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先做个例子：在页面输入数据传递到Controller处理，再返回到页面显示数据．

１.Controller类

@Controller@RequestMapping("/user")public class UserController {	@RequestMapping("/addUser")	public String addUser(String name, String age, HttpServletRequest request){		request.setAttribute("result", "addUser-----");		System.out.println("name=" + name);		request.setAttribute("result", name);		return "annotation";	}	@RequestMapping("/delUser")	public String delUser(HttpServletRequest request){		request.setAttribute("result", "delUser-----");		return "annotation";	}		@RequestMapping("/toUser")	public String toUser(HttpServletRequest request){		request.setAttribute("result", "toUser-----");		return "adduserView";	}}

２.adduserView.jsp　输入数据页面．

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>             	
   
    		姓名：
    
    
		年龄：
    
    
		
    	
   
  

这里先以get方式请求吧，把document.form[0].method="post"改为document.form[0].method="get"

３.显示数据页面 annotatio.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>                   	
   
    spring mvc学习笔记之注解开启
   
	
   
    		${result }	
   
  

４.部署测试，输入中文字符串，页面显示乱码

get方式传递参数造成的乱码可这样修改：

Tomcat下的server.xml

添加了一个URIEncoding="UTF-8"

５.Post方式传递数据乱码解决．

@RequestMapping("/addUser")	public String addUser(String name, String age, HttpServletRequest request){		request.setAttribute("result", "addUser-----");		try {			name = new String(name.getBytes("iso-8859-1"),"UTF-8");		} catch (UnsupportedEncodingException e) {		}		System.out.println("name=" + name);		request.setAttribute("result", name);		return "annotation";	}

这样解决未免太过复杂．

还有一种方式，通过在web.xml添加一个过滤器，对所有传递的数据进行一次编码转换

           
    
     Character Encoding
            
    
     org.springframework.web.filter.CharacterEncodingFilter
            
                
     
      encoding
                 
     
      UTF-8
             
        
       
           
    
     Character Encoding
            
    
     /*
        
   

这是spirngmvc自带的过滤器．

又在网上看到更好的方式解决这个问题，如果还在web.xml中加入过滤器，那请求就被拦截了两次，不太好，可以合并成一个拦截．

继承DispactcherServlet，修改编码方式：

package com.skymr.mvc;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.DispatcherServlet;public class EncodingDispatcherServlet extends DispatcherServlet{	protected String encoding;		@Override	protected void doService(HttpServletRequest request,			HttpServletResponse response) throws Exception {		request.setCharacterEncoding(encoding);		super.doService(request, response);	}	@Override	public void init(ServletConfig config) throws ServletException {		encoding = config.getInitParameter("encoding");		super.init(config);	}}

将web.xml中的springmvc的servlet改这个servlet，并设置参数encoding 为utf-8

             
    
     springMVC
              
    
     com.skymr.mvc.EncodingDispatcherServlet
              
            	
     
      contextConfigLocation
             	
     
      classpath*:/config/spring_annotation-servlet.xml
             
            
            	
     
      encoding
             	
     
      UTF-8
             
            
    
     1
          
         
             
    
     springMVC
              
    
     /
          
   

６.传递实体数据

实体类

package com.skymr.mvc.entity;public class User {	private String name;		private int age;	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public int getAge() {		return age;	}	public void setAge(int age) {		this.age = age;	}		}

Controller类修改

@RequestMapping("/addUser")	public String addUser(User user, HttpServletRequest request){		request.setAttribute("result", "addUser-----");		System.out.println("name=" + user.getName());		request.setAttribute("user", user);		return "annotation";	}

显示

   
    spring mvc学习笔记之数据传递
   
	
   
    		${user.name },${user.age }	
   

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