java中文乱码问题

    在java中提供了两个类，java.net.URLEncoder和java.net.URLDecoder，java.net.URLEncoder.encode(String s, String enc)用于对字符串进行编码，java.net.URLDecoder.decode(String s, String enc)用于对字符串进行解码，综合运用这两个方法，即可解决java中的中文乱码问题！

 

Demo:

package com.test.action;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;

import com.opensymphony.xwork2.ActionSupport;

public class Test2Action extends ActionSupport {
	private static final long serialVersionUID = 7006788055764049778L;
	private String username;
	
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	@Action(
			value="test2",
			results={
					@Result(name=ActionSupport.SUCCESS,type="redirectAction",
							location="test3",params={"username","${username}"})
			}
	)
	public String test2(){
		System.out.println(this.username);
		try {
			this.username = URLEncoder.encode(this.username, "UTF-8");   //对username编码
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return ActionSupport.SUCCESS;
	}
	
	@Action(
			value="test3",
			results={
					@Result(name=ActionSupport.SUCCESS,location="/test3.jsp")
			}
	)
	public String test3(){
		try {
			this.username = URLDecoder.decode(this.username, "UTF-8");   //对username解码
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		System.out.println(this.username);
		return ActionSupport.SUCCESS;
	}
}