java对properties文件的读写

内部系统经常搞一个开关啊，参数配置神马的，有些时候可以用properties文件保存这些值，每次修改后写回文件去，上线时候不要覆盖此文件即可，主要代码。

 

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import java.io.*;
import java.util.Properties;

/**
 * 读写Property文件
 * User: yfzhangbin
 * Date: 13-8-7
 * Time: 上午10:08
 */
public class PropertyEditor {

    private String configFile; // 注入 appconfig.properties
    private static Properties p = new Properties();

    public void initProperties() { // init-method="initProperties"  bean实例化后被spring调用
        InputStream in = null;
        try {
            Resource resource = new ClassPathResource(configFile);
            in = resource.getInputStream();
            p.load(in);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public String read(String key, String defaultValue) {
        return p.getProperty(key, defaultValue);
    }

    public Integer readInt(String key) {
        return Integer.parseInt(read(key, "0"));
    }

    public void write(String key, Integer value) {
        write(key, Integer.toString(value));
    }

    public void write(String key, String value) {
        p.setProperty(key, value);
        OutputStream out = null;
        try {
            Resource resource = new ClassPathResource(configFile);
            out = new FileOutputStream(resource.getFile());
            p.store(out, "write from web console");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public void setConfigFile(String configFile) {
        this.configFile = configFile;
    }
}