Question

java中获取文件路径的几种方式

Answer 1

获取当前类的所在工程路径;
如果不加“/”
File f = new File(this.getClass().getResource("").getPath());
System.out.println(f);结果：C:\Documents%20and%20Settings\Administrator\workspace\projectName\bin\com\test
获取当前类的绝对路径；第二种：File directory = new File("");//参数为空
String courseFile = directory.getCanonicalPath() ;
System.out.println(courseFile);结果：C:\Documents and Settings\Administrator\workspace\projectName
获取当前类的所在工程路径;第三种：URL xmlpath = this.getClass().getClassLoader().getResource("selected.txt");
System.out.println(xmlpath);结果：file:/C:/Documents%20and%20Settings/Administrator/workspace/projectName/bin/selected.txt
获取当前工程src目录下selected.txt文件的路径第四种：System.out.println(System.getProperty("user.dir"));结果：C:\Documents and Settings\Administrator\workspace\projectName
获取当前工程路径第五种：System.out.println( System.getProperty("java.class.path"));结果：C:\Documents and Settings\Administrator\workspace\projectName\bin获取当前工程路径

Answer 2

package first.second;

import java.io.File;

public class GetPath {

public static void getPath()
{
//方式一
System.out.println(System.getProperty("user.dir"));
//方式二
File directory = new File("");//设定为当前文件夹
try{
System.out.println(directory.getCanonicalPath());//获取标准的路径
System.out.println(directory.getAbsolutePath());//获取绝对路径
}catch(Exception e)
{
e.printStackTrace();
}
//方式三
System.out.println(GetPath.class.getResource("/"));
System.out.println(GetPath.class.getResource(""));
//方式4
System.out.println(GetPath.class.getClassLoader().getResource(""));
System.out.println(GetPath.class.getClassLoader().getResource("source.xml"));
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
GetPath.getPath();
}

}