工具类：java构建一次post请求并返回结果、从输入流中读取数据

public class StaffInfoUtil {
    
    

    /**
     * 发送post请求
     *
     * @param params        参数
     * @param requestUrl    请求地址
     * @param authorization 授权书
     * @return 返回结果
     * @throws IOException
     * @author
     */
    public static String sendPost(NameValuePair[] data, String requestUrl,
                                  String authorization, String headerValue) throws IOException {
    
    

        HttpClient httpClient = new HttpClient();// 客户端实例化
        PostMethod postMethod = new PostMethod(requestUrl);
        //设置请求头Authorization
        postMethod.setRequestHeader("Authorization", "Basic " + authorization);
        // 设置请求头API_KEY
        postMethod.setRequestHeader("API_KEY", headerValue);
        // 设置请求头 Content-Type
        postMethod.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
        //   将表单的值放入postMethod中
        postMethod.setRequestBody(data);
        //   执行postMethod
        int statusCode = 0;
        try {
    
    
            statusCode = httpClient.executeMethod(postMethod);
        } catch (HttpException e) {
    
    
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
    
    
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        //   HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发
        //   301或者302
        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();
                System.out.println("The page was redirected to:" + location);
            } else {
    
    
                System.err.println("Location field value is null.");
            }
            return null;
        } else {
    
    
            String str = "";
            try {
    
    
                str = postMethod.getResponseBodyAsString();
            } catch (IOException e) {
    
    
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return str;
        }

    }

    /**
     * 从输入流中读取数据
     *
     * @param inStream
     * @return
     * @throws Exception
     */
    public static byte[] readInputStream(InputStream inStream) throws Exception {
    
    
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = inStream.read(buffer)) != -1) {
    
    
            outStream.write(buffer, 0, len);
        }
        byte[] data = outStream.toByteArray();
        outStream.close();
        inStream.close();
        return data;
    }

}

把输出的字符串转为相应的数据类型：

Map<String, Object> resultMap = (Map<String, Object>) JSON.parse(result);