java MapUtils工具类 map与实体类之间的转换

怼烎@ 2022-04-25 02:36 287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;
        }
    }

目前只写了map转换为实体类，实体类转换为map就自己比着葫芦画瓢吧。

文中代码下载地址：[https://download.csdn.net/download/u011561335/11153791][https_download.csdn.net_download_u011561335_11153791]

[https_download.csdn.net_download_u011561335_11153791]: https://download.csdn.net/download/u011561335/11153791