乱码的处理方式：
1.数据库本身是否支持utf-8。即 数据库创建的时候，字符集是否选择了utf-8。
2.数据库链接（URL）是否加上了characterEncoding=GBK
3.页面上是否是utf-8的编码格式（共有三处）
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
4.struts.xml进行国际化配置
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="true" /> <!-- 国际化配置 --> <constant name="struts.i18n.encoding" value="UTF-8"></constant> <package name="default" namespace="/" extends="struts-default">
5.使用过滤器，加上request.setCharacterEncoding,response.setCharacterEncoding
package maya.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; import javax.servlet.annotation.WebFilter; /** * Servlet Filter implementation class CharacterEncoding */ @WebFilter("/CharacterEncoding") public class CharacterEncoding implements Filter { /** * Default constructor. */ public CharacterEncoding() { // TODO Auto-generated constructor stub } /** * @see Filter#destroy() */ public void destroy() { // TODO Auto-generated method stub } /** * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain) */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { //utf-8 request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); chain.doFilter(request, response); } /** * @see Filter#init(FilterConfig) */ public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub } }
web.xml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/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_9" version="2.4"> <display-name>Struts Blank</display-name> <filter> <filter-name>encoding</filter-name><!-- 过滤器别称，自定义 --> <filter-class>maya.util.CharacterEncoding</filter-class><!--指向过滤器的路径+类名--> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern><!-- 过滤所有页面 --> </filter-mapping>