创建springboot 标准工程（MyBatis）
Posted legion
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了创建springboot 标准工程（MyBatis）相关的知识，希望对你有一定的参考价值。
实现目标：
创建一个简单的数据库demo，表名mach，id为自增，mach_no为字符串
创建Maven的jar工程，pom.xml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.legion</groupId> <artifactId>standard</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <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-devtools</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.28</version> </dependency> </dependencies> </project>
创建常规的package
com.legion.controller
com.legion.dao
com.legion.pojo
com.legion.service
创建包com.legion，新建类MyBootDemo，其中有main函数
@SpringBootApplication public class MyBootDemo { public static void main(String[] args) { // TODO Auto-generated method stub SpringApplication.run(MyBootDemo.class,args); } }
注意：其他包必须和springboot入口的package同级，或者处于下一级。
看到了有的工程在此处使用了
@ComponentScan(basePackages="XX.YY")
@MapperScan(basePackages="XX.YY.ZZ")
在src/main/resources建立application.properties文件
#下面这一行指定Mapper xml文件位置，发现不配置也可以
mybatis.mapper-locations=classpath:com/legion/dao/*.xml spring.datasource.url=jdbc:mysql://localhost:3306/demo spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.username=root spring.datasource.password=123456
使用Druid的参考配置
#durid
spring.datasource.type = com.alibaba.druid.pool.DruidDataSource
spring.datasource.druid.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.druid.url = jdbc:mysql://localhost:3306/springboot_mybatis
spring.datasource.druid.username=root
spring.datasource.druid.password=root
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
spring.datasource.druid.initialSize=5
spring.datasource.druid.minIdle=5
spring.datasource.druid.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.druid.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.datasource.druid.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.druid.minEvictableIdleTimeMillis=300000
spring.datasource.druid.validationQuery=SELECT 1 FROM DUAL
spring.datasource.druid.testWhileIdle=true
spring.datasource.druid.testOnBorrow=false
spring.datasource.druid.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.druid.poolPreparedStatements=true
spring.datasource.druid.maxPoolPreparedStatementPerConnectionSize=20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，\'wall\'用于防火墙
spring.datasource.druid.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.druid.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
spring.datasource.druid.useGlobalDataSourceStat=true
使用yml的一个参考配置
server:
port: 8080
spring:
datasource:
name: test
url: jdbc:mysql://127.0.0.1:3306/depot
username: root
password: root
# 使用druid数据源
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
filters: stat
maxActive: 20
initialSize: 1
maxWait: 60000
minIdle: 1
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: select \'x\'
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxOpenPreparedStatements: 20
下面的内容和标准的SSM区别不大，注意Mapper接口加上@Mapper注解。
com.leigon.controller中UserController.java的内容
@RestController public class UserController { @Autowired private MachineService ms; @RequestMapping("/all") public List<Machine> findAll(){ return ms.findAll(); } @RequestMapping("/hello") public String show() { return "hello,world"; } }
com.legion.dao
MachineMapper.java
@Mapper public interface MachineMapper { public List<Machine> findAll(); }
MachineMapper.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="com.legion.dao.MachineMapper"> <select id="findAll" resultType="com.legion.pojo.Machine"> select * from mach </select> </mapper>
com.legion.pojo中的Machine.java
public class Machine { private int id; private String mach_no; //getter and setter ... }
com.legion.service接口和实现
public interface MachineService { public List<Machine> findAll(); } @Service public class MachineServiceImpl implements MachineService { @Autowired private MachineMapper machine; @Override public List<Machine> findAll() { return machine.findAll(); } }
打包
pom.xml添加
<build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
然后右键项目，run as=-Maven Install，target目录中生成相应的jar文件。
方法2：run as -Maven Build填写package
如果出现No compiler is provided in this environment 的错误，
保证这里是JDK中的JRE
还有这里勾选上
额外阅读 ，阅读2 ，，阅读3，
在CentOS上部署运行
https://blog.csdn.net/lhc0512/article/details/80635929
以上是关于创建springboot 标准工程（MyBatis）的主要内容，如果未能解决你的问题，请参考以下文章