref ref="RollingFileWarn" /> <appender-ref ref="RollingFileError" /> </root> </Loggers> </Configuration>
3.4 spring-context.xml
XML<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- spring框架和mybatis进行整合的配置文件加载到spring的上下文中--> <import resource="classpath:spring-mybatis.xml"></import> </beans>
3.5 spring-mybatis.xml
XML<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--1. 注解式开发 --> <!-- 注解驱动 --> <context:annotation-config/> <!-- 用注解方式注入bean,并指定查找范围:com.CloudJun及子子孙孙包--> <context:component-scan base-package="com.CloudJun"/> <context:property-placeholder location="classpath:jdbc.properties"/> <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!--初始连接数--> <property name="initialSize" value="10"/> <!--最大活动连接数--> <property name="maxTotal" value="100"/> <!--最大空闲连接数--> <property name="maxIdle" value="50"/> <!--最小空闲连接数--> <property name="minIdle" value="10"/> <!--设置为-1时,如果没有可用连接,连接池会一直无限期等待,直到获取到连接为止。--> <!--如果设置为N(毫秒),则连接池会等待N毫秒,等待不到,则抛出异常--> <property name="maxWaitMillis" value="-1"/> </bean> <!--4. spring和MyBatis整合 --> <!--1) 创建sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 指定数据源 --> <property name="dataSource" ref="dataSource"/> <!-- 自动扫描XxxMapping.xml文件,**是任意路径 --> <property name="mapperLocations" value="classpath*:com/CloudJun/**/mapper/*.xml"/> <!-- 指定别名 --> <property name="typeAliasesPackage" value="com/CloudJun/**/model"/> <!--配置pagehelper插件--> <property name="plugins"> <array> <bean class="com.github.pagehelper.PageInterceptor"> <property name="properties"> <value> helperDialect=mysql </value> </property> </bean> </array> </property> </bean> <!--2) 自动扫描com/CloudJun/**/mapper下的所有XxxMapper接口(其实就是DAO接口),并实现这些接口,--> <!-- 即可直接在程序中使用dao接口,不用再获取sqlsession对象--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--basePackage 属性是映射器接口文件的包路径。--> <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径--> <property name="basePackage" value="com/CloudJun/**/mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <aop:aspectj-autoproxy/> </beans>
3.6 spring-mvc.xml
XML<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd"> <!--1) 扫描com.CloudJun及子子孙孙包下的控制器(扫描范围过大,耗时)--> <context:component-scan base-package="com.CloudJun"/> <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter --> <mvc:annotation-driven /> <!--3) 创建ViewResolver视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- viewClass需要在pom中引入两个包:standard.jar and jstl.jar --> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <!--4) 单独处理图片、样式、js等资源 --> <!-- <mvc:resources location="/css/" mapping="/css/**"/> <mvc:resources location="/js/" mapping="/js/**"/> <mvc:resources location="WEB-INF/images/" mapping="/images/**"/>--> <!-- 处理static包里的所有静态资源 --> <mvc:resources location="/static/" mapping="/static/**"/> <!--处理controller层发送请求到biz层,会经过切面拦截处理--> <aop:aspectj-autoproxy/> </beans>
其中有些会报编译错误,需要将后端代码完成即可
创建名为CloudJun.tld (自定义分页并且配置)的配置文件
XML
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>CloudJun 1.1 core library</description>
<display-name>CloudJun core</display-name>
<tlib-version>1.1</tlib-version>
<short-name>CloudJun</short-name>
<uri>http://jsp.veryedu.cn</uri>
<tag>
<name>page</name>
<tag-class>com.CloudJun.tag.PageTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>pageBean</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
四、后端代码
配置完成,在右侧的maven中找到相应的配置文件进行自动生成接口及实体和配置文件
不知道的可以根据我博客中的进行学习 : mybatis入门的环境搭建
PagerAspect 创建切面类
javapackage com.CloudJun.aspect; import com.CloudJun.utils.PageBean; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; import java.util.List; /** * @author CloudJun * @create 2023-08-25 16:26 */ @Component @Aspect public class PagerAspect { /** * *..*Service.*Pager(..) * * : 任何返回值 * *.. : 任何包,不限层级 * *biz : 以Biz结尾的类或者接口 * *Pager : 以Pager结尾的方法 * (..) : 方法里有任意参数 * 符合上述条件,即为目标类或者方法 */ @Around("execution(* *..*biz.*Page(..))") public Object invoke(ProceedingJoinPoint args) throws Throwable { Object[] params = args.getArgs(); PageBean pageBean = null; for (Object param : params) { if(param instanceof PageBean){ pageBean = (PageBean)param; break; } } if(pageBean != null && pageBean.isPagination()) PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); Object list = args.proceed(params); if(null != pageBean && pageBean.isPagination()){ PageInfo pageInfo = new PageInfo((List) list); pageBean.setTotal(pageInfo.getTotal()+""); } return list; } }
