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java实现读取、删除文件夹下的文件

2015-05-28 16:25 1041 查看

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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