BOMRemover v2.0 去除代码中的UTF-8 BOM

org.xml.sax.SAXParseException: 缺少文件根组件。但是XML文件确实存在且格式正常.

原因: XML文件可能为UTF-8编码....且带有BOM签名..用UltraEdit等16进制工具打开XML,可看到前三字节为EF,BB,BF.

 

解决方法..找到此XML文件,删除BOM签名...

 

见我的 BOM批量删除工具 BOMRemoverV2.0

 

此工具来源于BOMRemover 在此基础上完美了下方法...主要增加了 noBomFile方法 ,以检测文件是否为BOM签名文件.

 

使用方法:

1.trimBom   去掉单个文件的BOM头

2.DealSrcFiles 去掉某个文件夹下的文件BOM头...

 

import java.io.BufferedReader;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;import java.io.PushbackInputStream;import java.util.ArrayList;import java.util.HashSet;import java.util.Iterator;import java.util.List;import java.util.Set;public class BOMRemover {/** * ant 编译之后的result文件，注意要编译提示错误的文件名要在同一行 可以设置命令提示窗口的缓冲区大小实现 * * @param resultFileName */public static Set getFileNamesFromCompileResult(String resultFileName)throws java.io.IOException {Set set = new HashSet();BufferedReader reader = new BufferedReader(new FileReader(resultFileName));String start = "[javac] ";int startLen = start.length();String end = ".java:";int endLen = end.length();String errMsg = "//65279";while (reader.ready()) {String line = reader.readLine();int indexStart = line.indexOf(start);if (line.indexOf(errMsg) == -1) {continue;}if (indexStart != -1) {int indexEnd = line.indexOf(end);if (indexEnd != -1) {String name = line.substring(indexStart + startLen,indexEnd + endLen - 1);set.add(name.trim());}}}return set;}//trim dirpublic static void DealSrcFiles(String path) {if (path.charAt(path.length() - 1) != '//') {path += '//';}File file = new File(path);if (!file.exists()) {System.out.println("Error: Path not Existed! Please Check it out!");return;}String[] filelist = file.list();for (int i = 0; i < filelist.length; i++) {File temp = new File(path + filelist[i]);if ((temp.isDirectory() && !temp.isHidden() && temp.exists())) {DealSrcFiles(path + filelist[i]);} else {if (filelist[i].endsWith(".xml")) {try {// System.out.println(path + filelist[i]);trimBom(path + filelist[i]);} catch (Exception eee) {System.out.println(eee.getMessage());}}}}}/** * 读取流中前面的字符，看是否有bom，如果有bom，将bom头先读掉丢弃 * * @param in * @return * @throws IOException */public static InputStream getInputStream(InputStream in) throws IOException {PushbackInputStream testin = new PushbackInputStream(in);int ch = testin.read();if (ch != 0xEF) {testin.unread(ch);} else if ((ch = testin.read()) != 0xBB) { // if ch==0xeftestin.unread(ch);testin.unread(0xef);} else if ((ch = testin.read()) != 0xBF) { // if ch ==0xbbthrow new IOException("错误的UTF-8格式文件");} else { // if ch ==0xbf// 不需要做，这里是bom头被读完了// // System.out.println("still exist bom");}return testin;}/** * 根据一个文件名，读取完文件，干掉bom头。 * * @param fileName * @throws IOException */public static void trimBom(String fileName) throws IOException {if (noBomFile(fileName)) {System.out.println("skip :" + fileName);return;}FileInputStream fin = new FileInputStream(fileName);// 开始写临时文件InputStream in = getInputStream(fin);ByteArrayOutputStream bos = new ByteArrayOutputStream();byte b[] = new byte[4096];int len = 0;while (in.available() > 0) {len = in.read(b, 0, 4096);// out.write(b, 0, len);bos.write(b, 0, len);}in.close();fin.close();bos.close();// 临时文件写完，开始将临时文件写回本文件。 System.out.println("[" + fileName + "]");FileOutputStream out = new FileOutputStream(fileName);out.write(bos.toByteArray());out.close();System.out.println("PROCESS FILE " + fileName);}// check the file is or not bom fileprivate static boolean noBomFile(String fname) throws IOException {FileInputStream fin = new FileInputStream(fname);PushbackInputStream testin = new PushbackInputStream(fin);int ch = testin.read();int ch2 = testin.read();int ch3 = testin.read();if (ch == 0xEF && ch2 == 0xBB && ch3 == 0xBF) { return false; // is bom file} else { return true;}}/** * 根据ant编译错误来去除bom * * @param resultFile * @throws IOException */// public static void trimBomByCompileResult(String resultFile)// throws IOException {// Set set = getFileNamesFromCompileResult(resultFile);//// for (Iterator it = set.iterator(); it.hasNext();) {// String fName = it.next().toString();// trimBom(fName);// }//// }public static void main(String[] args) throws IOException {// if(args.length==0){// DealSrcFiles(System.getProperty("user.dir"));// }// else{// DealSrcFiles(args[0]);// }String path = "D://Documents and Settings//Administrator//桌面//0301//de bom xml";DealSrcFiles(path);}}

 

 

 

原工具来源于 http://hi.baidu.com/joyfun/blog/item/ca926f06c40cc0710308815b.html

去除java代码中的UTF-8 BOM