JPA实现简单的增删改查功能
JPA实现简单的增删改查功能
-----------------------------------------model类---------------------------------------------------
package com.dfl.ycp3.stock.common.model;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.io.Serializable;
import java.util.Date;
/**
* @author fyq
* @time 2019/12/03
* @Description 学生实体类
*/
@Entity
@Table(name = "student")
@Data
public class Student implements Serializable {
private static final long serialVersionUID = -2333472778385823832L;
//学号
@Id
@Column(name = "studentnumber")
private String studentNumber;
//姓名
@Column(name = "studentname")
private String studentName;
//性别
@Column(name = "studentsex")
private String studentSex;
//出生日期
@Column(name = "studentbirthday")
@JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8")
private Date studentBirthday;
//年龄
@Column(name = "studentage")
private Integer studentAge;
//爱好
@Column(name = "studenthobby")
private String studentHobby;
//创建时间
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
@Column(name = "createtime")
private Date createTime;
//创建人
@Column(name = "creator")
private String creator;
//更新时间
@Column(name = "updatetime")
private Date updateTime;
//更新人
@Column(name = "updateperson")
private String updatePerson;
public Student() {
}
public Student(String studentNumber, String studentName, String studentSex, Date studentBirthday, Integer studentAge,
String studentHobby, Date createTime, String creator, Date updateTime, String updatePerson) {
this.studentNumber = studentNumber;
this.studentName = studentName;
this.studentSex = studentSex;
this.studentBirthday = studentBirthday;
this.studentAge = studentAge;
this.studentHobby = studentHobby;
this.createTime = createTime;
this.creator = creator;
this.updateTime = updateTime;
this.updatePerson = updatePerson;
}
public String getStudentNumber() {
return studentNumber;
}
public void setStudentNumber(String studentNumber) {
this.studentNumber = studentNumber;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public String getStudentSex() {
return studentSex;
}
public void setStudentSex(String studentSex) {
this.studentSex = studentSex;
}
public Date getStudentBirthday() {
return studentBirthday;
}
public void setStudentBirthday(Date studentBirthday) {
this.studentBirthday = studentBirthday;
}
public Integer getStudentAge() {
return studentAge;
}
public void setStudentAge(Integer studentAge) {
this.studentAge = studentAge;
}
public String getStudentHobby() {
return studentHobby;
}
public void setStudentHobby(String studentHobby) {
this.studentHobby = studentHobby;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public String getCreator() {
return creator;
}
public void setCreator(String creator) {
this.creator = creator;
}
public Date getUpdateTime() {
return updateTime;
}
public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}
public String getUpdatePerson() {
return updatePerson;
}
public void setUpdatePerson(String updatePerson) {
this.updatePerson = updatePerson;
}
}
-----------------------------------------Dao层---------------------------------------------------
package com.dfl.ycp3.stock.repository;
import com.dfl.ycp3.stock.common.model.Student;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import java.util.Date;
import java.util.List;
@Repository
public interface StudentDao extends JpaRepository<Student,Integer>, JpaSpecificationExecutor<Student> {
//查询全部
@Query(value = "SELECT s FROM Student s order by s.studentNumber")
List<Student> findAll();
//按学号查询
@Query(value = "SELECT s FROM Student s WHERE s.studentNumber in(?1)")
Student findByStudentNumber(String studentNumber);
//按学号修改
@Modifying
@Transactional
@Query(value = "update Student set studentName= :studentName ,studentSex= :studentSex ,studentBirthday= :studentBirthday ," +
"studentAge= :studentAge ,studentHobby= :studentHobby ,createTime= :createTime ,creator= :creator ," +
"updateTime= :updateTime ,updatePerson= :updatePerson where studentNumber = :studentNumber")
void updateByStudentNumber(
@Param("studentName")String studentName, @Param("studentSex")String studentSex,
@Param("studentBirthday") Date studentBirthday, @Param("studentAge")Integer studentAge,
@Param("studentHobby")String studentHobby, @Param("createTime")Date createTime,
@Param("creator")String creator, @Param("updateTime")Date updateTime,
@Param("updatePerson")String updatePerson,@Param("studentNumber")String studentNumber);
//按学号删除
@Modifying
@Transactional
@Query(value = "delete from Student where studentNumber= :studentNumber ")
void deleteByStudentNumber(String studentNumber);
}
注意：
1、查询语句中的“Student”是实体类的名字，不是数据库的名字
2、修改和删除的返回值类型只有void，int和Integer三种
3、@Modifying需要和@Transactional配合使用才能正常使用。
@Modifying的作用是声明执行的sql语句是修改（修改或删除）操作，@Transactional的作用是提供事务支持，当@Query发生错误时，会回滚到执行前的状态
-----------------------------------------Controller---------------------------------------------------
package com.dfl.ycp3.stock.controller.api;
import com.dfl.ycp3.common.utils.DateUtil;
