java MapUtils工具类 map与实体类之间的转换-蒲公英云

java MapUtils工具类 map与实体类之间的转换

怼烎@ 2022-04-25 02:36 372阅读 0赞

前言

实际开发中总是存在java与map想换转换的事情，而这种事公共方法可以写成一个工具类来处理。代码如下：

代码

MapUtils.java 工具类代码：

package com.kq.cloud.common.util;
import org.apache.commons.collections.map.LinkedMap;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.util.Map;
/**
 * @author iceter
 * @Date 2019/04/30
 */
public class MapUtils {
    public static Object transMap(Class type, Map map) throws Exception {
        Object obj = type.newInstance();//实例化类
        BeanInfo info = Introspector.getBeanInfo(type);//获取类中属性
        PropertyDescriptor[] propertyPermissions = info.getPropertyDescriptors();
        for (PropertyDescriptor pro : propertyPermissions) {
            String proName = pro.getName();
            if(map.containsKey(proName)){
                Object methodName = map.get(proName);
                Object[] args = {methodName};
                try {
                    pro.getWriteMethod().invoke(obj,args);
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }
        return obj;
    }
    public static void main(String[] args) throws Exception {
        Map map = new LinkedMap();
        map.put("age",11);
        map.put("id","33");
        map.put("sex","man");
        map.put("name","fei");
        map.put("addr","neyok");
        User user =  (User) MapUtils.transMap(User.class,map);
        System.out.println(user);
    }
}

实体类代码

user.java 实体类代码

package com.kq.cloud.common.util;
public class User {
    private String id;
    private String name;
    private String sex;
    private Integer age;
    private String addr;
    @Override
    public String toString() {
        return "User{" +
                "id='" + id + '\'' +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", age=" + age +
                ", addr='" + addr + '\'' +
                '}';
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getAddr() {
        return addr;
    }
    public void setAddr(String addr) {
        this.addr = addr;
    }
}