- java properties增删改查
- public static void main(String args[]) throws IOException {
- Properties prop = new Properties();
- OutputStream out = new FileOutputStream("D:\\workspace\\JavaStudy\\src\\test\\test.properties");
- /**
- * 新增逻辑:
- * 1.必须先读取文件原有内容
- * 2.增加新的记录以后,再一起保存
- */
- //1.先读取文件原有内容
- Map toSaveMap = new HashMap();
- Set keys = prop.keySet();
- for(Iterator itr = keys.iterator(); itr.hasNext();){
- String key = (String) itr.next();
- Object value = prop.get(key);
- toSaveMap.put(key, value);
- }
- //2.增加你需要增加的属性内容
- toSaveMap.put("name", "zhang san");
- toSaveMap.put("age", "25");
- prop.putAll(toSaveMap);
- prop.store(out, "==== after add ====");
- /**
- * 修改逻辑:重新设置对应Key的值即可,非常简单
- */
- prop.clear();
- toSaveMap.put("name", "li si");
- toSaveMap.put("age", "26");
- prop.putAll(toSaveMap);
- prop.store(out, "==== after modify ====");
- /**
- * 删除逻辑:找到对应的key,删除即可
- */
- prop.clear();
- toSaveMap.remove("name");
- prop.putAll(toSaveMap);
- prop.store(out, "==== after remove ===="));
- /**
- * 查询逻辑:
- */
- InputStream in = new FileInputStream("D:\\workspace\\JavaStudy\\src\\test\\test.properties");
- prop.load(in);
- System.out.println("name: " + prop.get("name"));
- System.out.println("age: " + prop.get("age"));
- }
来源: http://www.phpxs.com/code/1001604/