1、JSON值访问

/** * 调用对方接口方法 * @param path 对方或第三方提供的路径 * @param data 向对方或第三方发送的数据，大多数情况下给对方发送JSON数据让对方解析 */public static void interfaceUtil(String path,String data) {    try {        URL url = new URL(path);        //打开和url之间的连接        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        //设置请求的方法类型        conn.setRequestMethod("POST");        //设置请求的内容类型        conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");        //设置发送数据        conn.setDoOutput(true);        //设置接受数据        conn.setDoInput(true);        //发送数据,使用输出流        OutputStream outputStream = conn.getOutputStream();        outputStream.write(data.getBytes("UTF-8"));        //获取URLConnection对象对应的输入流        InputStream is = conn.getInputStream();                //构造一个字符流缓存        BufferedReader br = new BufferedReader(new InputStreamReader(is));        String str = "";        while ((str = br.readLine()) != null) {            System.out.println(str);        }        String response = byteArrayOutputStream.toString();        System.out.println(response);        //关闭流        is.close();        //断开连接，最好写上，disconnect是在底层tcp socket链接空闲时才切断。如果正在被其他线程使用就不切断。        //固定多线程的话，如果不disconnect，链接会增多，直到收发不出信息。写上disconnect后正常一些。        conn.disconnect();        System.out.println("完整结束");    } catch (Exception e) {        e.printStackTrace();    }}

 

 

2、form表单形式提交key-value值访问

 

key-value值放进一个Map中

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.Map;import java.util.Map.Entry;import org.apache.log4j.Logger;/** * 调用对方接口方法 * @author wxd */public class InterfaceUtil {    private static final Logger logger = Logger.getLogger(InterfaceUtil.class);        private static final int REQUEST_SUCCESS = 200;        /**     * 调用对方接口方法     * @param path 对方或第三方提供的路径     * @param data 向对方或第三方发送的数据，大多数情况下给对方发送JSON数据让对方解析     */    public static void postRequest(String path, Map
     
       params) {        OutputStream outputStream = null;        InputStream is = null;        HttpURLConnection conn = null;        URL url = null;        try {            // 拼接请求参数              StringBuffer sb = new StringBuffer();             String sbRlt = null;            if (params != null) {                  for (Entry
      
        e : params.entrySet()) {                      sb.append(e.getKey());                      sb.append("=");                      sb.append(e.getValue());                      sb.append("&");                  }                  sbRlt = sb.substring(0, sb.length() - 1);              }              url = new URL(path);            //打开和url之间的连接            conn = (HttpURLConnection) url.openConnection();                        //设置请求的方法类型            conn.setRequestMethod("POST");            //设置请求的内容类型            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");            //设置发送数据            conn.setDoOutput(true);            //设置接受数据            conn.setDoInput(true);            //发送数据,使用输出流            outputStream = conn.getOutputStream();            outputStream.write(sbRlt.getBytes("UTF-8"));            //获取URLConnection对象对应的输入流            is = conn.getInputStream();            if(conn.getResponseCode() == REQUEST_SUCCESS) {                //构造一个字符流缓存                BufferedReader br = new BufferedReader(new InputStreamReader(is));                String str = "";                while ((str = br.readLine()) != null) {                    logger.info(str);                    System.out.println(str);                }            }else {                logger.error("访问失败");                System.out.println("访问失败");            }        } catch (Exception e) {            logger.error("访问失败");            e.printStackTrace();        } finally {            if(is != null) {                try {                    is.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(outputStream != null) {                try {                    outputStream.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(conn != null) {                conn.disconnect();            }        }    }    }