您的位置:首页 > 理论基础 > 计算机网络

HttpClient 使用get方式发送数据到服务器并下载服务器文件

2015-09-18 14:27 741 查看
助手类

public class HttpClientGetUtil
{

/***
* 模拟表单提交数据
* */
public static String
loginGet(String url){
HttpClient client = new DefaultHttpClient(); //客户端对象
HttpGet get = new HttpGet(url); //请求对象
try {
HttpResponse httpResponse = client.execute(get); //连接服务器
if(httpResponse.getStatusLine().getStatusCode()==200){ //当请求服务的返回值为200就说明请求成功了
HttpEntity entity= httpResponse.getEntity();
return EntityUtils.toString(entity, "GBK");
}

} catch (ClientProtocolException
e) {
// TODO Auto-generated
catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated
catch block
e.printStackTrace();
}
return "" ;
}
/***
* 下载文件
* */
public static void downFile(String
urlStr,String target){
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(urlStr);
FileOutputStream fos= null;
try {
HttpResponse response=client.execute(get);
if(response.getStatusLine().getStatusCode()==200){
HttpEntity entity = response.getEntity();
fos = new FileOutputStream(target);
fos.write(EntityUtils. toByteArray(entity)); //写入到磁盘
System. out.println("sucess!" );
/*
InputStream is = entity.getContent();
byte [] b = new byte[1024*800];
int tem =0;
while(( tem=is.read())!=-1){
fos.write(b, 0, tem);
}
*/
}
fos.flush();
fos.close();
} catch (ClientProtocolException
e) {
// TODO Auto-generated
catch block
e.printStackTrace();
} catch (IOException
e) {
// TODO Auto-generated
catch block
e.printStackTrace();
}

}
}
测试类
public class HttpClientGetTest
{

public static void main(String[]
args) {
// TODO Auto-generated
method stub
// String url ="http://localhost:8080/mp3/servlet/HttpClientServlet";
// Scanner s = new Scanner(System.in);
// System.out.println("请输入用户名");
// String name = s.next();
// System.out.println("请输入密码");
// String password = s.next();
// String urlstr=url +"?"+"username="+name+"&password="+password;
// System.out.println( urlstr);
// String msg= HttpClientGetUtil.loginGet(urlstr);
// System.out.println( msg);
String str1 = "http://localhost:8080/mp3/aixi.jpg" ;
String target= "d:\\aixi.jpg";
HttpClientGetUtil. downFile(str1, target)

}
}
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: