public class FileOperations {
/**
* 验证文件是否存在目录中
* @param targetPath 目标文件路径,包含文件全名称，包含后缀
* @return 0 默认,1 参数错误，2 存在文件,3 不存在文件
*/
public int checkFileExists(String targetPath){
int result = 0;
if(targetPath == null || "".equals(targetPath) || targetPath.indexOf(".") <= 0){
l.info("<<== check File Exists -- path Error : "+ targetPath);
return 1;
}
try{
File checkFile = new File(targetPath);
if(checkFile.exists()){
result = 2;
}else{
result = 3;
}
}catch(Exception e){
l.error("<<== check File Exists Exception : "+ e);
}
return result;
}
/**
* 删除目标目录下文件
* @param targetPath 目标文件路径,包含文件全名称，包含后缀
* @return 0 默认,1 参数错误，2 删除文件成功,3 删除文件失败
*/
public int deleteFile(String targetPath) {
int result = 0;
if(targetPath == null || "".equals(targetPath) || targetPath.indexOf(".") <= 0){
l.info("<<== delete File -- path Error : "+ targetPath);
return 1;
}
try {
File delFile = new File(targetPath);
if (delFile.delete()) {
result = 2;
}else{
result = 3;
}
} catch (Exception e) {
l.error("<<== delete File Exception : " + e);
}
return result;
}
/**
* 更换目标目录下文件名称
* @param targetPath 目标文件路径,及要操作的文件目录
* @param oldName 要更改的文件名
* @param newName 更改为的文件名
* @return 0 默认,1 参数错误，2 更改文件名称成功,3 更改文件名称失败
*/
public int reNameFile(String targetPath, String oldName, String newName) {
int result = 0;
if (targetPath == null || "".equals(targetPath) || oldName == null || "".equals(oldName) || oldName.indexOf(".") <= 0 || newName == null || "".equals(newName) || newName.indexOf(".") <= 0 ) {
l.info("<<== reName File -- param Error! targetPath=" + targetPath + "--oldName=" + oldName + "--newName=" + newName);
return 1;
}
StringBuffer strBuff = new StringBuffer();
try {
//获得源文件流
strBuff.delete(0, strBuff.length());
strBuff.append(targetPath).append(oldName);
File reNameFile = new File(strBuff.toString());
//获得更改文件流
strBuff.delete(0, strBuff.length());
strBuff.append(targetPath).append(newName);
File newNameFile = new File(strBuff.toString());
//执行更改，返回更改结果
if(reNameFile.renameTo(newNameFile)) {
result = 2;
}else{
result = 3;
}
} catch(SecurityException e){
l.error("<<== file Operation Is Limited!--SecurityException : " + e);
} catch (Exception e) {
l.error("<<== reName File Exception : " + e);
}
return result;
}
/**
* 获得文件后缀
* @param fileAllName 文件全名称
* @return 文件后缀
*/
public String getSuffix(String fileAllName,String defaultSuffix){
String suffix = defaultSuffix;
if(fileAllName == null || "".equals(fileAllName) || fileAllName.lastIndexOf(".") <= 0){
l.info("<<== getSuffix fileAllName Error! fileAllName=" + fileAllName);
return suffix;
}
suffix = fileAllName.substring(fileAllName.lastIndexOf("."));
return suffix;
}
/**
* 将文件存储到缓存文件夹
* @param fileAllName 文件全名称，包含文件名
* @param fileCount 所要写入文件的内容
* @return 是否创建文件，并成功写入内容
*/
public boolean putFileToCahce(String fileAllName,StringBuilder fileCount){
boolean result = false;
StringBuffer cachePath = new StringBuffer().append(XingbookConfig.sto_path).append(XingbookConfig.icon_srcPath).append(fileAllName);
String targetPath = cachePath.toString();//完整存储名称
if(checkFileExists(targetPath) == 2){
if(deleteFile(targetPath) == 2){
l.info("<<== file is have,delete it success!");
}
}
result = FileUtil.writeFile(targetPath, fileCount, "UTF-8");
return result;
}
/**
* 从指定地点读取文件内容
* @param fileName 文件全路径
* @return String 读取内容串，null 读取失败
*/
public static String readTextFile(String fileName) {
File file = new File(fileName);
BufferedReader reader = null;
StringBuffer out = null;
try {
reader = new BufferedReader(new FileReader(file));
String tmp = null;
out = new StringBuffer();
while ((tmp = reader.readLine()) != null) {
out.append(tmp);
}
reader.close();
} catch (IOException e) {
out = null;
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
l.info("<<== read text file is error!");
}
}
}
if (out != null) {
return out.toString();
}
return null;
}
/**
* 从指定地点读取文件大小
* @param fileName 文件全路径
* @return >0:文件真实大小(单位K), 0:错误；
*/
public long getFileSize(String fileName){
if(checkFileExists(fileName) == 2){
File file = new File(fileName);
long size = file.length();
if(size > 0){
return size;
}
}
return 0;
}
