WebService方法进行接口连接

package com.transsion.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

import com.alibaba.druid.util.Base64;
import com.transsion.common.BaseData;


public class HttpRequest {
    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + (url.indexOf("?")>-1?"&":"?") + (param == null?"":param);
            URL realUrl = new URL(urlNameString);
            URLConnection connection = setAttr(realUrl,null);
            // 建立实际的连接
            connection.connect();
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        return sendPostWithAuth(url,param,null);
    }
    
    /**
     * @param count 发送请求次数，如为2，则当第一次发送失败后，会再次发送一次请求
     */
    public static String sendPostWithAuth(String url,String param, String userPass, int count){
        String data = null;
        while(count > 0){
            count--;
            data = sendPostWithAuth(url, param, userPass);
            if (StringUtil.isNotBlank(data)) {
                break;
            }
        } 
        return data;
    }
    
    /**
     * userPass格式为：    账号:密码,无需加密
     */
    public static String sendPostWithAuth(String url,String param, String userPass){
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = setAttr(realUrl,userPass);
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }

    private static URLConnection setAttr(URL realUrl, String userPass) throws IOException {
        URLConnection conn = realUrl.openConnection();
        // 设置通用的请求属性
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        if (userPass != null) {
            conn.setRequestProperty("Authorization", "Basic " + Base64.byteArrayToBase64(userPass.getBytes()));
        }
        return conn;
    }    
    
    public static void main(String[] args) {
        String userpass = "ZPID_OA:Trans123";
        System.out.println(sendPostWithAuth("http://sappid01.transsion.com:50000/RESTAdapter/OA/GetDepartment", "{\"IV_OBJID\":\"\",\"IV_KEYDAY\":\"\",\"IV_FLAG\":\"A\",\"TT_DEPT\":\"\"}", userpass));
    }
}