ioagent.java

来自「esri的ArcGIS Server超级学习模板程序（for java）」· Java 代码 · 共 59 行

/**
 * 
 */
package com.esri.solutions.jitk.datasources.ogc.wcs;

import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

/**
 * @author vlad2928
 *
 */
public class IOAgent {
	
	private static final Logger _logger = LogManager.getLogger(IOAgent.class);
	
	private static void closeStream(Closeable stream) {
		try {
			if(stream != null) {
				stream.close();
			}
		
		} catch(IOException e) {
			_logger.error("Can not close stream.", e);
		}
	}
	
	public static byte[] readIntoByteArray(InputStream is) throws IOException {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		byte[] buf = new byte[4096];
		
		for(int n=0; (n = is.read(buf)) != -1; baos.write(buf, 0, n));
		closeStream(is);
		
		return baos.toByteArray();
	}
	
	public static byte[] readIntoByteArray(File file) throws IOException {
		return readIntoByteArray(new FileInputStream(file));
	}
	
	public static void write(InputStream is, OutputStream os) throws IOException {
		byte[] buf = new byte[4096];
		
		for(int n=0; (n = is.read(buf)) != -1; os.write(buf, 0, n));
		os.flush();
		
		closeStream(is);
		closeStream(os);
	}
}