Android 开发服务类 03_ServletForGETMethod

接收并处理用户通过 GET 方式上传的数据，一般小于 2K，并且安全性要求不高。

 package com.wangjialin.internet.servlet;

 import java.io.IOException;
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 @WebServlet("/ServletForGETMethod")
 public class ServletForGETMethod extends HttpServlet {

     private static final long serialVersionUID = 1L;

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

             String name= request.getParameter("name");
 //            String name= new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
             String age= request.getParameter("age");
             System.out.println("name: " + name );
             System.out.println("age: " + age );

     }

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         // TODO Auto-generated method stub
     }

 }

HttpServletRequestEncodingWrapper （HttpServletRequest 业务包装器，解决汉字乱码的问题）

 package com.wangjialin.internet.filter;

 import java.io.UnsupportedEncodingException;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletRequestWrapper;

 public class HttpServletRequestEncodingWrapper extends
         HttpServletRequestWrapper {

     private HttpServletRequest request;
     public HttpServletRequestEncodingWrapper(HttpServletRequest request) {
         super(request);
         this.request = request;
     }

     @Override
     public String getParameter(String name) {

         String value = request.getParameter(name);
         try {
             if(value != null){
                 return new String(value.getBytes("ISO8859-1"), "UTF-8");
             }
         } catch (UnsupportedEncodingException e) {
         }
         return super.getParameter(name);
     }

 }

EncodingFilter

 package com.wangjialin.internet.filter;

 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;
 import javax.servlet.http.HttpServletRequest;

 @WebFilter("/*")
 public class EncodingFilter implements Filter {

     public void destroy() {
         // TODO Auto-generated method stub
     }

     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
             throws IOException, ServletException {

         HttpServletRequest req = (HttpServletRequest) request;

         if("GET".equals(req.getMethod())){

             HttpServletRequestEncodingWrapper wraper = new HttpServletRequestEncodingWrapper(req);
             chain.doFilter(wraper, response);

         }else{
             req.setCharacterEncoding("UTF-8");
             chain.doFilter(request, response);
         }
     }

     public void init(FilterConfig fConfig) throws ServletException {
         // TODO Auto-generated method stub
     }
 }