最近在学习Spring Boot，继续前面的学习，这一次我们加入MySQL数据库和JPA。

配置:

pom.xml文件

<!-- 添加Mysql和JPA--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>

在Application.properties(在resource文件夹下新建，进行配置)文件中添加数据进行配置：

spring.datasource.url = jdbc:mysql://localhost:3306/spring_boot spring.datasource.username = root spring.datasource.password = root spring.datasource.driverClassName = com.mysql.jdbc.Driver # Specify the DBMS spring.jpa.database = MYSQL # Show or not log for each sql query spring.jpa.show-sql = true # Hibernate ddl auto (create, create-drop, update) spring.jpa.hibernate.ddl-auto = update # Naming strategy spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy # stripped before adding them to the entity manager) spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

User类

package com.seawater.bean; import javax.persistence.*; import javax.validation.constraints.NotNull; /** * Created by zhouhs on 2016/12/30. */ @Entity @Table(name = "user") public class User { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String name; private int age; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }

UserController

package com.seawater.controller; import com.seawater.Dao.UserDao; import com.seawater.bean.User; import io.swagger.annotations.Api; import io.swagger.annotations.ApiImplicitParam; import io.swagger.annotations.ApiImplicitParams; import io.swagger.annotations.ApiOperation; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; /** * Created by zhouhs on 2016/12/30. */ @RestController @RequestMapping(value = "/user") @Api(description = "用户") public class UserController { @Resource UserDao userDAO; @ApiOperation(value = "添加用户") @ApiImplicitParams({ @ApiImplicitParam(name = "name" , value = "name" , paramType = "query" , required = true ), @ApiImplicitParam(name = "age" , value = "age" , paramType = "query" , required = true ) }) @RequestMapping(value = "/addUser" , method = RequestMethod.POST) public String addUser(@RequestParam(value = "name") String name,@RequestParam(value = "age") int age){ User user = new User(); user.setName(name); user.setAge(age); userDAO.save(user); return "add user success !"; } @ApiOperation(value = "查找用户") @ApiImplicitParam(name = "id" , value = "id" , paramType = "query" , required = true , dataType = "int") @RequestMapping(value = "/findById" , method = RequestMethod.POST) public String findById(@RequestParam(value = "id") Long id){ User user = userDAO.findById(id); if(user == null){ return "error"; }else{ return "name:" + user.getName() + " , age:" + user.getAge(); } } @ApiOperation(value = "查询所有用户") @RequestMapping(value = "/findAll" , method = RequestMethod.POST) public Iterable findAll(){ Iterable<User> userList = userDAO.findAll(); return userList; } @ApiOperation(value = "删除用户") @ApiImplicitParam(name = "id" , value = "id" , paramType = "query" , required = true , dataType = "int") @RequestMapping(value = "/deleteById" , method = RequestMethod.POST) public String deleteById(@RequestParam(value = "id") Long id){ userDAO.delete(id); return "delete success !"; } }

数据表(id定义为Integer)：

UserDao:

package com.seawater.Dao; import com.seawater.bean.User; import org.springframework.data.repository.CrudRepository; /** * Created by zhouhs on 2016/12/30. */ public interface UserDao extends CrudRepository<User, Long> { public User findById(Long id); }

然后启动项目：访问http://localhost:8081/swagger-ui.html

结果：

方法我就不一一操作了。

源码地址(项目中的源码可能会更多哦，需要自己找到对应源码)：SpringBootLearning_jb51.rar

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。