<?xml version="1.0" encoding="UTF-8"?>
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
-<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
<relativePath/>
<!-- lookup parent from repository -->
</parent>
<groupId>com.ch</groupId>
<artifactId>ch6_5</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>ch6_5</name>
<description>Demo project for Spring Boot</description>
-<properties>
<java.version>11</java.version>
</properties>
-<dependencies>
-<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 添加MySQL依賴 -->
-<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.45</version>
<!-- MySQL8.x時(shí)，請(qǐng)使用8.x的連接器 -->
</dependency>
<!-- 添加jdbc依賴 -->
-<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
-<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
-<build>
-<plugins>
-<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

package com.ch.ch6_5.entity;
public class MyUser {
	private Integer id;
	private String username;
	private String password;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	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;
	}
}

package com.ch.ch6_5.repository;
import java.util.List;
import com.ch.ch6_5.entity.MyUser;
public interface MyUserRepository {
	public int saveUser(MyUser myUser);
	public int deleteUser(Integer id);
	public int updateUser(MyUser myUser);
	public List<MyUser> findAll();
	public MyUser findUserById(Integer id);
}

package com.ch.ch6_5.repository;
import java.util.List;
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.stereotype.Repository;
import com.ch.ch6_5.entity.MyUser;
@Repository
public class MyUserRepositoryImpl implements MyUserRepository{
	@Autowired
	private JdbcTemplate jdbcTemplate;
	@Override
	public int saveUser(MyUser myUser) {
		String sql = "insert into user (username, password) values (?,?)";
		Object args[] = {
				myUser.getUsername(),
				myUser.getPassword()
		};
		return jdbcTemplate.update(sql, args);
	}
	@Override
	public int deleteUser(Integer id) {
		String sql = "delete from user where id = ? ";
		Object args[] = {
				id
		};
		return jdbcTemplate.update(sql, args);
	}
	@Override
	public int updateUser(MyUser myUser) {
		String sql = "update user set username = ?, password = ? where id = ? ";
		Object args[] = {
				myUser.getUsername(),
				myUser.getPassword(),
				myUser.getId()
		};
		return jdbcTemplate.update(sql, args);

package com.ch.ch6_5.service;
import java.util.List;
import com.ch.ch6_5.entity.MyUser;
public interface MyUserService {
	public int saveUser(MyUser myUser);
	public int deleteUser(Integer id);
	public int updateUser(MyUser myUser);
	public List<MyUser> findAll();
	public MyUser findUserById(Integer id);
}

package com.ch.ch6_5.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ch.ch6_5.entity.MyUser;
import com.ch.ch6_5.repository.MyUserRepository;
@Service
public class MyUserServiceImpl implements MyUserService{
	@Autowired
	private MyUserRepository myUserRepository;
	@Override
	public int saveUser(MyUser myUser) {
 
	public List<MyUser> findAll() {
		return myUserRepository.findAll();
	}
	@Override
	public MyUser findUserById(Integer id) {
		return myUserRepository.findUserById(id);
	}
}

package com.ch.ch6_5.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
im
	public int updateUser(MyUser myUser) {
		return myUserService.updateUser(myUser);
	}
	@RequestMapping("/findAll")
	public List<MyUser> findAll(){
		return myUserService.findAll();
	}
	@RequestMapping("/findUserById")
	public MyUser findUserById(Integer id) {
		return myUserService.findUserById(id);
	}
}