Map与JavaBean相互转换的工具类

Map与JavaBean相互转换的工具类

下面就来分享工具类的内容：

使用范围：javaBean类对象的属性不能是数组、List、Set、Map

public chttp://lass MapBeanUtil {

/**

* JavaBean转Map

* @param obj

* @return

*/

public static Map bean2Map(Object obj) {

Map map = new LinkedHashMap<>();

Class> clazz = obj.getClass();

for (Field field : clazz.getDeclaredFields()) {

field.setAccessible(true);

String fieldName = field.getName();

Object value = null;

try {

value = field.get(obj);

} catch (IllegalAccessException e) {

e.printStackTrace();

}

if (value == null){

value = "";

}

map.put(fieldName, value);

}

return map;

}

/**

* Map转JavaBean

* @param clazz

* @param map

* @param

* @return

*/

public static T map2Bean(final Class clazz, final Map 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 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 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;

private String email;

private Boolean gender;

private LocalDate birth;

private String avatar;

private String role;

private Byte status;

private String salt;

private LocalDateTime createTime;

private LocalDateTime updateTime;

}

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