Map与JavaBean相互转换工具类

• Map转JavaBean

• @param clazz

• @param map

• @param

• @return

*/

public static T map2Bean(final Class clazz, final Map<String, ? extends Object> map) {

if (map == null) {

return null;

}

T res = null;

try {

res = clazz.getDeclaredConstructor().newInstance();

//获取到所有属性，不包括继承的属性

Field[] fields = clazz.getDeclaredFields();

for (Field field : fields) {

//获取字段的修饰符

int mod = field.getModifiers();

if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {

continue;

}

//设置对象的访问权限

field.setAccessible(true);

//根据属性名称去map 《一线大厂Java面试题解析+后端开发学习笔记+最新架构讲解视频+实战项目源码讲义》无偿开源 威信搜索公众号【编程进阶路】 获取value

if(map.containsKey(field.getName())) {

//给对象赋值

field.set(res, map.get(field.getName()));

}

}

} catch (Exception e) {

e.printStackTrace();

}

return res;

}

public static void main(String[] args) throws Exception {

HashMap<String, Object> map = new HashMap<>();

map.put(“id”, 1001);

map.put(“username”, “zhangsan”);

map.put(“password”, “123456”);

map.put(“nickname”, “张三”);

map.put(“email”, “369950806@qq.com”);

map.put(“gender”, true);

map.put(“birth”, LocalDate.now());

map.put(“avatar”, “/aa/bb/ab.jpg”);

map.put(“role”, “VIP”);

map.put(“status”, (byte) 1);

map.put(“salt”, “ldfkasjghweoiq324”);

map.put(“createTime”, LocalDateTime.now());

map.put(“updateTime”, LocalDateTime.now());

User user = map2Bean(User.class, map);

System.out.println(user);

Map<String, Object> res = bean2Map(user);

System.out.println(map);

}

}

User类的代码：

public class User {

private Integer id;

private String username;

private String password;

private String nickname;