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如何配置Filter过滤器处理JSP中文乱码
参考Tomcat服务器目录webapps的examples示例
简单配置步骤:
1.在项目web.xml文件添加过滤器标记<filter>和<filter-mapping>;
2.实现过滤器代码;
3.对Tomcat服务器conf目录里的Server.xml文件配置URIEncoding;
4.前台页面设置contentType的charset值与web.xml里设置的值一致。
详细配置步骤:
1.配置web.xm文件,在web-app标签内添加过滤器的配置<filter>和<filter-mapping>
[html] view plaincopy
<!--中文乱码处理过滤-->
- <filter>
- <filter-name>EncodingFilter</filter-name><!--过滤器名称,自己起 -->
- <filter-class>com.filters.SetCharacterEncodingFilter</filter-class><!--过滤器类名称,包括包名一致、写全 -->
- <init-param><!--初始化参数,要指定的字符集编码 -->
- <param-name>encoding</param-name><!--参数名称 -->
- <param-value>GBK</param-value><!--参数值 -->
- </init-param>
- <init-param><!--初始化参数,指定是否忽略大小写 -->
- <param-name>ignore</param-name>
- <param-value>true</param-value>
- </init-param>
- </filter>
- <filter-mapping>
- <filter-name>EncodingFilter</filter-name>
- <url-pattern>/*</url-pattern> <!--“/*”表示项目下所有资源 -->
- </filter-mapping>
- <!--中文乱码处理过滤 -->
2.实现过滤器代码,创建一个SetCharacterEncodingFilter类
[java] view plaincopy
- package com.filters;
- 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;
- /**
- * 自定义字符处理过滤器
- * 参考自Tomcat目录webapps\examples\WEB-INF\classes\filters
- * @author coderlu
- * @since 2012-12-10
- */
- public class SetCharacterEncodingFilter implements Filter {
- protected FilterConfig filterConfig = null; //初始化配置
- protected String encoding = null; //接收字符编码
- protected boolean ignore = true; //是否忽略大小写
- /* 析构函数
- * @see javax.servlet.Filter#destroy()
- */
- @Override
- public void destroy() {
- this.encoding = null;
- this.filterConfig = null;
- }
- /* 执行过滤操作
- * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
- */
- @Override
- public void doFilter(ServletRequest request, ServletResponse response,
- FilterChain chain) throws IOException, ServletException {
- if (ignore || (request.getCharacterEncoding() == null)) {
- String encoding = selectEncoding(request); //如果为空先从web.xml中得到
- if (encoding != null){
- request.setCharacterEncoding(encoding); //设置字符集编码
- }
- }
- chain.doFilter(request, response);
- }
- /* 初始化过滤器
- * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
- */
- @Override
- public void init(FilterConfig filterConfig) throws ServletException {
- this.filterConfig = filterConfig;
- this.encoding = filterConfig.getInitParameter("encoding"); //从web.xml文件中读取encoding的值
- String value = http://www.mamicode.com/filterConfig.getInitParameter("ignore"); //从web.xml文件中读取ignore的值
- //以下三种情况均为忽略大小写
- if (value =http://www.mamicode.com/= null)
- this.ignore = true;
- else if (value.equalsIgnoreCase("true"))
- this.ignore = true;
- else if (value.equalsIgnoreCase("yes"))
- this.ignore = true;
- else
- this.ignore = false;
- }
- /**
- * 得到字符编码
- * @param request
- * @return
- */
- protected String selectEncoding(ServletRequest request) {
- return (this.encoding);
- }
- }
3.修改Tomcat服务器conf\Server.xml文件,加入一个URIEncoding="GBK"
[html] view plaincopy
- <!--URIEncoding 配置服务器反应编码集-->
- <Connector port="8080" protocol="HTTP/1.1"
- connectionTimeout="20000"
- redirectPort="8443"
- URIEncoding="GBK"/>
4.设置前台页面字符编码集
[html] view plaincopy
- <%@ page contentType="text/html;charset=GBK" %>
//此处的charset的值要和web.xml里的 <param-value></param-value>值一样
=================================完=====================================
参考自:
Tomcat服务器目录webapps的examples示例
jsp中文乱码的Filter过滤器配置:http://www.cnblogs.com/zhuboxingzbx/articles/1208118.html
JSP中文乱码,用过滤器方式解决:http://www.zhouwenze.com/archives/20110729-411.html
JSP中文乱码过滤器实例:http://blog.csdn.net/wkupaochuan/article/details/7461208
http://blog.csdn.net/lutinghuan/article/details/8277422
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