'mediaTypes' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
这是 怎么回事 程序如下

        <property name="mediaTypes">
            <map>
                <entry key="json" value="application/json" />
                <entry key="xml" value="application/xml" />
                <entry key="html" value="text/html" />
            </map>
        </property>