Android向服务器传送和接收数据的方法汇总

来源：互联网发布：iphone当前网络不可用编辑：程序博客网时间：2024/05/16 20:10
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 blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.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;                 }  }
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