SpringBoot+JPA学生管理系统项目开发(Java后台)
1：创建SpringBoot项目，在IDEA上进行项目的创建。创建过程和maven项目是不一样的。
这一步就和maven项目创建时要填写的项目的名称就一样啦，名称随便你定。我是在Group:com.kude.stu Artifact:kudestu 这样写的，你也可以和我的一样。
这个项目不需要太多配置，嘿嘿，是因为比较简单。看着我上面的配置，其他的在这个项目中一律不用配置。
Java代码项目文件中这样写，一定要和我一样。
resources和java目录创建好之时，它们的颜色都已经变啦！
项目最主要的就是pom.xml和application.properties文件的配置,接下来我把配置好的文件写在下面，你们把我的复制过去就OJ8K啦！！！
1.pom.xml
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.4.RELEASE
com.kude.stu
kudestu
0.0.1-SNAPSHOT
kudestu
Demo project for Spring Boot
1.8
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-devtools
runtime
mysql
mysql-connector-java
runtime
org.springframework.boot
spring-boot-starter-test
test
com.alibaba
druid
1.1.10
com.github.pagehelper
pagehelper-spring-boot-starter
1.2.10
org.springframework.boot
spring-boot-maven-plugin
2.application.properties
#数据源配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/wowoblog?useSSL=false&useUnicode=true&characterEncoding=utf-8&autoReconnect=true&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=
spring.datasource.initialSize=20
spring.datasource.minIdle=50
spring.datasource.maxActive=500
#上下文配置
server.port=8888
server.servlet.context-path=/kude
#配置jpa
#帮我们自动生成表结构
spring.jpa.properties.hibernate.hbm2ddl.auto=update
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.show-sql= true
spring.jpa.properties.hibernate.enable_lazy_load_no_trans=true
这里有你们要连接的数据库名，和连接数据库的账号的密码，你要自己参考我的修改一下欧。
3.StudentContriller
package com.kude.stu.kudestu.stu.controller;
import com.kude.stu.kudestu.stu.entity.Student;
import com.kude.stu.kudestu.stu.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.List;
@RestController
@RequestMapping("/s")
public class StudentController {
@Autowired
private StudentService studentService;
/**
* 添加学生
* @param student 要添加的学生对象
* @return
*/
@PostMapping("/add")
public Student save(Student student){
return studentService.save(student);
}
/**
* 修改学生
* @param student
* @return
*/
@PostMapping("/update")
public Student update(Student student){
return studentService.save(student);
}
/**
* 删除学生
* @param id 要删除的学生id
* @return
*/
@GetMapping("/del/{id}")
public String del(@PathVariable int id){
studentService.delete(id);
return "yes";
}
@GetMapping("/findByName/{name}")
public List findByName(@PathVariable String name){
return studentService.findStuByName(name);
}
@GetMapping("/query")
public Page findByPage(Integer page, HttpServletResponse response){
response.setHeader("Access-Control-Allow-Origin","*");
if(page==null || page<=0){
page = 0;
}else{
page -= 1;
}
return studentService.findAll(page,5);
}
}
UserController
package com.kude.stu.kudestu.stu.controller;
import com.kude.stu.kudestu.stu.entity.User;
import com.kude.stu.kudestu.stu.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
/**
* 处理用户信息的控制层
* @author 潘亚
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
/**
* 查询用户的方法
*/
@RequestMapping("/findAll")
public List findAll(){
return userService.findAll();
}
/**
* 根据ID查询用户
*/
@RequestMapping("/query")
public User findById(int id){
return userService.findUserById(id);
}
/**
* 注册用户
*/
@RequestMapping(value = "/reg",method = RequestMethod.POST)
public User reg(User user){
return userService.save(user);
}
/**
* 用户登陆
*/
//@RequestMapping(value = "/login",method = RequestMethod.POST)
//public User login(String username,String password){
//return userService.login(username,password);
// }
/**
* 用户登陆
*/
@PostMapping("/login")
public User login(String username,String password){
return userService.login(username,password);
}
//这个分页还是没用判断好，如果页数p超过3以后，回返回全部是空值
//应对超越页码数的进行限制一下
/**
* 分页查询
*/
@RequestMapping("/page")
public Page findByPage(Integer p, HttpServletResponse response){
response.setHeader("Access-Control-Allow-Origin","*");
if(p==null || p<=0){
p = 0;
}else{
p-=1;
}
return userService.findByPage(p,2);
}
/**
* 修改
*/
@RequestMapping("/updata")
public User update(User user){
return userService.update(user);
}
/**
* 删除
*/
@RequestMapping("/del")
public String del(int id){
userService.delete(id);
return "yes";
}
}
StudentDao
package com.kude.stu.kudestu.stu.dao;
import com.kude.stu.kudestu.stu.entity.Student;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import java.util.List;
public interface StudentDao extends JpaRepository {