在自动生成的配置文件 HotelMapper.xml中增加以下代码
XML
<select id="selectHotelPage" resultType="com.CloudJun.model.Hotel" parameterType="com.CloudJun.model.Hotel" >
select * from t_hotel
<where>
<if test="hname != null">
and hname like concat('%',#{hname},'%')
</if>
</where>
</select>
在自动生成的接口 HotelMapper中增加以下代码
javaList<Hotel> selectHotelPage(Hotel hotel);
在自动生成的实体类中重写ToString方法
在创建一个接口 Hotelbiz
java
package com.CloudJun.biz;
import com.CloudJun.model.Hotel;
import com.CloudJun.utils.PageBean;
import java.util.List;
public interface Hotelbiz {
int deleteByPrimaryKey(Long hid);
int insert(Hotel record);
int insertSelective(Hotel record);
Hotel selectByPrimaryKey(Long hid);
int updateByPrimaryKeySelective(Hotel record);
int updateByPrimaryKey(Hotel record);
List<Hotel> selectHotelPage(Hotel clazz, PageBean pageBean);
}
自己在项目中共创建一个接口实现类 HotelbizImpl
java
package com.CloudJun.biz.impl;
import com.CloudJun.biz.Hotelbiz;
import com.CloudJun.mapper.HotelMapper;
import com.CloudJun.model.Hotel;
import com.CloudJun.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author CloudJun
* @create 2023-09-07 14:22
*/
@Service
public class HotelbizImpl implements Hotelbiz {
@Autowired
private HotelMapper hotelMapper;
@Override
public int deleteByPrimaryKey(Long hid) {
return hotelMapper.deleteByPrimaryKey(hid);
}
@Override
public int insert(Hotel record) {
return hotelMapper.insert(record);
}
@Override
public int insertSelective(Hotel record) {
return hotelMapper.insert(record);
}
@Override
public Hotel selectByPrimaryKey(Long hid) {
return hotelMapper.selectByPrimaryKey(hid);
}
@Override
public int updateByPrimaryKeySelective(Hotel record) {
return hotelMapper.updateByPrimaryKeySelective(record);
}
@Override
public int updateByPrimaryKey(Hotel record) {
return hotelMapper.updateByPrimaryKey(record);
}
@Override
public List<Hotel> selectHotelPage(Hotel hotel, PageBean pageBean) {
return hotelMapper.selectHotelPage(hotel);
}
}
PageBean创建一个分页工具类
javapackage com.CloudJun.utils; import javax.servlet.http.HttpServletRequest; import java.io.Serializable; import java.util.Map; public class PageBean implements Serializable { private static final long serialVersionUID = 2422581023658455731L; //页码 private int page=1; //每页显示记录数 private int rows=10; //总记录数 private int total=0; //是否分页 private boolean isPagination=true; //上一次的请求路径 private String url; //获取所有的请求参数 private Map<String,String[]> map; public PageBean() { super(); } //设置请求参数 public void setRequest(HttpServletRequest req) { String page=req.getParameter("page"); String rows=req.getParameter("rows"); String pagination=req.getParameter("pagination"); this.setPage(page); this.setRows(rows); this.setPagination(pagination); this.url=req.getContextPath()+req.getServletPath(); this.map=req.getParameterMap(); } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public Map<String, String[]> getMap() { return map; } public void setMap(Map<String, String[]> map) { this.map = map; } public int getPage() { return page; } public void setPage(int page) { this.page = page; } public void setPage(String page) { if(null!=page&&!"".equals(page.trim())) this.page = Integer.parseInt(page); } public int getRows() { return rows; } public void setRows(int rows) { this.rows = rows; } public void setRows(String rows) { if(null!=rows&&!"".equals(rows.trim())) this.rows = Integer.parseInt(rows); } public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public void setTotal(String total) { this.total = Integer.parseInt(total); } public boolean isPagination() { return isPagination; } public void setPagination(boolean isPagination) { this.isPagination = isPagination; } public void setPagination(String isPagination) { if(null!