org.hibernate.MappingException: Could not determine type for: String, at table: Elec_SystemDDL, for

╰半夏微凉° 2021-10-06 13:42 176阅读 0赞

org.hibernate.MappingException: Could not determine type for: String, at table: Elec_SystemDDL, for columns: [org.hibernate.mapping.Column(ddlName)

--------------------

#### **这个错误找了，好一会，看提示应该就是配置文件的问题** ####

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    <hibernate-mapping>
        <class name="cn.itcast.elec.domain.ElecSystemDDl" table="Elec_SystemDDL">
            <id name="seqID" type="integer">
                <column name="seqID" not-null="true" />
                <generator class="increment"></generator>
            </id>
            <property name="keyWord" type="string">
                <column name="Keyword" />
            </property>
            <property name="ddlCode" type="integer">
                <column name="ddlCode"/>
            </property>
    
            <property name="ddlName" type="String">
                <column name="ddlName" />
            </property>
        </class>
    </hibernate-mapping>

#### **看着也好像没有问题啊！ ddlName 就是String 类型的呀！** ####

--------------------

#### **细看一会，才发现，配置文件中的property 中的 type 不能形成 String 而应该是 string 。【要全部小写】** ####

--------------------

#### **你如果把上面 ddlCode 的type = “integer” 改为 Integer 同样会报下面的错误。** ####

org.hibernate.MappingException: Could not determine type for: Integer, at table: Elec_SystemDDL, for columns: [org.hibernate.mapping.Column(ddlCode)]
        org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:291)