int、long、String类型数据与字节数组转换

package practice.converttobytes;

public class ConvertToBytes {
	//int型转换为byte[]
	public static byte[] int2Bytes(int a){
		byte[] arr=new byte[4];
		for(int i=0;i>i*8)&0xff);
		}
		return arr;
	}
	//byte[]转换为int型
	public static int bytes2int(byte[] arr){
		int result=0;
		for(int i=0;i>i*8)&0xff);
		}
		return arr;
	}
	//byte[]转换为long型
	public static long bytes2long(byte[] arr){
		long result=0;
		for(int i=0;i