[刘阳Java]_BeanNameViewResolver视图解析器_第8讲

BeanNameViewResolver：这个视图解析器跟XmlViewResolver有点类似，也是通过把返回的逻辑视图名称去匹配定义好的视图bean对象。它要求视图bean对象都定义在Spring的application context中，而XmlViewResolver是在指定的配置文件中寻找视图bean对象

1. 在SpringMVC配置文件中添加BeanNameViewResolver

<bean class="org.springframework.web.servlet.view.BeanNameViewResolver">
    <property name="order" value="10" />
</bean>
<!-- 配置视图解析器 -->
<!--该视图解析器的order值为Integer.MAX_VALUE -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>

2. 创建一个HelloView类，实现View接口

import java.util.Date;
import java.util.Map;  

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

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.View;  

@Component
public class HelloView implements View{  

    public String getContentType() {
        // TODO Auto-generated method stub
        return "text/html";
    }  

    public void render(Map<String, ?> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        // TODO Auto-generated method stub
        response.getWriter().print("Welcome to View:"+new Date());
    }  

}

3. 创建控制器

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;  

@RequestMapping(value="/springmvc")
@Controller
public class MyView {
    @RequestMapping(value="/testMyView")
    public String testView(){
        System.out.println("testView");
        return "helloView";
    }
}

这里return的是视图名的第一个字母小写，springmvc会根据这个helloView名，去getBean,得到这个视图对象