将前端传递来的键值对转换成对象相应的值

Posted 2021-12-02 梁云亮

功能说明

比如前端网页传递过来的数据是id=123&name=zhangsan&age=23
通过工具类，最终能够将键值对赋给User对象

user{id:123,name:zhangsan,age:23}

实体类

@Data
public class User {
    /**
     * 昵称
     */
    private String nickname;

    /**
     * 登录名
     */
    private String account;
    /**
     * 电话
     */
    private String tel;

}

工具类

public class SearchConditionUtil {
    /**
     * 调用obj的set方法将searchCondition的值设置到obj中
     *
     * @param obj
     * @param searchCondition 查询条件
     * @param <T>
     */
    public static <T> void initParam(T obj, SearchCondition searchCondition) {
        if (searchCondition != null) {
            String searchKey = searchCondition.getSearchKey();
            String searchValue = searchCondition.getSearchValue();
            if (searchKey != null && searchKey.length() > 0 && searchValue != null && searchValue.length() > 0) {
                try {
                    Method method = obj.getClass().getMethod("set" + StringUtil.firstLatterUpper(searchKey), String.class);
                    method.invoke(obj, searchValue);
                } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

SearchCondition是用来封装查询数据（key和value）的实体类，具体代码如下：

@Getter
@Setter
@ToString
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class SearchCondition {
    /**
     * 条件查询的key
     */
    private String searchKey;
    /**
     * 条件查询的value
     */
    private String searchValue;
}

测试代码

public static void main(String[] args) throws Exception {
    User user = new User();
    String searchKey = "tel";
    String searchValue = "432423";
    SearchCondition searchCondition = new SearchCondition(searchKey, searchValue);
    initParam(user, searchCondition);
    System.out.println(user);
}