添加sizeUtil和VarProperties

Author: xqs

src/main/java/com/devil/utils/SizeUtil.java

@@ -0,0 +1,41 @@
+package com.devil.utils;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+
+public class SizeUtil {
+	private ByteArrayOutputStream bos;
+	private ObjectOutputStream oos;
+
+	public SizeUtil() {
+		try {
+			bos = new ByteArrayOutputStream();
+			oos = new ObjectOutputStream(bos);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public int size(Object obj) {
+		try {
+			oos.writeObject(obj);
+			int size = bos.size();
+			bos.reset();
+			return size;
+		} catch (Throwable e) {
+			e.printStackTrace();
+			destroy();
+			return -1;
+		}
+	}
+
+	public void destroy() {
+		try {
+			oos.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

src/main/java/com/devil/utils/VarProperties.java

@@ -0,0 +1,61 @@
+package com.devil.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.io.StringReader;
+import java.util.Properties;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.Map.Entry;
+
+/**
+ * root=/a
+ * file=${root}/c
+ * @author xqs
+ */
+public class VarProperties extends Properties {
+	private static final long serialVersionUID = 1L;
+	private static final Pattern PATTERN = Pattern.compile("\\$\\{([^\\}]+)\\}");
+	
+	public static void main(String[] args){
+		Properties prop=new VarProperties();
+		Reader reader = new StringReader("root=aaa\nfile=${root}/test");
+		try {
+			prop.load(reader);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		System.out.println(prop.getProperty("file"));
+	}
+	
+	@Override
+	public synchronized void load(InputStream inStream) throws IOException {
+		super.load(inStream);
+		for (Entry<Object, Object> entry : this.entrySet()) {
+			entry.setValue(getRealProperty((String) entry.getKey(), (String) entry.getValue()));
+		}
+	}
+	
+	@Override
+	public synchronized void load(Reader reader) throws IOException {
+		super.load(reader);
+		for (Entry<Object, Object> entry : this.entrySet()) {
+			entry.setValue(getRealProperty((String) entry.getKey(), (String) entry.getValue()));
+		}
+	}
+
+	private String getRealProperty(String key,String value){
+		Matcher matcher = PATTERN.matcher(value);
+		StringBuffer buffer = new StringBuffer();
+		while (matcher.find()) {
+			String matcherKey = matcher.group(1);
+			String matchervalue = this.getProperty(matcherKey);
+			if (matchervalue != null) {
+				matcher.appendReplacement(buffer, matchervalue);
+			}
+		}
+		matcher.appendTail(buffer);
+		return buffer.toString();
+	}
+}