PropertyTool

simonsun

                               
               
               
                //网罗到的一个不错的处理配置文件的类。
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Properties;
public class PropertyTool {
    // 根据key读取value
    public static String readValue(String filePath, String key) {
        Properties props = new Properties();
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(
                    filePath));
            props.load(in);
            String value = props.getProperty(key);
            System.out.println(key + value);
            return value;
        } catch (Exception e) {
            return null;
        }
    }
    // 读取properties的全部信息
    public static void readProperties(String filePath) {
        Properties props = new Properties();
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(
                    filePath));
            props.load(in);
            Enumeration en = props.propertyNames();
            while (en.hasMoreElements()) {
                String key = (String) en.nextElement();
                String Property = props.getProperty(key);
                System.out.println(key + Property);
            }
        } catch (Exception e) {
        }
    }
    // 写入properties信息
    public static void writeProperties(String filePath, String parameterName,
            String parameterValue) {
        Properties prop = new Properties();
        try {
            InputStream fis = new FileInputStream(filePath);
            // 从输入流中读取属性列表（键和元素对）
            prop.load(fis);
            // 调用 Hashtable 的方法 put。使用 getProperty 方法提供并行性。
            // 强制要求为属性的键和值使用字符串。返回值是 Hashtable 调用 put 的结果。
            OutputStream fos = new FileOutputStream(filePath);
            prop.setProperty(parameterName, parameterValue);
            // 以适合使用 load 方法加载到 Properties 表中的格式，
            // 将此 Properties 表中的属性列表（键和元素对）写入输出流
            prop.store(fos, "Update '" + parameterName + "' value");
        } catch (IOException e) {
//            System.err.println("Visit " + filePath + " for updating "
//                    + parameterName + " value error");
        }
    }
    public static void main(String[] args) {
        String address = "E:\\eclipse_work\\MSSQLSERVER.properties";
        readValue(address, "MSDBURL");
        writeProperties(address, "aaaaa", "的");
        readProperties(address);
        System.out.println("OK");
    }
}
               
               
               

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/32417/showart_1131233.html