Java的HttpUtils类，下载图片用

Posted on 2015年9月24日 by allenmo

package com.example.lcheng215.fixture;

import android.util.Log;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * Created by Lcheng 215 on 2015-9-24.
 */
public class HttpUtils {
    //private final static String URL_PATH = "http://192.168.6.9/webel/images/corporate.png";
    private final static String URL_PATH = "http://c.hiphotos.baidu.com/album/w%3D2048/sign=aa13cdbb023b5bb5bed727fe02ebd539/7dd98d1001e93901a318412e7aec54e736d1968c.jpg";

    public static InputStream getImageViewInputStream() throws IOException{
        InputStream inputStream = null;
        URL url = new URL(URL_PATH);
        if(url != null){
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setConnectTimeout(3000);
            httpURLConnection.setRequestMethod("GET");
            httpURLConnection.setDoInput(true);
            int response_code = httpURLConnection.getResponseCode();
            if(response_code == 200){
                inputStream = httpURLConnection.getInputStream();
            }
        }
        return inputStream;
    }

    public static byte[] getImageViewArray(){
        byte[] data = null;
        InputStream inputStream = null;
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try{
            Log.v("kkk", "in class HttpUtils getImageViewArray()");
            Log.v("kkk", URL_PATH);
            URL url = new URL(URL_PATH);
            if(url != null){
                Log.v("kkk", "url not null");
                HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
                Log.v("kkk", "httpURLConnection implented");
                httpURLConnection.setConnectTimeout(3000);
                Log.v("kkk", "after setConnecttimeout()");
                httpURLConnection.setRequestMethod("GET");
                Log.v("kkk", "after setRequestMethod()");
                httpURLConnection.setDoInput(true);
                Log.v("kkk", "after setDoInput()");
                int response_code = httpURLConnection.getResponseCode();
                //int response_code = 200;
                Log.v("kkk", "after getResponseCode():");
                if(response_code == 200){
                    int len = 0;
                    byte[] b_data = new byte[1024];
                    Log.v("kkk","connection 200, ok");
                    inputStream = httpURLConnection.getInputStream();
                    while ((len = inputStream.read(b_data)) != -1){
                        outputStream.write(b_data,0,len);
                    }
                    data = outputStream.toByteArray();
                }
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(inputStream != null){
                try{
                    inputStream.close();
                }catch (IOException e){
                    e.printStackTrace();
                }
            }
        }
        return data;
    }
}

package com.example.lcheng215.fixture;

import android.util.Log;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

/**

* Created by Lcheng 215 on 2015-9-24.

public class HttpUtils {

//private final static String URL_PATH = "http://192.168.6.9/webel/images/corporate.png";

private final static String URL_PATH = "http://c.hiphotos.baidu.com/album/w%3D2048/sign=aa13cdbb023b5bb5bed727fe02ebd539/7dd98d1001e93901a318412e7aec54e736d1968c.jpg";

public static InputStream getImageViewInputStream() throws IOException{

InputStream inputStream = null;

URL url = new URL(URL_PATH);

if(url != null){

HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();

httpURLConnection.setConnectTimeout(3000);

httpURLConnection.setRequestMethod("GET");

httpURLConnection.setDoInput(true);

int response_code = httpURLConnection.getResponseCode();

if(response_code == 200){

inputStream = httpURLConnection.getInputStream();

}

return inputStream;

}

public static byte[] getImageViewArray(){

byte[] data = null;

InputStream inputStream = null;

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

try{

Log.v("kkk", "in class HttpUtils getImageViewArray()");

Log.v("kkk", URL_PATH);

URL url = new URL(URL_PATH);

if(url != null){

Log.v("kkk", "url not null");

HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();

Log.v("kkk", "httpURLConnection implented");

httpURLConnection.setConnectTimeout(3000);

Log.v("kkk", "after setConnecttimeout()");

httpURLConnection.setRequestMethod("GET");

Log.v("kkk", "after setRequestMethod()");

httpURLConnection.setDoInput(true);

Log.v("kkk", "after setDoInput()");

int response_code = httpURLConnection.getResponseCode();

//int response_code = 200;

Log.v("kkk", "after getResponseCode():");

if(response_code == 200){

int len = 0;

byte[] b_data = new byte[1024];

Log.v("kkk","connection 200, ok");

inputStream = httpURLConnection.getInputStream();

while ((len = inputStream.read(b_data)) != -1){

outputStream.write(b_data,0,len);

}

data = outputStream.toByteArray();

}

}catch (Exception e){

e.printStackTrace();

}finally {

if(inputStream != null){

try{

inputStream.close();

}catch (IOException e){

e.printStackTrace();

}

return data;

}