=isPagination&&!"".equals(isPagination.trim())) this.isPagination = Boolean.parseBoolean(isPagination); } /** * 获取分页起始标记位置 * @return */ public int getStartIndex() { //(当前页码-1)*显示记录数 return (this.getPage()-1)*this.rows; } /** * 末页 * @return */ public int getMaxPage() { int totalpage=this.total/this.rows; if(this.total%this.rows!=0) totalpage++; return totalpage; } /** * 下一页 * @return */ public int getNextPage() { int nextPage=this.page+1; if(this.page>=this.getMaxPage()) nextPage=this.getMaxPage(); return nextPage; } /** * 上一页 * @return */ public int getPreivousPage() { int previousPage=this.page-1; if(previousPage<1) previousPage=1; return previousPage; } @Override public String toString() { return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination + "]"; } }
创建一个分页标签工具类 PageTag
javapackage com.CloudJun.tag; import com.CloudJun.utils.PageBean; import java.io.IOException; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.BodyTagSupport; public class PageTag extends BodyTagSupport{ private PageBean pageBean;// 包含了所有分页相关的元素 public PageBean getPageBean() { return pageBean; } public void setPageBean(PageBean pageBean) { this.pageBean = pageBean; } @Override public int doStartTag() throws JspException { // 没有标签体,要输出内容 JspWriter out = pageContext.getOut(); try { out.print(toHTML()); } catch (IOException e) { e.printStackTrace(); } return super.doStartTag(); } private String toHTML() { StringBuffer sb = new StringBuffer(); // 隐藏的form表单---这个就是上一次请求下次重新发的奥义所在 // 上一次请求的URL sb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>"); sb.append(" <input type='hidden' name='page'>"); // 上一次请求的参数 Map<String, String[]> paramMap = pageBean.getMap(); if(paramMap != null && paramMap.size() > 0) { Set<Entry<String, String[]>> entrySet = paramMap.entrySet(); for (Entry<String, String[]> entry : entrySet) { // 参数名 String key = entry.getKey(); // 参数值 for (String value : entry.getValue()) { // 上一次请求的参数,再一次组装成了新的Form表单 // 注意:page参数每次都会提交,我们需要避免 if(!"page".equals(key)) { sb.append(" <input type='hidden' name='"+key+"' value='"+value+"' >"); } } } } sb.append("</form>"); // 分页条 sb.append("<ul class='pagination justify-content-center'>"); sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'"); sb.append(" href='javascript:gotoPage(1)'>首页</a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'"); sb.append(" href='javascript:gotoPage("+pageBean.getPreivousPage()+")'><</a></li>");// less than 小于号 // sb.append(" <li class='page-item'><a class='page-link' href='#'>1</a></li>"); // sb.append(" <li class='page-item'><a class='page-link' href='#'>2</a></li>"); sb.append(" <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getNextPage()+")'>></a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getMaxPage()+")'>尾页</a></li>"); sb.append(" <li class='page-item go-input'><b>到第</b><input class='page-link'"); sb.append(" type='text' id='skipPage' name='' /><b>页</b></li>"); sb.append(" <li class='page-item go'><a class='page-link'"); sb.append(" href='javascript:skipPage()'>确定</a></li>"); sb.append(" <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>"); sb.append("</ul>"); // 分页执行的JS代码 sb.append("<script type='text/javascript'>"); sb.append(" function gotoPage(page) {"); sb.append(" document.getElementById('pageBeanForm').page.value = page;"); sb.append(" document.getElementById('pageBeanForm').submit();"); sb.append(" }"); sb.append(" function skipPage() {"); sb.append(" var page = document.getElementById('skipPage').value;"); sb.append(" if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.getMaxPage()+") {"); sb.append(" alert('请输入1~"+pageBean.getMaxPage()+"的数字');"); sb.append(" return;"); sb.append(" }"); sb.append(" gotoPage(page);"); sb.append(" }"); sb.append("</script>"); return sb.toString(); } }
最后创建一个控制器 HotelController
