在编码过程中，时常遇到类与类之间进行转换，本人以前用的值笨办法，一个属性一个属性的取值赋值，效率低不说，时常出现错误。在几经折腾下，本人找到了以下的方法，仅供参考。

基础要求：

1、要进行转换的类必须继承Covert类

2、目标类中的字段包含源类中的字段

讯享网

代码实现：

1、基础的转换工具类：

public class BeanConverter { private static final ModelMapper modelMapper; static { modelMapper = new ModelMapper(); Jsr310ModuleConfig config = Jsr310ModuleConfig.builder() .dateTimePattern("yyyy-MM-dd HH:mm:ss") // default is yyyy-MM-dd HH:mm:ss .datePattern("yyyy-MM-dd") // default is yyyy-MM-dd .zoneId(ZoneOffset.UTC) // default is ZoneId.systemDefault() .build(); modelMapper.registerModule(new Jsr310Module(config)).registerModule(new Jdk8Module()); modelMapper.getConfiguration().setFullTypeMatchingRequired(true); modelMapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT); } / * 获取 modelMapper * * @return */ public static ModelMapper getModelMapper() { return modelMapper; } / * Bean转换为Map * * @param bean * @param <T> * @return */ public static <T> Map<String, Object> beanToMap(T bean) { Map<String, Object> map = Collections.emptyMap(); if (null != bean) { BeanMap beanMap = BeanMap.create(bean); map = new HashMap<>(beanMap.keySet().size()); for (Object key : beanMap.keySet()) { map.put(String.valueOf(key), beanMap.get(key)); } } return map; } / * List<E>转换为List<Map<String, Object>> * * @param objList * @param <T> * @return */ public static <T> List<Map<String, Object>> beansToMap(List<T> objList) { List<Map<String, Object>> list = Collections.emptyList(); if (CollectionUtils.isNotEmpty(objList)) { list = new ArrayList<>(objList.size()); Map<String, Object> map; T bean; for (T anObjList : objList) { bean = anObjList; map = beanToMap(bean); list.add(map); } } return list; } / * map转为bean * * @param <T> the type parameter * @param mapList the map list * @param beanClass the bean class * @return t list */ public static <T> List<T> mapToBean(List<Map<String, Object>> mapList, Class<T> beanClass) { List<T> list = Collections.emptyList(); if (CollectionUtils.isNotEmpty(mapList)) { list = new ArrayList<>(mapList.size()); Map<String, Object> map; T bean; for (Map<String, Object> map1 : mapList) { map = map1; bean = mapToBean(map, beanClass); list.add(bean); } } return list; } / * map转为bean * * @param map the map * @param beanClass the bean class * @return t */ public static <T> T mapToBean(Map<String, Object> map, Class<T> beanClass) { T entity = ClassUtils.newInstance(beanClass); BeanMap beanMap = BeanMap.create(entity); beanMap.putAll(map); return entity; } / * 列表转换 * * @param clazz the clazz * @param list the list */ public static <T> List<T> convert(Class<T> clazz, List<?> list) { return CollectionUtils.isEmpty(list) ? Collections.emptyList() : list.stream().map(e -> convert(clazz, e)).collect(Collectors.toList()); } / * 单个对象转换 * * @param targetClass 目标对象 * @param source 源对象 * @return 转换后的目标对象 */ public static <T> T convert(Class<T> targetClass, Object source) { return getModelMapper().map(source, targetClass); } }

2、Covert类

讯享网public class Covert implements Serializable { / * 获取自动转换后的JavaBean对象 * * @param clazz * @param <T> * @return */ public <T> T convert(Class<T> clazz) { return BeanConverter.convert(clazz, this); } }

示例：

public class CS { public static void main(String[] args) { SysVo sysVo = new SysVo(); sysVo.setAccount("11"); sysVo.setPassword("11"); SysUser user = sysVo.convert(SysUser.class); System.out.println(user); } @Data static class SysVo extends Covert { @TableField("ACCOUNT") private String account; @TableField("PASSWORD") private String password; } }