JAVA中各种路径的获取

package path;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.Properties;
 
import org.junit.Test;
 
import MybatisTest.utils.MbDbUtils;
 
public class PathTest {
    /**
     *
     * @throws FileNotFoundException
     * @throws IOException
     * java中各种获取路径的方式：
     *
     */
    @Test
    public  void testPath() throws FileNotFoundException, IOException {
        /*
         * 1，获取指定的资源路径
         * Consloe1:/E:/MyEclipse2014WorkSpace/AJavaTestPro/WebRoot/WEB-INF/classes/mysqldb.properties
         * Consloe2:/E:/MyEclipse2014WorkSpace/AJavaTestPro/WebRoot/WEB-INF/classes/P1/test.txt
         */
        URL url = ClassLoader.getSystemResource("mysqldb.properties");
        System.out.println("console1:"+url.getPath());
        //
        URL systemResource = ClassLoader.getSystemResource("P1/test.txt");
        System.out.println("console2:"+systemResource.getPath());
        
        /*
         * 2，获取指定类所在路径
         * Console:/E:/MyEclipse2014WorkSpace/AJavaTestPro/WebRoot/WEB-INF/classes/MybatisTest/utils/
         */
        URL resource = MbDbUtils.class.getResource("");
        System.out.println(resource.getPath());
        
        /*
         *,3，获取指定类所在根路径
         * Console:/E:/MyEclipse2014WorkSpace/AJavaTestPro/WebRoot/WEB-INF/classes/
         */
        URL resource2 = MbDbUtils.class.getResource("/");
        System.out.println(resource2.getPath());
        
        /*
         *,4，获取项目根目录的绝对路径
         * console:E:\MyEclipse2014WorkSpace\AJavaTestPro
         */
        String property = System.getProperty("user.dir");
        System.out.println(property);
        
        /*
         *,5，获取类路径和包路径
         * console:
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\classes
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\ant-1.9.6.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\ant-launcher-1.9.6.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\antlr-2.7.7.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\aopalliance.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\asm-5.2.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\aspectjrt.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\aspectjweaver.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\c3p0-0.9.2.1.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\cglib-3.2.5.jar
            jcp:E:\MyEclipse2014WorkSpace\AJavaTestPro\WebRoot\WEB-INF\lib\commons-fileupload-1.3.2.jar
                                        ...
         */
        String property2 = System.getProperty("java.class.path");
        String[] split = property2.split(";");
        for (String string : split) {
            System.out.println("jcp:"+string);
        }
    }
}