Springboot2.x+Thymeleaf项目创建

事前准备

IDEA: 2022.02

JDK: 11

Maven: 3.8.6

1 创建项目

1.1 项目创建

IDEA > File > New > Module..

1.2 环境设置

1.2.1 Maven设置

File > Settings > 搜Maven > 设置

1.2.2 JDK设置

File > Project Structure... > Project > SDK （注释：Springboot2要求JDK8-11）

1.3 添加依赖

XML 复制代码

    <packaging>jar</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

1.4 创建启动类

java 复制代码

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Boot2ThymeleafApplication {
    public static void main(String[] args) {
        SpringApplication.run(Boot2ThymeleafApplication.class, args);
    }
}

2 过滤器

略：参照Springboot2.x+JSP项目创建-CSDN博客

3 拦截器

略：参照Springboot2.x+JSP项目创建-CSDN博客

4 控制器

java 复制代码

package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
@RequestMapping("/v1")
public class SampleController {
    @RequestMapping("/sample")
    public String sample(HttpServletRequest req) {
        req.setAttribute("hello", "hello thymeleaf");
        return "sample";
    }
}

5 前端页面

5.1 添加依赖

XML 复制代码

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

5.2 更改配置

application.properties

XML 复制代码

spring.thymeleaf.cache = true
spring.thymeleaf.encoding = UTF-8
spring.thymeleaf.mode = HTML5
#视图解析器
spring.thymeleaf.prefix = classpath:/templates/
spring.thymeleaf.suffix = .html

5.3 创建Thymeleaf页面

src/main/resources/templates/sample.html

html 复制代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <title>sample page</title>
</head>
<body>
<div th:text="${hello}">Sample page</div>
</body>
</html>

6 数据库

6.1 创建数据库

连接数据库: mysql -hlocalhost -P3306 -uroot -proot

创建数据库: create database springboot2;

切换数据库: use springboot2;

创建数据库表: create table user(username varchar(20) primary key, password varchar(100) not null);

插入数据：insert into user values('zhangsan', '123456');

6.2 MySQL数据库连接

6.2.1 添加依赖

pom.xml

XML 复制代码

        <dependency><!-- MySQL驱动 -->
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency><!-- JDBC连接 -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

6.2.2 配置连接信息

application.properties

XML 复制代码

# 数据库连接信息
spring.datasource.url=jdbc:mysql://localhost:3306/springboot2?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root

6.3 Druid数据源

6.3.1 添加依赖

pom.xml

XML 复制代码

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.16</version>
        </dependency>

6.3.2 配置信息

application.properties

XML 复制代码

# 数据源
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
# 初始化大小
spring.datasource.druid.initial-size=5
# 最小空闲数
spring.datasource.druid.min-idle=5
# 最大连接数
spring.datasource.druid.max-active=20

6.4 JPA持久层框架

6.4.1 添加依赖

pom.xml

XML 复制代码

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

6.4.2 配置信息

application.properties

XML 复制代码

# JPA
spring.jpa.database=mysql
# JPA数据平台
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
# 显示控制台SQL
spring.jpa.show-sql=true
# 自动更新表结构
spring.jpa.hibernate.ddl-auto=update

6.5 业务代码获取数据

6.5.1 Controller

java 复制代码

package com.example.controller;
 
import com.example.pojo.User;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 
import javax.servlet.http.HttpServletRequest;
 
@Controller
@RequestMapping("/v2")
public class UserController {
    @Autowired
    private UserService userService;
 
    @RequestMapping("/user")
    public String user(Model model){
        return "user";
    }
    @RequestMapping("/getUser")
    public String getUser(HttpServletRequest req){
        String username = req.getParameter("username");
        if (username == null || "".equals(username)) {
            return "user";
        }
        User user = userService.getUserById(username);
        if (user != null) {
            req.setAttribute("password", user.getPassword());
        }
        return "user";
    }
}

6.5.2 Service

java 复制代码

package com.example.service;

import com.example.pojo.User;

public interface UserService {
    User getUserById(String username);
}

java 复制代码

package com.example.service;

import com.example.dao.UserRepository;
import com.example.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Optional;

@Service
public class UserServiceImpl implements UserService{
    @Autowired
    private UserRepository repository;
    @Override
    public User getUserById(String username) {
        Optional<User> user = repository.findById(username);
        if(user.isPresent()) {
            return user.get();
        }
        return null;
    }
}

6.5.3 Pojo

java 复制代码

package com.example.pojo;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;

@Entity(name="user")
public class User {
    @Id
    private String username;
    @Column(name="password")
    private String password;

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

6.5.4 Repository接口

java 复制代码

package com.example.dao;

import com.example.pojo.User;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User, String> {
}

