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。

转载地址：http://eipc.baihongyu.com/