springboot 简单搭建(thymeleaf 视图显示)

接口访问参考：https://blog.csdn.net/hanjun0612/article/details/81625395

PS:调用接口和跳转网页

主要区别是

1 调用接口是 @RestController

跳转网页是：@Controller

2 跳转网页，需要增加

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

一，IDEA创建项目

File-->New-->Project-->Spring Initializr

然后选择 web和web-starter

然后我们看一下搭建好的项目结构：

二，搭建

先添加POM依赖

pom

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>

然后添加配置文件

这里主要添加 application.yml和 application-dev.yml  就可以了

application.yml：（它会通过active:dev去调用application-dev.yml）

spring:
  profiles:
    active: dev
  datasource:
    url: jdbc:mysql://ip地址:3306/testdb?serverTimezone=UTC
    username: root
    password: root
  jpa:
    generate-ddl: false
    hibernate:
      ddl-auto: none
    show-sql: true
  thymeleaf:
    prefix: classpath:/templates/
    suffix: .html
    mode: HTML5
    encoding: UTF-8
    cache: false
    servlet:
      content-type: text/html

application-dev.yml：

server:
  servlet:
    context-path:
  port: 8081

DemoApplication:

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

User

@Entity
@Table(name = "user", catalog = "testdb")
@DynamicUpdate
public class User {
    private Integer id;
    private String uuid;
    private String userName;
    private String password;
    private Date createTime;
    private Integer age;

    @Id
    @GeneratedValue
    @Column(name = "id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @Column(name = "uuid")
    public String getUuid() {
        return uuid;
    }

    public void setUuid(String uuid) {
        this.uuid = uuid;
    }

    @Column(name = "username")
    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    @Column(name = "password")
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Column(name = "createtime")
    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    @Column(name = "age")
    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

UserRepository

@Repository
public interface UserRepository extends JpaRepository<User,Integer> {
}

HelloController

@Controller
public class HelloController {

    @Autowired
    UserRepository userRepository;

    @RequestMapping("/index.do")
    public String say(ModelMap mode) {
        User user=userRepository.findById(3).get();
        mode.addAttribute("user", user);
        return "say";
    }
}

say.html

<span th:text="${user.userName}"></span>
hello
</body>

最后效果：