Java微服务(Spring-boot+MyBatis+Maven)入门教程

1，项目创建
    新建maven项目，如下图：

选择路径，下一步

输入1和2的内容，点完成

项目创建完毕，结构如下图所示：

填写pom.xml里内容，为了用于打包，3必须选择jar，4和5按图上填写

2，项目配置
2-1，application.properties
server.address=localhost
server.context-path=/
server.port=8090

#------ isosurface ---------
spring.datasource.url=jdbc:sqlserver://localhost:1433;DatabaseName=gisdemo
spring.datasource.username=sa
spring.datasource.password=sapwd1234
spring.datasource.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
2-2，pom.xml
<?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</groupId>
<artifactId>gis</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>

<name>gis.services</name>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath />
</parent>

<repositories>
<repository>
<id>in-project</id>
<name>In Project Repo</name>
<url>file:///${project.basedir}/lib</url>
</repository>
</repositories>

<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</artifactId>
<exclusions>
<exclusion>
<artifactId>spring-boot-starter-logging</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- Log4j2 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>

<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4.0</version>
</dependency>
</dependencies>

<build>
<finalName>gisServices</finalName>

<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

<description>gis.services</description>
</project>
3，部分页面
StartServer.java - 服务启动页

/**
* 服务启动
*
* @date 2017-11-28 13:16:28
*/
@SpringBootApplication //必须！
@MapperScan(basePackages = "com.gis.mapper") //必须！
public class StartServer extends SpringBootServletInitializer {

private static Class<StartServer> applicationClass = StartServer.class;

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(applicationClass);
}

public static void main(String[] args) {
SpringApplication.run(applicationClass, args);
}
}
Mapper.java - 数据访问

/**
* <p>
* Mapper 接口
* </p>
*
* @author ${author}
* @since 2017-07-25
*/
@Mapper
public interface StbprpAndDataMapper{

//List<StbprpAndData> selectDataAndStbprp(Map<String, Object> params);

@Select("SELECT A.STCD,A.STNM,A.LGTD,A.LTTD,A.STTP,B.DRP AS COMMENT FROM ST_STBPRP_B A LEFT JOIN \n" +
" (SELECT STCD,SUM(DRP) AS DRP FROM ST_PPTN_R WHERE TM <= #{endTime} and TM >= #{beginTime} GROUP BY STCD)B \n" +
" ON A.STCD=B.STCD ORDER BY B.DRP DESC")
List<StbprpAndData> selectDataAndStbprp(@Param("beginTime") String bt,@Param("endTime") String et);
}
controller 调用 

List<StbprpAndData> datalist = stbprpAndDataMapper.selectDataAndStbprp(bt, et);
4，运行
    直接运行 StartServer.java ，出现下图代表运行成功，

通过浏览器访问 http://localhost:8090/isosurface/getIso?bt=111&et=222 即可

localhost、8090 在application.properties中配置 

isosurface为controller的@RequestMapping

getIso为conrtoller里方法的@RequestMapping

bt和et为方法参数

@RestController
@RequestMapping("isosurface")
public class IsosurfaceController {

@Autowired
private StbprpAndDataMapper stbprpAndDataMapper;

@RequestMapping("getIso")
public String getIso(String bt, String et) {
List<StbprpAndData> datalist = stbprpAndDataMapper.selectDataAndStbprp(bt, et);
return "";
}
}
5，打包发布
运行—调试配置，

已经创建过的配置会如图所示，2为配置名，3和4默认不变，然后 调试，出现了BUITL SUCCESS代表打包成功，jar文件会在项目的target目录下

注意：打包会自动从maven服务器上下载jar包然后压缩，无法通过maven下载的第三方jar需要手动添加进本地maven库，如下图所示，先在lib文件夹内根据如下层级结构添加jar包

1、2、3为groupId，4为artifactId，5为版本号，然后在pom.xml中添加如下节点

<dependency>
<groupId>org.freehep.emf</groupId>
<artifactId>freehep-graphicsio-emf</artifactId>
<version>2.1.1</version>
</dependency>
并且指定本地maven库，也就是项目的lib文件夹

<repositories>
<repository>
<id>in-project</id>
<name>In Project Repo</name>
<url>file:///${project.basedir}/lib</url>
</repository>
</repositories>
更新maven 保证不报错即可，如果报错，说明层级结构建的不对，按照maven库生成的目录结构来修改项目lib里的目录结构

6，批处理运行
可直接通过cmd运行
java -jar xxxx.jar
或者创建bat批处理程序运行

@echo off

rem 判断默认jar文件是否存在，存在则启动，不存在则遍历当前目录下的jar文件并启动（只取一个，后者覆盖前者）

set jarName=gisServices.jar
set folderName=%cd%

if not exist "gisServices.jar" (
for /f "delims=\" %%f in (‘dir /b /a-d /o-d "%folderName%\*.jar"‘) do (
set jarName=%%f
)
)

::echo %jarName%
java -jar %jarName%
pause
7，其他
配置文件 application.properties 可放到jar同级目录内，外部的配置文件优先级要高于jar包内部的，jar包运行时会自动去查找然后调用配置信息，配置修改后重启服务即可。

参考文档：https://blog.csdn.net/t123y456m/article/details/79726399 

原文：https://www.cnblogs.com/william-dai/p/10899798.html