1、访问属性文件
PropertiesConfiguration config1 = new PropertiesConfiguration("config.properties"); System.out.println(config1.getString("ip")); System.out.println(config1.getInt("port")); System.out.println(config1.getStringArray("keys")); //字符串数组,默认逗号分隔 System.out.println(config1.getList("keys")); //List,默认逗号分隔 config1.setProperty("port", "8088"); //修改属性值 config1.save(); //保存文件 System.out.println(config1.getInt("port"));
属性文件内容如下:
ip=127.0.0.1 port=8080 keys=k1,k2,k3,k4,k5,中文
2、访问xml文件
XMLConfiguration config2 = new XMLConfiguration("config.xml"); config2.setExpressionEngine(new XPathExpressionEngine()); //使用XPath表达式语言 //自动重新加载 FileChangedReloadingStrategy strategy = new FileChangedReloadingStrategy(); strategy.setRefreshDelay(5000); //每隔5000毫秒检查配置文件是否有修改,有则自动重新加载 config2.setReloadingStrategy(strategy); System.out.println(config2.getString("ip")); System.out.println(config2.getString("address/city")); System.out.println(config2.getString("databases/database[name='dev']/url"));
xml文件内容如下:
<?xml version="1.0" encoding="UTF-8"?> <configs> <ip>192.168.245.222</ip> <port>8080</port> <address> <province>GuangDong</province> <city>LuoDing</city> </address> <databases> <database> <name>dev</name> <url>127.0.0.1</url> <port>1521</port> <login>admin</login> <password>pass</password> </database> <database> <name>product</name> <url>192.168.124.11</url> <port>1521</port> <login>admin</login> <password>123456</password> </database> </databases> </configs>
3、访问环境变量
EnvironmentConfiguration config3 = new EnvironmentConfiguration(); for(Iterator it=config3.getKeys(); it.hasNext(); ){ String key = (String)it.next(); System.out.println(key + "=" + config3.getString(key)); }
4、访问系统变量
SystemConfiguration config4 = new SystemConfiguration(); for(Iterator it=config4.getKeys(); it.hasNext(); ){ String key = (String)it.next(); System.out.println(key + "=" + config4.getString(key)); }
5、组合各种配置
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CompositeConfiguration config5 = new CompositeConfiguration(); config5.addConfiguration(new EnvironmentConfiguration()); config5.addConfiguration(new SystemConfiguration()); config5.addConfiguration(new XMLConfiguration("config.xml")); config5.addConfiguration(new PropertiesConfiguration("config.properties")); System.out.println(config5.getString("JAVA_HOME")); System.out.println(config5.getString("user.home")); System.out.println(config5.getString("address.province")); System.out.println(config5.getList("keys"));