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copied!<p>Advised by @JB Nizet, I removed </p> <ol> <li><code>ControllerClassNameHandlerMapping</code></li> <li><code>urlMapping</code></li> <li><code>indexController</code></li> </ol> <p>from the <code>dispatcher-servlet.xml</code> file, and simply replaced it by <code><mvc:annotation-driven /></code>. </p> <p>What's more, <code><context:component-scan base-package="com.mycompany.myapp.controllers"></context:component-scan></code> was add to the <code>dispatcher-servlet.xml</code> file.</p> <p>Also, you need to specify <code>xsi:schemaLocation</code>, so add </p> <p>"<code>http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd</code>"</p> <p>to the <code>xsi:schemaLocation</code> attribute. </p> <p>And after all of these, I edited <code>index.jsp</code> to : (make student as student.htm) </p> <pre><code> <form method="GET" action="student.htm"> <input type="submit" value="submit"> </form> </code></pre> <p>And simply wrote those in my StudentController.java:</p> <pre><code>@RequestMapping(value="/index.htm", method=RequestMethod.GET) public String index(){ return "index"; } @RequestMapping(value = "/student.htm",method = RequestMethod.GET) public ModelAndView student(){ return new ModelAndView("student", "command", new Student()); } </code></pre> <p>After those, the problem was fixed.<br> Maybe I should consider useing Eclipse instead of NetBean to build Spring.</p>

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