java.util.zip.Inflater.setInput(byte[] b, int off, int len)
方法设置用于解压缩的输入数据。 每当调用needsInput()
返回true
时,表示需要更多输入数据。
声明
以下是java.util.zip.Inflater.setInput(byte[] b, int off, int len)
方法的声明。
public void setInput(byte[] b, int off, int len)
参数
b
- 字典数据字节。off
- 数据的起始偏移量。len
- 数据的长度。
返回值
- N/A
异常
- N/A
示例
以下示例显示了java.util.zip.Inflater.setInput(byte[] b, int off, int len)
方法的用法。
package com.yiibai;
import java.io.UnsupportedEncodingException;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.Inflater;
public class InflaterDemo {
public static void main(String[] args)
throws DataFormatException, UnsupportedEncodingException {
String message = "Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;"
+"Welcome to Yiibai.com;";
System.out.println("Original Message length : " + message.length());
byte[] input = message.getBytes("UTF-8");
// Compress the bytes
byte[] output = new byte[1024];
Deflater deflater = new Deflater();
deflater.setInput(input);
deflater.finish();
int compressedDataLength = deflater.deflate(output,0,output.length);
deflater.end();
System.out.println("Compressed Message length : " + compressedDataLength);
// Decompress the bytes
Inflater inflater = new Inflater();
inflater.setInput(output, 0, 10);
byte[] result = new byte[1024];
int resultLength = inflater.inflate(result, 0 , 10);
if(inflater.needsInput()){
inflater.setInput(output, 10, compressedDataLength - resultLength);
resultLength +=
inflater.inflate(result, resultLength , result.length - resultLength);
}
inflater.end();
// Decode the bytes into a String
message = new String(result, 0, resultLength, "UTF-8");
System.out.println("UnCompressed Message length : " + message.length());
}
}
执行上面示例代码,得到以下结果 -
Original Message length : 300
Compressed Message length : 42
UnCompressed Message length : 300