java File处理

Posted 2020-10-06 djp平

package com.zero4j.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Component;
import org.springframework.web.context.ServletContextAware;
import org.springframework.web.multipart.MultipartFile;

/**
*
* 上传工具类
*
*
*/
@Component
public class UploadUtil implements ServletContextAware {

private static ServletContext servletContext = null;

@Override
public void setServletContext(ServletContext servletContext) {
this.servletContext = servletContext;
}

/**
* 保存文件
*
* @param files
* @param id
* @param request
* @author hzr 2016年12月5日
*/
public static void fileSave(MultipartFile files, String id, HttpServletRequest request) {
String fileFileName = files.getOriginalFilename();
if (files == null || files.equals("")) {
return;
} else {
String extension = (fileFileName.substring(fileFileName.lastIndexOf(".") + 1, fileFileName.length())).toLowerCase(); // 获取扩展名并转换成小写
// 开始执行上传操作
try {

// 设定图片上传的临时目录
File srcFile = new File(servletContext.getRealPath("/uploads/other/"), id + "." + extension);
System.out.println(srcFile);
if (!srcFile.exists()) {
System.out.println("路径不存在！！！！！！！！");
srcFile.mkdirs();
}
files.transferTo(srcFile);

} catch (Exception e) {
e.printStackTrace();
return;
}

/*
* //如果文件后缀不同则先删除原有文件
* if(files.getExtension()==null||!extension.equals
* (_upload.getExtension().toLowerCase())){ new
* File(ServletActionContext
* .getRequest().getRealPath("/uploads/other"),
* _upload.getId()+"."+_upload.getExtension()).deleteOnExit(); }
*
* //更新文件后缀到数据库中 _upload.setContentType(this.fileContentType);
* _upload.setExtension(extension);
* this.uploadService.update(_upload);
*/

// }

}

}




/**
* 保存文件
*
* @param files
* @param id
* @param request
* @author hzr 2016年12月5日
*/
public static String fileSave_other(MultipartFile files, String id, HttpServletRequest request) {
String fileFileName = files.getOriginalFilename();
if (files == null || files.equals("")) {
return null;
} else {
String extension = (fileFileName.substring(fileFileName.lastIndexOf(".") + 1, fileFileName.length())).toLowerCase(); // 获取扩展名并转换成小写
// 开始执行上传操作
try {

// 设定图片上传的临时目录

File srcFile = new File(servletContext.getRealPath("/uploads/styleItem/"), id + "." + extension);
System.out.println(srcFile);
if (!srcFile.exists()) {
System.out.println("文件路径不存在！！！！！！！！");
srcFile.mkdirs();
}

/*String imageSourcePath = request.getRealPath("/uploads/styleItem");
File srcFile = new File(imageSourcePath, id + "." + extension);
if(!srcFile.exists()){
srcFile.mkdir();
}*/

//System.out.println(srcFile.toString()+"路径asdasdasdsa");
files.transferTo(srcFile);
return "/uploads/styleItem/"+id + "." + extension ;
} catch (Exception e) {
e.printStackTrace();
return null ;
}

/*
* //如果文件后缀不同则先删除原有文件
* if(files.getExtension()==null||!extension.equals
* (_upload.getExtension().toLowerCase())){ new
* File(ServletActionContext
* .getRequest().getRealPath("/uploads/other"),
* _upload.getId()+"."+_upload.getExtension()).deleteOnExit(); }
*
* //更新文件后缀到数据库中 _upload.setContentType(this.fileContentType);
* _upload.setExtension(extension);
* this.uploadService.update(_upload);
*/

// }

}

}

/**
* 删除文件夹
* @param filePathAndName String 文件夹路径及名称 如c:/fqf
* @param fileContent String
* @return boolean
*/
public static void delFolder(String folderPath) {
folderPath=servletContext.getRealPath(folderPath);
//System.out.println("执行删除文件夹操作 源文件路径"+folderPath);
try {
delAllFile(folderPath); //删除完里面所有内容
String filePath = folderPath;
filePath = filePath.toString();
java.io.File myFilePath = new java.io.File(filePath);
myFilePath.delete(); //删除空文件夹

}
catch (Exception e) {
System.out.println("删除文件夹操作出错");
e.printStackTrace();

}

}



/**
* 删除文件夹里面的所有文件
* @param path String 文件夹路径 如 c:/fqf
*/
public static void delAllFile(String path) {
path=servletContext.getRealPath(path);

File file = new File(path);
if (!file.exists()) {
return;
}
if (!file.isDirectory()) {
return;
}
String[] tempList = file.list();
File temp = null;
for (int i = 0; i < tempList.length; i++) {
if (path.endsWith(File.separator)) {
temp = new File(path + tempList[i]);
}
else {
temp = new File(path + File.separator + tempList[i]);
}
if (temp.isFile()) {

temp.delete();
}
if (temp.isDirectory()) {
delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
delFolder(path+"/"+ tempList[i]);//再删除空文件夹
}
}
}

/**
* 复制单个文件
* @param oldPath String 原文件相对路径 如：c:/fqf.txt
* @param newPath String 复制后相对路径 如：f:/fqf.txt
* @return boolean
*/
public static boolean copyFile(String oldPath, String newPath) {
// System.out.println("执行复制文件操作 源文件路径"+servletContext.getRealPath(oldPath)+" 目的文件路径 "+servletContext.getRealPath(newPath));
try {
// int bytesum = 0;
int byteread = 0;
File oldfile = new File(servletContext.getRealPath(oldPath));

