java获取文件名及扩展名总结

如：文件filePath = "E:\\test\\test.dxf"

1.获取文件名

eg：获取 test.dxf

通过file对象

import java.io.File;

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

File tmpFile=new File(filePath);

String fileName=tmpFile.getName();

System.out.println(fileName);

}

}

使用split

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

//带扩展名的文件名

String temp[] = filePath.split("\\\\");

String fileName = temp[temp.length - 1];

System.out.println(fileName);

}

}

使用substring

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

String fileName = filePath.substring(filePath.lastIndexOf("\\")+1);

System.out.println(fileName);

}

}

2.获取不带扩展名的文件名

eg：获取 test

使用substring

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

String fileName = filePath.substring(filePath.lastIndexOf("\\")+1);

String name = fileName.substring(0,fileName.lastIndexOf("."));

System.out.println(name);

}

}

3.扩展名

eg：获取 dxf

使用substring

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

String fileName = filePath.substring(filePath.lastIndexOf("\\")+1);

String name = fileName.substring(filePath.lastIndexOf(".")+1);

System.out.println(name);

}

}

或

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

String fileName = filePath.substring(filePath.lastIndexOf("\\")+1);

String[] strArray = fileName.split("\\.");

int suffixIndex = strArray.length -1;

System.out.println(strArray[suffixIndex]);

}

}

或

public class test {

public static void main(String[] args) {

String filePath = "E:\\test\\test.dxf";

String fileName = filePath.substring(filePath.lastIndexOf("\\")+1);

System.out.println(fileName);

String extension=fileName.substring(fileName.lastIndexOf(".")+1,fileName.length());

System.out.println(extension);

}

}

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