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
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