jsp乱码问题解决方法2

来源：互联网发布：生存分析需要什么数据编辑：程序博客网时间：2024/05/16 10:12

2 . Servlet接收表单Request请求时乱码解决方法

第一种解决方法：

在request方法之前加入 request.setCharacterEncoding("GBK");

第二中解决方法：

在后台代码中加入过滤器，并在web.xml配置文件中进行相应的设置

public class SetCharacterEncodingFilter implements Filter

        {
      protected String encoding = null;
          protected FilterConfig filterConfig = null;
        protected boolean ignore = true;
      public void destroy() {
            this.encoding = null;
            this.filterConfig = null;
         }
         public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain)
         throws IOException, ServletException {
             // Conditionally select and set the character encoding to be used
             if (ignore || (request.getCharacterEncoding() == null)) {
                 String encoding = selectEncoding(request);
                 if (encoding != null)
                     request.setCharacterEncoding(encoding);
             }
// Pass control on to the next filter
             chain.doFilter(request, response);
         }

        public void init(FilterConfig filterConfig) throws ServletException {
             this.filterConfig = filterConfig;
             this.encoding = filterConfig.getInitParameter("encoding");
             String value = filterConfig.getInitParameter("ignore");
             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);
         }
}

在配置文件中添加如下代码

          <filter>
             <filter-name>SetCharacterEncoding</filter-name>
             <filter-class>com.filters.SetCharacterEncodingFilter</filter-class>
             <init-param>
                 <param-name>encoding</param-name>
                 <param-value>GBK</param-value>
             </init-param>
          </filter>
         <filter-mapping>
             <filter-name>SetCharacterEncoding</filter-name>
             <url-pattern>/*</url-pattern>
         </filter-mapping>

在jsp页面把method设置为post 默认是get。设置好了method方法就不会出现乱码问题了

第