㈠ java 怎么循环读取文件内容
publicclassTest{回publicvoidgetRemoteId(StringfilePath){答BufferedReaderbr=null;try{//读取StringpathName="D:\1.txt";br=newBufferedReader(newFileReader(newFile(pathName)));Stringline="";while((line=br.readLine())!=null){System.out.println(line);}}catch(Exceptione){System.out.println("readfileerror"+e.getMessage());}finally{if(br!=null)try{br.close();}catch(IOExceptione){e.printStackTrace();}}}}
㈡ java实现动态读取文件夹文件信息
java动态读取某个文件夹下的所有文件信息,代码如下:
importjava.io.FileNotFoundException;importjava.io.IOException;importjava.io.File;publicclassReadFile{publicReadFile(){}/***动态读取某个文件夹下的所有文件信息*/publicstaticbooleanreadfile(Stringfilepath)throwsFileNotFoundException,IOException{try{Filefile=newFile(filepath);if(!file.isDirectory()){System.out.println("文件");System.out.println("path="+file.getPath());System.out.println("absolutepath="+file.getAbsolutePath());System.out.println("name="+file.getName());}elseif(file.isDirectory()){System.out.println("文件夹");String[]filelist=file.list();for(inti=0;i<filelist.length;i++){Filereadfile=newFile(filepath+"\"+filelist[i]);if(!readfile.isDirectory()){System.out.println("path="+readfile.getPath());System.out.println("absolutepath="+readfile.getAbsolutePath());System.out.println("name="+readfile.getName());}elseif(readfile.isDirectory()){readfile(filepath+"\"+filelist[i]);}}}}catch(FileNotFoundExceptione){System.out.println("readfile()Exception:"+e.getMessage());}returntrue;}publicstaticvoidmain(String[]args){try{readfile("e:/videos");//deletefile("D:/file");}catch(FileNotFoundExceptionex){}catch(IOExceptionex){}System.out.println("ok");}}
㈢ java 循环读取一个指定文件夹下的所有文件,提供大致代码的思路吧,谢谢~
publicstaticList<File>getFiles(Stringpath){Fileroot=newFile(path);List<File>files=newArrayList<File>();if(!root.isDirectory()){files.add(root);}else{File[]subFiles=root.listFiles();for(Filef:subFiles){files.addAll(getFiles(f.getAbsolutePath()));}}returnfiles;}publicstaticvoidmain(String[]args){List<File>files=getFiles("D:\usr\local\java\jdk1.6.0_30");for(Filef:files){System.out.println(f.getName());}}
大概就是这样了,没有做异常处理,自己看着办~
㈣ 请问java输入流中当文件大于byte数组长度的时候,该如何循环读取
byte[]data=newbyte[1024];intlen=fis.read(data);//循环将文件fileText.txt中的内容读取到字节数组中StringBuildersb=newStringBuilder();sb.append(newString(data,0,len));while(len!=-1){len=fis.read(data);if(len!=-1){sb.append(newString(data,0,len));}}System.out.println(sb);
㈤ java循环获取文件夹里文件创建时间 。。
可以通过File流的读取所有的文件,之后通过Runtime.getRuntime().exec方法获取时间。举例: File file = new File("F://2007vb6");// 文件目录 try { for (File demoFile : file.listFiles()) { Process ls_proc = Runtime.getRuntime().exec( "cmd.exe /c dir " + file.getAbsolutePath() + " /tc");// 通过DOS获得的创建时间 InputStream is = ls_proc.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(is)); String str; int i = 0; while ((str = br.readLine()) != null) { i++; if (i == 6) { System.out.println("Create time:" + str.substring(0, 17)); //创建时间获取 } } }
㈥ JAVA遍历一个文件夹中的所有文件—(递归)
public void traverseFolder2(String path) {File file = new File(path);
if (file.exists()) {
File[] files = file.listFiles();
if (null == files || files.length == 0) {
System.out.println("文件夹是空的!");
return;
} else {
for (File file2 : files) {
if (file2.isDirectory()) {
System.out.println("文件夹:" + file2.getAbsolutePath());
traverseFolder2(file2.getAbsolutePath());
} else {
System.out.println("文件:" + file2.getAbsolutePath());
}
}
}
} else {
System.out.println("文件不存在!");
}
}
(6)java循环读取文件夹扩展阅读
public void traverseFolder1(String path) {
int fileNum = 0, folderNum = 0;
File file = new File(path);
if (file.exists()) {
LinkedList<File> list = new LinkedList<File>();
File[] files = file.listFiles();
for (File file2 : files) {
if (file2.isDirectory()) {
System.out.println("文件夹:" + file2.getAbsolutePath());
list.add(file2);
foldeNum++;
} else {
System.out.println("文件:" + file2.getAbsolutePath());
fileNum++;
}
}
File temp_file;
while (!list.isEmpty()) {
temp_file = list.removeFirst();
files = temp_file.listFiles();
for (File file2 : files) {
if (file2.isDirectory()) {
System.out.println("文件夹:" + file2.getAbsolutePath());
list.add(file2);
folderNum++;
} else {
System.out.println("文件:" + file2.getAbsolutePath());
fileNum++;
}
}
}
} else {
System.out.println("文件不存在!");
}
System.out.println("文件夹共有:" + folderNum + ",文件共有:" + fileNum);}