PropertiesHelper.java

package com.xiongyingqi.util;

import java.io.*;
import java.util.*;

/**
 * 属性帮助类
 * Created by xiongyingqi on 14-3-7.
 */
public class PropertiesHelper {

    /**
     * 读取属性文件
     *
     * @param propertiesFilePath
     */
    public static Map<String, String> readProperties(String propertiesFilePath) {
        return readProperties(new File(propertiesFilePath));
    }

    /**
     * 读取属性文件
     *
     * @param propertiesFile
     */
    public static Map<String, String> readProperties(File propertiesFile) {
        if (!propertiesFile.exists()) {
            return null;
        }
        InputStream inputStream = null;
        try {
            inputStream = new FileInputStream(propertiesFile);
            return readProperties(inputStream);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    public static Map<String, String> readProperties(InputStream inputStream) {
        Map<String, String> propertiesMap = null;
        try {
            propertiesMap = new LinkedHashMap<String, String>();

            Properties properties = new Properties();
            properties.load(inputStream);

            Enumeration<?> enumeration = properties.propertyNames();
            while (enumeration.hasMoreElements()) {
                String key = (String) enumeration.nextElement();
                String value = (String) properties.get(key);
                propertiesMap.put(key, value);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return propertiesMap;
    }

    public static void save(Map<String, String> map, File file) throws IOException {
        Assert.notNull(map, "属性集合为空！");
        Properties properties = new Properties();
        Set<Map.Entry<String, String>> entries = map.entrySet();
        for (Map.Entry<String, String> entry : entries) {
            String key = entry.getKey();
            String value = entry.getValue();
            properties.setProperty(key, value);
        }
        save(properties, file);
    }

    public static void save(Properties properties, File file) throws IOException {
        Assert.notNull(properties, "存储的属性为空！");
        OutputStream outputStream = new FileOutputStream(file);
        properties.store(outputStream, "saved on " + DateHelper.getStringDate());
        outputStream.flush();
        outputStream.close();
    }

    public static void main(String[] args) throws IOException {
        File file = new File("test.properties");
        Map<String, String> map = readProperties(file);
        map.put("a", "测试");
        save(map, file);


//        File xmlFile = new File("test.xml");
//	    EntityHelper.print(file.getCanonicalPath());
//        System.out.println(file.exists());
//        FileOutputStream fileOutputStream = new FileOutputStream(file);
//        FileOutputStream fileOutputStreamXml = new FileOutputStream(xmlFile);
//        Properties properties = new Properties();
//        properties.put("test", "test");
//        properties.put("test2", "test");
//        properties.put("test3", "test");
//        properties.store(fileOutputStream, "属性测试");
//        properties.storeToXML(fileOutputStreamXml, "属性测试");
//        fileOutputStream.flush();
//        fileOutputStream.close();
//        fileOutputStreamXml.flush();
//        fileOutputStreamXml.close();
    }
}