Implementing a Simple Framework for Managing Object Information Using Reflection

Implement a managed object using the reflection information of simple framework

看实现的效果：

And then we run the code,It can according to our configuration file statement instances of classes and properties to create the corresponding

Change the configuration file information：

对应的结果：

实现步骤：

首先通过Class类的**getResourceAsStream()**Methods to obtain a file input stream

Properties properties = new Properties();
InputStream resourceAsStream = MySpring.class.getResourceAsStream(PROPRETIES_PATH);

首先通过PropertiesThe information in the class to load the file——包含类的全限定名、属性值

properties.load(resourceAsStream);
String className = properties.getProperty("className");
Set<Object> keySet = properties.keySet();

Use reflection to load the file specified class,With instance

Class<?> loadClass = Class.forName(className);
Object o = loadClass.newInstance();

By reflecting access to all the properties in the class,并进行赋值

 Field[] fields = loadClass.getDeclaredFields();
        Arrays.stream(fields).filter(field -> keySet.contains(field.getName())).forEach(field -> {
    
            field.setAccessible(true);
            try {
    
                field.set(o, properties.getProperty(field.getName()));
            } catch (IllegalAccessException e) {
    
                throw new RuntimeException(e);
            }
        });

代码整合

我的Person类

package com.zky.pojo;

/** * @authoer:zky * @createDate:2022/7/30 * @description: */
public class Person {
    

    private String name;
    private String age;
    private String address;

    @Override
    public String toString() {
    
        return "Person{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

我的School类

package com.zky.pojo;

/** * @authoer:zky * @createDate:2022/7/30 * @description: */
public class School {
    

    private String name;

    private String level;

    @Override
    public String toString() {
    
        return "School{" +
                "name='" + name + '\'' +
                ", level='" + level + '\'' +
                '}';
    }
}

实现类

package com.zky.myframe;

import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.*;
import java.util.function.Consumer;
import java.util.function.Predicate;

/** * @authoer:zky * @createDate:2022/7/30 * @description: */
public class MySpring {
    

    public static final String PROPRETIES_PATH = "application.propreties";


    public static void main(String[] args) throws Exception {
    

        Object o = beanFactory();
        System.out.println(o);

    }

    public static Object beanFactory() throws Exception {
    

        //读取配置文件的信息
        Properties properties = new Properties();
        InputStream resourceAsStream = MySpring.class.getResourceAsStream(PROPRETIES_PATH);
        properties.load(resourceAsStream);
        String className = properties.getProperty("className");
        //TODO Modified to automatically retrieve attributes information
        Set<Object> keySet = properties.keySet();
        //Using the reflection to load the corresponding class
        Class<?> loadClass = Class.forName(className);
        Object o = loadClass.newInstance();
        Field[] fields = loadClass.getDeclaredFields();
        Arrays.stream(fields).filter(field -> keySet.contains(field.getName())).forEach(field -> {
    
            field.setAccessible(true);
            try {
    
                field.set(o, properties.getProperty(field.getName()));
            } catch (IllegalAccessException e) {
    
                throw new RuntimeException(e);
            }
        });

        return o;

    }

}

待优化：

Currently attribute support onlyString类型的属性,Other properties such as I have time to write~ 感觉不是很好弄.
Now can only manage a object,Multiple objects to be true