Java从网络读取图片并保存至本地| Id | Title | DateAdded | SourceUrl | PostType | Body | BlogId | Description | DateUpdated | IsMarkdown | EntryName | CreatedTime | IsActive | AutoDesc | AccessPermission |
| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------|
| 14397029| Java从网络读取图片并保存至本地| 2021-02-10T23:38:00| | BlogPost|
package getUrlPic;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class GetUrlPic {
public static void main(String[] args) throws Exception {
//new一个URL对象
URL url = new URL("http://www.gz135.cn/data/attachment/forum/201702/13/165605xyayykq5vy4h81vy.jpg");
//打开链接
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置请求方式为"GET"
conn.setRequestMethod("GET");
//超时响应时间为5秒
conn.setConnectTimeout(5 * 1000);
//通过输入流获取图片数据
InputStream inStream = conn.getInputStream();
//得到图片的二进制数据，以二进制封装得到数据，具有通用性
byte[] data = readInputStream(inStream);
//new一个文件对象用来保存图片，默认保存当前工程根目录
File imageFile = new File("pic20170419.jpg");
//创建输出流
FileOutputStream outStream = new FileOutputStream(imageFile);
//写入数据
outStream.write(data);
//关闭输出流
outStream.close();
}
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
//创建一个Buffer字符串
byte[] buffer = new byte[1024];
//每次读取的字符串长度，如果为-1，代表全部读取完毕
int len = 0;
//使用一个输入流从buffer里把数据读取出来
while( (len=inStream.read(buffer)) != -1 ){
//用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
outStream.write(buffer, 0, len);
}
//关闭输入流
inStream.close();
//把outStream里的数据写入内存
return outStream.toByteArray();
}
}
| 648658| | 2024-04-29T21:14:00| false| | 2021-02-10T23:38:28.293| true| package getUrlPic; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java| Anonymous| 标签：java,读取,io,outStream,new,-------------,本地,import,Java From： https://www.cnblogs.com/ralphlauren/p/18621223