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java:后台调用接口链接方式(HttpURLConnection)
阅读量:159 次
发布时间:2019-02-28

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, Map
param) 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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