本文共 2978 字,大约阅读时间需要 9 分钟。
首先贴了一个完整的方法
public class ConnectionUtils { /** * * @param path 路径 * @param method 查询方法 * @param param 查询参数 * @return * @throws IOException */ public static String SearchQualifications(String path, String method, Mapparam) throws IOException { OutputStreamWriter out = null; BufferedReader br = null; String data = null; StringBuffer result = new StringBuffer(""); /*处理data信息*/ data = JSONObject.toJSONString(param); URL url = new URL(path); /*打开链接*/ HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); /*设置请求方式*/ httpURLConnection.setRequestMethod(method); /*设置通用请求属性*/ httpURLConnection.setRequestProperty("accept", "*/*"); httpURLConnection.setRequestProperty("connection", "Keep-Alive"); httpURLConnection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); httpURLConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8"); //DoOutput设置是否向httpUrlConnection输出,DoInput设置是否从httpUrlConnection读入,此外发送post请求必须设置这两个 httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); /*写入数据*/ out = new OutputStreamWriter(httpURLConnection.getOutputStream(), "UTF-8"); out.write(data); out.flush(); /*获取输入流*/ InputStream inputStream = httpURLConnection.getInputStream(); br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); String str = ""; while ((str = br.readLine()) != null) { result.append(str); } String resultStr = result.toString(); return resultStr; }}
主要分为了几个模块
1、创建 URL、Connection通道
URL url = new URL(path);/*打开链接*//*对 url 产生的 URLConnection 进行强转*/HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
2、设置通道属性和请求方式
/*设置请求方式*/ httpURLConnection.setRequestMethod(method); /*设置通用请求属性*/ httpURLConnection.setRequestProperty("accept", "*/*"); httpURLConnection.setRequestProperty("connection", "Keep-Alive"); httpURLConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8"); //DoOutput设置是否向httpUrlConnection输出,DoInput设置是否从httpUrlConnection读入,此外发送post请求必须设置这两个 httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true);
3、写入数据、读取数据
/*写入数据*/ out = new OutputStreamWriter(httpURLConnection.getOutputStream(), "UTF-8"); out.write(data); out.flush(); /*获取输入流*/ InputStream inputStream = httpURLConnection.getInputStream(); br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); String str = ""; while ((str = br.readLine()) != null) { result.append(str); } String resultStr = result.toString(); return resultStr; }
因为我这边调用的接口是返回json字符串类型。所以我是直接返回的 String类型。
暂时就这。
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