导入依赖
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.cmy</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-data-jpa</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-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>
DataJpaApplication类
package com.cmy;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DataJpaApplication {
public static void main(String[] args) {
SpringApplication.run(DataJpaApplication.class, args);
}
}
StudentDao类
package com.cmy.dao;
import com.cmy.entity.Student;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import java.util.List;
public interface StudentDao extends JpaRepository<Student,Integer>{
@Query(value="select * from studentinfo where stu_name=?1",nativeQuery = true)
Student findByStuname(String stuname);
List<Student> findByStunameLike(String stuname);
}
Student类
import javax.persistence.*;
@Entity
@Table(name = "studentinfo")
public class Student {
@Id
@GeneratedValue
private Integer id;
private String name;
private Integer age;
private Integer sex;
@Column(name = "stu_name")
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Integer getSex() {
return sex;
}
public void setSex(Integer sex) {
this.sex = sex;
}
public Student(Integer id, String name, Integer age, Integer sex) {
this.id = id;
this.name = name;
this.age = age;
this.sex = sex;
}
}
StudentController类
import com.cmy.dao.StudentDao;
import com.cmy.entity.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.Arrays;
import java.util.List;
@Controller //@Controller+@ResponseBody
public class StudentController {
@Autowired
StudentDao dao;
@RequestMapping("/saveAllStudent")
public String saveAllStudent(){
//Hibernate:瞬时状态 游离状态 持久状态
List<Student> students = Arrays.asList(new Student("利亚东哥", 1, 24),
new Student("李先玉", 0, 23),
new Student("雄哥", 1, 24));
dao.saveAll(students);
//save(T t):向数据库中增加单条记录
//saveAll(Iterable i):增加多条记录
//saveAndFlush():增加并刷新缓存
return "success";
}
@RequestMapping("/deleteYeShou")
public String deleteYeShou(){
//dao.deleteById(4); 通过ID删除单条记录
Student yeshou1=new Student();
yeshou1.setId(1);
Student yeshou2=new Student();
yeshou2.setId(3);
dao.deleteAll(Arrays.asList(yeshou1,yeshou2)); //批量删除
return "success";
}
@RequestMapping("/modifyBeantifulGirl")
public String modifyStudent(){
Student one = dao.getOne(9); //检索单条记录的方法
one.setAge(18);
one.setStuname("玉姐");
dao.save(one); //修改数据的作用
return "success";
}
@RequestMapping("/getAll")
@ResponseBody
public Object getAll(){
return dao.findAll();
}
@RequestMapping("/getByName")
@ResponseBody
public Object getByName(){
return dao.findByStuname("玉姐");
}
@RequestMapping("/getLike")
@ResponseBody
public Object getByName(String name){
return dao.findByStunameLike("%"+name+"%");
}
@RequestMapping("/getPage")
@ResponseBody
public Object getPage(@RequestParam(required = false,defaultValue = "1")Integer pageindex){
PageRequest pageRequest=new PageRequest(pageindex-1,2, Sort.Direction.DESC,"id");
return dao.findAll(pageRequest);
}
}
success.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script type="text/javascript"></script>
</head>
<body>
加入成功 美女与野兽
</body>
</html>
application.properties
#配置数据库的四个连接参数
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:8080/account
spring.datasource.username=root
spring.datasource.password=123
#Spring Data JPA的配置
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jackson.serialization.indent-output=true
spring.jpa.database=mysql
DataJpaApplicationTests
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class DataJpaApplicationTests {
@Test
public void contextLoads() {
}
}