1、jdbc.properties
javajdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql:///studb jdbc.user=root jdbc.pwd=123456
2、beans.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: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd"> <!--导入jdbc.properties--> <context:property-placeholder location="classpath:jdbc.properties"/> <!--创建数据源连接处--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${jdbc.driver}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.user}"/> <property name="password" value="${jdbc.pwd}"/> <property name="initialSize" value="5"/> <property name="maxWait" value="5000"/> </bean> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource"/> </bean> </beans>
3、Student.java
javapackage com.atguigu.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Student { private Integer id; private String name; private String gender; private Integer age; private String classBean; }
4、JdbcTemplateTest.java
javapackage com.atguigu; import com.atguigu.pojo.Student; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.test.context.junit.jupiter.SpringJUnitConfig; import javax.sql.DataSource; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; @SpringJUnitConfig(locations = "classpath:beans.xml") public class JdbcTemplateTest { @Autowired private DataSource dataSource; @Autowired private JdbcTemplate jdbcTemplate; //测试连接数据库 @Test public void TestConnection() throws SQLException { System.out.println(dataSource.getConnection()==null?"连接失败":"连接成功");//连接成功 } //测试插入操作 @Test public void InsertTest() { Student s1= new Student(0, "阿碧", "女", 18, "Java1班"); String sql = "insert into students values(0,?,?,?,?)"; jdbcTemplate.update(sql, s1.getName(), s1.getGender(), s1.getAge(), s1.getClassBean()); } //演示删除学生信息测试方法 @Test public void DeleteTest() { String sql = "delete from students where id=?"; jdbcTemplate.update(sql, 0); } //演示查询单个字段值 @Test public void QueryTest() { String sql = "select name from students where id=?"; String name = jdbcTemplate.queryForObject(sql, String.class, 8); System.out.println("name = " + name);//name = 吴十 } //演示查询单个实体对象 @Test public void QueryObjectTest() { String sql = "select * from students where id=?"; Student s = jdbcTemplate.queryForObject(sql, new RowMapper<Student>() { @Override public Student mapRow(ResultSet rs, int rowNum) throws SQLException { return new Student(rs.getInt(1), rs.getString(2), rs.getString(3), rs.getInt(4), rs.getString(5)); } }, 8); System.out.println("s = " + s);//s = Student(id=8, name=吴十, gender=男, age=19, classBean=高中二班) } //演示查询单个实体对象 @Test public void QueryObjectLambdaTest() { String sql = "select * from students where id=?"; Student s = jdbcTemplate.queryForObject(sql,(rs,rowNum)-> new Student(rs.getInt(1), rs.getString(2), rs.getString(3), rs.getInt(4), rs.getString(5)) , 8); System.out.println("s = " + s);//s = Student(id=8, name=吴十, gender=男, age=19, classBean=高中二班) } //演示查询实体对象列表 @Test public void QueryObjectListTest() { String sql = "select id,name,gender,age,class as classBean from students"; List<Student> studentList = jdbcTemplate.query(sql, new BeanPropertyRowMapper<>(Student.class)); studentList.forEach(System.out::println); //Student(id=1, name=张三, gender=男, age=20, classBean=高中一班) //Student(id=2, name=李四, gender=男, age=19, classBean=高中二班) //Student(id=3, name=王五, gender=女, age=18, classBean=高中一班) //Student(id=4, name=赵六, gender=女, age=20, classBean=高中三班) //Student(id=5, name=刘七, gender=男, age=19, classBean=高中二班) //Student(id=6, name=陈八, gender=女, age=18, classBean=高中一班) //Student(id=7, name=杨九, gender=男, age=20, classBean=高中三班) //Student(id=8, name=吴十, gender=男, age=19, classBean=高中二班) } }
5、studb.sql
sqlcreate database studb; use studb; CREATE TABLE students ( id INT PRIMARY KEY, name VARCHAR(50) NOT NULL, gender VARCHAR(10) NOT NULL, age INT, class VARCHAR(50) ); INSERT INTO students (id, name, gender, age, class) VALUES (1, '张三', '男', 20, '高中一班'), (2, '李四', '男', 19, '高中二班'), (3, '王五', '女', 18, '高中一班'), (4, '赵六', '女', 20, '高中三班'), (5, '刘七', '男', 19, '高中二班'), (6, '陈八', '女', 18, '高中一班'), (7, '杨九', '男', 20, '高中三班'), (8, '吴十', '男', 19, '高中二班');
6、父工程pom.xml
XML<properties> <maven.compiler.source>17</maven.compiler.source> <maven.compiler.target>17</maven.compiler.target> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring.version>6.0.6</spring.version> <junit.version>5.3.1</junit.version> <lombok.version>1.18.20</lombok.version> <mysql.version>8.0.25</mysql.version> <druid.version>1.2.8</druid.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> <version>${junit.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </dependencyManagement>
7、子工程pom.xml
XML<dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </dependency>
spring-jdbc-template是Spring框架中提供的一个JDBC模板,简化了开发者对JDBC API的调用。你可以使用它来执行各种JDBC操作,如查询、插入、更新、删除等。下面是使用spring-jdbc-template的步骤:
- 添加spring-jdbc依赖
首先需要在Maven或Gradle项目中添加spring-jdbc依赖。
XML<dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.3.6</version> </dependency>
- 配置数据源
配置使用的数据源,在Spring配置文件中添加以下配置。
XML<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/test"/> <property name="username" value="root"/> <property name="password" value="root"/> </bean>
- 配置JdbcTemplate
配置JdbcTemplate,配置JdbcTemplate时需要注入数据源。
XML<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource"/> </bean>
- 使用JdbcTemplate
最后,你可以在Java代码中使用JdbcTemplate。
java@Autowired private JdbcTemplate jdbcTemplate; public void insert(User user) { String sql = "INSERT INTO users (name, age) VALUES (?, ?)"; jdbcTemplate.update(sql, user.getName(), user.getAge()); }
以上是使用spring-jdbc-template的步骤,你可以根据项目的需要来调整代码实现,具体的JDBC操作方法可以在Spring的官方文档中查找。
Spring-jdbcTemplate-配置数据库连接池,配置文件方式beans.xml
丁总学Java2023-11-29 12:21
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