java中的乱码问题

1如果使用的tomcat服务器,在server.xml中Connector 标签后加 URIEncoding="UTF-8";

2使用web过滤器:

(1)、新建一个SetCharacterEncodingFilter.java的类:

     
package com.util;
import java.io.IOException;
import javax.servlet.*;

public class SetCharacterEncodingFilter  implements Filter{
 protected String encoding = null;

 protected FilterConfig filterConfig = null;

 protected boolean ignore = true;

 public void destroy()
 {
    this.encoding = null;
    this.filterConfig = null;

 }

 public void doFilter(ServletRequest request, ServletResponse response,
     FilterChain chain) throws IOException, ServletException
 {
    if (ignore || (request.getCharacterEncoding() == null))
    {
     String encoding = selectEncoding(request);
     if (encoding != null)
      request.setCharacterEncoding(encoding);
    }
    chain.doFilter(request, response);
 }

 public void init(FilterConfig filterConfig) throws ServletException
 {
    this.filterConfig = filterConfig;
    // 获取初始化参数
    this.encoding = filterConfig.getInitParameter("encoding");
    String value = filterConfig.getInitParameter("ignore");
    if (value == null)
    {
     this.ignore = true;
    } else if (value.equalsIgnoreCase("true"))
    {
     this.ignore = true;
    } else if (value.equalsIgnoreCase("yes"))
    {
     this.ignore = true;
    } else
     this.ignore = false;
 }

 protected String selectEncoding(ServletRequest request)
 {
    return (this.encoding);
 }


}

(2)web.xml中在web-app里加入:

      <!--定义一个过滤器, 并设定其初始化参数--><filter>
   <filter-name>Set Character Encoding</filter-name>
   <filter-class>com.util.SetCharacterEncodingFilter</filter-class>
   <init-param>
    <param-name>encoding</param-name>
    <param-value>GB2312</param-value>
   </init-param>
</filter>
<!--制定过滤器映射-->
<filter-mapping>
   <filter-name>Set Character Encoding</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>

 

3.<%@ page language="java" import="java.util.*,com.scce.entity.*" pageEncoding="utf-8"%>

   <head>

  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

   </head>

4.String name=new String(request.getParameter("name").getBytes("ISO8859-1"),"GBK"); 

                       new String(fileName.getBytes("UTF-8"), "GBK")

5.request.setCharacterEncoding("gbk");

  response.setContentType("text/html;charset=gbk");

 

posted @ 2016-08-02 16:08  Sunny_star  阅读(138)  评论(0编辑  收藏  举报