Student findStudentById(Integer id);
@Query(name = "findStuByName",nativeQuery = true,value =
"select * from student where name=:name")
List findStuByName(@Param("name") String name);
}
UserDao
package com.kude.stu.kudestu.stu.dao;
import com.kude.stu.kudestu.stu.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
public interface UserDao extends JpaRepository {
User findUserById(Integer id);
//@Query("select id,username,password from user where username=?1 and password=?2")
// User login(@Param("username") String username, @Param("password") String password);
//如何两个usernam或者password一样的User用户，回出现500错误
//这种方法不能用username或者password登入
@Query(name="login",nativeQuery = true,value =
"select * from user where username=:username and password=:password")
User login(@Param("username") String username, @Param("password") String password);
}
Student
package com.kude.stu.kudestu.stu.entity;
import javax.persistence.*;
@Entity
@Table(name = "student")
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String name;
private int age;
private String sex;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", sex='" + sex + '\'' +
'}';
}
public Student() {
}
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
User
package com.kude.stu.kudestu.stu.entity;
import javax.persistence.*;
@Entity
@Table(name = "user")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String username;
private String password;
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + 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;
}
public User() {
}
}
StudentService
package com.kude.stu.kudestu.stu.service;
import com.kude.stu.kudestu.stu.entity.Student;
import org.springframework.data.domain.Page;
import java.util.List;
public interface StudentService {
Student save(Student student);
Student update(Student student);
void delete(Integer sid);
Student findStuById(Integer id);
List findStuByName(String name);
/**
* 分页查询所有数据
* @param page 当前页
* @param pageSize 每页记录数
* @return
*/
Page findAll(int page,int pageSize);
}
StudentServicelmpl
package com.kude.stu.kudestu.stu.service;
import com.kude.stu.kudestu.stu.dao.StudentDao;
import com.kude.stu.kudestu.stu.entity.Student;
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.stereotype.Service;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentDao studentDao;
@Override
public Student save(Student student) {
return studentDao.save(student);
}
@Override
public Student update(Student student) {
return studentDao.save(student);
}
@Override
public void delete(Integer sid) {
studentDao.deleteById(sid);
}
@Override
public Student findStuById(Integer sid) {
return studentDao.findStudentById(sid);
}
@Override
public List findStuByName(String name) {
return studentDao.findStuByName(name);
}
@Override
public Page findAll(int page,int pageSize) {
Pageable pageable = PageRequest.of(page,pageSize);
return studentDao.findAll(pageable);
}
}
UserService
package com.kude.stu.kudestu.stu.service;
import com.kude.stu.kudestu.stu.entity.User;
import org.springframework.data.domain.Page;
import java.util.List;
public interface UserService {
List findAll();
User findUserById(Integer id);
User save(User user);
User update(User user);
void delete(int id);
User login(String username,String password);
Page findByPage(int page, int limit);
}
UserServicelmpl
package com.kude.stu.kudestu.stu.service;
import com.kude.stu.kudestu.stu.dao.UserDao;
import com.kude.stu.kudestu.stu.entity.User;
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.data.domain.Sort;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public List findAll() {
return userDao.findAll();
}
@Override
public User findUserById(Integer id) {
return userDao.findUserById(id);
}
@Override
public User save(User user) {
return userDao.save(user);
}
@Override
public User update(User user) {
return userDao.save(user);
}
@Override
public void delete(int id) {
userDao.deleteById(id);
}
@Override
public User login(String username, String password) {
return userDao.login(username,password);
}
@Override
public Page findByPage(int page, int pageSize) {
Pageable pageable = PageRequest.of(page,pageSize,new Sort(Sort.Direction.ASC,"id"));
return userDao.findAll(pageable);
}
}
想看前台代码，下篇博客见