大家在使用maven或者IDE intellij的時候，可能會碰到類似下面的錯誤：
maven：
[ERROR] /E:/Workspace/pga/src/main/java/com/huonet/common/search/CriteriaSearchProperties.java:[1,1] E:\Workspace\pga\src\main\java\com\huonet\common\search\CriteriaSearchProperties.java:1: 非法字符： \65279
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
intellij：
Information:Using javac 1.7.0_45 to compile java sources
Information:java: Errors occurred while compiling module 'pga_tour'
Information:2016/9/5 11:46 - Compilation completed with 100 errors and 0 warnings in 8s 228ms
E:\Workspace\pga_tour\src\com\marathon\web\back\SendMailController.java
Error:(1, 1) java: 非法字符: \65279
Error:(1, 10) java: 需要class, interface或enum
以下是以intellij的出錯信息爲例的解決步驟：
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1、將出錯信息複製到EditPlus編輯器，例如intellij的出錯信息：
Information:Using javac 1.7.0_45 to compile java sources
Information:java: Errors occurred while compiling module 'pga_tour'
Information:2016/9/5 11:46 - Compilation completed with 100 errors and 0 warnings in 8s 228ms
E:\Workspace\pga_tour\src\com\marathon\web\back\SendMailController.java
Error:(1, 1) java: 非法字符: \65279
Error:(1, 10) java: 需要class, interface或enum
E:\Workspace\pga_tour\src\com\huonet\common\fckeditor\ConnectorServlet.java
Error:(1, 1) java: 非法字符: \65279
Error:(6, 9) java: 需要class, interface或enum
..............................
2、使用快捷鍵CTRL+H進行全局替換（因爲使用的是正則替換，所以需要選中Regular expression）：
例如上面的錯誤可以使用Find What：Error.+\n 以及 Replace爲空進行替換，剩餘的一小部分手動刪除即可
3、這時候文件裏保存內容的就是所有出錯文件的路徑了，保存爲文件存到某目錄下。
4、編寫java對文件的出錯路徑進行處理，以下爲代碼內容
UnicodeReader.java：
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PushbackInputStream;
import java.io.Reader;
/**
- changed BOM recognition ordering (longer boms first)
網絡地址：http://koti.mbnet.fi/akini/java/unicodereader/UnicodeReader.java.txt
Original pseudocode : Thomas Weidenfeller
Implementation tweaked: Aki Nieminen
http://www.unicode.org/unicode/faq/utf_bom.html
BOMs:
00 00 FE FF = UTF-32, big-endian
FF FE 00 00 = UTF-32, little-endian
EF BB BF = UTF-8,
FE FF = UTF-16, big-endian
FF FE = UTF-16, little-endian
Win2k Notepad:
Unicode format = UTF-16LE
***/
/**
* Generic unicode textreader, which will use BOM mark
* to identify the encoding to be used. If BOM is not found
* then use a given default or system encoding.
*/
public class UnicodeReader extends Reader {
PushbackInputStream internalIn;
InputStreamReader internalIn2 = null;
String defaultEnc;
private static final int BOM_SIZE = 4;
/**
*
* @param in inputstream to be read
* @param defaultEnc default encoding if stream does not have
* BOM marker. Give NULL to use system-level default.
*/
UnicodeReader(InputStream in, String defaultEnc) {
internalIn = new PushbackInputStream(in, BOM_SIZE);
this.defaultEnc = defaultEnc;
}
public String getDefaultEncoding() {
return defaultEnc;
}
/**
* Get stream encoding or NULL if stream is uninitialized.
* Call init() or read() method to initialize it.
*/
public String getEncoding() {
if (internalIn2 == null) return null;
return internalIn2.getEncoding();
}
/**
* Read-ahead four bytes and check for BOM marks. Extra bytes are
* unread back to the stream, only BOM bytes are skipped.
*/
protected void init() throws IOException {
if (internalIn2 != null) return;
String encoding;
byte bom[] = new byte[BOM_SIZE];
int n, unread;
n = internalIn.read(bom, 0, bom.length);
if ( (bom[0] == (byte)0x00) && (bom[1] == (byte)0x00) &&
(bom[2] == (byte)0xFE) && (bom[3] == (byte)0xFF) ) {
encoding = "UTF-32BE";
unread = n - 4;
} else if ( (bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE) &&
(bom[2] == (byte)0x00) && (bom[3] == (byte)0x00) ) {
encoding = "UTF-32LE";
unread = n - 4;
} else if ( (bom[0] == (byte)0xEF) && (bom[1] == (byte)0xBB) &&
(bom[2] == (byte)0xBF) ) {
encoding = "UTF-8";
unread = n - 3;
} else if ( (bom[0] == (byte)0xFE) && (bom[1] == (byte)0xFF) ) {
encoding = "UTF-16BE";
unread = n - 2;
} else if ( (bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE) ) {
encoding = "UTF-16LE";
unread = n - 2;
} else {
// Unicode BOM mark not found, unread all bytes
encoding = defaultEnc;
unread = n;
}
//System.out.println("read=" + n + ", unread=" + unread);
if (unread > 0) internalIn.unread(bom, (n - unread), unread);
// Use given encoding
if (encoding == null) {
internalIn2 = new InputStreamReader(internalIn);
} else {
internalIn2 = new InputStreamReader(internalIn, encoding);
}
}
public void close() throws IOException {
init();
internalIn2.close();
}
public int read(char[] cbuf, int off, int len) throws IOException {
init();
return internalIn2.read(cbuf, off, len);
}
}Test.java：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test1 {
public static void main(String[] args) throws Exception{
List<String> pathList = getPerlineFileName("G://test.txt");
for(String path : pathList) {
readContentAndSaveWithEncoding(path,"UTF-8","UTF-8");
}
System.out.println("成功");
}
private static void readContentAndSaveWithEncoding(String filePath,String readEncoding,String saveEncoding) throws Exception{
saveContent(filePath,readContent(filePath,readEncoding),saveEncoding);
}
private static void saveContent(String filePath,String content,String encoding) throws Exception{
FileOutputStream fos = new FileOutputStream(filePath);
OutputStreamWriter w = new OutputStreamWriter(fos,encoding);
w.write(content);
w.flush();
}
private static String readContent(String filePath,String encoding) throws Exception{
FileInputStream file = new FileInputStream(new File(filePath));
BufferedReader br = new BufferedReader(new UnicodeReader(file, encoding));
String line = null;
String fileContent = "";
while((line = br.readLine()) != null) {
fileContent = fileContent + line;
fileContent += "\r\n";
}
return fileContent;
}
private static List<String> getPerlineFileName(String filePath) throws Exception{
FileInputStream file = new FileInputStream(new File(filePath));
BufferedReader br = new BufferedReader(new InputStreamReader(file,"UTF-8"));
String line = null;
List<String> list = new ArrayList<String>();
while((line = br.readLine()) != null) {
list.add(line);
}
return list;
}
}
5、將Test.java中的G://test.txt改爲第3步中保存的文件路徑及文件名運行即可