05-ognl基本语法

1 基本取值

@Test
    //1基础语法演示-基本取值
    //取出root中的属性值
    public void fun2() throws Exception{
        //1 准备OGNLcontext
        OgnlContext oc = new OgnlContext();
        //2 准备root
        User rootUser = new User();
        rootUser.setUsername("tom");
        rootUser.setAge(18);
        //3准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User());
        context.put("user2", new User());
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个Map作为context部分
        oc.setValues(context);
        //===============================
        //4书写ognl
        //获取root用user对象的属性值username & age
        String username = (String) Ognl.getValue("username", oc,oc.getRoot());
        Integer age = (Integer) Ognl.getValue("age", oc, oc.getRoot());
        System.out.println(username);
        System.out.println(age);
    }

@Test
    //1 ognl语法演示-基本取值
    //取出context中属性的值
    public void fun3() throws Exception{
        //1准备ognlcontext
        OgnlContext ognlContext = new OgnlContext();
        
        //2准备root
        User rootUser = new User("lucy", 24);
        
        //3准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("旺财",26));
        context.put("user2", new User("小强",21));
        
        //将rootUser作为root部分
        ognlContext.setRoot(rootUser);
        //将context这个Map作为context部分
        ognlContext.setValues(context);
        //==========================================
        //4书写Ognl
        //取出context中键为user1&user2对象的username和age属性
        String username1 = (String) Ognl.getValue("#user1.username", ognlContext, ognlContext.getRoot());
        Integer age1 = (Integer) Ognl.getValue("#user1.age", ognlContext, ognlContext.getRoot());
        String username2 = (String) Ognl.getValue("#user2.username", ognlContext, ognlContext.getRoot());
        Integer age2 = (Integer) Ognl.getValue("#user2.age", ognlContext, ognlContext.getRoot());
        System.out.println(username1+":"+age1);
        System.out.println(username2+":"+age2);
    }

2 赋值

//2 ognl基本语法-赋值
    @Test
    public void fun4() throws Exception{
        //准备ognlcontext
        OgnlContext oc = new OgnlContext();
        //准备root
        User rootUser = new User("小强", 15);
        //准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("张三", 19));
        context.put("user2", new User("李四", 20));
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个Map作为context部分
        oc.setValues(context);
        //======================================
        //书写ognl
        //将root中的user对象的username设置为tom
        String username = (String) Ognl.getValue("username='tom',username", oc, oc.getRoot());
        System.out.println(username);
        
        //将context中的user1对象的age修改为25；
        Integer age = (Integer) Ognl.getValue("#user1.age=25,#user1.age", oc, oc.getRoot());
        System.out.println(age);
        
        String name2 = (String) Ognl.getValue("#user2.username='jerry',#user2.age=36,#user2.username", oc, oc.getRoot());
        System.out.println(name2);
        Integer age2 = (Integer) Ognl.getValue("#user2.age", oc, oc.getRoot());
        System.out.println(age2);
    }

3 调用方法

//3 ognl基本语法-调用方法
    @Test
    public void fun5() throws Exception{
        //准备ognlcontext
        OgnlContext oc = new OgnlContext();
        
        //准备root
        User rootUser = new User("tom", 28);
        
        //准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("jenny", 19));
        context.put("user2", new User("lucy", 21));
        
        
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个map作为context部分
        oc.setValues(context);
        //=================================
        
        
        //书写ognl
        //调用root中user对象的setUsername方法
        String username = (String) Ognl.getValue("setUsername('leilei'),username", oc, oc.getRoot());
        System.out.println(username);
        //调用root中User对象的getName()方法
        Integer age = (Integer) Ognl.getValue("getAge()", oc, oc.getRoot());
        System.out.println(age);
        
        Ognl.getValue("#user1.setUsername('旺财'),#user1.setAge(27)", oc, oc.getRoot());
        String name1 = (String) Ognl.getValue("#user1.getUsername()", oc, oc.getRoot());        
        Integer age1 = (Integer) Ognl.getValue("#user1.getAge()", oc, oc.getRoot());
        System.out.println(name1+":"+age1);
    }

4 调用静态方法

//4 ognl基本语法--->调用静态方法
    @Test
    public void fun6() throws Exception{
        //准备ognlcontext
        OgnlContext oc = new OgnlContext();
        //准备root
        User rootUser = new User("tom", 18);
        //准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("lucy", 15));
        context.put("user2", new User("jerry", 15));
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个map作为context
        oc.setValues(context);
        
        //书写ognl
        String s = (String) Ognl.getValue("@www.test.utils.EchoUtils@echo('你好')", oc, oc.getRoot());
        System.out.println(s);
        
        //Double pi = (Double) Ognl.getValue("@java.lang.Math@PI", oc, oc.getRoot());
        Double pi = (Double) Ognl.getValue("@@PI", oc, oc.getRoot());
        System.out.println(pi);
    }

5 创建对象

//5 ognl基本语法--->创建对象（list,map）
    @Test
    public void fun7() throws Exception{
        //准备ognlcontext
        OgnlContext oc = new OgnlContext();
        //准备root
        User rootUser = new User("tom", 15);
        //准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("jeny", 56));
        context.put("user2", new User("lucy", 23));
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个map作为context
        oc.setValues(context);
        
        //书写ognl
        //创建list对象
        Integer size = (Integer)Ognl.getValue("{'tom','jerry','lucy','jack'}.size()", oc, oc.getRoot());
        String name = (String)Ognl.getValue("{'tom','jerry','lucy','jack'}[0]", oc, oc.getRoot());
        String name1 = (String)Ognl.getValue("{'tom','jerry','lucy','jack'}.get(1)", oc, oc.getRoot());
        //System.out.println(size);
        //System.out.println(name);
        //System.out.println(name1);
        
        //创建map对象
        Integer mapSize = (Integer)Ognl.getValue("#{'name':'tom','age':35}.size", oc, oc.getRoot());
        String mapName = (String)Ognl.getValue("#{'name':'tom','age':35}['name']", oc, oc.getRoot());
        Integer mapAge = (Integer)Ognl.getValue("#{'name':'tom','age':35}.get('age')", oc, oc.getRoot());
        System.out.println(mapSize);
        System.out.println(mapName);
        System.out.println(mapAge);
    }
    

6 使用字符串的已有方法

//6 ognl基本语法====>使用字符串的已有方法
    @Test
    public void fun8() throws Exception{
        //准备ognlcontext
        OgnlContext oc = new OgnlContext();
        //准备root
        User rootUser = new User("tom", 15);
        //准备context
        Map<String,User> context = new HashMap<String,User>();
        context.put("user1", new User("jeny", 56));
        context.put("user2", new User("lucy", 23));
        //将rootUser作为root部分
        oc.setRoot(rootUser);
        //将context这个map作为context
        oc.setValues(context);
        
        //书写ognl
        Integer sl = (Integer) Ognl.getValue("'we are from china'.length()", oc, oc.getRoot());
        String sr = (String) Ognl.getValue("'we are from china'.replace('we','you')", oc, oc.getRoot());
        Character sc = (Character) Ognl.getValue("'we are from china'.charAt(0)", oc, oc.getRoot());
        System.out.println(sl);
        System.out.println(sr);
        System.out.println(sc);
    }