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<String,String> 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<String, String> 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(); } } } }