VIP23/springBoot/src/main/java/com/sf/springboot/controller/HelloWordController.java

package com.sf.springboot.controller;

import com.sf.springboot.entity.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.util.*;


@Controller
public class HelloWordController {

    @GetMapping("/helloworld")
    public String helloworld(){
        System.out.println("helloworld");
        return "ok";
    }

    @RequestMapping("/HelloThymeleaf")
    public String HelloThymeleaf(Model model, HttpServletRequest request){
        //显示普通文本,从域对象中获取
        model.addAttribute("username","Tom");
        //显示带有样式的普通文本
        model.addAttribute("desc","<span style='color:red'>你好,中国</span>");
        //显示对象,数据处理(thymeleaf提供了内置对象API可以操作数据,比如对前端显示时间的格式化)
        User user = new User(1001,"user01",new Date());
        model.addAttribute("user",user);
        //内置域对象
        request.setAttribute("password","123456");
        //数据遍历 list
        User user1 = new User(1002,"user02",new Date());
        User user2 = new User(1003,"user03",new Date());
        User user3 = new User(1004,"user04",new Date());
        List<User> users = new ArrayList<>();
        users.add(user1);
        users.add(user2);
        users.add(user3);
        model.addAttribute("users",users);
        //数据遍历 map
        Map<String,User> map = new HashMap<>();
        map.put("user01",user1);
        map.put("user02",user2);
        map.put("user03",user3);
        model.addAttribute("map",map);
        return "result";
    }
}