记录一个Spring MVC Controller层，跳转到前端页面以及返回参数的包装类

以下两个为常用方法

1. 进入到前端页面的方法为   createMav()

2. 返回ajax请求的方法为 successResponse()

 

代码实现 如下 ：

 

import java.util.HashMap;
import java.util.Map;

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

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;

/** Created by HUYONG on 2017/9/8*/
public abstract class BaseController {

   public HttpServletRequest getRequest() {
      HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder
              .getRequestAttributes()).getRequest();
      return request;
   }

   public HttpServletResponse getResponse() {
      HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder
              .getRequestAttributes()).getResponse();
      return response;
   }

   public Result successResponse() {
      return successResponse(null);
   }
   
   public Result successResponse(Map<String, Object> model) {
      Result result = new Result();
      result.setRet(200);
      result.setMsg("success");
      result.setModel(model);
      return result;
   }
   
   public Result successResponse(Map<String, Object> model, String msg) {
      Result result = new Result();
      result.setRet(200);
      result.setMsg(msg);
      result.setModel(model);
      return result;
   }

   public ModelAndView createMav(String viewName, Map<String, ?> model) {
      return new ModelAndView(viewName, model);
   }
   public int getStart(Integer start){
      return start == null? 0 : start.intValue();
   }
   public int getLimit(Integer limit){
      return limit == null? 10 : limit.intValue();
   }

   @JsonInclude(Include.NON_NULL)
   public static class Result {
      private int ret;

      private String msg;
      
      private Map<String, Object> model;

      public int getRet() {
         return ret;
      }

      public void setRet(int ret) {
         this.ret = ret;
      }

      public String getMsg() {
         return msg;
      }

      public void setMsg(String msg) {
         this.msg = msg;
      }

      public Map<String, Object> getModel() {
         return model;
      }

      public void setModel(Map<String, Object> model) {
         this.model = model;
      }

      public void addModel(String key, Object object) {
         if (model == null) {
            model = new HashMap<>();
         }
         model.put(key, object);
      }

   }
}

 

controller层具体使用 如下

 

@Controller
@RequestMapping("/admin/courseMt")
public class CourseMaintenanceController extends BaseController{
   

    /**
     * 进入web-inf 目录下的admin目录的index.jsp ,并传递参数 a  ,index 页面 用 ${a} 获取
     * @return
     */
    @RequestMapping("/index")
    public ModelAndView index(){
        Map<String,Object> map = Maps.newConcurrentMap();
        map.put("a","1");
        return createMav("admin/index",map);
    }

    /**
     * 返回前端JS发送ajax请求响应 ， 由于 BaseController 进行封装，所以ajax返回数据用 data.model.a 获取
     * @return
     */
    @RequestMapping("/getCourseMtList")
    @ResponseBody
    public Result getCourseMtList(int pageNum,int pageSize){
        Map<String,Object> map = Maps.newConcurrentMap();
        map.put("a","1");
        return successResponse(map);    }

}