java – Servlet.init() for servlet [dispatcher] threw exception

java – Servlet.init() for servlet [dispatcher] threw exception

the root of problem is here:

Failed to introspect bean class
[com.apurv.onlineshopping.controller.PageController] for resource
metadata: could not find class that it depends on

DI container cant find the class defined in another .jar
to solve the problem lets go through the code:

you inject a DAO component:

@Controller
public class PageController {

    @Autowired
    private CategoryDAO categoryDao;

which can be found by in packges (not .jars) defined in web.xml:

<context:component-scan base-package=com.apurv.onlineshopping.controller/>
<context:component-scan base-package=com.apurv.shoppingbackend.daoImpl />

as I found your two modules disposited alone, so build system have no information where them can found dependency for onlineshopping until you instruact them by hand.

My solution is: to organize your two independend modules into parent-modules pom:

here id parent pom.xml:

<?xml version=1.0 encoding=UTF-8?>
<project ...

    <groupId>com.apurv</groupId>
    <artifactId>so</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>

    <modules>
        <module>shoppingbackend</module>
        <module>onlineshopping</module>
    </modules>

</project>

next put a ref to parent in your modules:
onlineshoppings pom.xml

<project ...
    <modelVersion>4.0.0</modelVersion>
    <!--unnecessary <groupId>com.apurv</groupId>-->
    <artifactId>onlineshopping</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>onlineshopping</name>
    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.apurv</groupId>
        <artifactId>so</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    ... tail of your code is unchanged ...

and shoppingbackends pom.xml

<project ...
    <modelVersion>4.0.0</modelVersion>
    <!--unnecessary  <groupId>com.apurv</groupId>-->
    <artifactId>shoppingbackend</artifactId>
    <packaging>jar</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>shoppingbackend</name>
    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.apurv</groupId>
        <artifactId>so</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

 ... tail of your code is unchanged ...

Next build root module:

mvn package

Rest of your code is unchanged, you can found full repo rehe: https://github.com/enginetag/so-apurv

java – Servlet.init() for servlet [dispatcher] threw exception