Davis Coding Experience: Spring data jpa + hibernate + SpringMVC + MySQL 實現 CRUD

關於eclipse對於maven的介紹http://d12e493.blogspot.tw/search/label/Maven

關於SpringMVC的介紹http://d12e493.blogspot.tw/search/label/SpringMVC

此篇使用SpringMVC的架構

dao層則是spring data jpa及hibernate

簡單操作一個CRUD的例子，

專案建置如下：

User table schema

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(45) NOT NULL,
  `address` varchar(45) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

首先是pom.xml

<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 http://maven.apache.org/maven-v4_0_0.xsd">
 <modelVersion>4.0.0</modelVersion>
 <groupId>com.springdata</groupId>
 <artifactId>springData</artifactId>
 <packaging>war</packaging>
 <version>0.0.1-SNAPSHOT</version>
 <name>springData Maven Webapp</name>
 <url>http://maven.apache.org</url>
 <properties>
  <spring.version>3.2.2.RELEASE</spring.version>
  <hibernate.version>4.2.0.Final</hibernate.version>
  <spring-data.version>1.3.0.RELEASE</spring-data.version>
 </properties>
 <dependencies>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-beans</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-core</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-context-support</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-context</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-jdbc</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-orm</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-tx</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework.data</groupId>
   <artifactId>spring-data-jpa</artifactId>
   <version>${spring-data.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-web</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-webmvc</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>5.1.18</version>
  </dependency>
  <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>3.8.1</version>
   <scope>test</scope>
  </dependency>
  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-core</artifactId>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-entitymanager</artifactId>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupId>commons-dbcp</groupId>
   <artifactId>commons-dbcp</artifactId>
   <version>1.4</version>
  </dependency>
 </dependencies>
 <build>
  <finalName>springData</finalName>
 </build>
</project>

另外在web.xml中配置spring及springmvc，

包含applicationContext.xml及springmvc-servlet.xml，

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
 version="2.5">
 <display-name>Archetype Created Web Application</display-name>
 <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>/WEB-INF/classes/applicationContext.xml</param-value>
 </context-param>
 <listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>/WEB-INF/classes/springmvc-servlet.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
 </servlet-mapping>
</web-app>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
  http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
  http://www.springframework.org/schema/data/jpa
  http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
  http://www.springframework.org/schema/tx
  http://www.springframework.org/schema/tx/spring-tx.xsd">

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
  destroy-method="close">
  <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  <property name="url" value="jdbc:mysql://localhost/test" />
  <property name="username" value="root" />
  <property name="password" value="1234" />
 </bean>

 <bean id="entityManagerFactory"
  class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
  <property name="packagesToScan" value="com.springdata.model" />
  <property name="jpaProperties">
   <props>
    <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
    <prop key="hibernate.show_sql">true</prop>
    <prop key="hibernate.hbm2ddl.auto">update</prop>
   </props>
  </property>
 </bean>

 <bean id="hibernateJpaVendorAdapter"
  class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
  <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
 </bean>

 <jpa:repositories base-package="com.springdata.jpa"
  entity-manager-factory-ref="entityManagerFactory" />

 <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
  <property name="entityManagerFactory" ref="entityManagerFactory" />
 </bean>

 <tx:annotation-driven transaction-manager="transactionManager" />
</beans>

springmvc-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
        http://www.springframework.org/schema/beans    
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 <context:annotation-config />

 <context:component-scan base-package="com.springdata" />

 <bean
  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix">
   <value>/WEB-INF/pages/</value>
  </property>
  <property name="suffix">
   <value>.jsp</value>
  </property>
 </bean>
</beans>

User.java

package com.springdata.model;

import java.io.Serializable;

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

@Entity
@Table(name = "USER")
public class User implements Serializable {
 /**
  * 
  */
 private static final long serialVersionUID = 1L;
 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private int id;
 private String name;
 private String address;

 public int getId() {
  return id;
 }

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

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public String getAddress() {
  return address;
 }

 public void setAddress(String address) {
  this.address = address;
 }
}

UserRepository.java

package com.springdata.jpa;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.repository.CrudRepository;

import com.springdata.model.User;

public interface UserRepository extends JpaRepository<User, Integer>,
  CrudRepository<User, Integer> {
 public User findByName(String name);
}

接下來是UserService的interface，

可以注意以下loadUserByName方法的實作，

是使用JPA criteria API，

按照命名規則由spring data幫我們實作其中的細節，

可以參考官方文檔介紹http://docs.spring.io/spring-data/jpa/docs/1.6.0.RELEASE/reference/html/jpa.repositories.html

UserService.java

package com.springdata.service;

import java.util.List;

import com.springdata.model.User;

public interface UserService {
 public void saveUser(User user);

 public User loadUser(int id);
 
 public User loadUserByName(String name);

 public List<User> loadAll();

 public void deleteUser(int id);
}

UserServiceImpl.java

package com.springdata.service.impl;

import java.util.List;

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

import com.springdata.jpa.UserRepository;
import com.springdata.model.User;
import com.springdata.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService {
 @Autowired
 private UserRepository userRepository;

