让代码更简单——自定义toBean实现

经过历时三天的鏖战，终于将阶段性项目——新闻发布系统做完了。在编码过程中，发现了很多冗余代码，统一流程，却需要不断重复编码——将用户输入实例化为对象的过程。

例：

Person.set("id", 1);

Person.set("name", "hu");

Person.set("birthday", new Date());

 

基于此我将该过程中间过程抽离出来，采用反射机制，遍历所有属性名获取对应的值，并将其放进实例化对象，达到封装不变部分的目的。

 

话不多说直接上代码：

Person.java

package com.blk.entity;

import java.util.Date;

public class Person {
    private int pid;
    private String name;
    private Date birthday;
    
    public Person() {
        super();
    }

    public int getPid() {
        return pid;
    }

    public void setPid(int pid) {
        this.pid = pid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "Person [birthday=" + birthday + ", name=" + name + ", pid="
                + pid + "]";
    }
    
    
}

ToBean.java

package com.blk.demo;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import com.blk.dao.ToBean;
import com.blk.entity.Person;

public class Test {
    public static void main(String[] args) throws InstantiationException, IllegalAccessException {
        // 创建map对象,并进行数据
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("pid", 1);
        map.put("name", "hu");
        map.put("birthday", new Date());
        
        // 将map对象转化为实体类对象
        Person p = (Person)ToBean.toBean(map, Person.class);
        System.out.println(p.toString());
    }
}

测试代码：Test.java

package com.blk.demo;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import com.blk.dao.ToBean;
import com.blk.entity.Person;

public class Test {
    public static void main(String[] args) throws InstantiationException, IllegalAccessException {
        // 创建map对象,并进行数据
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("pid", 1);
        map.put("name", "hu");
        map.put("birthday", new Date());
        
        // 将map对象转化为实体类对象
        Person p = (Person)ToBean.toBean(map, Person.class);
        System.out.println(p.toString());
    }
}