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
     }
 }