SpringBoot--JDBC

目录结构：

pom.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>com.didispace</groupId>
<artifactId>Chapter3-2-1</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>


<name>Chapter3-2-1</name>
<description>Spring Boot with JDBCTemplate</description>


<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>


<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>


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


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


<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>


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

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


</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

application.properties：

spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

service:

/**
 * @author 
 */
public interface UserService {

    /**
     * 新增一个用户
     * @param name
     * @param age
     */
    void create(String name, Integer age);


    /**
     * 根据name删除一个用户高
     * @param name
     */
    void deleteByName(String name);


    /**
     * 获取用户总量
     */
    Integer getAllUsers();


    /**
     * 删除所有用户
     */
    void deleteAllUsers();

}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;


/**
 * @author
 */
@Service
public class UserServiceImpl implements UserService {


    @Autowired
    private JdbcTemplate jdbcTemplate;


    @Override
    public void create(String name, Integer age) {
        jdbcTemplate.update("insert into USER(NAME, AGE) values(?, ?)", name, age);
    }


    @Override
    public void deleteByName(String name) {
        jdbcTemplate.update("delete from USER where NAME = ?", name);
    }


    @Override
    public Integer getAllUsers() {
        return jdbcTemplate.queryForObject("select count(1) from USER", Integer.class);
    }


    @Override
    public void deleteAllUsers() {
        jdbcTemplate.update("delete from USER");
    }

}

controller:

import javax.annotation.Resource;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.service.UserService;
@RestController
@RequestMapping("/user")
//http://localhost:8080/user/deleteAllUsers
public class UserController {

@Resource
private UserService userService;

@RequestMapping("/add")
@ResponseBody
public String add() {
userService.create("cxb", 22);
return "add SUCCESS";
}

@RequestMapping("/deleteByName")
@ResponseBody
public String deleteByName() {
userService.deleteByName("cxb");
return "deleteByName SUCCESS";
}

@RequestMapping("/getAllUsers")
public String get() {
Integer allUsers = userService.getAllUsers();
return "getAllUsers SUCCESS"+allUsers;
}

@RequestMapping("/deleteAllUsers")
public String delete() {
userService.deleteAllUsers();
return "deleteAllUsers SUCCESS";
}
}