Java IO工具类
package com.zhangjun.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @author
* @ IO工具类
* */
public class IOUtil {
private IOUtil(){};
/**
* 将流转成字符串
* */
public static String Stream2String(InputStream is)throws IOException{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int i=-1;
while((i=is.read())!=-1){
baos.write(i);
}
return new String(baos.toByteArray(),"UTF-8");
};
/**
* 将输入流存储到byte数组中
* @param
*/
public static byte[] in2byte(InputStream is) throws IOException{
byte[] bs= new byte[1024];
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int len = -1;
while((len=is.read(bs))!=-1){
bos.write(bs,0,len);
}
bs = bos.toByteArray() ;
return bs ;
}
/**
* byte数组转换成string
* @param
*/
public static String toString(byte[] input) throws IOException {
return new String(input);
}
/**
* byte数组转换成string
* @param charset 编码格式
*/
public static String toString(byte[] input,String charset) throws IOException {
return new String(input,charset);
}
/**
* 将字符串转换为输入流
* @param charset 编码格式
*/
public static InputStream toInputStream(String input) {
byte[] bytes = input.getBytes();
return new ByteArrayInputStream(bytes);
}
/**
* 将byte数组转换为输入流
* @param charset 编码格式
*/
public static InputStream byte2InputStream(byte[] b){
return new ByteArrayInputStream(b);
};
/**
* 将字符串转换为输入流
* @param input 需要转换的字符串
* @param encoding 编码格式
*/
public static InputStream toInputStream(String input, String encoding) throws IOException {
byte[] bytes = encoding != null ? input.getBytes(encoding) : input.getBytes();
return new ByteArrayInputStream(bytes);
}
public static void copy(InputStream in, OutputStream out) throws IOException {
byte[] buf = new byte[1024];
while (true) {
int len = in.read(buf);
if (len < 0) break;
out.write(buf, 0, len);
}
}
}
