使用spring-web类库实现httpget和httppost请求响应

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import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.Charset;

import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

public class Test {

	public static void main(String[] args) throws IOException, URISyntaxException {
		String url = "https://www.baidu.com/img/bd_logo1.png";  
	    //①创建Http Request(内部使用HttpURLConnection)  
	    ClientHttpRequest request =   
	        new SimpleClientHttpRequestFactory().     
	            createRequest(new URI(url), HttpMethod.GET);  
	    //②设置客户端可接受的媒体类型（即需要什么类型的响应体数据）  
	    request.getHeaders().set("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0");  
//	    request.getHeaders().set("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");  
//	    request.getHeaders().set("Connection", "keep-alive");  
//	    request.getHeaders().set("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");  
	    //③发送请求并得到响应  
	    ClientHttpResponse response = request.execute();   
	    if (response.getStatusCode()==HttpStatus.OK) {
			System.out.println("ok");
		}
	    InputStream is = response.getBody();
	    //BufferedReader读取字符串
//		BufferedReader br = new BufferedReader(new InputStreamReader(is,"utf-8"));
//		String tempLine = br.readLine();
//		StringBuffer tempStr = new StringBuffer();
//		String crlf = System.getProperty("line.separator");
//		while (tempLine != null) {
//			tempStr.append(tempLine);
//			tempStr.append(crlf);
//			tempLine = br.readLine();
//		}
//		br.close();
//		is.close();
//		System.out.println(tempStr);
	    
	    //读取字节，再转为为字符串或者流
	    byte bytes[] = new byte[(int)response.getBody().available()];  
	    is.read(bytes);  
	    FileOutputStream fos=new FileOutputStream(new File("f:/a.png"));
	    fos.write(bytes,0,bytes.length);
	    fos.flush();
	    fos.close();
	    String xmlData = new String(bytes, Charset.forName("utf-8"));  
	    System.out.println(xmlData);  
		
	}

	

}