com.github.commons.utils.PropertyUtils Maven / Gradle / Ivy
package com.github.commons.utils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class PropertyUtils {
private static Properties properties;
private static final Logger LOGGER = LoggerFactory.getLogger(PropertyUtils.class);
public static void load(String path,String fileName){
//这里的path是项目文件的绝对路径
//先获取项目绝对路径：Thread.currentThread().getContextClassLoader().getResource("").getPath();
//然后在项目路径后面拼接"properties/sysConfig.properties";
properties= new Properties();// 属性集合对象
InputStream fis;
try {
LOGGER.debug(path);
if(StringUtils.isBlank(path)){
fis = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
}else{
fis = Thread.currentThread().getContextClassLoader().getResourceAsStream(path + "/" + fileName);
}
properties.load(fis);
fis.close();// 关闭流
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 获取properties文件对应的属性值
* @param path 文件的路径
* @param fileName 文件的名称
* @param key 对应的Key
* @return String key对应的值
*/
public static String getProperty(String path,String fileName,String key){
if(properties == null){
load(path,fileName);
LOGGER.debug("重新加载一遍");
}
InputStream fis = null;
try {
if(StringUtils.isBlank(path)){
fis = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
}else{
fis = Thread.currentThread().getContextClassLoader().getResourceAsStream(path + "/" + fileName);
}
properties.load(fis);// 将属性文件流装载到Properties对象中
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
fis.close();// 关闭流
} catch (IOException e) {
e.printStackTrace();
}
}
LOGGER.debug("查询到的"+key+"的值："+properties.getProperty(key));
return properties.getProperty(key);
}
/**
* 修改或新增properties文件对应的属性值
* @param path 文件路径
* @param fileName 文件名称
* @param key 对应的key
* @param value 修改的值
* @return Boolean 是否成功
*/
public static Boolean updateProperty(String path,String fileName,String key,String value){
if(properties==null){
load(path,fileName);
LOGGER.debug("修改前重新加载一遍");
}
LOGGER.debug("获取添加或修改前的属性值："+key+"=" + properties.getProperty(key));
properties.setProperty(key, value);
// 文件输出流
FileOutputStream fos = null;
try {
if(StringUtils.isBlank(path)){
fos = new FileOutputStream(Thread.currentThread().getContextClassLoader().getResource("").getPath() + "/" + fileName);
}else{
fos = new FileOutputStream(Thread.currentThread().getContextClassLoader().getResource("").getPath() + path + "/" + fileName);
}
// 将Properties集合保存到流中
properties.store(fos, "Copyright (c) Boxcode Studio");
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}finally {
try {
fos.close();// 关闭流
} catch (IOException e) {
e.printStackTrace();
}
}
LOGGER.debug("获取添加或修改后的属性值："+key+"=" + properties.getProperty(key));
return true;
}
}