SpringMVC学习三
基于SpringMVC实现简单用户管理
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" 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_3_0.xsd"> <display-name></display-name> <!-- 配置org.springframework.web.filer.HiddenHttpMethodFilter:可以把POST请求转为DELETE或POST请求 --> <filter> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <!-- 过滤所有请求 --> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 配置DispatcherServlet --> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置 DispatcherServlet的一个初始化参数:配置SpringMvc 配置文件的位置和名称--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <!-- 也可以不通过contextConfigLocation 来配置SpringMvc的配置文件，而使用默认的 默认的配置文件为：/WEB-INF/<servlet-name>-servlet.xml /WEB-INF/springDispatcherServlet-servlet.xml --> <!-- 设置启动 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <!-- 请求处理 --> <servlet-name>springDispatcherServlet</servlet-name> <!-- /:应答所有请求 --> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
springmvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/tx/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> <!-- 配置自定义扫描包 --> <context:component-scan base-package="como.springmvc.handlers"></context:component-scan> <!-- 配置视图解析器：如何把handler方法返回值解析为实际的物理视图 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- spring中加入jstl标签库 --> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <!-- 前缀 --> <property name="prefix" value="/WEB-INF/views/"></property> <!-- 后缀 --> <property name="suffix" value=".jsp"></property> </bean> </beans>
User.java
package com.springmvc.entity; public class User { private String username; private String password; private String email; private int age; public User(String username,String password,String email,int age) { this.username=username; this.password=password; this.email=email; this.age=age; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } 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; } @Override public String toString() { return "User [username=" + username + ", password=" + password + ", email=" + email + ", age=" + age + "]"; } }
UserController.java
package com.springmvc.controller; import java.util.HashMap; import java.util.Map; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import com.springmvc.entity.User; @Controller @RequestMapping("/user") public class UserController { private Map<String,User> users = new HashMap<String,User>(); //创建构造函数 public UserController(){ //给users里添加属性 users.put("sddy", new User("sddy","123","123@123",15)); users.put("sdy", new User("sdy","1234","123@12",15)); users.put("ddy", new User("ddy","23","123@123",15)); users.put("sdd", new User("sddy","12","123@123",15)); } @RequestMapping(value="/users",method=RequestMethod.GET) public String List(Model model){ model.addAttribute("users",users);//传值给jsp页面,第一个users为jsp中items的users return "user/list"; } //链接到add页面是get请求，访问此代码 @RequestMapping(value="/add",method=RequestMethod.GET) public String add(Model model){ model.addAttribute(new User()); //服务器端跳转forword return "user/add"; } //重载,在添加用户时，是post请求，访问此代码 @RequestMapping(value="/add",method=RequestMethod.POST) public String add(User user){ users.put(user.getUsername(), user); //客户端跳转 return "redirect:/user/users"; } }
list.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>用户列表</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <a href="add">添加</a> <c:foreach items="${users}" var="um"> ${um.value.username} ---${um.value.password} ---${um.value.email} ---${um.value.age} </c:foreach> </body> </html>
add.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib prefix="sf" uri="http://www.springframework.org/tags/form" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'add.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <!-- 自动把表单的值添加到user中 --> <sf:form method="post" modelAttribute="user"> Username：<sf:input path="usename"/><br> Password:<sf:password path="password"/><br> Email:<sf:input path="email"/><br> Age:<sf:input path="age"/><br> <input type="submit" value="add"/> </sf:form> </body> </html>