javapackage com.CloudJun.web; import com.CloudJun.biz.Hotelbiz; import com.CloudJun.model.Hotel; import com.CloudJun.utils.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpServletRequest; import java.util.List; /** * @author CloudJun * @create 2023-09-07 14:24 */ @Controller @RequestMapping("/hot") public class HotelController { @Autowired private Hotelbiz hotelbiz; @RequestMapping("/list") public String list(Hotel hotel, HttpServletRequest request){ PageBean pageBean = new PageBean(); pageBean.setRequest(request); List<Hotel> hotels = hotelbiz.selectHotelPage(hotel, pageBean); request.setAttribute("list",hotels); request.setAttribute("pageBean",pageBean); return "hot/index"; } @RequestMapping("/del") public String del(Hotel hotel,HttpServletRequest request){ hotelbiz.deleteByPrimaryKey(hotel.getHid()); return "redirect:list"; } @RequestMapping("/edit") public String edit(Hotel hotel,HttpServletRequest request){ hotelbiz.updateByPrimaryKeySelective(hotel); return "redirect:list"; } @RequestMapping("/add") public String add(Hotel hotel,HttpServletRequest request){ hotelbiz.insertSelective(hotel); return "redirect:list"; } @RequestMapping("/revise") public String getHid(Hotel hotel,HttpServletRequest request){ if (hotel != null && hotel.getHid() != null && hotel.getHid() != 0){ Hotel h = hotelbiz.selectByPrimaryKey(hotel.getHid()); request.setAttribute("h",h); } return "hot/edit"; } }
五、前端代码
在WEB-INF文件中创建一个static包,以免配置文件报错
再创建一个JSP后台显示界面 名为: index.jsp
html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link
href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
rel="stylesheet">
<script
src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>酒店后台管理系统</title>
<style type="text/css">
.page-item input {
padding: 0;
width: 40px;
height: 100%;
text-align: center;
margin: 0 6px;
}
.page-item input, .page-item b {
line-height: 38px;
float: left;
font-weight: 400;
}
.page-item.go-input {
margin: 0 10px;
}
</style>
</head>
<body>
<form class="form-inline"
action="${pageContext.request.contextPath }/hot/list" method="post">
<div class="form-group mb-2">
<input type="text" class="form-control-plaintext" name="hname"
placeholder="请输入书籍名称">
<%-- <input name="rows" value="10" type="hidden">--%>
<!-- 不想分页 -->
<%-- <input name="pagination" value="false" type="hidden">--%>
</div>
<button type="submit" class="btn btn-primary mb-2">查询</button>
<a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/hot/revise">新增</a>
</form>
<table class="table table-striped">
<thead>
<tr>
<th scope="col">房间编号</th>
<th scope="col">房间名称</th>
<th scope="col">房间类型</th>
<th scope="col">操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="h" items="${list }">
<tr>
<td>${h.hid }</td>
<td>${h.hname }</td>
<td>${h.htype }</td>
<td>
<a href="${pageContext.request.contextPath }/hot/revise?hid=${h.hid}">修改</a>
<a href="${pageContext.request.contextPath }/hot/del?hid=${h.hid}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
</body>
</html>
创建一个jsp编辑界面,名称为 edit.jsp
html
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>酒店管理编辑界面</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/hot/${empty h ? 'add' : 'edit'}" method="post">
房间编号:<input type="text" ${h!=null?'disabled':''} name="hid" value="${h.hid }"><br>
房间名称:<input type="text" name="hname" value="${h.hname }"><br>
房间类型:<input type="text" name="htype" value="${h.htype }"><br>
<input type="submit">
</form>
</body>
</html>
六、功能测试
最后开启服务器,在浏览器中请求以下地址( 请求地址是根据自己配置来进行访问的 ): http://localhost:8080/ssm/hot/list
访问后的显示效果为以下界面 :
增
修
删
查
给我们带来的收获
学习使用SpringMVC完成CRUD可以给我们带来以下收获:
- 理解MVC架构:SpringMVC是基于MVC(Model-View-Controller)架构的框架,通过学习使用SpringMVC完成CRUD,可以更加深入地理解MVC架构的原理和优势。
- 掌握Web开发的基本原理:SpringMVC是一种用于构建Web应用程序的框架,学习使用SpringMVC完成CRUD可以帮助我们掌握Web开发的基本原理,包括请求-响应模型、URL映射、请求参数处理等。
- 提高代码的可维护性:SpringMVC提供了一套规范和约定,通过学习使用SpringMVC完成CRUD,可以帮助我们编写更加结构化和可维护的代码,提高代码的可读性和可维护性。
- 学习使用Spring框架的其他功能:SpringMVC是Spring框架的一部分,学习使用SpringMVC完成CRUD可以帮助我们了解和使用Spring框架的其他功能,如依赖注入、AOP等。
- 提高开发效率:SpringMVC提供了很多便捷的功能和工具,如数据绑定、表单验证、异常处理等,学习使用SpringMVC完成CRUD可以提高开发效率,减少重复劳动。
总之,学习使用SpringMVC完成CRUD可以帮助我们提升自己的Web开发能力,掌握一种流行的Web框架,并且提高代码的可维护性和开发效率。