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接上文- Java的Properties配置文件用法

代碼示例

package configuration; import Java.io.FileInputStream; import Java.io.FileNotFoundException; import Java.io.FileOutputStream; import Java.io.IOException; import Java.util.Properties; /** *//** * 讀取properties文件 * @author Qutr * */ public class Configuration ...{ private Properties propertie; private FileInputStream inputFile; private FileOutputStream outputFile; /** *//** * 初始化Configuration類 */ public Configuration() ...{ propertie = new Properties(); } /** *//** * 初始化Configuration類 * @param filePath 要讀取的配置文件的路徑+名稱 */ public Configuration(String filePath) ...{ propertie = new Properties(); try ...{ inputFile = new FileInputStream(filePath); propertie.load(inputFile); inputFile.close(); } catch (FileNotFoundException ex) ...{ System.out.println("讀取屬性文件--->失?。? 原因：文件路徑錯(cuò)誤或者文件不存在"); ex.printStackTrace(); } catch (IOException ex) ...{ System.out.println("裝載文件--->失敗!"); ex.printStackTrace(); } }//end ReadConfigInfo(...) /** *//** * 重載函數(shù)，得到key的值 * @param key 取得其值的鍵 * @return key的值 */ public String getValue(String key) ...{ if(propertie.containsKey(key))...{ String value = propertie.getProperty(key);//得到某一屬性的值 return value; } else return ""; }//end getValue(...) /** *//** * 重載函數(shù)，得到key的值 * @param fileName properties文件的路徑+文件名 * @param key 取得其值的鍵 * @return key的值 */ public String getValue(String fileName, String key) ...{ try ...{ String value = ""; inputFile = new FileInputStream(fileName); propertie.load(inputFile); inputFile.close(); if(propertie.containsKey(key))...{ value = propertie.getProperty(key); return value; }else return value; } catch (FileNotFoundException e) ...{ e.printStackTrace(); return ""; } catch (IOException e) ...{ e.printStackTrace(); return ""; } catch (Exception ex) ...{ ex.printStackTrace(); return ""; } }//end getValue(...) /** *//** * 清除properties文件中所有的key和其值 */ public void clear() ...{ propertie.clear(); }//end clear(); /** *//** * 改變或添加一個(gè)key的值，當(dāng)key存在于properties文件中時(shí)該key的值被value所代替， * 當(dāng)key不存在時(shí)，該key的值是value * @param key 要存入的鍵 * @param value 要存入的值 */ public void setValue(String key, String value) ...{ propertie.setProperty(key, value); }//end setValue(...) /** *//** * 將更改后的文件數(shù)據(jù)存入指定的文件中，該文件可以事先不存在。 * @param fileName 文件路徑+文件名稱 * @param description 對(duì)該文件的描述 */ public void saveFile(String fileName, String description) ...{ try ...{ outputFile = new FileOutputStream(fileName); propertie.store(outputFile, description); outputFile.close(); } catch (FileNotFoundException e) ...{ e.printStackTrace(); } catch (IOException ioe)...{ ioe.printStackTrace(); } }//end saveFile(...) public static void main(String[] args) ...{ Configuration rc = new Configuration("./config/test.properties");//相對(duì)路徑 String ip = rc.getValue("ipp");//以下讀取properties文件的值 String host = rc.getValue("host"); String tab = rc.getValue("tab"); System.out.println("ip = " + ip + "ip-test leng = " + "ip-test".length());//以下輸出properties讀出的值 System.out.println("ip's length = " + ip.length()); System.out.println("host = " + host); System.out.println("tab = " + tab); Configuration cf = new Configuration(); String ipp = cf.getValue("./config/test.properties", "ip"); System.out.println("ipp = " + ipp); // cf.clear(); cf.setValue("min", "999"); cf.setValue("max", "1000"); cf.saveFile("./config/save.perperties", "test"); // Configuration saveCf = new Configuration(); // saveCf.setValue("min", "10"); // saveCf.setValue("max", "1000"); // saveCf.saveFile("./config/save.perperties"); }//end main() }//end class ReadConfigInfo

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Java的Properties配置文件用法【續(xù)】