ognl对象导航图语言

功能：解决复杂map对象下数据获取处理的问题。

依赖：

用旧版的

话不多说 直接上代码，对于不同类型的值的获取：

public class OgnlUtils {

/**
 * @return java.lang.Boolean
 * @throws
 * @author zhengwentao
 * @Description 获取String类型
 * @date 2019/11/8 10:31
 * @params [ognl, root]
 */
public static String getString(String ognl, Map<String, Object> root) {
    try {
        return Ognl.getValue(ognl, root).toString();
    } catch (OgnlException e) {
        throw new RuntimeException(e);
    }
}

/**
 * @return java.lang.Boolean
 * @throws
 * @author zhengwentao
 * @Description 获取数字类型
 * @date 2019/11/8 10:31
 * @params [ognl, root]
 */
public static Number getNumber(String ognl, Map<String, Object> root) {
    Number result = null;
    try {
        Object value = Ognl.getValue(ognl, root);
        if (value != null) {
            if (value instanceof Number) {
                result = (Number) value;
            } else if (value instanceof String) {
                result = new BigDecimal((String) value);
            }
        }
        return result;

    } catch (OgnlException e) {
        throw new RuntimeException(e);
    }
}

/**
 * @return java.lang.Boolean
 * @throws
 * @author zhengwentao
 * @Description 获取Boolean类型
 * @date 2019/11/8 10:31
 * @params [ognl, root]
 */

public static Boolean getBoolean(String ognl, Map<String, Object> root) {

    Boolean result = null;
    try {
        Object value = Ognl.getValue(ognl, root);
        if (value != null) {
            if (value instanceof Boolean) {
                result = (Boolean) value;
            } else if (value instanceof String) {
                result = ((String) value).equalsIgnoreCase("true") ? true : false;
            } else if (value instanceof Number) {
                result = ((Number) value).intValue() == 1 ? true : false;
            }
        }
        return result;
    } catch (OgnlException e) {
        throw new RuntimeException(e);
    }
}

/**
 * @return java.lang.Boolean
 * @throws
 * @author zhengwentao
 * @Description 获取List<Map   <   String   ,   Object>>类型
 * @date 2019/11/8 10:31
 * @params [ognl, root]
 */
public static List<Map<String, Object>> getListMap(String ognl, Map<String, Object> root) {
    List<Map<String, Object>> result = null;
    try {
        result = (List<Map<String, Object>>) Ognl.getValue(ognl, root);
        if (result == null || result.size() == 0) {
            result = new ArrayList<>();
        }

    } catch (OgnlException e) {
        throw new RuntimeException(e);
    }
    return result;
}

/**
 * @return java.lang.Boolean
 * @throws
 * @author zhengwentao
 * @Description 获取List<String>类型
 * @date 2019/11/8 10:31
 * @params [ognl, root]
 */

public static List<String> getListString(String ognl, Map<String, Object> root) {
    List<String> result = null;
    try {
        result = (List<String>) Ognl.getValue(ognl, root);
        if (result == null || result.size() == 0) {
            result = new ArrayList<>();
        }
    } catch (OgnlException e) {
        throw new RuntimeException(e);
    }
    return result;
}

}

来源：CSDN

作者：weixin_44066928

链接：https://blog.csdn.net/weixin_44066928/article/details/103472187