文件的一些简单操作
package com.jeecms.core.util;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.net.URL;import java.util.Calendar;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;@Service@Transactionalpublic class FileOperatorImpl implements FileOperator {private static final Log log = LogFactory.getLog(FileOperatorImpl.class);public static int BF_SIZE = 2048;public String readFile(String path) {try {BufferedReader reader = new BufferedReader(new FileReader(path));try {StringBuilder builder = new StringBuilder();char[] ch = new char;for (int i = 0; (i = reader.read(ch)) != -1;) {builder.append(ch, 0, i);}return builder.toString();} finally {reader.close();}} catch (FileNotFoundException e) {log.warn("文件未找到！：" + path, e);} catch (IOException e) {log.warn("IO异常！：" + path, e);}return "";}public void writeFile(String path, String name, String content) {if (content == null) {content = "";}try {File f = new File(path);if (!f.exists()) {f.mkdirs();}BufferedWriter writer = new BufferedWriter(new FileWriter(path+ name));try {writer.write(content);} finally {writer.close();}} catch (IOException e) {throw new RuntimeException(e);}}public boolean writeFile(String url, File dist) {try {writeFile(new URL(url).openStream(), dist);return true;} catch (IOException e) {log.warn("无法下载图片！", e);return false;}}public boolean deleteFile(File file) {if (file.isDirectory()) {for (File f : file.listFiles()) {deleteFile(f);}file.delete();} else {file.delete();}return file.delete();}public boolean copy(File src, File dist) {boolean isSuccess = false;if (src.exists()) {if (src.isFile()) {isSuccess = copyFile(src, dist);} else {// 如果目标路径在源路径里，则不也许拷贝if (dist.getPath().indexOf(src.getPath()) != -1) {return false;}dist.mkdirs();File[] fs = src.listFiles();for (File f : fs) {copy(f, new File(dist.getPath() + File.separator+ f.getName()));}isSuccess = true;}}return isSuccess;}public boolean copyFile(File src, File dist) {if (src.exists() && src.isFile()) {try {writeFile(new FileInputStream(src), dist);return true;} catch (FileNotFoundException e) {log.warn("复制文件时，找不到文件", e);}}return false;}public boolean writeFile(InputStream sour, File dist) {try {File p = dist.getParentFile();if (p != null && !p.exists()) {p.mkdirs();}BufferedInputStream is = null;BufferedOutputStream os = null;byte[] bf = new byte;try {is = new BufferedInputStream(sour);os = new BufferedOutputStream(new FileOutputStream(dist));for (int i = -1; (i = is.read(bf)) != -1;) {os.write(bf, 0, i);}return true;} finally {if (is != null) {is.close();}if (os != null) {os.close();}}} catch (FileNotFoundException e) {log.warn("复制文件时，找不到文件", e);} catch (IOException e) {log.warn("复制文件时，io异常", e);}return false;}public String fileName(String resUrl) {String datepath = Calendar.getInstance().get(Calendar.YEAR) + ""+ Calendar.getInstance().get(Calendar.MONTH) + ""+ Calendar.getInstance().get(Calendar.DAY_OF_MONTH);resUrl = datepath + resUrl;return resUrl;}}
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