获取properties配置文件的值

  • Z时代
  • 2024-01-10
  • 分类：综合

编程

package com.util;
import org.apache.log4j.Logger;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
 * Properties文件读取工具类
 */
public class PropertiesUtil {
    private static Logger log = Logger.getLogger(PropertiesUtil.class);
    private Properties propertie;
    public PropertiesUtil(String filePath) {
        propertie = new Properties();
        InputStream inputFile = null;
        try {
            inputFile = getClass().getResourceAsStream(filePath);
            propertie.load(inputFile);
        } catch (FileNotFoundException e) {
            log.error("读取文件失败：" + e.getMessage());
        } catch (IOException e) {
            log.error("装载文件失败：" + e.getMessage());
        } finally {
            try {
                if (null != inputFile) {
                    inputFile.close();
                }
            } catch (IOException e) {
                log.error("关闭流失败：" + e.getMessage());
            }
        }
    }
    /**
     * 根据key获取value
     *
     * @param key
     * @return
     */
    public String getValue(String key) {
        if (propertie.containsKey(key)) {
            return propertie.getProperty(key);
        }
        return null;
    }
    /**
     * 根据指定资源路径加载单个资源文件,返回对应key的value值
     *
     * @param filePath 资源文件的路径的值
     * @param key
     * @return
     */
    public static String getValue(String filePath, String key) {
        String value = null;
        InputStream is = null;
        try {
            Properties properties = new Properties();
            is = new FileInputStream(filePath);
            properties.load(is);
            if (properties.containsKey(key)) {
                value = properties.getProperty(key);
            }
        } catch (FileNotFoundException e) {
            log.error("读取文件失败：" + e.getMessage());
        } catch (IOException e) {
            log.error("装载文件失败：" + e.getMessage());
        } catch (Exception e) {
            log.error("出错：" + e.getMessage());
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    log.error("关闭流失败：" + e.getMessage());
                }
            }
        }
        return value;
    }
    public static void main(String[] args) {
        PropertiesUtil propertiesUtil = new PropertiesUtil("/config.properties");
        System.out.println(propertiesUtil.getValue("test"));
        System.out.println(PropertiesUtil.getValue("E:/workspace-idea/project/src/config.properties", "test"));
    }
}

二、ResourceBundle获取

//注意Properties文件不需要带后缀名
ResourceBundle resource = ResourceBundle.getBundle("config");
System.out.println(resource.getString("test"));

三、使用spring注解获取

@Value("${test}")
private String test;

 

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