正文
检索源码 删除无用Properties的小工具
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背景：
重新做项目的过程中，引用了大量旧代码。尤其是Properties文件，里面肯定有一批是无用的，干脆笨办法直接扫描源码文件来过滤。
后续在此基础上修改修改，再做个扫描无用image文件的类。
代码如下：
public class PropertiesCleaner {
private static final String PROPERTIE_FILE = "D:\\Workspaces\\WebRoot\\WEB-INF\\classes\\lang_zh_TW.properties";
private static final String SRC_FOLDER = "D:\\Workspaces\\WebRoot";
private ArrayList<String> propertiesKeys = new ArrayList<String>();
private ArrayList<File> sourceFiles = new ArrayList<File>();
private ArrayList<String> deleteKeys = new ArrayList<String>();
private static boolean isShowUsing = false;
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new PropertiesCleaner().run();
}
public void run() {
try {
loadAllProperties(PROPERTIE_FILE);
getAllFiles(new File(SRC_FOLDER));
System.out.println("Get source files count: " + sourceFiles.size());
searchFilesForProperties();
deleteProperties();
}catch (Exception e) {
e.printStackTrace();
}
}
private void loadAllProperties(String filePath) throws IOException {
Properties pps = new Properties();
InputStream in = new BufferedInputStream(new FileInputStream(filePath));
pps.load(in);
Enumeration en = pps.propertyNames();
while(en.hasMoreElements()) {
String strKey = (String) en.nextElement();
propertiesKeys.add(strKey);
//System.out.println(strKey);
//String strValue = pps.getProperty(strKey);
//System.out.println(strKey + "=" + strValue);
}
System.out.println("Get properties key count: " + propertiesKeys.size());
}
private void getAllFiles(File file){
File[] fs = file.listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) {
if(pathname.isDirectory())
return true;
String name = pathname.getName();
return name.endsWith(".java") || name.endsWith(".html") || name.endsWith(".js");
}
});
for(File f:fs){
if(f.isDirectory())
getAllFiles(f);
if(f.isFile()) {
sourceFiles.add(f);
//System.out.println(f);
}
}
}
private void searchFilesForProperties() {
int usedTimes = 0;
int notUsedTimes = 0;
for (String keyStr : propertiesKeys) {
boolean isUsing = false;
for (File file : sourceFiles) {
isUsing = isUsing || searchFileForKey(file, keyStr);
}
if(!isUsing) {
//System.out.println("Properties " + keyStr + " is not used anymore.");
notUsedTimes ++;
deleteKeys.add(keyStr);
} else {
usedTimes ++;
}
}
if (isShowUsing) {
System.out.println(usedTimes + " properties are using.");
}
System.out.println(notUsedTimes + " properties not used anymore.");
}
private boolean searchFileForKey(File file, String keyword){
LineNumberReader reader = null;
int times = 0;
try {
reader = new LineNumberReader(new FileReader(file));
String readLine = null;
ArrayList<String> lines = new ArrayList<String>();
while((readLine = reader.readLine()) != null) {
// int index = 0;
// int next = 0;
/*
while((index = readLine.indexOf(keyword,next)) != -1) {
next = index + keyword.length();
times++;
}
if(times > 0) {
System.out.println("No." + reader.getLineNumber() + " line: has " + times + " times");
}
*/
if(readLine.indexOf(keyword) != -1) {
times++;
lines.add(reader.getLineNumber() + ": " + readLine);
}
}
if(times > 0) {
if (isShowUsing) {
System.out.println("Found " + keyword + " " + times + " in file " + file.getName());
for (String str : lines) {
System.out.println(" " + str);
}
System.out.println();
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (reader != null)
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return times > 0;
}
private void deleteProperties() throws IOException, FileNotFoundException {
if(deleteKeys.size() == 0)
return;
LineNumberReader reader = null;
BufferedWriter bw = null;
int times = 0;
try {
reader = new LineNumberReader(new FileReader(PROPERTIE_FILE));
String readLine = null;
ArrayList<String> lines = new ArrayList<String>();
bw = new BufferedWriter(new FileWriter(PROPERTIE_FILE+"_1"));
while((readLine = reader.readLine()) != null) {
boolean keyInLine = false;
for (String keyword : deleteKeys) {
keyInLine = keyInLine || readLine.indexOf(keyword) != -1;
}
if(!keyInLine) {
lines.add(readLine);
bw.write(readLine);
bw.newLine();
}
}
bw.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (reader != null)
reader.close();
if (bw != null)
bw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
deleteProperties()这个，本来想使用Properties来做删除。网上也查到了别人写的很不错的例子，还包含了encode这些。但用的时候发现，因为我的Properties文件里
全是unicode转码过的值，encode的时候会比较麻烦。干脆直接按行直接做删除处理。性能可能一般，但是好在思路直接。
