Java URL 中文乱码解决办法

一. 统一所有的编码格式（1）JSP页面设置：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>（2）设置编辑器默认的编码格式    例如，我的编辑器是myeclipse，全局编码设置的方法：ToolBar-->Window-->Preferences-->General-->Workspace-->Text file encoding局部编码设置：在源码按右键-->General-->Editors-->Test Editors-->Spelling-->Encoding，这里是设置单个文件的编码。二. 使用过滤器filter首先自己编写一个过滤器 package com.bigdata.util;   import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse;   public class CharacterEncodingFilter implements Filter{     protected FilterConfig filterConfig = null;     protected String encoding ="";     @Override     public void destroy() {         // TODO Auto-generated method stub         filterConfig = null;         encoding = null;     }       @Override     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,             FilterChain filterChain) throws IOException, ServletException {         // TODO Auto-generated method stub         if(encoding != null && !"".equals(encoding))             servletRequest.setCharacterEncoding(encoding);         filterChain.doFilter(servletRequest, servletResponse);     }       @Override     public void init(FilterConfig arg0) throws ServletException {         // TODO Auto-generated method stub         this.filterConfig = arg0;         this.encoding = filterConfig.getInitParameter("encoding");     }   }
接着，在web.xml中配置过滤器

<filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>com.bigdata.util.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
     </init-param>
   </filter>
    <filter-mapping>
      <filter-name>characterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>

三. 终极绝招

如果前两个方法试过之后，依然无法解决乱码问题，可以试试这个终极绝招

String str = new String(request.getParameter("something").getBytes("ISO-8859-1"),"utf-8")

但是网上都不推荐这种做法，不知道是什么原因，求大神解释！