SpringMVC学习第五天
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.bind.annotation.ResponseBody;
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
*/ /*
//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" ;
}
json的代码
@RequestMapping(value= "/{userName}",method=RequestMethod.GET,params="json")
@ResponseBody
public User show( @PathVariable String userName )
{
return users .get(userName);
}
/**
* 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";
}*/
}
架包
jackjson包：
http://pan.baidu.com/s/1mgDTboW
截图：
源码:
http://pan.baidu.com/s/1eQxkqKa