仿牛客网各种错误集合（一）1.结束8080端口占用 netstat -ano

1.结束8080端口占用

netstat -ano | findstr :8080

taskkill /PID 7036 /F

2.提示Junit-vintage错误

TestEngine with ID’junit-vintage’failedto discover tests” with Spring

导包错误，改成下面：

import org.junit.Test;

3.自己手动导入

<dependency> 
  <groupId>org.springframework.boot</groupId>  
 <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

4.设置模板

File=》Editor=》File and Code Templates=》File Header=》自己设置模板样式

/**
 * @Author:
 * @Date: ${DATE} ${TIME}
 * @Version 1.0
 */

@Scope("prototype")

@Scope("singleton")

@Qualifier

7.依赖注入

@Autowired    
private AlphaDao alphaDao;   
@Autowired    
private AlphaService alphaService;    
@Autowired    
private SimpleDateFormat simpleDateFormat;    
@Test   
 public void testDI() {        
System.out.println(alphaDao);        
System.out.println(alphaService);        
System.out.println(simpleDateFormat.format(new Date()));    
}}

8.响应HTML数据

1.controller

//响应HTML数据
@RequestMapping(path = "/teacher", method = RequestMethod.GET)
public ModelAndView getTeacher() {    
ModelAndView mav = new ModelAndView();    
mav.addObject("name", "张三");    
mav.addObject("age", "20");    
mav.setViewName("/demo/view");    
return mav;}

<!DOCTYPE html><html lang="en" xmlns:th =" http://www.thymeleaf.org">
<head>    
<meta charset="UTF-8">    
<title>Teacher</title>
</head>
<body>
<p th:text="${name}"></p>
<p th:text="${age}"></p>
</body>
</html>

2.第二种方式

@RequestMapping(path ="/school",method = RequestMethod.GET)
public String getSchool(Model model){    
model.addAttribute("name","北京大学");    
model.addAttribute("age",80);    
return "/demo/view";
}

9.集合

@RequestMapping(path = "/emps", method = RequestMethod.GET)
@ResponseBody
public List<Map<String, Object>> getEmps() {    
List<Map<String, Object>> list = new ArrayList<>();    
Map<String, Object> emp = new HashMap<>();    
emp.put("name","张三");    
emp.put("age",23);    
emp.put("salary",800.00);    
list.add(emp);    

emp = new HashMap<>();    
emp.put("name","李四");    
emp.put("age",30);    
emp.put("salary",900.00);    
list.add(emp); 
   
emp = new HashMap<>();    
emp.put("name","王五");    
emp.put("age",80);    
emp.put("salary",7000.00);    
list.add(emp);
        
return list;}