入门eclipse+springboot+Mysql+jpa操作CRUD实例
公司项目转java开发，写了个java操作MySql例子，IDE使用的是eclipse最新版本(并且免费)，java流行的框架挺多，之前用过SSH框架，最近研究下springboot框架，发现比SSH方便了许多，下面是我的操作源码及截图。
- 项目结构
- application类
package com.howdy;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@SpringBootApplication (exclude = {DataSourceAutoConfiguration.class})
@EnableAutoConfiguration
@EnableJpaRepositories
public class StartApp {
public static void main(String[] args) {
SpringApplication.run(StartApp.class, args);
}
}- 实体类
package com.howdy.entity;
import java.util.Date;
import javax.persistence.*;
@Entity
public class T_Cod_SchoolData {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int id;
public String sName;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
private String getsName() {
return sName;
}
public void setsName(String sName) {
this.sName = sName;
}
public int getSchIdentity() {
return schIdentity;
}
public void setSchIdentity(int schIdentity) {
this.schIdentity = schIdentity;
}
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province = province;
}
public String getEduLevel() {
return eduLevel;
}
public void setEduLevel(String eduLevel) {
this.eduLevel = eduLevel;
}
public int getQqrdpm() {
return qqrdpm;
}
public void setQqrdpm(int qqrdpm) {
this.qqrdpm = qqrdpm;
}
public String getLbrdpm() {
return lbrdpm;
}
public void setLbrdpm(String lbrdpm) {
this.lbrdpm = lbrdpm;
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
private int schIdentity;
private String province;
private String eduLevel;
private int qqrdpm;
private String lbrdpm;
private Date createtime;
}
- dao类，实现jpa接口
package com.howdy.dao;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.howdy.entity.T_Cod_SchoolData;
@Repository
public interface T_Cod_SchoolDao extends JpaRepository {
}
- services类
package com.howdy.services;
import java.util.List;
import java.util.Optional;
import javax.annotation.Resource;
import javax.transaction.Transactional;
import org.springframework.stereotype.Service;
import com.howdy.dao.T_Cod_SchoolDao;
import com.howdy.entity.*;
@Service
public class T_Cod_SchoolService {
@Resource
private T_Cod_SchoolDao schoolDao;
/**
* save,update ,delete 方法需要绑定事务. 使用@Transactional进行事务的绑定.
*
* @param User
* 保存对象
*/
@Transactional
public boolean ExistsById(Integer id)
{
return schoolDao.existsById(id);
}
/**
* 获取列表
* */
public List list() {
return schoolDao.findAll();
}
@Transactional
public void save(T_Cod_SchoolData model) {
schoolDao.save(model);
}
// //@Transactional
//
// public T_Cod_SchoolDataModel update(T_Cod_SchoolData model)
// {
// schoolDao.(model);
// }
@Transactional
public void delete(T_Cod_SchoolData model) {
schoolDao.delete(model);
}
}
- 控制类
package com.howdy.api;
import java.util.Date;
import java.util.List;
import java.text.SimpleDateFormat;
import javax.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonArrayFormatVisitor;
import com.howdy.entity.T_Cod_SchoolData;
import com.howdy.services.T_Cod_SchoolService;
import net.sf.json.JSONArray;
@RestController
public class CodSchoolController {
@Autowired
private T_Cod_SchoolService schoolService;
@GetMapping(value = "/getId")
public String getByName() {
int Id;
boolean b = schoolService.ExistsById(1);
if (b) {
return "The id is exist.";
}
return "user id is not exist.";
}
@GetMapping(value = "/list")
public String getList() {
List lst = schoolService.list();
if (lst != null && lst.size() > 0) {
JSONArray jsonArray = JSONArray.fromObject(lst);// 将取到的lst对应的(一组)值字符串转换为JSONArray
// 将取到的cartypes对应的(一组)值字符串转换为JSONArray
return jsonArray.toString();
}
return "";
}
@GetMapping("/save")
public String save() {
try {
T_Cod_SchoolData model = new T_Cod_SchoolData();
model.setsName("李四");
// SimpleDateFormat sdFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
model.setProvince("上海");
model.setCreatetime(new Date());
schoolService.save(model);
} catch (Exception e) {
// TODO: handle exception
throw e;
} finally {
return "save success.";
}
}
@RequestMapping("/delete/{id}")
public String delete() {
try {
T_Cod_SchoolData model = new T_Cod_SchoolData();
model.setId(1);
schoolService.delete(model);
} catch (Exception e) {
throw e;
} finally {
return "执行了删除操作!";
}
}
}
- 属性配置
spring.datasource.url=jdbc:mysql://10.0.2.124:3306/spider?characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=hengfeng
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- pom.xml配置
4.0.0
com.howdy
sprbootdemo
0.0.1-SNAPSHOT
jar
sprbootdemo
Demo project for Spring Boot
org.springframework.boot
spring-boot-starter-parent
2.0.4.RELEASE
UTF-8
UTF-8
1.8
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-data-jpa
org.hibernate
hibernate-entitymanager
org.hibernate
hibernate-core
org.hibernate
hibernate-core
5.2.10.Final
org.springframework.boot
spring-boot-starter-test
test
mysql
mysql-connector-java
org.springframework.boot
spring-boot-starter-cache
net.sf.json-lib
json-lib
2.4
jdk15
org.springframework.boot
spring-boot-maven-plugin
- 源码下载地址https://download.csdn.net/download/haojuntu/10606158