如何实现两个Bean或两个List<T>的快速，相互转换

淡淡的烟草味﹌ 2021-11-22 14:01 942阅读 0赞

### 一、场景中，两个List《A》,List《B》,A 包含 B，或者A，B类中有相同的东西 ###

### 二、代码示例 ###

#### 2.1 Customer对象 ####

package tonels.mbdemo3.entity;
    
    import lombok.Data;
    import lombok.experimental.Accessors;
    
    import java.math.BigDecimal;
    
    @Data
    @Accessors(chain = true)
    public class Customers {
    
        private Integer customernumber;
    
        private String customername;
    
        private String contactlastname;
    
        private String contactfirstname;
    
        private String phone;
    
        private String addressline1;
    
        private String addressline2;
    
        private String city;
    
        private String state;
    
        private String postalcode;
    
        private String country;
    
        private Integer salesrepemployeenumber;
    
        private BigDecimal creditlimit;
    
    
    }

#### 2.2 CustomerVo对象 ####

package tonels.mbdemo3.vo;
    
    import lombok.Data;
    
    @Data
    public class CustoVo {
    
        private String customernumber;
    
        private String customername;
    
        private String contactlastname;
    
        private String contactfirstname;
    }

### 三、处理过程 ###

#### 3.1 ####

List<Customers> all = customersService.findAll2();
     List<CustoVo> vos= all.stream().map(e -> JSONUtil.toBean(JSONUtil.toJsonStr(e), CustoVo.class)).collect(Collectors.toList());

### 转换前 all ###

[{
    "customernumber": 131,
    "customername": "Land of Toys Inc.",
    "contactlastname": "Lee",
    "contactfirstname": "Kwai",
    "phone": null,
    "addressline1": null,
    "addressline2": null,
    "city": null,
    "state": null,
    "postalcode": null,
    "country": null,
    "salesrepemployeenumber": null,
    "creditlimit": null
    },
    {
    "customernumber": 151,
    "customername": "Muscle Machine Inc",
    "contactlastname": "Young",
    "contactfirstname": "Jeff",
    "phone": null,
    "addressline1": null,
    "addressline2": null,
    "city": null,
    "state": null,
    "postalcode": null,
    "country": null,
    "salesrepemployeenumber": null,
    "creditlimit": null
    },
    {
    "customernumber": 181,
    "customername": "Vitachrome Inc.",
    "contactlastname": "Frick",
    "contactfirstname": "Michael",
    "phone": null,
    "addressline1": null,
    "addressline2": null,
    "city": null,
    "state": null,
    "postalcode": null,
    "country": null,
    "salesrepemployeenumber": null,
    "creditlimit": null
    },
    {
    "customernumber": 424,
    "customername": "Classic Legends Inc.",
    "contactlastname": "Hernandez",
    "contactfirstname": "Maria",
    "phone": null,
    "addressline1": null,
    "addressline2": null,
    "city": null,
    "state": null,
    "postalcode": null,
    "country": null,
    "salesrepemployeenumber": null,
    "creditlimit": null
    },
    {
    "customernumber": 456,
    "customername": "Microscale Inc.",
    "contactlastname": "Choi",
    "contactfirstname": "Yu",
    "phone": null,
    "addressline1": null,
    "addressline2": null,
    "city": null,
    "state": null,
    "postalcode": null,
    "country": null,
    "salesrepemployeenumber": null,
    "creditlimit": null
    }]

#### 转换后,观察其中的区别 ####

[{
    "customernumber": "131",
    "customername": "Land of Toys Inc.",
    "contactlastname": "Lee",
    "contactfirstname": "Kwai"
    },
    {
    "customernumber": "151",
    "customername": "Muscle Machine Inc",
    "contactlastname": "Young",
    "contactfirstname": "Jeff"
    },
    {
    "customernumber": "181",
    "customername": "Vitachrome Inc.",
    "contactlastname": "Frick",
    "contactfirstname": "Michael"
    },
    {
    "customernumber": "424",
    "customername": "Classic Legends Inc.",
    "contactlastname": "Hernandez",
    "contactfirstname": "Maria"
    },
    {
    "customernumber": "456",
    "customername": "Microscale Inc.",
    "contactlastname": "Choi",
    "contactfirstname": "Yu"
    }]

### 四、关于两个Bean的相互转换，更简单些，这里贴上方法，自己有兴趣可以试试 ###

![在这里插入图片描述][20190724174612956.png]

### 五、Hutool包中的JsonUtil实现的对象的互转都是基于Json的 ###

[20190724174612956.png]: /images/20211122/a379211c675047ed94e4579d40e3a780.png