File srcFile = new File(servletContext.getRealPath("/uploads/styleItemTemplate/"));
//System.out.println(srcFile);
if (!srcFile.exists()) {
System.out.println("文件夹路径不存在！！！！！！！！");
srcFile.mkdirs();
}

File myFileName = new File(servletContext.getRealPath(newPath));
try{
if (!myFileName.exists()) {
myFileName.createNewFile();
}
}catch (Exception e) {
System.out.println("新建文件操作出错");
e.printStackTrace();
return false;
}


if (oldfile.exists()) { //文件存在时
InputStream inStream = new FileInputStream(servletContext.getRealPath(oldPath)); //读入原文件
FileOutputStream fs = new FileOutputStream(servletContext.getRealPath(newPath));

byte[] buffer = new byte[1444];
// int length;
while ( (byteread = inStream.read(buffer)) != -1) {
// bytesum += byteread; //字节数 文件大小
// System.out.println(bytesum);
fs.write(buffer, 0, byteread);

}
inStream.close();
// System.out.println("复制成功");
}
return true;
}
catch (Exception e) {
System.out.println("复制单个文件操作出错");
e.printStackTrace();
return false;

}

}

/**
* 复制单个文件
* @param tempalteFileFolderRoute String 临时文件夹路径相对路径 如：c:/fqf
* @param newPath String 资源文件夹路径相对路径 如：f:/fqf1
* @return boolean
*/
public static boolean copyFileFolder(String tempalteFileFolderRoute, String newPath) {
// System.out.println("执行复制文件操作 源文件路径"+servletContext.getRealPath(oldPath)+" 目的文件路径 "+servletContext.getRealPath(newPath));

try {
File srcFile = new File(servletContext.getRealPath(tempalteFileFolderRoute));
if (!srcFile.exists()) {
System.out.println("文件夹路径不存在！！！！！！！！");
srcFile.mkdirs();
}


File srcFile1 = new File(servletContext.getRealPath(newPath));
if (!srcFile1.exists()) {
System.out.println("文件夹路径不存在！！！！！！！！");
srcFile1.mkdirs();
}


String path=servletContext.getRealPath(tempalteFileFolderRoute);

File file = new File(path);
String[] tempList = file.list();
File temp = null;
for (int i = 0; i < tempList.length; i++) {

String tempRoute=tempalteFileFolderRoute+"/"+tempList[i];
String normalRoute=newPath+"/"+tempList[i];

File oldfile = new File(servletContext.getRealPath(tempRoute));


File myFileName = new File(servletContext.getRealPath(normalRoute));
int byteread = 0;
try{
if (!myFileName.exists()) {
myFileName.createNewFile();
}
}catch (Exception e) {
System.out.println("新建文件操作出错");
e.printStackTrace();
return false;
}


if (oldfile.exists()) { //文件存在时
InputStream inStream = new FileInputStream(servletContext.getRealPath(tempRoute)); //读入原文件
FileOutputStream fs = new FileOutputStream(servletContext.getRealPath(normalRoute));

byte[] buffer = new byte[1444];
// int length;
while ( (byteread = inStream.read(buffer)) != -1) {
// bytesum += byteread; //字节数 文件大小
// System.out.println(bytesum);
fs.write(buffer, 0, byteread);

}
inStream.close();
//System.out.println("复制成功");

}
}
return true;
}
catch (Exception e) {
System.out.println("复制文件操作出错");
e.printStackTrace();
return false;



}
}

/*para
source 源文件目录
dest 复制文件目录
para*/
/*复制文件*/
public static void copyFile2(String source, String dest) {
System.out.println("执行复制文件操作 源文件路径"+servletContext.getRealPath(source)+" 目的文件路径 "+servletContext.getRealPath(dest));



File srcFile = new File(servletContext.getRealPath("/uploads/styleItemTemplate"));
System.out.println(srcFile);
if (!srcFile.exists()) {
System.out.println(servletContext.getRealPath(dest)+" 路径不存在！！！！！！！！");
srcFile.mkdirs();
}

try {
File in = new File(servletContext.getRealPath(source));//源文件目录
File out = new File(servletContext.getRealPath(dest)); //复制文件目录
FileInputStream inFile = new FileInputStream(in);
FileOutputStream outFile = new FileOutputStream(out);
byte[] buffer = new byte[102400];
int i = 0;
while ((i = inFile.read(buffer)) != -1) {
outFile.write(buffer, 0, i);
}//end while
inFile.close();
outFile.close();
System.out.println("复制成功");
}//end try
catch (Exception e) {
System.out.println(e.toString());
}//end catch
}//end copyFile




/*删除文件方法*/
public boolean deleteFile(String sPath) {
System.out.println("执行删除文件操作 源文件路径"+servletContext.getRealPath("/uploads/styleItem")+sPath);

boolean flag = false;
File file = new File(servletContext.getRealPath("/uploads/styleItem")+sPath);
// 路径为文件且不为空则进行删除
if (file.isFile() && file.exists()) {
file.delete();
flag = true;
}
return flag;
}

}