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You are getting an error because of, most probably, a bean configuration problem. Look at below configuration.<br />
<br />
&lt;bean id=“service&quot; class=“ServiceImpl&quot;&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;property name=&quot;instance&quot; ref=&quot;testid&quot;/&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &lt;/bean&gt;<br />
<br />
Looking at above, you are trying to set a property named instance of ServiceImpl class. Are you sure your ServiceImpl has instance property and has setInstance() method ? I dont see a configuration for Employee class. Please check and correct the configuration. <br />
<br />
Let us know if issue still persist.
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please post your serviceimpl class.<br />
<br />
You have posted the wrong code
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Below is the error that it is not able to find setter for private Data instance. Can this member variable have getters and setters?<br />
<br />
public class Employee {<br />
&nbsp;<br />
&nbsp; &nbsp; private int empId;<br />
&nbsp; &nbsp; private String name;<br />
&nbsp; &nbsp; private Data instance; —— class instance<br />
<br />
<br />
&nbsp; &nbsp; &lt;bean id=&quot;testid&quot; class=“com.UpdateRecords&quot;&gt;<wbr />&lt;/bean&gt;<br />
&nbsp; &nbsp; &lt;util:list id=“testList&quot; value-type=&quot;ServiceBase&quot;&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &lt;bean id=“service&quot; class=“ServiceImpl&quot;&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;property name=&quot;instance&quot; ref=&quot;testid&quot;/&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &lt;/bean&gt;<br />
&nbsp; &nbsp; &lt;/util:list&gt;<br />
<br />
<br />
Caused by: org.springframework.beans.<wbr />NotWritabl<wbr />ePropertyE<wbr />xception: Invalid property 'instance' of bean class <br />
<br />
&nbsp;Bean property 'instance' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
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Below is the error that it is not able to find setter for private Data instance. Can this member variable have getters and setters?

public class Employee {
 
    private int empId;
    private String name;
    private Data instance; —— class instance


    <bean id="testid" class=“com.UpdateRecords"></bean>
    <util:list id=“testList" value-type="ServiceBase">
        <bean id=“service" class=“ServiceImpl">
            <property name="instance" ref="testid"/>
        </bean>
    </util:list>


Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'instance' of bean class 

 Bean property 'instance' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

Spring framework: how to use class instance in spring bean as property?

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Java

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