对于程序猿来讲,乱码问题真的很头疼,下面列举几种常见的乱码。php
解决方法:html
首先查看数据库编码,输入:java
show variables like "%char%";
确认编码一致,若是不一致,可输入:mysql
SET character_set_client='utf8'; SET character_set_connection='utf8'; SET character_set_results='utf8';
也可设置成gbk编码;web
也能够在安装Mysql目录下修改my.ini文件sql
default-character-set=utf-8
在myeclipse中jsp的默认编码为ISO-8859-8;数据库
只需在页面头部修改成swift
<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8" %>
在JSP页面头部加入下面这句话,告诉浏览器应该调用UTF-8的字符集。浏览器
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
在数据库链接时服务器
jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
若是使用框架链接则把头文件都修改为UTF-8编码便可
先变写一个过滤器
package com.oumyye.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 String encoding = null;
protected FilterConfig filterConfig = null;
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
if (encoding != null) {
request.setCharacterEncoding(encoding);
response.setContentType("text/html; charset="+encoding); } chain.doFilter(request, response); } public void destroy() { this.encoding = null; this.filterConfig = null; } }
在web.xml中配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>0001web</display-name> <!-- 中文编码过滤器 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>com.oumyye.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> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> </filter-mapping>
在表单中只能使用post传值,此方法对于get无效。
String newname=new String(name.getBytes("iso-8859-1"),"utf-8"))
附:JSP中的编码设置
1. pageEncoding:<%@ page pageEncoding=“UTF-8″%>
设 置JSP编译成Servlet时使用的编码
2. contentType: <%@ page contentType=“text/html; charset=UTF-8″%>
对服务器响应进行从新编码,即jsp的输出流在浏览器中显示的编码
3. html页面charset:<META http-equiv=“Content-Type” content=“text/html; charset=UTF-8″>
网页的编码信息 ,说明页面制做所使用的编码
4. request.setCharacterEncoding() — 可用在servlet和jsp页面中
做用是设置对客户端请求进行从新编码的编码,即post方式提交的数据进行编码。
5. response.setCharacterEncoding() — 可用在servlet和jsp页面中
对服务器响应进行从新编码,即jsp的输出流在浏览器中显示的编码,与<%@ page contentType=“text/html;charset=UTF-8″%>同样
6. response.setContentType() — 可用在servlet和jsp页面中
对服务器响应进行从新编码,即jsp的输出流在浏览器中显示的编码,与<%@ page contentType=“text/html;charset=UTF-8″%>同样
7.response.setHeader(“Content-Type”,”text/html;charset=UTF-8″); — 可用在servlet和jsp页面中
与<META http-equiv=“Content-Type” content=“text/html; charset=UTF-8″>同样