JAVA读写Properties文件
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Java代码 package com.geosun.conf; import java.io.BufferedInputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Enumeration; import java.util.Properties; /* * 从路径中的属性文件中读取单个属性或全部属性及设置属性 */ public class GetProperty { public static String readValue(String filePath, String key) { Properties props = new Properties(); try { InputStream ips = new BufferedInputStream(new FileInputStream(filePath)); props.load(ips); String value = props.getProperty(key); System.out.println(key + "=" + value); return value; } catch (FileNotFoundException e) { e.printStackTrace(); return null; } catch (IOException e) { e.printStackTrace(); return null; } } // 读取全部信息 public static void readProperties(String filePath) { Properties props = new Properties(); try { InputStream ips = new BufferedInputStream(new FileInputStream(filePath)); props.load(ips); Enumeration enum1 = props.propertyNames(); while (enum1.hasMoreElements()) { String key = (String) enum1.nextElement(); String value = props.getProperty(key); System.out.println(key + "=" + value); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void writeProperties(String filePath, String paraKey, String paraValue) { Properties props = new Properties(); try { OutputStream ops = new FileOutputStream(filePath); props.setProperty(paraKey, paraValue); props.store(ops, "set"); } catch (IOException e) { e.printStackTrace(); } } //用load的话 就会追加或者覆盖原有的key-value public static void writeConfig(String key, String value){ String path = System.getProperty("user.dir") + File.separator + "config" + File.separator + "config.properties"; Properties props = new Properties(); try { props.load(new FileInputStream(path));//用load的话 就会追加或者覆盖原有的key-value OutputStream ops = new FileOutputStream(path); props.setProperty(key, value); props.store(ops, "add-------"); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { GetProperty.readValue("D:\\eclipse3.3\\workspace\\Test\\src\\sys.properties", "username"); GetProperty.readProperties("D:\\eclipse3.3\\workspace\\Test\\src\\sys.properties"); GetProperty.writeProperties("D:\\eclipse3.3\\workspace\\Test\\src\\sys.properties", "age", "21"); } } |
