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());}}