简单了解Thymeleaf语法数据延迟加载使用实例

  
   org.springframework.boot
   spring-boot-starter-thymeleaf
  

package com.example.demo;

public class User {
 Integer id;
 String name;

 public User(Integer id, String name) {
  this.id = id;
  this.name = name;
 }
 public Integer getId() {
  return id;
 }
 public void setId(Integer id) {
  this.id = id;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
}

package com.example.demo;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.thymeleaf.context.LazyContextVariable;

import java.util.ArrayList;
import java.util.List;

@Controller
public class TestController {
 @RequestMapping("/{show}")
 public String test(Model model, @PathVariable("show") boolean show){
  model.addAttribute("users", new LazyContextVariable() {
   @Override
   protected Object loadValue() {
    return queryUsers();
   }
  });
  model.addAttribute("show", show);
  return "test";
 }

 private List queryUsers(){
  System.out.println("模拟查询数据，实际应用中可以直接查询数据库");
  List users = new ArrayList();
  users.add(new User(1,"张三"));
  users.add(new User(2,"李四"));
  users.add(new User(3,"王五"));
  return users;
 }
}