1.配置SpringMVC-Servlet.xml
<!-- 注解扫描包，在这个包下的类都会启用注解 --> <context:component-scan base-package="com.tgb.web.controller.annotation" /> <!-- 开启注解 2种皆可--> <mvc:annotation-driven /> <!--<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> </bean> -->
2.Controller类UserController.java 应当在自定义包com.tgb.web.controller.annotation下
关键字： @Controller ，@RequestMapping（value="",method=）,不指定method的话，可以支持post和get
@Controller
public class UserController {
@RequestMapping(value = "/user/addUser",method=RequestMethod.POST)
public ModelAndView addUser() {
String result = "---addUser test---";
return new ModelAndView("/annotationTest","result",result);
}
@RequestMapping(value = "/user/delUser")
public ModelAndView delUser() {
String result = "---delUser test---";
return new ModelAndView("/annotationTest", "result", result);
}
@RequestMapping(value = "/user/toUser")
public ModelAndView toUser() {
return new ModelAndView("/annotationTest");
}
}
优化：可以把根目录写到类名上面，方法的@RequestMapping中的value=可以不写。另外，除了返回ModelAndView类型外，还可以返回String类型，即是返回要反问的请求：
@Controller
@@RequestMapping("/user"）
public class UserController {
@RequestMapping("/addUser")
public String addUser(HttpServletRequest request,
HttpServletResponse response) {
String result = "---addUser test---";
request.setAtrribute("result",result); //传递参数
return String "/annotationTest";
}
@RequestMapping("/delUser")
public ModelAndView delUser(HttpServletRequest request,
HttpServletResponse response) {
String result = "---delUser test---";
request.setAtrribute("result",result);
return String "/annotationTest";
}
@RequestMapping("/toUser")
public String toUser(){
return String "/annotationTest";
}
}
3.请求页面 annotationTest.jsp
<body>
<form action="<%=request.getContextPath()%>/user/toUser" method="post">
<div>
${result}
</div>
<input type="submit" value="POST请求">
</form>
</body>