SpringMvc的xml配置與annotation配置的例子的區別

我是壞男孩發表於2016-10-15
SpringMVCXML

1.匯入jar包時,要在xml配置基礎上加 spring-aop-4.2.2.RELEASE.jar （註解的時候需要）

2.編寫controller的時候要annotation需要做相關配置即紅色部分，而xml就是要實現controller的介面

（a）annotation配置時

package com.spring.hello;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.stereotype.Controller;
@Controller
public class HelloController {
  @RequestMapping("/hello")
  public ModelAndView hello(HttpServletRequest req,HttpServletResponse resp)
  {   
        ModelAndView mv=new ModelAndView();
        mv.addObject("msg", "第一個annotation");
        mv.setViewName("Hello");
        return mv;
  }
}

　　

（b）xml配置時
package com.spring.hello;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class HelloController implements Controller{

@Override
public ModelAndView handleRequest(HttpServletRequest arg0,
HttpServletResponse arg1) throws Exception {
// TODO Auto-generated method stub
ModelAndView mv=new ModelAndView();
mv.addObject("msg", "第一個SpringMvc");
mv.setViewName("Hello");
return mv;
}

}

3.在SpringMvc檔案annotation不需要

<!--  配置hanlderMapping  -->
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
	<!--  配置 handlerAdapter-->
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>

但是要把

<!--  配置請求和處理器	-->
	<bean  name="/hello.do" class="com.spring.hello.HelloController"></bean>

　　修改成

	<!--  配置請求和處理器	-->
	<context:component-scan base-package="com.spring.hello"></context:component-scan>

　　

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