java 在类里面获取项目路径，创建文件夹和文件

String path=Thread.currentThread().getContextClassLoader().getResource("").toString(); path=path.replace('/', '\\'); // 将/换成\  

path=path.replace("file:", ""); //去掉file:  

path=path.replace("classes\\", ""); //去掉classes\  

path=path.replace("target\\", ""); //去掉target\  

path=path.substring(1); //去掉第一个\,如 \D:\JavaWeb... 

//文件添加下级目录地址

path+= "WEB-INF"+File.separator +"view" + File.separator +"image";  

File file = new File(path);

if (!file.exists()) {

    file.mkdirs();

}

String filename = System.currentTimeMillis() + UUID.randomUUID().toString() + ".png";

FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path + File.separator +filename));

imageOutput.write(fs, 0, fs.length);

imageOutput.close();