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JFinal is a simple, light, rapid,independent, extensible Java WEB + ORM framework. The feature of JFinal looks like ruby on rails especially ActiveRecord.

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/**
 * Copyright (c) 2011-2019, James Zhan 詹波 ([email protected]).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.upload;

import java.io.File;
import com.jfinal.kit.LogKit;
import com.jfinal.kit.PathKit;
import com.jfinal.kit.StrKit;
import com.oreilly.servlet.multipart.FileRenamePolicy;

/**
 * OreillyCos.
 */
public class OreillyCos {
	
	public static void init(String uploadPath, int maxPostSize, String encoding) {
		if (StrKit.isBlank(uploadPath)) {
			throw new IllegalArgumentException("uploadPath can not be blank.");
		}
		try {
			Class.forName("com.oreilly.servlet.MultipartRequest");
			doInit(uploadPath, maxPostSize, encoding);
		} catch (ClassNotFoundException e) {
			LogKit.logNothing(e);
		}
	}
	
	public static void setFileRenamePolicy(FileRenamePolicy fileRenamePolicy) {
		if (fileRenamePolicy == null) {
			throw new IllegalArgumentException("fileRenamePolicy can not be null.");
		}
		MultipartRequest.fileRenamePolicy = fileRenamePolicy;
	}
	
	private static void doInit(String uploadPath, int maxPostSize, String encoding) {
		uploadPath = uploadPath.trim();
		uploadPath = uploadPath.replaceAll("\\\\", "/");
		
		String baseUploadPath;
		if (PathKit.isAbsolutePath(uploadPath)) {
			baseUploadPath = uploadPath;
		} else {
			baseUploadPath = PathKit.getWebRootPath() + File.separator + uploadPath;
		}
		
		// remove "/" postfix
		if (baseUploadPath.equals("/") == false) {
			if (baseUploadPath.endsWith("/")) {
				baseUploadPath = baseUploadPath.substring(0, baseUploadPath.length() - 1);
			}
		}
		
		MultipartRequest.init(baseUploadPath, maxPostSize, encoding);
	}
}