자바 io 스 트림 파일 작업
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;
}
@Override
public int delete(String[] names) {
// TODO Auto-generated method stub
File 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 block
e.printStackTrace();
}
} else if (file.isFile()) {
file.delete();
count++;
}
}
return 0;
}
/**
* 获取单个文件
*/
@Override
public Tpl get(String path) {
// TODO Auto-generated method stub
File 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);
}
}
@Override
public List<? extends Tpl> getListByPrefix(String prefix) {
return null;
}
@Override
public List<String> getNameListByPrefix(String prefix) {
// TODO Auto-generated method stub
return null;
}
@Override
public void rename(String orig, String dist) {
File source = new File(this.getRoot() + "/" + orig);
File targer = new File(this.getRoot() + "/" + dist);
source.renameTo(targer);
}
@Override
public 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 block
e1.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 block
e.printStackTrace();
} finally {
try {
writer.close();
stream.close();
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Override
public 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 block
e.printStackTrace();
} finally {
try {
writer.close();
stream.close();
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Override
public void save(String path, String source) {
// TODO Auto-generated method stub
}
@Override
public boolean isCheckPath(String path) {
// TODO Auto-generated method stub
if (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();
}
@Override
public long getLastModified() {
// TODO Auto-generated method stub
return 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;
}
@Override
public String getMessage() {
return "parent directory is a file: " + parentDir;
}
/**
* Get the parent dir, which is a file.
*
* @return
*/
public String getParentDir() {
return parentDir;
}
}
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