[转载]基于spring3.0.5 mvc 简单用户管理实例

??? 临时应急做了两个月的ASP.NET，终于又回到Java上来了，还是Java感觉亲切啊。马上要开发一个新的项目，最近感觉spring mvc势头比较猛，就了解了一下，以前觉得spring mvc用起来较麻烦，所以一直用struts2，但了解了一下spring3 mvc，一下子就喜欢上了它，下个项目决定就用它了，RESTful URL、几乎0配置、不需要实现任何接口或继承任何类的Controller、方法级别的拦截，一个方法对应一个url、灵活的方法参数和返回值、多种view、处理ajax的请求更是方便...

?? 下面的小例子用了spring mvc和hibernate，只是简单的用户增删改查，没有用ajax，ajax的版本在这里：Spring3 MVC + jQuery easyUI 做的ajax版本用户管理(http://www.iteye.com/topic/1081739)，给和我一样准备用spring mvc的朋友参考一下吧。jar包如图：

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web.xml如下：<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><!-- 默认的spring配置文件是在WEB-INF下的applicationContext.xml --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><filter><filter-name>Set Character Encoding</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value><!-- 强制进行转码 --></init-param></filter><filter-mapping><filter-name>Set Character Encoding</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 默认所对应的配置文件是WEB-INF下的{servlet-name}-servlet.xml，这里便是：spring3-servlet.xml --><servlet><servlet-name>spring3</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>spring3</servlet-name><!-- 这里可以用 / 但不能用 /* ，拦截了所有请求会导致静态资源无法访问，所以要在spring3-servlet.xml中配置mvc:resources --><url-pattern>/</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>??applicationContext.xml如下：<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd" default-autowire="byName"><!-- 注意上面的default-autowire="byName"，如果没有这个声明那么HibernateDaoSupport中的sessionFactory不会被注入 --><!-- 约定优于配置，约定优于配置 --><bean id="dataSource" value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql://127.0.0.1:3306/test"></property><property name="username" value="root"></property><property name="password" value="root"></property></bean><bean id="sessionFactory" ref="dataSource"/> <property name="mappingDirectoryLocations"> <list><!-- 这里直接映射的pojo类所在的包，简单方便不用没次加一个pojo类都需要到这里来添加 --> <value>classpath:com/fsj/spring/model</value> </list> </property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.show_sql">true</prop></props></property></bean><!-- 自动扫描组件，这里要把web下面的 controller去除，他们是在spring3-servlet.xml中配置的，如果不去除会影响事务管理的。--><context:component-scan base-package="com.fsj.spring"><context:exclude-filter type="regex" expression="com.fsj.spring.web.*"/></context:component-scan><!-- 下面是配置声明式事务管理的，个人感觉比用注解管理事务要简单方便 --><bean id="txManager" ref="sessionFactory"></property></bean><aop:config><aop:advisor pointcut="execution(* com.fsj.spring.service.*Service.*(..))" advice-ref="txAdvice"/></aop:config><tx:advice id="txAdvice" transaction-manager="txManager"><tx:attributes><tx:method name="get*" read-only="true"/><tx:method name="query*" read-only="true"/><tx:method name="find*" read-only="true"/><tx:method name="load*" read-only="true"/><tx:method name="*" rollback-for="Exception"/></tx:attributes></tx:advice></beans>??spring3-servlet.xml如下：<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd" default-autowire="byName"><!-- 约定优于配置，约定优于配置 --><!-- 配置静态资源，直接映射到对应的文件夹，不被DispatcherServlet处理，3.04新增功能，需要重新设置spring-mvc-3.0.xsd --><mvc:resources mapping="/img/**" location="/img/"/><mvc:resources mapping="/js/**" location="/js/"/><mvc:resources mapping="/css/**" location="/css/"/><!-- 扫描所有的controller --><context:component-scan base-package="com.fsj.spring.web" /><!-- InternalResourceViewResolver默认的就是JstlView所以这里就不用配置viewClass了 --><bean value="/WEB-INF/view/"></property><property name="suffix" value=".jsp"></property></bean><!-- 启用基于注解的处理器映射，添加拦截器，类级别的处理器映射 --><bean value="0" /> <property name="webBindingInitializer"> <bean /> </property></bean></beans> ??log4j的就不贴出来了。两个HelloWorldController如下：package com.fsj.spring.web;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;/* * 不需要实现任何接口，也不需要继承任何的类 */@Controllerpublic class HelloWorldController {/** * 方法都可以接受的参数(参数数量和顺序没有限制)： HttpServletRequest,HttpServletResponse,HttpSession(session必须是可用的) ,PrintWriter,Map,Model,@PathVariable(任意多个)， @RequestParam（任意多个）， @CookieValue （任意多个），@RequestHeader，Object（pojo对象） ,BindingResult等等 * * 返回值可以是：String(视图名)，void（用于直接response），ModelAndView，Map ，Model，任意其它任意类型的对象（默认放入model中，名称即类型的首字母改成小写），视图名默认是请求路径 */@RequestMapping("/helloWorld")public ModelAndView helloWorld() {ModelAndView mav = new ModelAndView();mav.setViewName("login");mav.addObject("message", "Hello World!");return mav;}}? package com.fsj.spring.web;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.apache.commons.lang.StringUtils;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.fsj.spring.model.TDept;import com.fsj.spring.model.TUser;import com.fsj.spring.service.IDeptService;import com.fsj.spring.service.IUserService;import com.fsj.spring.util.Constants;@Controller@RequestMapping("/user")public class UserController {private IUserService userService;private IDeptService