Android向服务器传送和接收数据的方法汇总

╰+哭是因爲堅強的太久メ 2024-02-17 14:27 47阅读 0赞

今天通过收集资料和自己尝试的使用，整理了Android向服务器发送数据的方法主要有以下几种，下面写在一个类中，相应的调用就可实现！

注意：开始我在使用时，调用各种方法总是报错，后来到处查找，但是就是找不到错误，最终在高手的指点下找到了原因，在网络编程时，调用各种方法时，我们一定要在线程完成。

源码：

package com.example.shezhi;
    
    import java.io.IOException;
    import java.io.OutputStream;  
    import java.net.HttpURLConnection;  
    import java.net.URL;  
    import java.net.URLEncoder;  
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Map;  
    
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.HttpStatus;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.ClientProtocolException;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.client.utils.URLEncodedUtils;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
      
    public class Update   
    {  
    	String res=" ";
    	int ites;
    	String version="1";
    
    / 
       public String getupdate(){
    	 //先将参数放入List，再对参数进行URL编码   
    	  List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();   
    	   params.add(new BasicNameValuePair("param1", "1"));   
    	   params.add(new BasicNameValuePair("param2", "value2"));   
    	     
    	   //对参数编码   
    	   String param = URLEncodedUtils.format(params, "UTF-8");   
    	   //baseUrl              
    	   String baseUrl = "http://******/index1.jsp";   
    	   //将URL与参数拼接   
    	   HttpGet getMethod = new HttpGet(baseUrl + "?" + param);   
    	                  
    	   HttpClient httpClient = new DefaultHttpClient();   
    	   try {
    		HttpResponse response = httpClient.execute(getMethod);
    		 res="已经请求";
    	} catch (ClientProtocolException e) {
    		// TODO Auto-generated catch block
    		e.printStackTrace();
    	} catch (IOException e) {
    		// TODO Auto-generated catch block
    		e.printStackTrace();
    	} //发起GET请求   
    	  
    	   try {   
    	       HttpResponse response = httpClient.execute(getMethod); //发起GET请求   
    	     
    	      ites=response.getStatusLine().getStatusCode(); //获取响应码   
    	      System.out.println(ites+"aaa");
    	       res="1213"+EntityUtils.toString(response.getEntity(), "utf-8");//获取服务器响应内容   
    	       System.out.println(res+"vvv");
    	       
    	   } catch (ClientProtocolException e) {   
    	       // TODO Auto-generated catch block   
    	       e.printStackTrace();   
    	   } catch (IOException e) {   
    	       // TODO Auto-generated catch block   
    	       e.printStackTrace();   
    	   }  
    	  
    	   return res;
       }
      
    
       /******************************************************************************************** 
     /**
      * HttpClient  Post方法
      * @return
      */
       public String Postupdate(){
    	   String urlPath="http://******/index1.jsp";  
           String realPath=urlPath.replaceAll(" ", "");//把多余的空格替换掉   
           HttpPost httpRequest=new HttpPost(realPath);
    	   // 添加要传递的参数  
    	   List<NameValuePair> params = new ArrayList<NameValuePair>();
    	   NameValuePair pair1 = new BasicNameValuePair("username", "gzw");
    	   NameValuePair pair2 = new BasicNameValuePair("password", "123");
    	   params.add(pair1);
    	   params.add(pair2);
           try
           {
        	// 设置字符集  
        	   HttpEntity httpentity = new UrlEncodedFormEntity(params, "utf-8");  
        	   // 请求httpRequest
        	   httpRequest.setEntity(httpentity); 
        	   // 取得默认的HttpClient 
        	   HttpClient httpclient = new DefaultHttpClient(); 
        	   // 取得HttpResponse  
        	   HttpResponse httpResponse = httpclient.execute(httpRequest); 
        	   // HttpStatus.SC_OK表示连接成功  
        	   if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) 
        	   {    
        		   // 取得返回的字符串 
        		   String strResult = EntityUtils.toString(httpResponse.getEntity()); 
        		   res=strResult;
        	   } 
        	   else     
        	   {    
        		  
        		   res="失败";
        	   } 
        	   
           }catch  (Exception e)   
           {
        	   e.printStackTrace();
           }
           return res; 
    
       }
    /********************************************************************************************/ 
       /**
        * 调用java类  get方法
        */
        
        public String get_update(){
    	   String urlPath="http://******/index1.jsp"+"?type=save&version="+version+"";  
           String realPath=urlPath.replaceAll(" ", "");//把多余的空格替换掉   
           try
           {
        	   if(getRequest(realPath))
               {
            	   //成功
        		   res="成功";
               }
        	   
           }catch  (Exception e)   
           {
        	   res="失败";
           }
           return res; 
    
       }
       
       
       
       
       /**
        * java类  get方法
        * @return
        */
    	
    	//get请求，有文件长度大小限制   
        public static boolean getRequest(String urlPath) throws Exception  
        {  
            URL url=new URL(urlPath);  
            HttpURLConnection con=(HttpURLConnection)url.openConnection();  
            con.setRequestMethod("GET");  
            con.setReadTimeout(5*1000);  
            if(con.getResponseCode()==200)  
            {  
                return true;  
            }  
            return false;  
        }  
        
     /********************************************************************************************   
        /**
         * 调用下面java类  Post方法
         * @return
         */
        
        public String post_update(){
     	   String urlPath="http://www.gdhdcy.com/hdleague1/index1.jsp";  
            Map<String,String> map=new HashMap<String,String>();//用集合来做，比字符串拼接来得直观   
            map.put("type", "save");  
            map.put("version", version);  
            try
            {
         	   if(postRequest(urlPath,map))
                {
             	   //成功
         		   res="成功";
                }
         	   
            }catch  (Exception e)   
            {
         	   res="失败";
            }
     	return res; 
    
        }
        /**
         * java类  post方法
         * @return
         */
        //post请求，无文件长度大小限制   
        public static boolean postRequest(String urlPath,Map<String,String> map) throws Exception  
        {  
            StringBuilder builder=new StringBuilder(); //拼接字符   
            //拿出键值   
            if(map!=null && !map.isEmpty())  
            {  
                for(Map.Entry<String, String> param:map.entrySet())  
                {  
                    builder.append(param.getKey()).append('=').append(URLEncoder.encode(param.getValue(), "utf-8")).append('&');  
                }  
                builder.deleteCharAt(builder.length()-1);  
            }  
            //下面的Content-Length: 是这个URL的二进制数据长度   
            byte b[]=builder.toString().getBytes();  
            URL url=new URL(urlPath);  
            HttpURLConnection con=(HttpURLConnection)url.openConnection();  
            con.setRequestMethod("POST");  
            con.setReadTimeout(5*1000);  
            con.setDoOutput(true);//打开向外输出   
            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//内容类型   
            con.setRequestProperty("Content-Length",String.valueOf(b.length));//长度   
            OutputStream outStream=con.getOutputStream();  
            outStream.write(b);//写入数据   
            outStream.flush();//刷新内存   
            outStream.close();  
            //状态码是不成功   
            if(con.getResponseCode()==200)  
            {  
                return true;  
            }  
            return false;   
              
        }  
    }