实现两个实体类之间的转换

传统
User

private String name;
private String password;
...

UserObject

private String name;
private String password;
...

userObject.setName(user.getName);
...

就很累, 如果字段有三四十个, 那么就是一个很不愿意做的工作了

那么对应的方法就产生了

<dependency>
    <groupId>net.sf.dozer</groupId>
    <artifactId>dozer</artifactId>
    <version>5.5.1</version>
</dependency>

import org.dozer.Mapper;

public static <T>T commonBeanCopy(Object object, Class<T> clazz) {
        // Mapper mapper = (Mapper) PlatformUtils.getBean("dozerBeanMapper");
        // 获取到你自己对应的mapper的注解bean部分.
        if (null == object) {
            return null;
        }
        if (null == clazz) {
            return null;
        }
        if (null != mapper) {
            return mapper.map(object, clazz);
        }
        return null;
    }

map 的源码, 加油,还看不懂

public <T> T map(Object source, Class<T> destinationClass) throws MappingException {
        return this.getMappingProcessor().map(source, destinationClass);
    }

protected Mapper getMappingProcessor() {
        this.initMappings();
        Mapper processor = new MappingProcessor(this.customMappings, this.globalConfiguration, this.cacheManager, this.statsMgr, this.customConverters, this.eventManager, this.getCustomFieldMapper(), this.customConvertersWithId);
        if (this.statsMgr.isStatisticsEnabled()) {
            processor = (Mapper)Proxy.newProxyInstance(processor.getClass().getClassLoader(), processor.getClass().getInterfaces(), new StatisticsInterceptor(processor, this.statsMgr));
        }

        return (Mapper)processor;
    }

就实现了两个对象之间的属性的复制, 后一个对象才是你真正的VO对象,往前端进行数据传输的对象, 数据库的全部字段是不能随便暴露出去的

可以去看看这个
参考文档 = https://www.cnblogs.com/guilf/p/9329176.html