BeanNameViewResolver类简介说明

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BeanNameViewResolver类简介说明

下文笔者讲述BeanNameViewResolver类的简介说明，如下所示:

BeanNameViewResolver视图解析器同XmlViewResolver相同，
都是使用逻辑视图名称同bean对象进行匹配解析

例：   使用模板生成excel文件

控制器配置control-context.xml


 
    
        
    



    
      
      　　viewController
    
  


Excel视图ExcelView.java

public class ExcelView extends AbstractExcelView {
    protected void buildExcelDocument(Map model,
            HSSFWorkbook wb, HttpServletRequest request, HttpServletResponse reqponse)
            throws Exception {
        
        //...
         Object[] datas = (Object[]) model.get("data");
        //...        
        
        HSSFSheet sheet;
        //get the sheet 1 in template
        sheet = wb.getSheetAt(0);
        //handle this sheet
        //...
    }
}

实现 org.springframework.web.servlet.view.document.AbstractExcelView 类中的 buildExcelDocument方法。

3. ViewController控制器 ViewController.java
public class ViewController extends MultiActionController {
    private DataModel dataModel;
    public void setDataModel(DataModel dataModel){
        this.dataModel = dataModel;
    }
    
    public ModelAndView exportToExcel(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Map model=new HashMap();
        Object[] datas;
        datas = dataModel.getDatas.toArray();
        model.put("data", datas);
        ExcelView excelView = new ExcelView();
        excelView.setApplicationContext(this.getWebApplicationContext());
        excelView.setUrl("/WEB-INF/Template");
        
        return new ModelAndView(excelView,model);
    }
}

4. 配置web.xml

   viewController
   org.springframework.web.servlet.DispatcherServlet
   
       contextConfigLocation
       /WEB-INF/config/control-context.xml
   
   1


   viewController
   *.report


5. 运行http://hostname/view/exportToExcel.report

---

例2： TestView

1.在SpringMVC配置文件中添加BeanNameViewResolver

  
      
     

  
  
      
      


2.创建一个TestView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 TestView implements View{  
    public String getContentType() {  
        // TODO Auto-generated method stub  
        return "text/html";  
    }  
    public void render(Map 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";
    }  
}

此时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