SpringMVC学习第四天
1.文件上传
UserController
package controller;
import java.io.File;
import java.io.IOException;
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.apache.commons.io.FileUtils;
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;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import com.sun.org.glassfish.gmbal.ParameterNames;
@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 上传单个文件
* @param user
* @param br
* @return
* @throws IOException
*/ /* Zxcvb同，ASDFGHK/ //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,MultipartFile image,HttpServletRequest request) throws IOException{//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";
}
String realPath = request.getSession().getServletContext().getRealPath("/resources/upload");
System.out.println(realPath);
File file = new File(realPath+"/"+image.getOriginalFilename());
FileUtils.copyInputStreamToFile(image.getInputStream(), file);
System.out.println(image.getName()+","+image.getOriginalFilename()+","+image.getContentType());
users.put(user.getUserName(), user);
//UrlBasedViewResolver接口
return "redirect:/user/users";
}*/
/**
* 添加用户 上传多个文件
* @param user
* @param br
* @return
* @throws IOException
*/
//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 ,@RequestParam ("images" ) MultipartFile[] images,HttpServletRequest request ) throws IOException{//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" ;
}
String realPath = request.getSession().getServletContext().getRealPath("/resources/upload");
System. out.println(realPath );
for(MultipartFile image : images)
{
if(image .isEmpty())
{
continue;
}
File file = new File(realPath+"/" +image .getOriginalFilename());
FileUtils. copyInputStreamToFile(image.getInputStream(), file);
}
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";
}*/
}
add.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8" pageEncoding="utf-8" %> <!-- the form tag --> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!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> <!-- 此时没有写action,直接提交会提交给/add --> <form:form method="post" modelAttribute="user" enctype="multipart/form-data" > 用户名: <form:input path="userName" /><form:errors path="userName" ></form:errors>< br/> 密码: <form:password path="password" /><form:errors path="password" ></form:errors>< br/> 真实姓名: <form:input path="nickName" /><br/> Email: <form:input path="email" /><form:errors path="email" ></form:errors>< br/> <!--单个文件上传 image<input type="file" name="image"/><br/> --> image <input type="file" name="images" /><br/> image <input type="file" name="images" /><br/> <input type="submit" value="添加用户"> </form:form > </body> </html>
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> <!-- 设置multipartResolver才能完成文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" > <property name="maxUploadSize" value="5000000" ></property> </bean > <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/1gdw2fvX