Java属性配置Properties

约定不等于承诺〃 2023-10-18 19:38 151阅读 0赞

简单的属性配置，比如一个配置文件test.properties内容:

password=123456
    id=1
    name=phil

读取配置：

import java.io.File;
    import java.io.FileInputStream;
    import java.io.PrintStream;
    import java.util.*;
    
    /**
     * 测试程序。
     */
    public class Main {
        public static void main(String[] args) {
            try {
                new Main().test();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        private void test() throws Exception {
            printer();
        }
    
        private void printer() throws Exception {
            Properties prop = new Properties();
            FileInputStream fis = new FileInputStream("test.properties");
            prop.load(fis);
            fis.close();
    
            System.out.println("==========");
    
            Set<Map.Entry<Object, Object>> sets = prop.entrySet();
            Iterator<Map.Entry<Object, Object>> iterator = sets.iterator();
            while (iterator.hasNext()) {
                Map.Entry<Object, Object> entry = iterator.next();
    
                Object key = entry.getKey();
                Object value = entry.getValue();
                System.out.println(key + "->" + value+"-"+prop.getProperty(key.toString()));
            }
        }
    
        /**
         * 增加配置。
         *
         * @param key
         * @param value
         */
        private void setProperty(String key, String value) throws Exception {
            Properties p = new Properties();
            p.setProperty("id", "2019");
            p.setProperty("password", "654321");
            PrintStream ps = new PrintStream(new File("test.properties"));
            p.list(ps);
        }
    }

输出：

==========
    password->123456-123456
    name->phil-phil
    id->1-1