Properties类读写.properties配置文件

package com.hzk.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.Properties;

public class PropertiesTools {

public static void writeProperties(String filePath, String parameterName,
    String parameterValue) {
   Properties props = new Properties();
   try {
    File f = new File(filePath);

    if (f.exists()) {

     InputStream fis = new FileInputStream(filePath);
     props.load(fis);
     fis.close();

    } else {
     System.out.println(filePath);
     f.createNewFile();
    }

    OutputStream fos = new FileOutputStream(filePath);
    props.setProperty(parameterName, parameterValue);

    props.store(fos, "");
    fos.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
}

public static Properties readProperties(String filePath) {
   Properties props = new Properties();
   InputStream is;
   try {
    is = new FileInputStream(filePath);
    props.load(is);
    is.close();
    return props;
   } catch (Exception e1) {
    e1.printStackTrace();
    return null;
   }

}

/**
 * 写之前将编码转为iso-8859-1,.propertise的默认编码
 * @param data
 * @return
 */
public static String iso2utf8(String data){
	String result = "";
	try {
		result =  new String(data.getBytes("iso-8859-1"), "utf-8");
	} catch (UnsupportedEncodingException e) {
		e.printStackTrace();
	}
	return result;
}

/**
 * 读数据的时候转码为utf-8。便于读取
 * @param data
 * @return
 */
public static String utf82iso(String data){
	String result = null;
	try {
		result =  new String(data.getBytes("utf-8"), "iso-8859-1");
	} catch (UnsupportedEncodingException e) {
		e.printStackTrace();
	}
	return result;
}

public static void main(String[] args) {
   PropertiesTools.writeProperties("d:\datas.properties", utf82iso("name"), utf82iso("tom"));
   PropertiesTools.writeProperties("d:\datas.properties", utf82iso("好这口"),utf82iso("hzk"));
   PropertiesTools.writeProperties("d:\datas.properties", utf82iso("hk"),utf82iso("户口"));
   Properties props = PropertiesTools.readProperties("d:\datas.properties");
   Enumeration en = props.keys();
   while (en.hasMoreElements()) {
    String key = (String) en.nextElement();
    String keyDecode = iso2utf8(key);
    String value =iso2utf8((String) props.getProperty(key));
    System.out.println("key:"+keyDecode+"   value:"+value);
   }
}

}

如上面代码所看到的。注意新建的properties文件的默认编码是iso-8859-1，所以想读写中文数据。都要转码，对于中文会显示成一下形式，见datas.properties：

#
#Sat Jun 14 15:38:10 CST 2014
hk=u00E6u0088u00B7u00E5u008Fu00A3
name=tom
u00E5u00A5u00BDu00E8u00BFu0099u00E5u008Fu00A3=hzk

假设在myeclipse中保存为utf-8形式，再次能够手动输入中文就能够，可是下次一经代码写入再打开又会变为iso-8859-1的乱码，非常是蛋疼，所以要看中文能够通过代码读取转为utf-8，或者只先存为utf-8格式，编辑中文，不要代码写入中文就能够