Spring Boot入门第二天：一个基于Spring Boot的Web应用，使用了Spring Data JPA和Freemarker。详解编程语言

<?xml version="1.0" encoding="UTF-8"?> 
<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.yws710.springboot</groupId> 
    <artifactId>demo1</artifactId> 
    <version>1.0-SNAPSHOT</version> 
    <packaging>war</packaging> 
 
    <parent> 
        <groupId>org.springframework.boot</groupId> 
        <artifactId>spring-boot-starter-parent</artifactId> 
        <version>1.5.4.RELEASE</version> 
    </parent> 
 
    <dependencies> 
        <dependency> 
            <groupId>org.springframework.boot</groupId> 
            <artifactId>spring-boot-starter-web</artifactId> 
        </dependency> 
 
        <!-- spring-data-jpa --> 
        <dependency> 
            <groupId>org.springframework.boot</groupId> 
            <artifactId>spring-boot-starter-data-jpa</artifactId> 
        </dependency> 
 
        <!-- 使用Freemarker替代JSP做页面渲染 --> 
        <dependency> 
            <groupId>org.springframework.boot</groupId> 
            <artifactId>spring-boot-starter-freemarker</artifactId> 
        </dependency> 
 
        <!-- mysql驱动 --> 
        <dependency> 
            <groupId>mysql</groupId> 
            <artifactId>mysql-connector-java</artifactId> 
        </dependency> 
    </dependencies> 
</project>

spring.datasource.url=jdbc:mysql://localhost:3306/springbootdemo1 
spring.datasource.username=root 
spring.datasource.password=root 
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.hbm2ddl.auto=update

package com.yws710.springboot.demo1.domain; 
 
import javax.persistence.*; 
import java.io.Serializable; 
import java.math.BigDecimal; 
import java.util.Date; 
 
@Entity 
@Table(name="t_user") 
public class User implements Serializable { 
 
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private int id; 
    private String name; 
    private Date birthday; 
    private BigDecimal salary; 
 
    public User(){} 
 
    public User(int id, String name, Date birthday, BigDecimal salary) { 
        this.id = id; 
        this.name = name; 
        this.birthday = birthday; 
        this.salary = salary; 
    } 
 
    public int getId() { 
        return id; 
    } 
 
    public void setId(int id) { 
        this.id = id; 
    } 
 
    public String getName() { 
        return name; 
    } 
 
    public void setName(String name) { 
        this.name = name; 
    } 
 
    public Date getBirthday() { 
        return birthday; 
    } 
 
    public void setBirthday(Date birthday) { 
        this.birthday = birthday; 
    } 
 
    public BigDecimal getSalary() { 
        return salary; 
    } 
 
    public void setSalary(BigDecimal salary) { 
        this.salary = salary; 
    } 
}

package com.yws710.springboot.demo1.repository; 
 
import com.yws710.springboot.demo1.domain.User; 
import org.springframework.data.jpa.repository.JpaRepository; 
 
public interface UserRepository extends JpaRepository<User, Integer> { 
 
}

package com.yws710.springboot.demo1.service; 
 
import com.yws710.springboot.demo1.domain.User; 
 
import java.util.List; 
 
public interface UserService { 
 
    List<User> userList(); 
}

package com.yws710.springboot.demo1.service.impl; 
 
import com.yws710.springboot.demo1.domain.User; 
import com.yws710.springboot.demo1.repository.UserRepository; 
import com.yws710.springboot.demo1.service.UserService; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Service; 
 
import java.util.List; 
 
@Service 
public class UserServiceImpl implements UserService { 
 
    @Autowired 
    UserRepository userRepository; 
 
    @Override 
    public List<User> userList() { 
        return userRepository.findAll(); 
    } 
}

package com.yws710.springboot.demo1.controller; 
 
import com.yws710.springboot.demo1.service.UserService; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Controller; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.ResponseBody; 
import org.springframework.web.servlet.ModelAndView; 
 
@Controller 
@RequestMapping("/user") 
public class UserController { 
 
    @Autowired 
    UserService userService; 
 
    @RequestMapping("/list") 
    public ModelAndView userList() throws Exception { 
        ModelAndView mv = new ModelAndView(); 
        mv.addObject("userList", userService.userList()); 
        mv.setViewName("/user/list"); 
 
        return mv; 
    } 
}

<!DOCTYPE html> 
<html lang="zh-CN"> 
<head> 
    <meta charset="UTF-8"> 
    <title>用户列表</title> 
    <link href="/css/main.css" rel="stylesheet" /> 
</head> 
<body> 
    <table> 
        <thead> 
            <tr> 
                <th>ID</th> 
                <th>姓名</th> 
                <th>生日</th> 
                <th>薪资</th> 
            </tr> 
        </thead> 
        <tbody> 
            <#list userList as user> 
            <tr> 
                <td>${user.id}</td> 
                <td>${user.name}</td> 
                <td>${user.birthday?string('yyyy-MM-dd')}</td> 
                <td>${user.salary}</td> 
            </tr> 
            </#list> 
        </tbody> 
    </table> 
</body> 
</html>

package com.yws710.springboot.demo1; 
 
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
 
@SpringBootApplication 
public class App { 
 
    public static void main(String[] args) { 
        SpringApplication.run(App.class, args); 
    } 
 
}