SpringMVC学习第三天
1.登陆页面的实现
2.异常的处理
3.静态文件的处理
login.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> 用户列表</title > </head> <body> <form action="user/login" method="post" > 用户名: <input type="text" name="userName" /><br/> 密码: <input type="password" name="password" /><br /> <input type="submit" value="登陆"/> </form > </body> </html>
UserController
package controller;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import model.User;
import model.UserException;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/user" )
public class UserController
{
private Map<String,User> users = new HashMap<String,User>();
public UserController() {
users.put("haha" ,new User("haha","haha" ,"哈哈" ,"sss" ));
users.put("hehe" ,new User("hehe","hehe" ,"呵呵 " ,"sss" ));
users.put("nimei" ,new User("nimei","nimei" ,"你妹" ,"sss" ));
users.put("zhangquandan" ,new User("zhangquandan" ,"张全蛋" ,"哈哈" ,"sss" ));
}
/**
* 遍历用户
* @param model
* @return
*/
@RequestMapping(value= "/users",method=RequestMethod.GET)
public String list(Model model){
model.addAttribute("users" ,users );
return "user/list" ;
}
//链接到add页面时是GET请求，会访问这段代码
// @RequestMapping(value="/add",method=RequestMethod.GET)
// public String add(Model model){
// //开启modelDriven
// model.addAttribute(new User());
// return "user/add";
// }
/**
* 进入添加页面
* @param user
* @return
*/
@RequestMapping(value= "/add",method=RequestMethod.GET)
public String add( @ModelAttribute("user" ) User user){
return "user/add" ;
}
/**
* 添加用户
* @param user
* @param br
* @return
*/
//在具体添加用户时，是post请求时，就访问以下代码
@RequestMapping(value= "/add",method=RequestMethod.POST)
public String add( @Validated User user,BindingResult br ){//一定要紧跟validated之后写验证结果类
if(br .hasErrors())
{
//如果有错误直接返回页面
return "user/add" ;
}
users.put(user .getUserName(), user);
//UrlBasedViewResolver接口
return "redirect:/user/users" ;
}
/**
* 查看用户详细信息
* @param userName
* @param model
* @return
*/
@RequestMapping(value= "/{userName}",method=RequestMethod.GET)
public String show( @PathVariable String userName,Model model )
{
model.addAttribute(users .get(userName));
return "user/show" ;
}
/**
* 进入修改页面
* @param userName
* @param model
* @return
*/
@RequestMapping(value= "/{userName}/update",method=RequestMethod.GET)
public String update( @PathVariable String userName,Model model )
{
model.addAttribute(users .get(userName));
return "user/update" ;
}
/**
* 修改用户数据
* @param user
* @param userName
* @param br
* @return
*/
@RequestMapping(value= "/{userName}/update",method=RequestMethod.POST)
public String udpate( @PathVariable String userName,@Validated User user,BindingResult br)
{
if(br .hasErrors())
{
return "user/update" ;
}
users.put(userName ,user );
return "redirect:/user/users" ;
}
@RequestMapping(value= "/{userName}/delete",method=RequestMethod.GET)
public String delete( @PathVariable String userName)
{
users.remove(userName );
return "redirect:/user/users" ;
}
@RequestMapping(value= "/login",method=RequestMethod.POST)
public String login(String userName,String password,HttpSession session )
{
if(!users .containsKey(userName))
{
throw new UserException("用户名不存在 ");
}
User u = users.get(userName );
if(!u .getPassword().equals(password))
{
throw new UserException("用户密码不正确");
}
session.setAttribute("loginUser" , u );
return "redirect:/user/users" ;
}
/**
* 局部异常处理,仅仅只能处理这个控制器的中的异常
*
*/ /*
@ExceptionHandler(value={UserException.class})
public String handlerException(UserException e,HttpServletRequest request)
{
request.setAttribute("e", e);
return "user/error";
}*/
}
UserException
package model;
public class UserException extends RuntimeException
{
/**
*
*/
private static final long serialVersionUID = 1L;
public UserException() {
super();
// TODO Auto-generated constructor stub
}
public UserException(String message, Throwable cause,
boolean enableSuppression , boolean writableStackTrace) {
super(message , cause , enableSuppression , writableStackTrace);
// TODO Auto-generated constructor stub
}
public UserException(String message , Throwable cause) {
super(message , cause );
// TODO Auto-generated constructor stub
}
public UserException(String message) {
super(message );
// TODO Auto-generated constructor stub
}
public UserException(Throwable cause) {
super(cause );
// TODO Auto-generated constructor stub
}
}
User
package model;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
public class User
{
private String userName;
private String password;
private String nickName;
private String email;
@NotEmpty(message= "用户名不能为空" )
public String getUserName() {
return userName ;
}
public void setUserName(String userName ) {
this.userName = userName;
}
@Size(min=1,max=10,message= "密码的长度应该在1和10之间" )
public String getPassword() {
return password ;
}
public void setPassword(String password ) {
this.password = password;
}
public String getNickName() {
return nickName ;
}
public void setNickName(String nickName ) {
this.nickName = nickName;
}
@Email(message= "邮箱的格式不正确" )
public String getEmail() {
return email ;
}
public void setEmail(String email ) {
this.email = email;
}
public User() {
}
public User(String userName, String password , String nickName, String email ) {
this.userName = userName;
this.password = password;
this.nickName = nickName;
this.email = email;
}
}
error.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></ title>
</head>
<body>
<h1 >${e.message }</ h1>
</body>
</html>
error1.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8"
pageEncoding="utf-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></ title>
</head>
<body>
<h1 >${exception }</ h1>
</body>
</html>
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" %>
<!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> 用户列表</title >
<link rel="stylesheet" href=" <%=request.getContextPath() %>/resources/css/main.css" type="text/css" >
</head>
<body>
<a href="add" >添加</ a>-->${loginUser.userName }
<br/>
<c:forEach var="user" items=" ${users }">
${user.value.userName } --
${user.value.password } --
<a href=" ${user.value.userName }">${user.value.nickName } </a> --
${user.value.email }
<a href=" ${user.value.userName }/update">修改 </a>
<a href=" ${user.value.userName }/delete">删除 </a>
<br/>
</c:forEach >
</body>
</html>
main.css
*{
font-size:15px ;
color:red;
}
spring-servlet.xml
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="controller" /> <mvc:annotation-driven /> <!-- 将静态文件指定到某个特殊文件夹中统一处理 --> <mvc:resources location= "/resources/" mapping="/resources/**" ></mvc:resources> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean > <!-- 全局异常处理 --> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver" > <property name="exceptionMappings" > <props> <prop key="model.UserException" >user/error1</ prop> </props> </property> </bean > </beans>
源码:http://pan.baidu.com/s/1jGHuIRc