propertiesunit.java

xml解析包,公司的xml使用类包

/*
 * 创建日期 2006-6-1
 */
package com.tjsoft.xml.parse;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;

/**
 * @author sun
 */
public class PropertiesUnit {
    private String filename;

    private Properties pros;

    private FileInputStream in;

    private FileOutputStream out;

    public Properties getPros() {
        if (pros == null) {
            pros = new Properties();
        }
        return pros;
    }

    public PropertiesUnit(String filename) {
        this.filename = filename;
        File file = new File(filename);
        try {
            in = new FileInputStream(file);
            getPros().load(in);
            in.close();
        } catch (FileNotFoundException e) {
            System.err.println("配置文件config.properties找不到！");
            e.printStackTrace();
        } catch (IOException e) {
            System.err.println("读取配置文件config.properties错误！");
            e.printStackTrace();
        }
    }

    public String getValue(String itemName) {
        return getPros().getProperty(itemName);
    }

    public String getValue(String itemName, String defaultValue) {
        return getPros().getProperty(itemName, defaultValue);
    }

    public void setValue(String itemName, String value) {
        getPros().setProperty(itemName, value);
    }

    public void saveFile(String filename, String description) throws Exception {
        try {
            File f = new File(filename);
            out = new FileOutputStream(f);
            getPros().store(out, description);
            out.close();
        } catch (IOException ex) {
            throw new Exception("无法保存指定的配置文件:" + filename);
        }
    }

    public void saveFile(String filename) throws Exception {
        saveFile(filename, "");
    }

    public void saveFile() throws Exception {
        if (filename.length() == 0)
            throw new Exception("需指定保存的配置文件名");
        saveFile(filename);
    }

    public void deleteValue(String value) {
        getPros().remove(value);
    }

    public static void main(String args[]) {
        String file = PropertiesUnit.class.getResource(
                "/database_config.properties").getPath();
        PropertiesUnit pu = new PropertiesUnit(file);
        System.out.println(pu.getPros());
    }

}