Property工具类，Properties文件工具类，PropertiesUtils工具类
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蕃薯耀 8月9日 11:31:12 星期二
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package mon.utils;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.HashMap;import java.util.Map;import java.util.Properties;import java.util.Set;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class PropertiesUtils {private static Logger log = LoggerFactory.getLogger(PropertiesUtils.class);/*** 根据文件名获取Properties对象* @param fileName* @return*/public static Properties read(String fileName){InputStream in = null;try{Properties prop = new Properties();//InputStream in = Object.class.getResourceAsStream("/"+fileName);in = PropertiesUtils.class.getClassLoader().getResourceAsStream(fileName);prop.load(in);return prop;}catch(Exception e){e.printStackTrace();}finally{try {if(in != null){in.close();}} catch (IOException e) {e.printStackTrace();}}return null;}/*** 根据文件名和键名获取值* @param fileName* @param key* @return*/public static String readKeyValue(String fileName, String key){Properties prop = read(fileName);if(prop != null){return prop.getProperty(key);}return null;}/*** 根据键名获取值* @param prop* @param key* @return*/public static String readKeyValue(Properties prop, String key){if(prop != null){return prop.getProperty(key);}return null;}/*** 写入* @param fileName* @param key* @param value*/public static void writeValueByKey(String fileName, String key, String value){Map<String, String> properties = new HashMap<String, String>();properties.put(key, value);writeValues(fileName, properties);}/*** 写入* @param fileName* @param properties*/public static void writeValues(String fileName, Map<String, String> properties){InputStream in = null;OutputStream out = null;try {in = PropertiesUtils.class.getClassLoader().getResourceAsStream(fileName);Properties prop = new Properties();prop.load(in);String path = PropertiesUtils.class.getResource("/"+fileName).getPath();out = new FileOutputStream(path);if(properties != null){Set<String> set = properties.keySet();for (String string : set) {prop.setProperty(string, properties.get(string));log.info("更新"+fileName+"的键（"+string+"）值为："+properties.get(string));}}prop.store(out, "update properties");} catch (Exception e) {e.printStackTrace();} finally{try {if(in != null){in.close();}if(out != null){out.flush();out.close();}} catch (Exception e2) {e2.printStackTrace();}}}public static void main(String[] args) throws Exception {//System.out.println("read="+read("config.properties"));//System.out.println("readKeyValue="+readKeyValue("config.properties","superAdmin"));//writeValueByKey(CC.WEIXI_PROPERTIES, "access_token", "ddd");Map<String, String> properties = new HashMap<String, String>();properties.put("access_token", "ddd2");properties.put("access_token1", "ee2");properties.put("bbbb", "bbbb");}}
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蕃薯耀 8月9日 11:31:12 星期二
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