Spring MVC Annotated Controller

时间:2011-04-12 12:11:17

标签: java spring spring-mvc

我有一个控制器,它有一些动作,可以通过点击页面上的各个按钮来触发。我想有一个默认操作,但我不确定如何注释该方法。这是一个例子:

@Controller
@RequestMapping("/view.jsp")
public class ExampleController {

    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView displayResults() {
        ModelAndView mav = new ModelAndView("view");
        mav.addObject("queryResults", methodToQueryDBForListing());
        return mav;
    }

    @RequestMapping(method = RequestMethod.POST, params="submit=Action 1")
    public ModelAndView action1(@RequestParam("selectedItemKey") String key) {
        ModelAndView mav = new ModelAndView("action1");
        //Business logic
        return mav;
    }

    @RequestMapping(method = RequestMethod.POST, params="submit=Action 2")
    public ModelAndView action2(@RequestParam("selectedItemKey") String key) {
        ModelAndView mav = new ModelAndView("action2");
        //Business logic
        return mav;
    }

    //A few more methods which basically do what action1 and action2 do
}

如何在没有选择任何键的情况下按下任何提交按钮来注释将作用于POST的方法?

我试过了:

@RequestMethod(method = RequestMethod.POST, params="!selectedItemKey")
@RequestMethod(method = RequestMethod.POST)

如果我必须在接受RequestParams的每个方法上设置required = false,然后有条件地检查是否有人进来,我真的很讨厌...有没有办法注释这个是否正常工作?

3 个答案:

答案 0 :(得分:3)

我会把它变成路径变量而不是参数,并且会摆脱.jsp

@RequestMapping("/view")
...

@RequestMapping("/action1")
@RequestMapping("/action2")
@RequestMapping("/{action}")

它更“安静”。

答案 1 :(得分:1)

正确的注释是:

@RequestMapping(
  method = RequestMethod.POST, 
  params = { "!selectedItemKey", "submit" }
)     

虽然看起来很奇怪,但是在添加第二个参数之前它没有达到此方法。

答案 2 :(得分:0)

我不太熟悉带注释的spring-mvc,但我记得在扩展MultiActionController时你可以通过定义以下spring配置来指定默认入口点:

<bean name="myController"
class="foo.bar.MyController">
<property name="methodNameResolver">
    <bean class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
        <property name="defaultMethodName" value="init" />
    </bean>
</property>


package foo.bar

public class MyController extends MultiActionController {

    /**
     * Called when no parameter was passed.
     */
    public ModelAndView init(HttpServletRequest request,
            HttpServletResponse response) {
        return new ModelAndView("myDefaultView");
    }

    /**
     * action=method1
     */
    public void method1(HttpServletRequest request,
            HttpServletResponse response) {
        return new ModelAndView("method1"); 
    }

    /**
     * action=method2
     */
    public void method2(HttpServletRequest request,
            HttpServletResponse response) {
        return new ModelAndView("method2"); 
    }
}

因此,在这种情况下,您可以通过在Spring配置上配置控制器而不是使用注释来解决此问题。