Question

这是我的applicationContext.xml的样子：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:sec="http://www.springframework.org/schema/security"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.2.xsd">

..... .....

<bean id="customEditorConfigurer" class="org.springframework.beans.factory.config.CustomEditorConfigurer">
   <property name="customEditors">
        <map>
           <entry key="java.lang.String">
                <ref bean="stringTrimmerEditor"/>
            </entry>
        </map>
    </property>
 </bean>

我收到此错误：

org.springframework.beans.factory.BeanCreationException：错误创建名为'customEditorConfigurer'的bean ServletContext资源[/WEB-INF/spring-servlet.xml]：初始化豆失败;嵌套异常是 org.springframework.beans.TypeMismatchException：无法转换类型'java.util.LinkedHashMap'的属性值为必需的类型属性'customEditors'的'java.util.Map';嵌套异常是 java.lang.IllegalArgumentException：无法转换类型的值 [org.springframework.beans.propertyeditors.StringTrimmerEditor]来属性所需的类型[java.lang.Class] 'customEditors [java.lang.String]'：PropertyEditor [org.springframework.beans.propertyeditors.ClassEditor]返回不合适的类型值 [org.springframework.beans.propertyeditors.StringTrimmerEditor]

Answer 1

documentation for the setCustomEditors method of the CustomEditorConfigurer class声明如下（强调我的）：

指定要通过Map注册的自定义编辑器，使用所需类型的类名作为键，并将关联的PropertyEditor的类名称作为值

所以你传递的是类名，而不是bean本身，作为地图中每个条目的值。

尝试替换

<entry key="java.lang.String">
    <ref bean="stringTrimmerEditor"/>
</entry>

<击> 以

<击>

<entry key="java.lang.String"
       value="org.springframework.beans.propertyeditors.StringTrimmerEditor" />

<击>

与

<entry key="java.lang.String">
    <bean class="org.springframework.beans.propertyeditors.StringTrimmerEditor">
        <!-- change the value as necessary.  --> 
        <constructor-arg name="emptyAsNull" value="false" />  
    </bean>
</entry>

错误为org.springframework.beans.propertyeditors.StringTrimmerEditor实例化bean

1 个答案: