十五、从互联网获取图片且保存到指定目录

package com.ljq.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.junit.Test;

/**
 * 从互联网获取图片且保存到指定目录里
 * 
 * @author jiqinlin
 *
 */
public class InternetTest {

    @SuppressWarnings("static-access")
    @Test
    public void getImg() throws Exception {
        String urlPath = "http://i0.itc.cn/20101116/62d_67fd2b2a_207d_4de2_a4f9_fb93cc8da492_0.jpg";
        URL url = new URL(urlPath);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setConnectTimeout(6*1000);  // 注意要设置超时，设置时间不要超过10秒，避免被android系统回收
        if (conn.getResponseCode() != 200) throw new RuntimeException("请求url失败");
        InputStream inSream = conn.getInputStream();
        //把图片保存到项目的根目录
        new InternetTest().readAsFile(inSream, new File("sohu.jpg")); 
    }
    
    public static void readAsFile(InputStream inSream, File file) throws Exception{
        FileOutputStream outStream = new FileOutputStream(file);
        byte[] buffer = new byte[1024];
        int len = -1;
        while( (len = inSream.read(buffer)) != -1 ){
            outStream.write(buffer, 0, len);
        }
         outStream.close();
        inSream.close();
    }

}