HttpTool.java

该类为java源生态的http 请求工具,不依赖第三方jar包 ,即插即用.

package kingtool;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Date;
/**
 * http post发送工具
 * @author King
 *
 */
public class HttpTool {
    public static void main(String[] args) throws Exception {
        String requestUrl = "http://10.15.22.120:9999/httpserver";
        String requestData = readStringFromFile("C:\\Users\\King\\Desktop\\connectANSI.xml","GBK");//有乱码,请修改指定编码
        //_________________________________________________________________________________________
        String returnData=HttpTool.sendRequestData("telesales",requestData, requestUrl,"GBK","GBK", 3000,3000);//大家最终只要使用这一句代码就可调用
        //_________________________________________________________________________________________
    }

    /**
     * 发送报文
     *
     * @param appName 应用系统英文名
     * @param requestData 请求报文
     * @param urlStr    请求地址
     * @param connectionTimeout 链接超时时间  1000代表 1秒
     * @param readTimeout 读取超时时间 1000代表1秒
     * @return
     * @throws IOException
     * @author King
     */
    public static String sendRequestData(String appName,String requestData, String urlStr,String sendEncoding,String recvEncoding, int connectionTimeout,int readTimeout) throws IOException{
        URL url = null;
        HttpURLConnection conn = null;
        ByteArrayOutputStream byteOut = null;
        BufferedReader readInfo = null;
        StringBuffer strBuilder=new StringBuffer();
        OutputStream out = null;
        try {
            System.out.println("请求时间:【"+new Date()+"】");
            System.out.println("请求地址:【"+urlStr+"】");
            System.out.println("请求报文:【"+requestData+"】");
            url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("SOAPAction", "\"\"");
            conn.setRequestProperty("Accept", "application/soap+xml, application/dime, multipart/related, text/*");
            //如果没有下面这一行代码,服务器端可以通过request.getParameter()和request.getInputStream()都接收到相同信息
            //conn.setRequestProperty("content-type", "text/xml;charset=GBK");
            //如果    有上面这一行代码,服务器端仅能通过request.getInputStream()接收信息
            conn.setRequestProperty("User-Agent", "Axis/1.4");
            conn.setRequestProperty("Cache-Control", "no-cache");
            conn.setRequestProperty("appName", appName);//各系统需要设置应用系统名 appName,如电销为telesales
            conn.setUseCaches(false); //忽略缓存
            conn.setDoOutput(true); //使用 URL 连接进行输出
            conn.setDoInput(true); //使用 URL 连接进行输入
            conn.setConnectTimeout(connectionTimeout);//链接超时
            conn.setReadTimeout(readTimeout);//读取超时
            conn.connect();//建立链接
            byteOut = new ByteArrayOutputStream();
            byteOut.write(requestData.getBytes(sendEncoding));//以指定编码发送,如果有乱码,修改之
            byte[] buf = byteOut.toByteArray();
            out = conn.getOutputStream();
            out.write(buf);
            out.flush();
            if (HttpURLConnection.HTTP_OK == conn.getResponseCode()) {//正确返回
                readInfo = new BufferedReader(new java.io.InputStreamReader(conn.getInputStream(),recvEncoding));//以指定编码读取返回信息,如果有乱码,修改之
                String line = null;
                while ((line = readInfo.readLine()) != null) {
                    strBuilder.append(line);
                }
            } else {//没有正确返回
                readInfo = new BufferedReader(new java.io.InputStreamReader(conn.getInputStream(),recvEncoding));//以指定编码读取返回信息,如果有乱码,修改之
                System.out.println("出现异常,返回报文:【"+readInfo+"】");
                throw new IOException("url请求出现问题,返回编码：" + conn.getResponseCode());
            }
            System.out.println("返回时间:【"+new Date()+"】");
            System.out.println("返回报文:【"+strBuilder.toString()+"】");
        } catch (UnsupportedEncodingException e) {
            throw e;
        } catch (MalformedURLException e) {
            throw e;
        } catch (IOException e) {
            throw e;
        }finally {
            try{
                if (readInfo != null) {
                    readInfo.close();
                }
                if (byteOut != null) {
                    byteOut.close();
                }
                if (out != null) {
                    out.close();
                }
                if (conn != null) {
                    conn.disconnect();
                }
            }catch(Exception e){
                System.out.println("关闭链接出错!"+e.getMessage());
            }

        }
        return strBuilder.toString();
    }

    /**
     *
     * @param filePath 文件绝对路径
     * @param encoding 读取文件的编码
     * @return
     * @author King
     * @throws Exception
     */
    public static String readStringFromFile(String filePath,String encoding) {
        File file = new File(filePath);
        System.out.println("文件 "+filePath+"存在与否?: "+ file.exists()+"\n");
        String tempLine = null;
        String retStr = "";
        InputStreamReader isr = null;//way1:
//        FileReader fr = null;//way2
        StringBuilder sb = new StringBuilder();
        try {
            if(file.exists()){
                isr = new InputStreamReader(new FileInputStream(file),encoding);//way1:
//                fr = new FileReader(file);//way2
                BufferedReader br = new BufferedReader(isr);//way1:
//                BufferedReader br =  new BufferedReader(fr);;//way2:
                tempLine = br.readLine();
                while( tempLine != null ){
                    sb.append(tempLine);
                    tempLine = br.readLine();
                }
                retStr = sb.toString();
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try{
                if(isr!=null)
                    isr.close();
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        System.out.println("读到的文件内容如下:");
        System.out.println(retStr+"\n");
        return retStr;
    }
}