6.5.5 Thymeleaf

src/main/resources/templates/user.html

html 复制代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>

<br/>
Spring boot2 User page<br/>
<form name="form1" action="/v2/getUser" method="post">
    <input type="text" name="username" />
    <button>查询密码</button>
</form>
<div th:text="${password}"></div>
</body>
</html>

7 异常处理

application.properties

html 复制代码

# 关闭 Spring Boot 默认的 Whitelabel 错误页面
server.error.whitelabel.enabled=false

7.1 异常处理（Controller）

java 复制代码

package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
@RequestMapping("/v1")
public class TestExceptionController {

    @RequestMapping("/exceptionHome")
    public String home() {
        return "exceptionHome";
    }
    @RequestMapping("/exceptionTest")
    public String exceptionTest(HttpServletRequest req) {
        String param = req.getParameter("param");
        String[] params = param.split(",");
        for (int i=0; i<10; i++){
            String str = params[i]; //NullPointerException
            System.out.println(Integer.valueOf(str)); // NumberFormatException
        }
        return "exceptionHome";
    }

    @ExceptionHandler(value={NullPointerException.class})
    public String xxxExceptionHandle(HttpServletRequest req, Exception e) {
        req.setAttribute("msg", e.getMessage());
        return "error";
    }


}

7.2 全局异常处理

java 复制代码

package com.example.exception;
 
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
 
import javax.servlet.http.HttpServletRequest;
 
@ControllerAdvice
public class BusinessException {
    @ExceptionHandler(value={NumberFormatException.class})
    public String xxxExceptionHandle(Model model, Exception e) {
        model.addAttribute("msg", e.getMessage());
        return "error";
    }
    @ExceptionHandler(value={Exception.class})
    public String xxxExceptionHandle(HttpServletRequest req, Exception e) {
        req.setAttribute("msg", e.getMessage());
        return "error";
    }
}

7.3 异常画面

7.3.1 异常画面

src/main/resources/templates/error.html

html 复制代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>
<br/>
Spring boot2 Error Page<br/>
<div th:text="${msg}"></div>
</body>
</html>

7.3.2 异常测试画面

src/main/resources/templates/exceptionHome.html

html 复制代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>
Spring boot2 Test Exception Page<br/>
<form name="form1" action="/v1/exceptionTest" method="post">
    <input type="text" name="param" />
    <button>异常测试</button>
</form>
</body>
</html>

8 认证授权

8.1 添加依赖

XML 复制代码

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

8.2 数据做成

8.2.1 创建表

CREATE Table authority_user (username varchar(20), authkey varchar(20), authname varchar(20), primary key(username, authkey));

8.2.2 添加数据

insert into user values ('lisi', '123456')

insert into authority_user values ('zhangsan','admin','admin'),('zhangsan','user','user'),('lisi', 'user','user');

8.3 认证

8.3.1 业务认证

(1) UserDetailsService封装

java 复制代码

package com.example.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class UserDetailsServiceImpl implements UserDetailsService {
    @Autowired
    private LoginService service;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        com.example.pojo.User user = service. getUser(username);
        List<String> authorities = service.getAuthority(username);
        List<SimpleGrantedAuthority> list = authorities.stream()
                .map(authority -> new SimpleGrantedAuthority(authority))
                .collect(Collectors.toList());
        if ( user != null ) {
            return new User(user.getUsername(), user.getPassword(), list);
        } else {
            throw new UsernameNotFoundException("当前用户不存在");
        }
    }
}

(2) service

java 复制代码

package com.example.service;

import com.example.pojo.User;

import java.util.List;

public interface LoginService {
    User getUser(String username);
    List<String> getAuthority(String username);
}

java 复制代码

package com.example.service;

import com.example.dao.LoginRepository;
import com.example.dao.UserRepository;
import com.example.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class LoginServiceImpl implements LoginService{
    @Autowired
    private UserRepository userRepository;
    @Autowired
    private LoginRepository loginRepository;

    public User getUser(String username) {
        return userRepository.findById(username).orElse(null);
    }
    public List<String> getAuthority(String username) {
        return loginRepository.getAuthority(username);
    }
}

(3) repository

java 复制代码

package com.example.dao;

import com.example.pojo.AuthorityUser;
import com.example.pojo.AuthorityUserKey;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.Repository;

import java.util.List;

public interface LoginRepository extends Repository<AuthorityUser, AuthorityUserKey> {
    @Query("SELECT authname FROM authority_user WHERE username = ?1")
    List<String> getAuthority(String username);
}

8.3.2 认证配置类

java 复制代码

package com.example.config;

import com.example.service.UserDetailsServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

@EnableWebSecurity
public class WebSecurityConfig  extends WebSecurityConfigurerAdapter {
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
    @Autowired
    private UserDetailsServiceImpl service;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(service).passwordEncoder(passwordEncoder());
    }
}

