get 下载文件

package com.taiping.demo;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;

public class HttpRequest {
    /**
     * 从网络Url中下载文件
     * @param urlStr
     * @param fileName
     * @param savePath
     * @throws IOException
     */
    public static void  downLoadFromUrl(String urlStr,String fileName,String savePath,String toekn) throws IOException{
        URL url = new URL(urlStr);
        //HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        InetSocketAddress addr = new InetSocketAddress("10.4.233.50",31151); 
        Proxy proxy = new Proxy(Proxy.Type.HTTP, addr); // http 代理 
        HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);
        
        //设置超时间为3秒
        conn.setConnectTimeout(3*1000);
        //防止屏蔽程序抓取而返回403错误
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
        //得到输入流
        InputStream inputStream = conn.getInputStream();
        //获取自己数组
        byte[] getData = readInputStream(inputStream);

        //文件保存位置
        File saveDir = new File(savePath);
        if(!saveDir.exists()){
            saveDir.mkdir();
        }
        File file = new File(saveDir+File.separator+fileName);
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(getData);
        if(fos!=null){
            fos.close();
        }
        if(inputStream!=null){
            inputStream.close();
        }
    }

    /**
     * 从输入流中获取字节数组
     * @param inputStream
     * @return
     * @throws IOException
     */
    public static  byte[] readInputStream(InputStream inputStream) throws IOException {
        byte[] buffer = new byte[10240];
        int len = 0;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        while((len = inputStream.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        bos.close();
        return bos.toByteArray();
    }

    public static void main(String[] args) throws IOException {
           String url = "http://mcp-test-health.pingan.com.cn/gateway/mcp/outChannel/downloadPolicy.do?c=TPJJ_DJ&policyNo=00B4FF31A66043E17D41B67E1B060637C5A3176A9410561D608B509C6AC138C0";
            HttpRequest.downLoadFromUrl(url,"222.pdf","D:\",null);
            System.out.println("下载完成");

        }
}

package com.taiping.demo;
import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.InetSocketAddress;import java.net.Proxy;import java.net.URL;
public class HttpRequest {    /**     * 从网络Url中下载文件     * @param urlStr     * @param fileName     * @param savePath     * @throws IOException     */    public static void  downLoadFromUrl(String urlStr,String fileName,String savePath,String toekn) throws IOException{        URL url = new URL(urlStr);        //HttpURLConnection conn = (HttpURLConnection)url.openConnection();        InetSocketAddress addr = new InetSocketAddress("10.4.233.50",31151);         Proxy proxy = new Proxy(Proxy.Type.HTTP, addr); // http 代理         HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);                //设置超时间为3秒        conn.setConnectTimeout(3*1000);        //防止屏蔽程序抓取而返回403错误        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");        //得到输入流        InputStream inputStream = conn.getInputStream();        //获取自己数组        byte[] getData = readInputStream(inputStream);
        //文件保存位置        File saveDir = new File(savePath);        if(!saveDir.exists()){            saveDir.mkdir();        }        File file = new File(saveDir+File.separator+fileName);        FileOutputStream fos = new FileOutputStream(file);        fos.write(getData);        if(fos!=null){            fos.close();        }        if(inputStream!=null){            inputStream.close();        }    }
    /**     * 从输入流中获取字节数组     * @param inputStream     * @return     * @throws IOException     */    public static  byte[] readInputStream(InputStream inputStream) throws IOException {        byte[] buffer = new byte[10240];        int len = 0;        ByteArrayOutputStream bos = new ByteArrayOutputStream();        while((len = inputStream.read(buffer)) != -1) {            bos.write(buffer, 0, len);        }        bos.close();        return bos.toByteArray();    }
    public static void main(String[] args) throws IOException {           String url = "http://mcp-test-health.pingan.com.cn/gateway/mcp/outChannel/downloadPolicy.do?c=TPJJ_DJ&policyNo=00B4FF31A66043E17D41B67E1B060637C5A3176A9410561D608B509C6AC138C0";            HttpRequest.downLoadFromUrl(url,"222.pdf","D:\",null);            System.out.println("下载完成");
        }}