post 调用接口，带入json参数，返回json 代码笔记

public String test_post1() {
		String url = \"http://xxxx\";

		byte[] requestBytes;
		String result = \"\";
		try {
			JSONObject js = new JSONObject();
			js.put(\"aaa\", \"ccc\");
			js.put(\"bbb\", \"111\");
			js.put(\"ccc\", \"222\");
			js.put(\"ddd\", \"323\");

			String string = js.toString();

			requestBytes = string.getBytes(\"utf-8\");
			HttpClient httpClient = new HttpClient();// 客户端实例化
			PostMethod postMethod = new PostMethod(url);
			// 设置请求头Authorization
			// postMethod.setRequestHeader(\"Authorization\", \"Basic \" +
			// authorization);
			// 设置请求头 Content-Type
			postMethod.setRequestHeader(\"Content-Type\", \"application/json\");
			InputStream inputStream = new ByteArrayInputStream(requestBytes, 0,
					requestBytes.length);
			RequestEntity requestEntity = new InputStreamRequestEntity(
					inputStream, requestBytes.length,
					\"application/json; charset=utf-8\"); // 请求体
			postMethod.setRequestEntity(requestEntity);
			httpClient.executeMethod(postMethod);// 执行请求
			InputStream soapResponseStream = postMethod
					.getResponseBodyAsStream();// 获取返回的流
			byte[] datas = null;
			datas = readInputStream(soapResponseStream);// 从输入流中读取数据
			result = new String(datas, \"UTF-8\");// 将二进制流转为String
			// 打印返回结果
			System.out.println(result);
		} catch (UnsupportedEncodingException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} // 将参数转为二进制流
		catch (HttpException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return result;

	}