springboot起步，完成一个简单的登陆注册

准备工作：安装maven，并在eclipse中配置maven

1、创建一个maven项目，选择quickstar

2、修改管理包依赖的文件pom.xml

我的文件内容如下：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.shyf.demo</groupId>
    <artifactId>spring_demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>spring_demo</name>
    <url>http://maven.apache.org</url>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.2.RELEASE</version>
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <!-- 加入这个依赖，得到一个基于spring MVC 的web应用 -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <!-- 项目热部署 -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <!-- 实现Java对象与数据库数据的映射 -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    </dependencies>
</project>

3、创建了几个必要的包

4、创建用户实体类

  import javax.persistence.Column;
  import javax.persistence.Entity;
  import javax.persistence.Id;
  import javax.persistence.Table;

@Entity
@Table(name="t_user")
public class User {
    private String id;
    private String username;
    private String password;
    @Id
    @Column(name="id",unique=true)
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    @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;
    }
}

5、用户对应的dao层

import org.springframework.data.jpa.repository.JpaRepository;
import com.shyf.demo.spring_demo.entity.User;

public interface UserDao extends JpaRepository<User, String>{
    
}

6、controller层

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import com.shyf.demo.spring_demo.dao.UserDao;
import com.shyf.demo.spring_demo.entity.User;

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserDao userDao;
    
    @GetMapping("/")
    public String index() {
        return "index";
    }
    @GetMapping("/login")
    public String login() {
        return "login";
    }
    @GetMapping("/zhuce")
    public String zhuce() {
        return "zhuce";
    }
    @PostMapping("/save")
    public String save(String username,String password) {
        User user = new User();
        user.setId(UUID.randomUUID().toString());
        user.setUsername(username);
        user.setPassword(password);
        userDao.save(user);
        return "login";
    }
}

7、配置数据源

springboot的配置文件application.properties(要放在src/main/resources,没有的话自己创建)

数据源配置信息

#mysql
spring.datasource.initialize=false
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

8、数据库设计

创建表t_user三个字段id，username，password都是varchar

9、页面编写(要放在src/main/resources/template,没有的话自己创建)

10、注册页面的代码

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="//cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
<title>用户注册</title>
<script type="text/javascript">
    /*<![CDATA[*/
    
    /*]]>*/
</script>
</head>
<body>
    <form action="/user/save" method="POST">
        <input type="text" name="username" />   
        <input type="password" name="password" />
        <input type="submit" value="注册" />  
    </form>

</body>
</html>

 11、启动

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