[移动开发]接口调用工具类

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;

public class HttpClientUtil {
    public static String doPost(String path, String body) {
        OutputStreamWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        HttpURLConnection conn = null;
        try {
            URL url = new URL(path);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            //发送 POST 请求必须设置为 true
            conn.setDoOutput(true);
            conn.setDoInput(true);

            //设置连接超时时间和读取超时时间
            conn.setConnectTimeout(120000);
            conn.setReadTimeout(120000);
            conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
            conn.setRequestProperty("Accept", "application/json");
            //获取输出流
            out = new OutputStreamWriter(conn.getOutputStream(),"UTF-8");
            String jsonStr = body;
            String encoding = out.getEncoding();
            out.write(jsonStr);
            out.flush();
            out.close();
            //取得输入流，并使用 Reader 读取
            if (200 == conn.getResponseCode()) {
                in = new BufferedReader(new InputStreamReader(conn.getInputStream(),
                        "UTF-8"));
                String line;
                while ((line = in.readLine()) != null) {
                    result.append(line);
                    System.out.println(line);
                }
            } else {
                System.out.println("ResponseCode is an error code:" + conn.getResponseCode());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
        return result.toString();
    }
    public static String doGet(String path, Map<String, Object> params) {
        HttpURLConnection conn = null;
        InputStream is = null;

        BufferedReader br = null;
        StringBuilder result = new StringBuilder();
        try {
            if (params != null) {
                String paramStr = "";
                for (String key : params.keySet()) {
                    if (!paramStr.isEmpty()) {
                        paramStr += '&';
                    }
                    paramStr += key + '=' + params.get(key).toString();
                }
                if (path.indexOf('?') > 0) {
                    path += '&' + paramStr;
                } else {
                    path += '?' + paramStr;
                }
            }
            //创建远程 url 连接对象
            URL url = new URL(path);
            //通过远程 url 连接对象打开一个连接，强转成 HTTPURLConnection 类
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            //设置连接超时时间和读取超时时间
            conn.setConnectTimeout(120000);
            conn.setReadTimeout(120000);
            conn.setRequestProperty("Accept", "application/json");
            //发送请求
            conn.connect();
            //通过 conn 取得输入流，并使用 Reader 读取
            if (200 == conn.getResponseCode()) {
                is = conn.getInputStream();
                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                String line;
                while ((line = br.readLine()) != null) {
                    result.append(line);
                    System.out.println(line);
                }
            } else {
                System.out.println("ResponseCode is an error code:" + conn.getResponseCode());
            }
        } catch (MalformedURLException e) {
            //e.printStackTrace();
        } catch (IOException e) {

            //e.printStackTrace();
        } catch (Exception e) {
            //e.printStackTrace();
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
                if (is != null) {
                    is.close();
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
            conn.disconnect();
        }
        return result.toString();
    }
}

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