 @Override
 public void saveUser(User user) {
  userRepository.save(user);
 }

 @Override
 public User loadUser(int id) {
  return (User) userRepository.findOne(id);
 }

 @Override
 public List<User> loadAll() {
  List<User> list = userRepository.findAll();
  return list;
 }

 @Override
 public void deleteUser(int id) {
  userRepository.delete(id);
 }

 @Override
 public User loadUserByName(String name) {
  return userRepository.findByName(name);
 }

}

利用@Autowired自動裝配bean，

最後是UserController.java

package com.springdata.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.springdata.model.User;
import com.springdata.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {

 @Autowired
 private UserService userService;

 @RequestMapping("/init")
 public ModelAndView init() {
  ModelAndView model = new ModelAndView();
  model.setViewName("/user/add");
  return model;
 }

 @RequestMapping("/add")
 public String addUser(@ModelAttribute("user") User user) {
  userService.saveUser(user);
  return "forward:list ";
 }

 @RequestMapping("/list")
 public ModelAndView list() {
  ModelAndView model = new ModelAndView();

  List<User> list = userService.loadAll();
  model.addObject("userList", list);
  model.setViewName("/user/list");
  return model;

 }

 @RequestMapping("/del")
 public ModelAndView del(@RequestParam("id") int id) {
  ModelAndView model = new ModelAndView();
  try {
   userService.deleteUser(id);
   model.addObject("message", "delete success");
  } catch (Exception e) {
   model.addObject("message", "delete fail");
  }
  model.setViewName("forward:list");

  return model;
 }

 @RequestMapping("/edit")
 public ModelAndView edit(@RequestParam("id") int id) {
  ModelAndView model = new ModelAndView();

  User user = (User) userService.loadUser(id);
  model.addObject("user", user);
  model.setViewName("/user/edit");

  return model;
 }

 @RequestMapping("/query_name")
 public ModelAndView query_name(@RequestParam("name") String name) {
  ModelAndView model = new ModelAndView();

  User user = (User) userService.loadUserByName(name);
  model.addObject("user", user);
  model.setViewName("/user/edit");

  return model;
 }
}

接下來是view顯示層，

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function del_user(userId){
 document.getElementById("user_form").action="del";
 document.getElementById("id").value=userId;
 document.getElementById("user_form").submit();
};
function edit_user(userId){
 document.getElementById("user_form").action="edit";
 document.getElementById("id").value=userId;
 document.getElementById("user_form").submit();
};
</script>
</head>
<body>
 <input type="button" value="新增" onclick="location.href='init'">
 <form action="" id="user_form" method="POST">
  <table border="1">
   <tr>
    <th>ID</th>
    <th>Name</th>
    <th>Address</th>
    <th>操作</th>
   </tr>
   <c:if test="${not empty userList}">
    <c:forEach var="user" items="${userList}">
     <tr>
      <td>${user.id}</td>
      <td>${user.name }</td>
      <td>${user.address }</td>
      <td><input type="button" value="修改"
       onclick="edit_user(${user.id});"> <input type="button"
       value="刪除" onclick="del_user(${user.id});"></td>
     </tr>
    </c:forEach>
   </c:if>
   <input type="hidden" name="id" id="id" value="">
  </table>
 </form>
 <c:if test="${not empty message}">
  <p>${message }</p>
 </c:if>
 <form action="query_name" method="POST">
  <input type="text" name="name"> <input type="submit"
   value="query">
 </form>
</body>
</html>

add.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <form action="add" method="POST">
  <table border="1">
   <tr>
    <th>Name：</th>
    <td><input type="text" id="name" name="name"></td>
   </tr>
   <tr>
    <th>Address：</th>
    <td><input type="text" id="address" name="address"></td>
   </tr>
   <tr>
    <td><input type="submit" value="save"></td>
    <td><input type="reset" value="reset"></td>
   </tr>
  </table>
 </form>
</body>
</html>

edit.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <form action="add" method="POST">
  <table border="1">
   <tr>
    <th>Name：</th>
    <td><input type="hidden" id="id" name="id" value="${user.id} ">
     <input type="text" id="name" name="name" value="${user.name }"></td>
   </tr>
   <tr>
    <th>Address：</th>
    <td><input type="text" id="address" name="address"
     value="${user.address }"></td>
   </tr>
   <tr>
    <td><input type="submit" value="save"></td>
    <td><input type="button" value="back" onclick="history.back();"></td>
   </tr>
  </table>
 </form>
</body>
</html>

完整source code放在github
https://github.com/d12e493/spring-data

執行之後可在頁面上輸入http://localhost:8080/springData/user/list

新增頁面add.jsp

修改頁面edit.jsp

Davis Coding Experience

Navigator

2014年6月9日星期一

Spring data jpa + hibernate + SpringMVC + MySQL 實現 CRUD

此篇使用SpringMVC的架構

dao層則是spring data jpa及hibernate

1 則留言:

Navigator

2014年6月9日 星期一

Spring data jpa + hibernate + SpringMVC + MySQL 實現 CRUD

此篇使用SpringMVC的架構

dao層則是spring data jpa及hibernate

1 則留言:

2014年6月9日星期一