java实现读取、删除文件夹下的文件_java

java实现读取、删除文件夹下的文件

package test.com;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

public class ReadFile {
  public ReadFile() {
  }
  /**
   * 读取某个文件夹下的所有文件
   */
  public static boolean readfile(String filepath) throws FileNotFoundException, IOException {
      try {

          File file = new File(filepath);
          if (!file.isDirectory()) {
//              System.out.println("文件");
//              System.out.println("path=" + file.getPath());
//              System.out.println("absolutepath=" + file.getAbsolutePath());
              System.out.println(file.getName());

          } else if (file.isDirectory()) {
              String[] filelist = file.list();
              for (int i = 0; i < filelist.length; i++) {
                  File readfile = new File(filepath + "\\" + filelist[i]);
                  if (!readfile.isDirectory()) {
//                      System.out.println("path=" + readfile.getPath());
//                      System.out.println("absolutepath="
//                              + readfile.getAbsolutePath());
                      System.out.println(readfile.getName());

                  } else if (readfile.isDirectory()) {
                      readfile(filepath + "\\" + filelist[i]);
                  }
              }

          }

      } catch (FileNotFoundException e) {
          System.out.println("readfile()  Exception:" + e.getMessage());
      }
      return true;
  }

  /**
   * 删除某个文件夹下的所有文件夹和文件
   */

  /*public static boolean deletefile(String delpath)
          throws FileNotFoundException, IOException {
      try {

          File file = new File(delpath);
          if (!file.isDirectory()) {
              System.out.println("1");
              file.delete();
          } else if (file.isDirectory()) {
              System.out.println("2");
              String[] filelist = file.list();
              for (int i = 0; i < filelist.length; i++) {
                  File delfile = new File(delpath + "\\" + filelist[i]);
                  if (!delfile.isDirectory()) {
                      System.out.println("path=" + delfile.getPath());
                      System.out.println("absolutepath="
                              + delfile.getAbsolutePath());
                      System.out.println("name=" + delfile.getName());
                      delfile.delete();
                      System.out.println("删除文件成功");
                  } else if (delfile.isDirectory()) {
                      deletefile(delpath + "\\" + filelist[i]);
                  }
              }
              file.delete();

          }

      } catch (FileNotFoundException e) {
          System.out.println("deletefile()  Exception:" + e.getMessage());
      }
      return true;
  }*/

  public static void main(String[] args) {
      try {
          readfile("C:\\Users\\SW\\Desktop\\SKJ_H25補正\\004_RCAG\\003_SKJ");
          // deletefile("D:/file");
      } catch (FileNotFoundException ex) {
      } catch (IOException ex) {
      }
      System.out.println("ok");
  }

}

方法二：

package otherstudy;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

/**
 * @ClassName: TestReadFile
 * @CreateTime: Aug 1, 2014 11:42:44 AM
 * @Author: mayi
 * @Description: 读取和删除文件夹下的所有文件
 *
 */
public class TestReadFile {
	/**
	 * 获取工程的WebRoot的绝对路径
	 * @return
	 */
	String getProjectPath(){
		//得到形如"/d:/${workspace}/${projectName}/WebRoot/WEB-INF/classes/"的 路径
    String path=this.getClass().getResource("/").getPath();
    //从路径字符串中取出工程路径
    path=path.substring(1, path.indexOf("WEB-INF/classes"));
    System.out.println("工程路径："+path);
    return path;
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		TestReadFile trf=new TestReadFile();
		String xmlPath = trf.getProjectPath()+ "testDocs";
		try {
			readAllFile(xmlPath);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	/**
	 * 读取指定路径文件夹下的所有文件
	 * @param filepath
	 * @return
	 * @throws FileNotFoundException
	 * @throws IOException
	 */
	public static boolean readAllFile(String filepath)
			throws FileNotFoundException, IOException {
		try {
			File file = new File(filepath);
			if (!file.isDirectory()) {
				System.out.println("\n文件信息：");
				System.out.println("\t相对路径=" + file.getPath());
				System.out.println("\t绝对路径=" + file.getAbsolutePath());
				System.out.println("\t文件全名=" + file.getName());

			} else if (file.isDirectory()) {
				System.out.println("\n文件夹内文件列表信息：");
				File[] fileList = file.listFiles();
				for (int i = 0; i < fileList.length; i++) {
					File readfile = fileList[i];
					if (!readfile.isDirectory()) {
						System.out.println("\n\t相对路径=" + readfile.getPath());
						System.out.println("\t绝对路径=" + readfile.getAbsolutePath());
						System.out.println("\t文件全名=" + readfile.getName());
					} else if (readfile.isDirectory()) {
						readAllFile(fileList[i].getPath());
					}
				}
			}
		} catch (FileNotFoundException e) {
			System.out.println("readfile()  Exception:" + e.getMessage());
		}
		return true;
	}

	/**
	 * 删除某个文件夹下的所有文件夹和文件
	 * @param delpath
	 * @return
	 * @throws FileNotFoundException
	 * @throws IOException
	 */
	public static boolean deleteFile(String delpath)
			throws FileNotFoundException, IOException {
		try {
			File file = new File(delpath);
			if (!file.isDirectory()) {
				System.out.println("1");
				file.delete();
			} else if (file.isDirectory()) {
				System.out.println("2");
				File[] fileList = file.listFiles();
				for (int i = 0; i < fileList.length; i++) {
					File delfile = fileList[i];
					if (!delfile.isDirectory()) {
						System.out.println("相对路径=" + delfile.getPath());
						System.out.println("绝对路径=" + delfile.getAbsolutePath());
						System.out.println("文件全名=" + delfile.getName());
						delfile.delete();
						System.out.println("删除文件成功");
					} else if (delfile.isDirectory()) {
						deleteFile(fileList[i].getPath());
					}
				}
				file.delete();
			}
		} catch (FileNotFoundException e) {
			System.out.println("deletefile()  Exception:" + e.getMessage());
		}
		return true;
	}
}

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