deptService;public IDeptService getDeptService() {return deptService;}public void setDeptService(IDeptService deptService) {this.deptService = deptService;}public IUserService getUserService() {return userService;}public void setUserService(IUserService userService) {this.userService = userService;}@RequestMapping(value="/login",method=RequestMethod.POST)public String login(@RequestParam String name,@RequestParam String password,Model model,HttpServletRequest request) throws Exception{TUser user1 = userService.getUserByName(name);if(user1 == null) {model.addAttribute("message", "用户不存在");return "login";}else if(password == null || !password.equals(user1.getPassword()) ){model.addAttribute("message", "密码错误");return "login";}else {request.getSession().setAttribute(Constants.USER_INFO_SESSION, user1);return "welcome";}}@RequestMapping(value="/login1",method=RequestMethod.POST)public String login1(TUser user,HttpServletRequest request,Model model) throws Exception{TUser user1 = userService.getUserByName(user.getName());if(user1 == null) {model.addAttribute("message", "用户不存在");return "login";}else if(user.getPassword() == null || !user.getPassword().equals(user1.getPassword()) ){model.addAttribute("message", "密码错误");return "login";}else {request.getSession().setAttribute(Constants.USER_INFO_SESSION, user1);return "welcome";}}@RequestMapping(value="/list")public String list(Model model,HttpServletRequest request) throws Exception {List<TUser> userList = userService.getUserList();model.addAttribute("userList", userList);List<TDept> deptList = deptService.getDeptList();model.addAttribute("deptList", deptList);if(StringUtils.isNotBlank(request.getParameter("resMess")) && StringUtils.isNotBlank(request.getParameter("opeMess"))) {model.addAttribute("message",setOperateMessage(request.getParameter("resMess"),request.getParameter("opeMess"),"用户"));}return "user/list";}private String setOperateMessage(String resMess,String opeMess,String modMess) {//TODO 以后可以和写日志结合在一起String ope = "";String res = "";if(Constants.OPERATE_TYPE_ADD.equals(opeMess)) {ope = "增加";}else if(Constants.OPERATE_TYPE_UPDATE.equals(opeMess)) {ope = "更新";}else if(Constants.OPERATE_TYPE_DELETE.equals(opeMess)) {ope = "删除";}if(Constants.RESULT_SUCCESS.equals(resMess)) {res = "成功";}else if(Constants.RESULT_FAILED.equals(resMess)) {res = "失败";}return ope + modMess + res;}/* * 同样的请求路径 user/add 如果是get请求就转到增加页面去，如果是post请求就做add操作 */@RequestMapping(value="/add",method=RequestMethod.GET)public String toAdd(Model model) throws Exception{List<TDept> deptList = deptService.getDeptList();model.addAttribute("deptList", deptList);return "user/add";}@RequestMapping(value="/add",method=RequestMethod.POST)public String doAdd(TUser user,Model model) throws Exception{try {userService.addUser(user);model.addAttribute("resMess", Constants.RESULT_SUCCESS);} catch (Exception e) {e.printStackTrace();model.addAttribute("resMess", Constants.RESULT_FAILED);throw e;}model.addAttribute("opeMess", Constants.OPERATE_TYPE_ADD);//重定向，防止重复提交，当然这样不能完全解决重复提交的问题，只是简单处理一下，若要较好的防止重复提交可以结合token做，//以“/”开关，相对于当前项目根路径，不以“/”开关，相对于当前路径//return "redirect:/user/list"; return "redirect:list"; }/* * Restful模式路径： * 注意这里/update/{id}和@PathVariable("id")中id要一致，这样不管用debug模式还是release模式编译都没问题 * 也可以简写成@PathVariable int id，但这样只能以debug模式编译的时候正确，如果用release编译就不正确了，因为如果用release模式编译会把参数的名字改变的 * 一般IDE工具都是以debug模式编译的，javac是以release模式编译的 * 同样的请求路径 user/update 如果是get请求就转到增加页面去，如果是post请求就做update操作 */@RequestMapping(value="/update/{id}",method=RequestMethod.GET)public String toUpdate(@PathVariable("id") int id, Model model) throws Exception{model.addAttribute("user",userService.getUserById(id));model.addAttribute("deptList", deptService.getDeptList());return "user/update";}@RequestMapping(value="/update/{id}",method=RequestMethod.POST)public String doUpdate(@PathVariable("id") int id, TUser user,Model model) throws Exception{try {userService.updateUser(user);model.addAttribute("resMess", Constants.RESULT_SUCCESS);} catch (Exception e) {e.printStackTrace();model.addAttribute("resMess", Constants.RESULT_FAILED);throw e;}model.addAttribute("opeMess", Constants.OPERATE_TYPE_UPDATE);//return "redirect:../list"; //重定向，防止重复提交，以“/”开关，相对于当前项目根路径，不以“/”开关，相对于当前路径return "redirect:/user/list"; }@RequestMapping(value="/delete/{id}")public String delete(@PathVariable("id") int id,Model model)throws Exception{try {userService.deleteUser(id);model.addAttribute("resMess", Constants.RESULT_SUCCESS);} catch (Exception e) {e.printStackTrace();model.addAttribute("resMess", Constants.RESULT_FAILED);throw e;}model.addAttribute("opeMess", Constants.OPERATE_TYPE_DELETE);return "redirect:/user/list";//重定向}}??下面的例子中没有jar包，jar太大了超过10M了，请自己加jar包

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