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>

             
               
      
       EncodingFilter
      
                
      
       com.filters.SetCharacterEncodingFilter
      
                
      
                     
       
        encoding
       
                     
       
        GBK
       
                 
                
      
                     
       
        ignore
                     
       
        true
                 
            
           
               
      
       EncodingFilter
                
      
       /*
       
            
         
     

2.实现过滤器代码，创建一个SetCharacterEncodingFilter类

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 = 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 == 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" 

4.设置前台页面字符编码集

<%@ 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