java删除附件图片
package com.zjn.IO;
import java.io.File;
public class DeleteFileController {
/**
* 删除文件，可以是单个文件或文件夹
* @param fileName 待删除的文件名
* @return 文件删除成功返回true,否则返回false
*/
public static boolean delete(String fileName){
File file = new File(fileName);
if(!file.exists()){
System.out.println("删除文件失败："+fileName+"文件不存在");
return false;
}else{
if(file.isFile()){
//删除文件
return deleteFile(fileName);
}else{
//删除文件夹
return deleteDirectory(fileName);
}
}
}
/**
* 删除单个文件
* @param fileName 被删除文件的文件名
* @return 单个文件删除成功返回true,否则返回false
*/
public static boolean deleteFile(String fileName){
File file = new File(fileName);
if(file.isFile() && file.exists()){
file.delete();
System.out.println("删除单个文件"+fileName+"成功！");
return true;
}else{
System.out.println("删除单个文件"+fileName+"失败！");
return false;
}
}
/**
* 删除目录（文件夹）以及目录下的文件
* @param dir 被删除目录的文件路径
* @return 目录删除成功返回true,否则返回false
*/
public static boolean deleteDirectory(String dir){
//如果dir不以文件分隔符结尾，自动添加文件分隔符
if(!dir.endsWith(File.separator)){
dir = dir+File.separator;
}
File dirFile = new File(dir);
//如果dir对应的文件不存在，或者不是一个目录，则退出
if(!dirFile.exists() || !dirFile.isDirectory()){
System.out.println("删除目录失败"+dir+"目录不存在！");
return false;
}
boolean flag = true;
//删除文件夹下的所有文件(包括子目录)
File[] files = dirFile.listFiles();
for(int i=0;i<files.length;i++){
//删除子文件
if(files[i].isFile()){
flag = deleteFile(files[i].getAbsolutePath());
if(!flag){
break;
}
}
//删除子目录
else{
flag = deleteDirectory(files[i].getAbsolutePath());
if(!flag){
break;
}
}
}
if(!flag){
System.out.println("删除目录失败");
return false;
}
//删除当前目录
if(dirFile.delete()){
System.out.println("删除目录"+dir+"成功！");
return true;
}else{
System.out.println("删除目录"+dir+"失败！");
return false;
}
}
//删除文件夹
//param folderPath 文件夹完整绝对路径
public static void delFolder(String 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) {
e.printStackTrace();
}
}
//删除指定文件夹下所有文件
//param path 文件夹完整绝对路径
public static boolean delAllFile(String path) {
boolean flag = false;
File file = new File(path);
if (!file.exists()) {
return flag;
}
if (!file.isDirectory()) {
return flag;
}
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
flag = true;
}
}
return flag;
}
public static void main(String[] args) {
String fileDir = "D:\\logo.png";
DeleteFileController.delete(fileDir);
System.out.println("删除文件结束");
DeleteFileController t = new DeleteFileController();
delFolder("D:/zz");
System.out.println("deleted");
}
}
// pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.cn</groupId>
<artifactId>upload</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.0.6.RELEASE</version>
</dependency>
<!-- <dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.2.3</version>
</dependency> -->
<!--文件上传下载所用的包============ -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<!-- jstl-impl -->
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>1.2</version>
</dependency>
<!-- 标签standard包 -->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- 数据库配置 -->
<!--mybatis mysql-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.6</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.29</version>
</dependency>
<!-- jdbc驱动jar包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.1.RELEASE</version>
</dependency>
<!-- 生成token需要的jar包 -->
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>3.8.2</version>
</dependency>
<!-- 企业微信-->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.4.5</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.51</version>
</dependency>
</dependencies>
</project>
