public class Customer {private long id;private String firstName, lastName;public Customer(long id, String firstName, String lastName) {this.id = id;this.firstName = firstName;this.lastName = lastName;}@Overridepublic String toString() {return String.format("Customer[id=%d, firstName='%s', lastName='%s']",id, firstName, lastName);}// getters & setters omitted for brevity
}

Spring提供了模板类 JdbcTemplate 这使得它很容易使用关系数据库SQL和JDBC。 大部分的JDBC代码、配置、异常处理和通用错误检，可以用JdbcTemplate 很好实现，你所要做的就是专注于手头的任务。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;@SpringBootApplication
public class Application implements CommandLineRunner {private static final Logger log = LoggerFactory.getLogger(Application.class);public static void main(String args[]) {SpringApplication.run(Application.class, args);}@AutowiredJdbcTemplate jdbcTemplate;@Overridepublic void run(String... strings) throws Exception {log.info("Creating tables");jdbcTemplate.execute("DROP TABLE customers IF EXISTS");jdbcTemplate.execute("CREATE TABLE customers(" +"id SERIAL, first_name VARCHAR(255), last_name VARCHAR(255))");// Split up the array of whole names into an array of first/last namesList<Object[]> splitUpNames = Arrays.asList("John Woo", "Jeff Dean", "Josh Bloch", "Josh Long").stream().map(name -> name.split(" ")).collect(Collectors.toList());// Use a Java 8 stream to print out each tuple of the listsplitUpNames.forEach(name -> log.info(String.format("Inserting customer record for %s %s", name[0], name[1])));// Uses JdbcTemplate's batchUpdate operation to bulk load datajdbcTemplate.batchUpdate("INSERT INTO customers(first_name, last_name) VALUES (?,?)", splitUpNames);log.info("Querying for customer records where first_name = 'Josh':");jdbcTemplate.query("SELECT id, first_name, last_name FROM customers WHERE first_name = ?", new Object[] { "Josh" },(rs, rowNum) -> new Customer(rs.getLong("id"), rs.getString("first_name"), rs.getString("last_name"))).forEach(customer -> log.info(customer.toString()));}
}

@SpringBootApplication包括 @Configuration @EnableAutoConfiguration @ComponentScan

使用maven构建项目，下面是maven

<?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>org.springframework</groupId><artifactId>gs-relational-data-access</artifactId><version>0.1.0</version><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.2.5.RELEASE</version></parent><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId></dependency><dependency><groupId>com.h2database</groupId><artifactId>h2</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

The Spring Boot Maven plugin 提供很多方便的特性

• 它集成的所有jar文件的类路径中,构建一个单一的、可运行的“uber-jar”,这使得它更方便执行和提供服务。

  它搜索 public staticvoid main() 标志作为一个可运行的类方法。

  它提供了一个内置的依赖项解析器,设置版本号相匹配 spring boot依赖性，你可以重写。