Property文件读取的Util类

Property文件以字符串形式保存数据。

这个类可以从Property文件中读取各种转换后的常见对象，可以继续扩展。

 

package com.arui.util;
import java.io.File;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import java.util.TimeZone;
public class PropertiesUtil extends Properties {
	private static final long serialVersionUID = -1810519669397594359L;
	/**
	 * Default constructor.
	 */
	public PropertiesUtil() {
	}
	/**
	 * Load existing property.
	 */
	public PropertiesUtil(final Properties prop) {
		super(prop);
	}
	/**
	 * Get boolean value.
	 */
	public boolean getBoolean(final String str) throws Exception {
		String prop = getProperty(str);
		if (prop == null) {
			throw new Exception(str + " not found");
		}
		return prop.toLowerCase().equals("true");
	}
	/**
	 * Get boolean value.
	 */
	public boolean getBoolean(final String str, final boolean bol) {
		try {
			return getBoolean(str);
		} catch (Exception ex) {
			return bol;
		}
	}
	/**
	 * Get integer value.
	 */
	public int getInteger(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return Integer.parseInt(value);
		} catch (NumberFormatException ex) {
			throw new Exception("PropertiesUtil.getInteger()", ex);
		}
	}
	/**
	 * Get integer value.
	 */
	public int getInteger(final String str, final int intVal) {
		try {
			return getInteger(str);
		} catch (Exception ex) {
			return intVal;
		}
	}
	/**
	 * Get long value.
	 */
	public long getLong(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return Long.parseLong(value);
		} catch (NumberFormatException ex) {
			throw new Exception("PropertiesUtil.getLong()", ex);
		}
	}
	/**
	 * Get long value.
	 */
	public long getLong(final String str, final long val) {
		try {
			return getLong(str);
		} catch (Exception ex) {
			return val;
		}
	}
	/**
	 * Get double value.
	 */
	public double getDouble(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return Double.parseDouble(value);
		} catch (NumberFormatException ex) {
			throw new Exception("PropertiesUtil.getDouble()", ex);
		}
	}
	/**
	 * Get double value.
	 */
	public double getDouble(final String str, final double doubleVal) {
		try {
			return getDouble(str);
		} catch (Exception ex) {
			return doubleVal;
		}
	}
	/**
	 * Get <code>InetAddress</code>.
	 */
	public InetAddress getInetAddress(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return InetAddress.getByName(value);
		} catch (UnknownHostException ex) {
			throw new Exception("Host " + value + " not found");
		}
	}
	/**
	 * Get <code>InetAddress</code>.
	 */
	public InetAddress getInetAddress(final String str, final InetAddress addr) {
		try {
			return getInetAddress(str);
		} catch (Exception ex) {
			return addr;
		}
	}
	/**
	 * Get <code>String</code>.
	 */
	public String getString(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		return value;
	}
	/**
	 * Get <code>String</code>.
	 */
	public String getString(final String str, final String s) {
		try {
			return getString(str);
		} catch (Exception ex) {
			return s;
		}
	}
	/**
	 * Get <code>File</code> object.
	 */
	public File getFile(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		return new File(value);
	}
	/**
	 * Get <code>File</code> object.
	 */
	public File getFile(final String str, final File fl) {
		try {
			return getFile(str);
		} catch (Exception ex) {
			return fl;
		}
	}
	/**
	 * Get <code>Class</code> object
	 */
	public Class<?> getClass(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return Class.forName(value);
		} catch (ClassNotFoundException ex) {
			throw new Exception("PropertiesUtil.getClass()", ex);
		}
	}
	/**
	 * Get <code>Class</code> object
	 */
	public Class<?> getClass(final String str, final Class<?> cls) {
		try {
			return getClass(str);
		} catch (Exception ex) {
			return cls;
		}
	}
	/**
	 * Get <code>TimeZone</code>
	 */
	public TimeZone getTimeZone(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		return TimeZone.getTimeZone(value);
	}
	/**
	 * Get <code>TimeZone</code>
	 */
	public TimeZone getTimeZone(final String str, final TimeZone tz) {
		try {
			return getTimeZone(str);
		} catch (Exception ex) {
			return tz;
		}
	}
	/**
	 * Get <code>DateFormat</code> object.
	 */
	public SimpleDateFormat getDateFormat(final String str) throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return new SimpleDateFormat(value);
		} catch (IllegalArgumentException e) {
			throw new Exception("Date format was incorrect: " + value, e);
		}
	}
	/**
	 * Get <code>DateFormat</code> object.
	 */
	public SimpleDateFormat getDateFormat(final String str,
			final SimpleDateFormat fmt) {
		try {
			return getDateFormat(str);
		} catch (Exception ex) {
			return fmt;
		}
	}
	/**
	 * Get <code>Date</code> object.
	 */
	public Date getDate(final String str, final DateFormat fmt)
			throws Exception {
		String value = getProperty(str);
		if (value == null) {
			throw new Exception(str + " not found");
		}
		try {
			return fmt.parse(value);
		} catch (ParseException ex) {
			throw new Exception("PropertiesUtil.getdate()", ex);
		}
	}
	/**
	 * Get <code>Date</code> object.
	 */
	public Date getDate(final String str, final DateFormat fmt, final Date dt) {
		try {
			return getDate(str, fmt);
		} catch (Exception ex) {
			return dt;
		}
	}
	/**
	 * Set boolean value.
	 */
	public void setProperty(final String key, final boolean val) {
		setProperty(key, String.valueOf(val));
	}
	/**
	 * Set integer value.
	 */
	public void setProperty(final String key, final int val) {
		setProperty(key, String.valueOf(val));
	}
	/**
	 * Set double value.
	 */
	public void setProperty(final String key, final double val) {
		setProperty(key, String.valueOf(val));
	}
	/**
	 * Set float value.
	 */
	public void setProperty(final String key, final float val) {
		setProperty(key, String.valueOf(val));
	}
	/**
	 * Set long value.
	 */
	public void setProperty(final String key, final long val) {
		setProperty(key, String.valueOf(val));
	}
	/**
	 * Set <code>InetAddress</code>.
	 */
	public void setInetAddress(final String key, final InetAddress val) {
		setProperty(key, val.getHostAddress());
	}
	/**
	 * Set <code>File</code> object.
	 */
	public void setProperty(final String key, final File val) {
		setProperty(key, val.getAbsolutePath());
	}
	/**
	 * Set <code>DateFormat</code> object.
	 */
	public void setProperty(final String key, final SimpleDateFormat val) {
		setProperty(key, val.toPattern());
	}
	/**
	 * Set <code>TimeZone</code> object.
	 */
	public void setProperty(final String key, final TimeZone val) {
		setProperty(key, val.getID());
	}
	/**
	 * Set <code>Date</code> object.
	 */
	public void setProperty(final String key, final Date val,
			final DateFormat fmt) {
		setProperty(key, fmt.format(val));
	}
	/**
	 * Set <code>Class</code> object.
	 */
	public void setProperty(final String key, final Class<?> val) {
		setProperty(key, val.getName());
	}
}

 

原文链接： http://blog.csdn.net/arui319/article/details/5783028