spring springmvc jpa整合

github：https://github.com/leelun/ssjpa.git

1 配置项目需要依赖包（pom.xml）

	4.0.0
	com.newland
	ssjpa
	war
	0.0.1-SNAPSHOT
	ssjpa Maven Webapp
	http://maven.apache.org
	
		
			junit
			junit
			3.8.1
			test
		
		
		
			javax.servlet
			javax.servlet-api
			3.1.0
			provided
		
		
			org.springframework
			spring-webmvc
			4.3.7.RELEASE
		

		
		
		
			org.springframework
			spring-jdbc
			4.3.7.RELEASE
		

		
		
		
			org.springframework
			spring-test
			4.3.7.RELEASE
		


		
		
		
			org.springframework
			spring-aspects
			4.3.7.RELEASE
		
		
		
		
			org.springframework
			spring-orm
			4.3.7.RELEASE
		
		
		
		
			c3p0
			c3p0
			0.9.1
		
		
		
			org.hibernate
			hibernate-core
			4.3.0.Final
		
		
		
			org.hibernate
			hibernate-entitymanager
			4.3.0.Final
		
		
		
			org.hibernate
			hibernate-c3p0
			4.3.0.Final
		
		
		
			mysql
			mysql-connector-java
			5.1.41
		
		
			com.fasterxml.jackson.core
			jackson-databind
			2.8.8
		
	
	
		ssjpa
	

2 web.xml配置

	Archetype Created Web Application
	
		contextConfigLocation
		classpath:applicationContext.xml
	
	
		org.springframework.web.context.ContextLoaderListener
	

	
		spring
		org.springframework.web.servlet.DispatcherServlet
		

			contextConfigLocation

			classpath:spring-servlet.xml

		

		1
	
	
		spring
		/
	

3 springmvc配置文件spring-servlet.xml配置

4 spring配置文件applicationContext.xml配置

	
	
		
	

	
	
	
	
		
		
		
		
	
	
	
		
		
		
			
			
		
		
		
		
			
				true
				true
				update
			
		
	
	
	
	
			
	
	
	
	

5 entity

package com.newland.jpa.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Table(name="JPA_PERSONS")
@Entity
public class Person {

	private Integer id;
	private String lastName;

	private String email;
	private int age;

	@GeneratedValue
	@Id
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	@Column(name="LAST_NAME")
	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
}

6 dao数据库数据获取

package com.newland.jpa.dao;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.springframework.stereotype.Repository;

import com.newland.jpa.entity.Person;

@Repository
public class PersonDao {

	//通过 @PersistenceContext 注解来标记成员变量!
	@PersistenceContext
	private EntityManager entityManager;

	@SuppressWarnings("unchecked")
	public List getPersons() {
		return (List) entityManager.createQuery("SELECT p  FROM Person p").getResultList();
	}

}

7 service业务处理

package com.newland.jpa.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.newland.jpa.dao.PersonDao;
import com.newland.jpa.entity.Person;

@Service
public class PersonService {
	
	@Autowired
	private PersonDao personDao;
	
	public List getPersons(){
		return personDao.getPersons();
	}
	
}

8 controller请求处理

package com.newland.jpa.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.newland.jpa.entity.Person;
import com.newland.jpa.service.PersonService;

@Controller
public class PersonController {
	@Autowired
	private PersonService personService;

	@ResponseBody
	@RequestMapping("/persons")
	public List persons() {
		return personService.getPersons();
	}
}

github：https://github.com/leelun/ssjpa.git​​​​​​​