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Copy pathByteArrayStream.java
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executable file
·74 lines (62 loc) · 2.28 KB
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package array;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.Arrays;
/**
* 如何将byte[]转换称String,内容不变呢。使用 ISO-8859-1 编码
* 由于 UTF-8 是多字节编码，需要用多个字节来表示一个字符的编码，所以也就出现了在转换之后 byte[] 数组长度、内容不一致的情况。
* <p>
* 而 ISO-8859-1 编码是单字节编码，所以使用该编码就不会出现上面的问题
*/
public class ByteArrayStream {
static byte[] data = {66, 77, -50, 33, 40, 37, 34, 41, 38, 31, 38, 35, 28, 35,
34, 60, 69, 68, 95, 103, 104, 111, 119, 120, -128, -121, -118,
-124, -117, -114, -119, -112, -107, -121, -114, -109, -123,
-117};
public static void main(String[] args) {
String charset = Charset.defaultCharset().name();//UTF-8
System.out.println("charset:" + charset);
test();
}
/**
* 将byte[]转成string，再专程byte[] ，怎么变化了呢
*/
static void test() {
String t = null;
{
t = new String(data);
byte[] c = t.getBytes();
System.out.println("c:" + Arrays.toString(c));//内容和原data数组不同
}
{
try {
t = new String(data, "ISO-8859-1");
byte[] c = t.getBytes("ISO-8859-1");
System.out.println("c:" + Arrays.toString(c));//内容和原data数据相同
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
static void test2() {
ByteArrayInputStream out = new ByteArrayInputStream(data);
String con = out.toString();
System.out.println(con);
back(con);
}
static void back(String s) {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bout);
try {
dos.writeUTF(s);
} catch (IOException e) {
e.printStackTrace();
}
byte[] buf = bout.toByteArray();// 获取内存缓冲区中的数据
Arrays.toString(buf);
}
}