Java reads the image from the network and saves it to the local instance

This article shares the specific code for Java to read pictures from the network and save them locally for your reference. The specific content is as follows

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 { 
  //new1 a URL object  
  URL url = new URL("http://www.gz135.cn/data/attachment/forum/201702/13/165605xyayykq5vy4h81vy.jpg"); 
  // Open the link  
  HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 
  // Set the request mode to "GET" 
  conn.setRequestMethod("GET"); 
  // The timeout response time is 5 seconds  
  conn.setConnectTimeout(5 * 1000); 
  // Get the image data from the input stream  
  InputStream inStream = conn.getInputStream(); 
  // Pictographic 2 Base data, to 2 The data obtained by base encapsulation is universal  
  byte[] data = readInputStream(inStream); 
  //new1 File object to save the image, default to save the current project root directory  
  File imageFile = new File("pic20170419.jpg"); 
  // Create an output stream  
  FileOutputStream outStream = new FileOutputStream(imageFile); 
  // Write data  
  outStream.write(data); 
  // Close the output stream  
  outStream.close(); 
 } 
 public static byte[] readInputStream(InputStream inStream) throws Exception{ 
  ByteArrayOutputStream outStream = new ByteArrayOutputStream(); 
  // create 1 a Buffer string  
  byte[] buffer = new byte[1024]; 
  // The length of the string per read, if -1 Represents that all readings have been completed  
  int len = 0; 
  // use 1 One input stream from buffer Read the data out  
  while( (len=inStream.read(buffer)) != -1 ){ 
   // Use the output stream to buffer To write data, the intermediate parameter represents where to start reading, len Represents the length of the read  
   outStream.write(buffer, 0, len); 
  } 
  // Close the input stream  
  inStream.close(); 
  // the outStream The data is written to memory  
  return outStream.toByteArray(); 
 } 

}