Java io源对文件的操作

Java io流对文件的操作
以前写的一个对文件内容的操作的公有类，但未考虑多用户对同一文件操作，每思至此，还是在博客写得东西,记录一些东西，我喜欢还是直接上代码比较直观。

package com.manage.tpl;import java.util.List;import org.springframework.web.multipart.MultipartFile;/** * 模板Service *  * @author liufang *  */public interface TplManager {/** * 获得模板列表。根据前缀，用于选择模板。 *  * @param prefix *            前缀 * @return */public List<? extends Tpl> getListByPrefix(String prefix);public List<String> getNameListByPrefix(String prefix);/** * 获得下级模板列表。根据路径，用于展现下级目录和文件。 *  * @param path *            路径 * @return */public List<? extends Tpl> getChild(String path);/** * 保存模板 *  * @param name *            模板名称 * @param source *            模板内容 * @param isDirecotry *            是否目录 */public void save(String name, String source, boolean isDirectory);/** * 保存模板 *  * @param path * @param file */public void save(String path, String file);/** * 获得模板 *  * @param 文件路径 * @return */public Tpl get(String path);/** * 更新模板 *  * @param name *            模板文件路径 * @param source *            模板内容 */public void update(String path, String source);/** * 修改模板名称或路径 *  * @param orig源 * @param dist目标 */public void rename(String orig, String dist);/** * 删除模板 *  * @param names *            模板名称数组 * @return 被删除的模板数量 */public int delete(String[] names);/** * 查询文件路径是否符合归则 * 返回true 或false * true * */public boolean isCheckPath(String path);}

package com.manage.tpl;import java.util.Date;/** * 模板接口 *  * @author liufang *  */public interface Tpl {/** * 获得模板完整名称，是文件的唯一标识。 *  * @return */public String getName();/** * 获得路径，不包含文件名的路径。 *  * @return */public String getPath();/** * 获得模板名称，不包含路径的文件名。 *  * @return */public String getFilename();/** * 获得模板内容 *  * @return */public String getSource();/** * 获得最后修改时间（毫秒） *  * @return */public long getLastModified();/** * 获得最后修改时间（日期） *  * @return */public String getLastModifiedDate();/** * 获得文件大小，单位bytes *  * @return */public long getLength();/** * 获得文件大小，单位K bytes *  * @return */public int getSize();/** * 是否目录 *  * @return */public boolean isDirectory();}

package com.manage.tpl;import java.io.BufferedWriter;import java.io.File;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStreamWriter;import java.util.ArrayList;import java.util.List;import org.apache.commons.io.FileUtils;import org.apache.log4j.Logger;public class FileTplManagerImpl implements TplManager {private Logger log = Logger.getLogger(this.getClass());/** * 删除文件或文件夹 */private String root;// 应用所在绝对路径public FileTplManagerImpl(String root) {this.root = root;}@Overridepublic int delete(String[] names) {// TODO Auto-generated method stubFile file = null;int count = 0;for (String name : names) {name = this.getRoot() + "/" + name;file = new File(name);if (file.isDirectory()) {try {FileUtils.deleteDirectory(file);count++;} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}} else if (file.isFile()) {file.delete();count++;}}return 0;}/** * 获取单个文件 */@Overridepublic Tpl get(String path) {// TODO Auto-generated method stubFile file = new File(path);if (file.exists()) {return new FileTpl(file, path);}return null;}public List<Tpl> getChild(String path) {File file = new File(path);File[] child = file.listFiles();if (child != null) {List<Tpl> list = new ArrayList<Tpl>();for (File f : child) {if (f.exists()) {list.add(new FileTpl(f, f.getPath()));}}return list;} else {return new ArrayList<Tpl>(0);}}@Overridepublic List<? extends Tpl> getListByPrefix(String prefix) {return null;}@Overridepublic List<String> getNameListByPrefix(String prefix) {// TODO Auto-generated method stubreturn null;}@Overridepublic void rename(String orig, String dist) {File source = new File(this.getRoot() + "/" + orig);File targer = new File(this.getRoot() + "/" + dist);source.renameTo(targer);}@Overridepublic void save(String path, String source, boolean isDirectory) {File file = new File(path);if (isDirectory) {if (!file.exists()) {file.mkdir();// 创建目录}} else {try {if (!file.exists()) {file.createNewFile();}} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}BufferedWriter writer = null;FileOutputStream output =null; OutputStreamWriter stream =null;try {output =new FileOutputStream(path);stream =new OutputStreamWriter(output,"UTF-8");writer = new BufferedWriter(stream);writer.write(source);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {try {writer.close();stream.close();output.close(); } catch (IOException e) {e.printStackTrace();}}}}@Overridepublic void update(String path, String source) {File file = new File(path);if (file.isFile() && file.exists()) {BufferedWriter writer = null;FileOutputStream output =null; OutputStreamWriter stream =null;try {output =new FileOutputStream(path);stream =new OutputStreamWriter(output,"UTF-8");writer = new BufferedWriter(stream);writer.write(source);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {try {writer.close();stream.close();output.close(); } catch (IOException e) {e.printStackTrace();}}}}@Overridepublic void save(String path, String source) {// TODO Auto-generated method stub}@Overridepublic boolean isCheckPath(String path) {// TODO Auto-generated method stubif (path != null && !path.trim().equals("")&& path.startsWith(this.getRoot())) {return true;}return false;}public String getRoot() {return root;}public void setRoot(String root) {this.root = root;}}

package com.manage.tpl;import java.io.File;import java.io.IOException;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import org.apache.commons.io.FileUtils;import com.manage.util.Constant;public class FileTpl implements Tpl {private File file;// 应用的根目录private String root;public FileTpl(File file, String root) {this.file = file;this.root = root;}public String getName() {return file.getName();}public String getPath() {return "/"+getName();}public String getFilename() {return file.getName();}public String getSource() {if (file.isDirectory()) {return null;}try {return FileUtils.readFileToString(this.file, Constant.TPL_ENCODE);} catch (IOException e) {throw new RuntimeException(e);}}public String getLastModifiedDate() {DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return format.format(new Date(this.getLastModified()));}public long getLength() {return file.length();}public int getSize() {return (int) (getLength() / 1024) + 1;}public boolean isDirectory() {return file.isDirectory();}@Overridepublic long getLastModified() {// TODO Auto-generated method stubreturn file.lastModified();}}

package com.manage.tpl;import java.io.File;import java.io.IOException;import java.sql.Timestamp;import java.util.Date;import org.apache.commons.io.FileUtils;import com.manage.util.Constant;/** * 父目录是文件异常 *  * 当移动文件或创建文件时，父目录也是文件，可以导致该异常。 *  * @author liufang *  */@SuppressWarnings("serial")public class ParentDirIsFileExceptioin extends RuntimeException {private String parentDir;/** * @param parentDir *            The parent dir, which is a file. */public ParentDirIsFileExceptioin(String parentDir) {this.parentDir = parentDir;}@Overridepublic String getMessage() {return "parent directory is a file: " + parentDir;}/** * Get the parent dir, which is a file. *  * @return */public String getParentDir() {return parentDir;}}