Spring 梳理-传递模型数据到视图

传递model，返回string，不指定返回key

package com.jt;
import com.myOrg.DeptUserDomain;

@Controller
@RequestMapping(value="/FirstControl")
public class HelloControl {
    @RequestMapping("/viewdud")
    public String viewDeptUser(Model model){
        DeptUserDomain dud=new DeptUserDomain();
        dud.setId("1");
        dud.setName("zs");
        dud.setSalary(10000);
        dud.setHireDate(new Date(100));
        model.addAttribute(dud);
        return "deptUser";
    }
}

<body>
viewDeptUser<br>
${deptUserDomain.id}<br>
</body>

传递model，返回string，指定返回key

       @RequestMapping("/viewdud")
    public String viewDeptUser(Model model){
        DeptUserDomain dud=new DeptUserDomain();
        dud.setId("1");
        dud.setName("zs");
        dud.setSalary(10000);
        dud.setHireDate(new Date(100));
        model.addAttribute("data",dud);
          
        return "deptUser";
    }

<body>
viewDeptUser<br>
${data.id}<br>
</body>

传递map，返回string，必须指定返回key。（可避免被Spring类型的Model污染代码）

    @RequestMapping("viewdudByMap")
    public String viewDeptUserByMap(Map map){
        DeptUserDomain dud=new DeptUserDomain();
        dud.setId("1");
        dud.setName("zs");
        dud.setSalary(10000);
        map.put("dataByMap",dud);
        return "deptUser";
    }

<body>
viewDeptUser<br>
${dataByMap.id}<br>
</body>

传递空，返回data

@Controller
@RequestMapping(value="/FirstControl")
public class HelloControl {
 @RequestMapping("/viewdudByReturn")
 public DeptUserDomain viewDeptUserByReturn(){
  DeptUserDomain dud=new DeptUserDomain();
  dud.setId("1");
  dud.setName("zs");
  dud.setSalary(10000);
  return dud;
 }
}

 系统自动根据请求路径进行推断设置，视图名称为viewdudByReturn,jsp路径为 /WEB-INF/FirstControl/viewdudByReturn.jsp ，
相当于返回的String为“/FirstControl/viewdudByReturn”
<body>
viewDeptUser<br>
${deptUserDomain.id}<br>
</body>