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
    }
}