java 通用接口 java几种常用接口调用方式

1、get

public String doGet(String url) {
		try {
			URL thisurl = new URL(url); // 把字符串转换为URL请求地址
			HttpURLConnection connection = (HttpURLConnection) thisurl
					.openConnection();// 打开连接
			connection.connect();// 连接会话
			// 获取输入流
			BufferedReader br = new BufferedReader(new InputStreamReader(
					connection.getInputStream(), "UTF-8"));
			String line;
			StringBuilder sb = new StringBuilder();
			while ((line = br.readLine()) != null) {// 循环读取流
				sb.append(line);
			}
			br.close();// 关闭流
			connection.disconnect();// 断开连接

			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
			// System.out.println("失败!");
			return null;
		}
	}

使用jdk自带的java.net.URL;即可

2、delete

public String doDelete(String url) {
		try {
			URL thisurl = new URL(url);
			HttpURLConnection connection = (HttpURLConnection) thisurl
					.openConnection();
			connection.setRequestMethod("DELETE");//就是这里不一样
			connection.connect();
			// 获取输入流
			BufferedReader br = new BufferedReader(new InputStreamReader(
					connection.getInputStream(), "UTF-8"));
			String line;
			StringBuilder sb = new StringBuilder();
			while ((line = br.readLine()) != null) {// 循环读取流
				sb.append(line);
			}
			br.close();// 关闭流

			connection.disconnect();
			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
			// System.out.println("失败!");
			return null;
		}
	}

使用jdk自带的java.net.URL;即可

3、post

private void recieveMsg(String url, String isliID) {
                        HttpClient httpClient = new HttpClient();
			PostMethod postMethod = new PostMethod(url);
			// 填入各个表单域的值，修改这个即可
			NameValuePair[] data = { new NameValuePair("q", isliID) };
			// 将表单的值放入postMethod中
			postMethod.setRequestBody(data);
			int statusCode = 0;
			statusCode = httpClient.executeMethod(postMethod);
			if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY
					|| statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
				// 从头中取出转向的地址
				Header locationHeader = postMethod
						.getResponseHeader("location");
				String location = null;
				if (locationHeader != null) {
					location = locationHeader.getValue();
				}
				return null;
			} else {
                                //调用成功
                               System.out.println(postMethod.getStatusLine());
				String str = "";
				try {
					str = postMethod.getResponseBodyAsString();
					BufferedReader reader = new BufferedReader(new InputStreamReader(
							postMethod.getResponseBodyAsStream(), "UTF-8"));
					 StringBuilder sb = new StringBuilder();
					 String line = null;
					 while ((line = reader.readLine()) != null) {
					 sb.append(line);
					 System.out.println(line);
					 }
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				System.out.println(str);
			}
			postMethod.releaseConnection();
}

使用的jar是

import org.apache.commons.httpclient.Header;
 import org.apache.commons.httpclient.HttpClient;
 import org.apache.commons.httpclient.HttpStatus;
 import org.apache.commons.httpclient.NameValuePair;
 import org.apache.commons.httpclient.methods.PostMethod;

这是个诡异的方法，之前测某个接口的时候使用百度到的其他post都无法正确提交数据，只有这个是对的。（亲测这段代码可以直接拿到android上使用）