8.4 授权

8.4.1 授权配置类

java 复制代码

@EnableWebSecurity
public class WebSecurityConfig  extends WebSecurityConfigurerAdapter {
    ...
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable();// 临时关闭，否则http请求无效

        http.authorizeRequests()
                .antMatchers("/v1").hasRole("admin")
                .antMatchers("/v2").hasRole("user")
                .antMatchers("/index","/password", "/updatePassword").permitAll()
                .anyRequest().authenticated();
        http.formLogin()
                .defaultSuccessUrl("/index")
                .failureUrl("/error");
        http.logout()
                .logoutUrl("/logout")
                .logoutSuccessUrl("/");
    }
}

8.4.2 授权登录后首页

(1) controller

java 复制代码

package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class LoginController {
    @RequestMapping("/index")
    public String index(){
        return "index";
    }
}

(2) 页面

index.html

html 复制代码

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title>Sample Page</title></head>
<body>Spring2.3.1 登录成功 首页</body>
<form name="form1" action="/logout" method="post">
    <button>退出登录</button>
</form>
</html>

8.5 数据加密

8.5.1 加密业务

(1) controller

java 复制代码

package com.example.controller;

import com.example.service.PasswordService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
public class PasswordController {

    @Autowired
    private PasswordService service;

    @RequestMapping("/password")
    public String password(){
        return "password";
    }

    @RequestMapping("/updatePassword")
    public String changePassword(HttpServletRequest req){
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        if (username == null || "".equals(username)) {
            req.setAttribute("msg", "请输入用户名");
            return "password";
        }
        if (password == null || "".equals(password)) {
            req.setAttribute("msg", "请输入密码");
            return "password";
        }
        int isOk = service.changePassword(username, password);
        if (isOk > 0){
            req.setAttribute("msg", "更新成功, "+ isOk +"件");
        } else {
            req.setAttribute("msg", "更新失败");
        }
        return "password";
    }

}

(2) service

java 复制代码

package com.example.service;

public interface PasswordService {
    int changePassword(String username, String password);
}

java 复制代码

package com.example.service;

import com.example.dao.PasswordRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

@Service
public class PasswordServiceImpl implements PasswordService{
    @Autowired
    private PasswordRepository repository;
    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    public int changePassword(String username, String password) {
        String newPassword = passwordEncoder.encode(password);
        return repository.updatePassword(username, newPassword);
    }
}

(3) repository

java 复制代码

package com.example.dao;

import com.example.pojo.User;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.Repository;
import org.springframework.transaction.annotation.Transactional;

public interface PasswordRepository extends Repository<User, String> {
    @Transactional
    @Modifying
    @Query("UPDATE user SET password = ?2 WHERE username = ?1")
    public int updatePassword(String username, String password);
}

(4) 页面

src/main/resources/templates/password.html

html 复制代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<html>
<head><meta charset="UTF-8"><title>Insert title here</title></head>
<body>
Springboot2 密码变更页面<br/>
<form name="form1" action="/updatePassword" method="post">
    用户名：<input type="text" name="username" /><br/>
    密码：<input type="password" name="password" /><br/>
    <button>更新密码</button>
</form>
<div th:text="${msg}"></div>
</body>
</html>

Springboot2.x+Thymeleaf项目创建

事前准备

1 创建项目

1.1 项目创建

1.2 环境设置

1.2.1 Maven设置

1.2.2 JDK设置

1.3 添加依赖

1.4 创建启动类

2 过滤器

3 拦截器

4 控制器

5 前端页面

5.1 添加依赖

5.2 更改配置

5.3 创建Thymeleaf页面

6 数据库

6.1 创建数据库

6.2 MySQL数据库连接

6.2.1 添加依赖

6.2.2 配置连接信息

6.3 Druid数据源

6.3.1 添加依赖

6.3.2 配置信息

6.4 JPA持久层框架

6.4.1 添加依赖

6.4.2 配置信息

6.5 业务代码获取数据

6.5.1 Controller

6.5.2 Service

6.5.3 Pojo

6.5.4 Repository接口

6.5.5 Thymeleaf

7 异常处理

7.1 异常处理（Controller）

7.2 全局异常处理

7.3 异常画面

7.3.1 异常画面

7.3.2 异常测试画面

8 认证授权

8.1 添加依赖

8.2 数据做成

8.2.1 创建表

8.2.2 添加数据

8.3 认证

8.3.1 业务认证

8.3.2 认证配置类

8.4 授权

8.4.1 授权配置类

8.4.2 授权登录后首页

8.5 数据加密

8.5.1 加密业务

8.5.2 加密操作

8.6 登录验证

9 其它功能

9.1 文件上传

9.2 文件下载