import com.dfl.ycp3.stock.common.model.Student;
import com.dfl.ycp3.stock.repository.StudentDao;
import com.wordnik.swagger.annotations.ApiParam;
import com.yichengpai.common.util.Result;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.web.bind.annotation.*;
import java.util.Date;
import java.util.List;
@Api(description = "学生信息")
@RestController
@RequestMapping(value = "/student")
public class StudentController {
@Autowired
private StudentDao studentDao;
private static final Logger logger= LoggerFactory.getLogger(StudentController.class);
@ApiOperation(value = "查询学生信息",httpMethod = "GET")
@RequestMapping(value = "/findAll",method = RequestMethod.GET)
public List<Student> findAll(){
List<Student> list = studentDao.findAll();
return list;
}
@ApiOperation(value = "按学号查询学生信息",httpMethod = "GET")
@RequestMapping(value = "/findByStudentNumber",method = RequestMethod.GET)
public Result findByStudentNumber(
@RequestParam(value = "studentNumber",required = true) String studentNumber
){
Student student = studentDao.findByStudentNumber(studentNumber);
if (student == null){
return Result.fail("fail", "该学号不存在，无法查询！");
}
return Result.success(student);
}
@ApiOperation(value = "添加学生信息",httpMethod = "POST")
@RequestMapping(value = "/addStudent",method = RequestMethod.POST)
public Result addStudent(
@ApiParam("学号(唯一，不可重复)") @RequestParam(value = "studentNumber", required = true) String studentNumber,
@ApiParam("姓名") @RequestParam(value = "studentName", required = true) String studentName,
@ApiParam("性别") @RequestParam(value = "studentSex", required = false) String studentSex,
@ApiParam("出生日期") @RequestParam(value = "studentBirthday", required = false) String studentBirthday,
@ApiParam("年龄") @RequestParam(value = "studentAge", required = false) Integer studentAge,
@ApiParam("爱好") @RequestParam(value = "studentHobby", required = false) String studentHobby,
@ApiParam("创建时间") @RequestParam(value = "createTime", required = false) String createTime,
@ApiParam("创建人") @RequestParam(value = "creator", required = false) String creator,
@ApiParam("更新时间") @RequestParam(value = "updateTime", required = false) String updateTime,
@ApiParam("更新人") @RequestParam(value = "updatePerson", required = false) String updatePerson
) {
Date birthday = DateUtil.parseStringToDate(studentBirthday,"yyyy-MM-dd");
Date ctime = DateUtil.parseStringToDate(createTime+" 00:00:00","yyyy-MM-dd HH:mm:ss");
Date utime = DateUtil.parseStringToDate(updateTime+" 00:00:00","yyyy-MM-dd HH:mm:ss");
Student student = studentDao.findByStudentNumber(studentNumber);
if(student !=null){
return Result.fail("fail", "该学号已经存在，不可重复添加！");
}else {
studentDao.save(new Student(studentNumber, studentName, studentSex, birthday, studentAge, studentHobby, ctime, creator, utime, updatePerson));
return Result.success("");
}
}
@ApiOperation(value = "按学号修改学生信息",httpMethod = "POST")
@RequestMapping(value = "/updateByStudentNumber",method = RequestMethod.POST)
public Result updateByStudentNumber(
@ApiParam("学号(唯一，不可重复)") @RequestParam(value = "studentNumber", required = true) String studentNumber,
@ApiParam("姓名") @RequestParam(value = "studentName", required = false) String studentName,
@ApiParam("性别") @RequestParam(value = "studentSex", required = false) String studentSex,
@ApiParam("出生日期") @RequestParam(value = "studentBirthday", required = false) String birthday,
@ApiParam("年龄") @RequestParam(value = "studentAge", required = false) Integer studentAge,
@ApiParam("爱好") @RequestParam(value = "studentHobby", required = false) String studentHobby,
@ApiParam("创建时间") @RequestParam(value = "createTime", required = false) String ctime,
@ApiParam("创建人") @RequestParam(value = "creator", required = false) String creator,
@ApiParam("更新时间") @RequestParam(value = "updateTime", required = false) String utime,
@ApiParam("更新人") @RequestParam(value = "updatePerson", required = false) String updatePerson
) {
Date studentBirthday = DateUtil.parseStringToDate(birthday,"yyyy-MM-dd");
Date createTime = DateUtil.parseStringToDate(ctime+" 00:00:00","yyyy-MM-dd HH:mm:ss");
Date updateTime = DateUtil.parseStringToDate(utime+" 00:00:00","yyyy-MM-dd HH:mm:ss");
Student student = studentDao.findByStudentNumber(studentNumber);
if (student != null){
studentDao.updateByStudentNumber(studentName,studentSex,studentBirthday,studentAge,studentHobby,
createTime,creator,updateTime,updatePerson,studentNumber);
return Result.success("");
}else{
return Result.fail("fail", "该学号不存在，无法修改！");
}
}
@ApiOperation(value = "按学号删除学生信息",httpMethod = "POST")
@RequestMapping(value = "/deleteByStudentNumber",method = RequestMethod.POST)
public Result deleteByStudentNumber(
@ApiParam("按学号删除") @RequestParam(value = "studentNumber", required = true) String studentNumber
) {
Student student = studentDao.findByStudentNumber(studentNumber);
if (student !=null){
studentDao.deleteByStudentNumber(studentNumber);
return Result.success("");
}else{
return Result.fail("fail", "该学号不存在，无法删除！");
}
}
}