【文件属性】：
文件名称：Java文件处理工具类--FileUtil
文件大小：2KB
文件格式：RAR
更新时间：2013-02-03 12:26:33
java,file,文件处理,文件写入，文件读取,文件处理
package com.hexiang.utils;
import java.io.*;
/**
* FileUtil. Simple file operation class.
*
* @author BeanSoft
*
*/
public class FileUtil {
/**
* The buffer.
*/
protected static byte buf[] = new byte[1024];
/**
* Read content from local file. FIXME How to judge UTF-8 and GBK, the
* correct code should be: FileReader fr = new FileReader(new
* InputStreamReader(fileName, "ENCODING")); Might let the user select the
* encoding would be a better idea. While reading UTF-8 files, the content
* is bad when saved out.
*
* @param fileName -
* local file name to read
* @return
* @throws Exception
*/
public static String readFileAsString(String fileName) throws Exception {
String content = new String(readFileBinary(fileName));
return content;
}
/**
* 读取文件并返回为给定字符集的字符串.
* @param fileName
* @param encoding
* @return
* @throws Exception
*/
public static String readFileAsString(String fileName, String encoding) throws Exception {
String content = new String(readFileBinary(fileName), encoding);
return content;
}
/**
* 读取文件并返回为给定字符集的字符串.
* @param fileName
* @param encoding
* @return
* @throws Exception
*/
public static String readFileAsString(InputStream in) throws Exception {
String content = new String(readFileBinary(in));
return content;
}
/**
* Read content from local file to binary byte array.
*
* @param fileName -
* local file name to read
* @return
* @throws Exception
*/
public static byte[] readFileBinary(String fileName) throws Exception {
FileInputStream fin = new FileInputStream(fileName);
return readFileBinary(fin);
}
/**
* 从输入流读取数据为二进制字节数组.
* @param streamIn
* @return
* @throws IOException
*/
public static byte[] readFileBinary(InputStream streamIn) throws IOException {
BufferedInputStream in = new BufferedInputStream(streamIn);
ByteArrayOutputStream out = new ByteArrayOutputStream(10240);
int len;
while ((len = in.read(buf)) >= 0)
out.write(buf, 0, len);
in.close();
return out.toByteArray();
}
/**
* Write string content to local file.
*
* @param fileName -
* local file name will write to
* @param content
* String text
* @return true if success
* @throws IOException
*/
public static boolean writeFileString(String fileName, String content)
throws IOException {
FileWriter fout = new FileWriter(fileName);
fout.write(content);
fout.close();
return true;
}
/**
* Write string content to local file using given character encoding.
*
* @param fileName -
* local file name will write to
* @param content
* String text
* @param encoding
* the encoding
* @return true if success
* @throws IOException
*/
public static boolean writeFileString(String fileName, String content,
String encoding) throws IOException {
OutputStreamWriter fout = new OutputStreamWriter(new FileOutputStream(
fileName), encoding);
fout.write(content);
fout.close();
return true;
}
/**
* Write binary byte array to local file.
*
* @param fileName -
* local file name will write to
* @param content
* binary byte array
* @return true if success
* @throws IOException
*/
public static boolean writeFileBinary(String fileName, byte[] content)
throws IOException {
FileOutputStream fout = new FileOutputStream(fileName);
fout.write(content);
fout.close();
return true;
}
/**
* 检查文件名是否合法.文件名字不能包含字符\/:*?"<>|
*
* @param fileName文件名,不包含路径
* @return boolean is valid file name
*/
public static boolean isValidFileName(String fileName) {
boolean isValid = true;
String errChar = "\\/:*?\"<>|"; //
if (fileName == null || fileName.length() == 0) {
isValid = false;
} else {
for (int i = 0; i < errChar.length(); i++) {
if (fileName.indexOf(errChar.charAt(i)) != -1) {
isValid = false;
break;
}
}
}
return isValid;
}
/**
* 把非法文件名转换为合法文件名.
*
* @param fileName
* @return
*/
public static String replaceInvalidFileChars(String fileName) {
StringBuffer out = new StringBuffer();
for (int i = 0; i < fileName.length(); i++) {
char ch = fileName.charAt(i);
// Replace invlid chars: \\/:*?\"<>|
switch (ch) {
case '\\':
case '/':
case ':':
case '*':
case '?':
case '\"':
case '<':
case '>':
case '|':
out.append('_');
break;
default:
out.append(ch);
}
}
return out.toString();
}
/**
* Convert a given file name to a URL(URI) string.
*
* @param fileName -
* the file to parse
* @return - URL string
*/
public static String filePathToURL(String fileName) {
String fileUrl = new File(fileName).toURI().toString();
return fileUrl;
}
/**
* Write string content to local file.
*
* @param fileName -
* local file name will write to
* @param content
* String text
* @return true if success
* @throws IOException
*/
public static boolean appendFileString(String fileName, String content)
throws IOException {
OutputStreamWriter fout = new OutputStreamWriter(new FileOutputStream(
fileName, true), "GBK");
fout.write(content);
fout.close();
return true;
}
public static void main(String[] args) {
System.out.println(replaceInvalidFileChars("http://www.abc.com/"));
}
}
【文件预览】：
FileUtil.java
网友评论
- 不怎么样。。。
- 不错好用，解决了我的问题，感谢~