麻烦老师看一下为什么没有数据

package com.imooc.o2ov2.web.RESTful;

import com.alibaba.fastjson.JSON;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.ArrayList;
import java.util.List;
@Controller
public class RESTful {

    @RequestMapping("/emp/list/{DEPT}")
    @ResponseBody
    public String list(@PathVariable("DEPT") String dept){
        List<Employee> list = new ArrayList<>();
        if(dept.equals("DEPT")){
            list.add(new Employee(1,"张三","男"));
            list.add(new Employee(2,"李四","女"));
            list.add(new Employee(3,"王五","男"));
        }
        System.out.println(dept);
        return JSON.toJSONString(list);
    }
}