MusicWork/main/java/com/example/musicwork/freeModel/FileServiceDownload.java

package com.example.musicwork.freeModel;

import android.os.Environment;
import android.util.Log;

import org.apache.commons.io.IOUtils;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.HashMap;

public class FileServiceDownload {

    public static boolean downloadForm(String filename) throws IOException {
        //String downloadDir = Environment.getExternalStorageDirectory();
        // 普通参数
        //String filename="111.txt";
        String urlStr = "http://42.193.97.132:8080/Manager/readfil-servlet";
        MyThread_filedownload myThread = new MyThread_filedownload(filename,urlStr);
        try
        {
            myThread.start();
            myThread.join();
        }
        catch (InterruptedException e)
        {
            e.printStackTrace();
        }

        return myThread.getResult();
    }


}
class MyThread_filedownload extends Thread {

    private String urlStr;
    private String filename;
    private String downloadDir;
    public boolean result=false;

    public MyThread_filedownload(String filename, String urlStr) {
        this.urlStr = urlStr;
        this.filename = filename;
    }
    @Override
    public void run() {
        try {
            URL url = new URL(urlStr);
            URLConnection urlConnection = url.openConnection();
            HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setRequestProperty("Charset", "UTF-8");
            String data = "filename=" + URLEncoder.encode(filename, "utf-8");//设置数据
            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//设置响应类型
            httpURLConnection.setRequestProperty("Content-Length", data.length() + "");//设置内容长度
            httpURLConnection.setDoOutput(true);//允许输出
            OutputStream outputStream = httpURLConnection.getOutputStream();
            outputStream.write(data.getBytes("utf-8"));//写入数据
            httpURLConnection.connect();
            // 文件大小
            int fileLength = httpURLConnection.getContentLength();
            URLConnection con = url.openConnection();
            InputStream bin = new BufferedInputStream(httpURLConnection.getInputStream());
            BufferedReader in = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(), "utf-8"));

            Log.e("download filename:",filename);
            String filepath=Environment.getExternalStorageDirectory().getPath();
            File file=new File(filepath,"/Music/"+filename);
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs();
            }
            OutputStream out = new FileOutputStream(file);
            int size = 0;
            byte[] buf = new byte[1024];
            while ((size = bin.read(buf)) != -1) {
                out.write(buf, 0, size);
            }
            IOUtils.copy(bin, out);
            if(file.length()!=0){
                result=true;
            }
            bin.close();
            out.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public boolean getResult() {
        return result;
    }


}