java 将文件中二进制文件转换成文本文本文件并输出

import java.io.DataInputStream; import java.io.File; import java.io.FileInputStream; //import java.io.FileOutputStream; import java.io.IOException; public class ReadBinaryTest { public String testDataInputStream(String filepath) throws IOException { File file = new File(filepath); DataInputStream din = new DataInputStream(new FileInputStream(file)); StringBuffer hexData = new StringBuffer(); //for(int i=0;i<file.length();i++){ // return (char)Integer.parseInt(din.readByte(),2); // } byte temp = 0; for (int i = 0; i < file.length(); i++) { temp = din.readByte(); // 以十六进制的无符号整数形式返回一个字符串表示形式。 String str = Integer.toHexString(temp); if (str.length() == 8) {// 去掉补位的f str = str.substring(6); } if (str.length() == 1) { str = "0" + str; } str =str.toUpperCase(); //hexData.append(str); //hexData.append(str); int m = Integer.parseInt(str.toString(),16); char c =(char)m; System.out.println(c); hexData.append(c); //hexData.append(m);//则为打印ascii码值 hexData.append(" "); } return hexData.toString(); } }