跨应用服务器WEBLOGIC、TOMCAT编码问题(转)
[*]一、 描述
[*]项目编码一向做为系统设计级别难题，servlet2.4还未实现跨应用服务器编码支持，个应用服务器之间编码存在很大差异，因此导致部署不同应用服务器上会出现不同乱码问题。为了实现开发环境(tomcat)和生产环境(weblogic9.2)编码统一，特此实现WEB.XML配置FILTER过滤编码，经过多次测试，基本实现跨应用服务器编码统一。
[*]二、 配置（工程编码：UTF-8）
[*]1． 个人编码规范
[*]由于一些模块存在GET请求，在处理request.getParameter后出现乱码问题，一般个人实现方式为dwmc = new String(dwmc.getBytes("iso-8859-1"), "gb2312"); 此转码形式只适合一种应用服务器tomcat，为保证生产环境下weblogic能正常编码，需要：完全清理因个人书写而改变编码设置代码。并使用系统编码设置。
[*]2． 系统配置TOMCAT
[*]POST：系统web.xml中使用filter进行过滤POST请求，并其自动对其编码转换为utf-8。实现代码为
[*]request.setCharacterEncoding(encod);
[*]GET：filter过滤无法为TOMCAT进行GET编码转换，因此需要修改TOMCAT/CONF/ server.xml文件，在项目Connector标签下增加URIEncoding="GB2312"属性。
[*]3． 系统配置WEBLOGIC9.2
[*]POST与GET统一处理方式，使用FILTER进行处理。判断request.getContentType()空的时候则为GET 请求，处理如下：
[*]request.setCharacterEncoding(encod_wlc);
[*]response.setContentType("application/x-www-form-urlencoded;charset="+ encod_wlc);
[*]response.setCharacterEncoding(encod_wlc);
[*]encod_wlc：为配置参数，此处：GB2312
[*]POST请求则正常转换成utf-8即可，
[*]request.setCharacterEncoding(encod);
[*]三、 web.xml配置
[*] <filter>
[*] <filter-name>encodingFilter</filter-name>
[*] <filter-class>com.vstsoft.csi.util.SetCharacterEncodingFilter</filter-class>
[*] <init-param>
[*] <param-name>encoding</param-name>
[*] <param-value>UTF-8</param-value>//默认POST编码规则
[*] </init-param>
[*] <init-param>
[*] <param-name>encoding_wlc</param-name>
[*] <param-value>GB2312</param-value>//默认WEBLOGIC下GET编码规则
[*] </init-param>
[*] </filter>
[*] <filter-mapping>
[*] <filter-name>encodingFilter</filter-name>
[*] <url-pattern>*.do</url-pattern>
[*] </filter-mapping>
[*] <filter-mapping>
[*] <filter-name>encodingFilter</filter-name>
[*] <url-pattern>*.jsp</url-pattern>
[*]</filter-mapping>
[*]四、 JAVA文件
[*]package com.vstsoft.csi.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 SetCharacterEncodingFilter implements Filter {
[*] protected String encoding = null;
[*] protected String encoding_wlc = null;
[*] protected FilterConfig filterConfig = null;
[*] protected boolean ignore = true;
[*] public void destroy() {
[*] this.encoding = null;
[*] this.encoding_wlc=null;
[*] this.filterConfig = null;
[*] }
[*] public void doFilter(ServletRequest request, ServletResponse response,
[*] FilterChain chain) throws IOException, ServletException {
[*] if (ignore || (request.getCharacterEncoding() == null)) {
[*] String encod = selectEncoding(request);
[*] String encod_wlc = selectEncoding_wlc(request);
[*] if (request.getContentType() == null) {
[*] request.setCharacterEncoding(encod_wlc);
[*] response.setContentType("application/x-www-form-urlencoded; charset="+ encod_wlc);
[*] response.setCharacterEncoding(encod_wlc);
[*] } else {
[*] request.setCharacterEncoding(encod);
[*] }
[*] encod=null;
[*] encod_wlc=null;
[*] }
[*] chain.doFilter(request, response);
[*] }
[*] public void init(FilterConfig filterConfig) throws ServletException {
[*] this.filterConfig = filterConfig;
[*] this.encoding = filterConfig.getInitParameter("encoding");
[*] this.encoding_wlc = filterConfig.getInitParameter("encoding_wlc");
[*] String value = filterConfig.getInitParameter("ignore");
[*] System.out.println("======>编码过滤初始化, 默认POST请求编码: "+this.encoding+", WBL下GET请求编码: "+this.encoding_wlc+"<=====");
[*] 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);
[*] }
[*]
[*] protected String selectEncoding_wlc(ServletRequest request) {
[*] return (this.encoding_wlc);
[*] }
[*]}
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