spring boot+mybatis搭建一个后端restfull服务的实例详解-eolink官网

spring boot+mybatis搭建一个后端restfull服务的实例详解

1、创建一个maven项目。

2、在pom.xml中引入依赖包，如下所示：

xmlns:xsi="http://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">

4.0.0

com.best

spring-boot-mybatis

1.0-SNAPSHOT

1.8

1.2.74

5.3.5.RELEASE

UTF-8

org.springframework.boot

spring-boot-starter-parent

2.3.5.RELEASE

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-test

test

org.springframework.boot

spring-boot-starter-jdbc

org.apache.tomcat

tomcat-jdbc

org.mybatis.spring.boot

mybatis-spring-boot-starter

2.1.3

mysql

mysql-connector-java

8.0.22

com.alibaba

druid

1.2.1

com.alibaba

fastjson

${fastjson.version}

org.projectlombok

lombok

1.18.10

org.mybatis.spring.boot

mybatis-spring-boot-starter

2.1.3

org.apache.maven.plugins

maven-compiler-plugin

3.8.0

1.8

xmlns:xsi="http://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">

4.0.0

com.best

spring-boot-mybatis

1.0-SNAPSHOT

1.8

1.2.74

5.3.5.RELEASE

UTF-8

org.springframework.boot

spring-boot-starter-parent

2.3.5.RELEASE

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-test

test

org.springframework.boot

spring-boot-starter-jdbc

org.apache.tomcat

tomcat-jdbc

org.mybatis.spring.boot

mybatis-spring-boot-starter

2.1.3

mysql

mysql-connector-java

8.0.22

com.alibaba

druid

1.2.1

com.alibaba

fastjson

${fastjson.version}

org.projectlombok

lombok

1.18.10

org.mybatis.spring.boot

mybatis-spring-boot-starter

2.1.3

org.apache.maven.plugins

maven-compiler-plugin

3.8.0

1.8

3、在使用mybatis之前，那么首先需要创建数据表，如：

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`name` varchar(255) COLLATE utf8_bin DEFAULT NULL,

`create_date` datetime DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

-- ----------------------------

-- Records of user

-- ----------------------------

INSERT INTO `user` VALUES ('1', 'user1', '2020-11-10 21:01:54');

INSERT INTO `user` VALUES ('2', 'user2', '2020-11-01 21:02:12');

4、然后配置数据库连接池，这里使用的是alibaba的druid，首先在resources中新建一个application.yml文件，内容如下：

spring:

datasource:

type: com.alibaba.druid.pool.DruidDataSource

driver-class-name: com.mysql.cj.jdbc.Driver

platform: mysql

url: jdbc:mysql://localhost:3306/springboottest?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=CTT

username: root

password:

server:

port: 8080

5、然后新建一个包com.best.db，并新建一个DruidDBConfig类，代码如下：

package com.best.db;

import com.alibaba.druid.pool.DruidDataSource;

import org.apache.ibatis.session.SqlSessionFactory;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Primary;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**

* @author:sunxj

* @date:2020-11-10 21:08:53

* @description: 数据连接池

@Configuration

public class DruidDBConfig {

@Value("${spring.datasource.url}")

private String url;

@Value("${spring.datasource.username}")

private String username;

@Value("${spring.datasource.password}")

private String password;

@Value("${spring.datasource.driver-class-name}")

private String driverClassName;

@Bean//DataSource 对象为 Spring 容器所管理;

@Primary//表示这里定义的DataSource将覆盖其他来源的DataSource。

public DataSource dataSource(){

DruidDataSource datasource = new DruidDataSource();

datasource.setUrl(this.url);

datasource.setUsername(username);

datasource.setPassword(password);

datasource.setDriverClassName(driverClassName);

return datasource;

}

//配置数据库事务

@Bean(name = "transactionManager")

public DataSourceTransactionManager dbOneTransactionManager(

@Qualifier("dataSource") DataSource dataSource) {

return new DataSourceTransactionManager(dataSource);

}

//配置数据库工厂

@Bean(name = "sqlSessionFactory")

@ConditionalOnMissingBean(name = "sqlSessionFactory")

public SqlSessionFactory dbOneSqlSessionFactory(@Qualifier("dataSource") DataSource dataSource) throws Exception {

final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();

sessionFactory.setDataSource(dataSource);

return sessionFactory.getObject();

}

6、配置好连接池，那么就可以开始配置entity了，也就是与表映射的实体类，这里我们使用lombok的注解自动生成set和get方法，那么新建一个com.best.entity包，并新建一个User类，如：

package com.best.entity;

import lombok.AllArgsConstructor;

import lombok.Data;

import lombok.NoArgsConstructor;

import java.util.Date;

/**

* @author:sunxj

* @date:2020-11-10 21:12:58

* @description:用户实体类

@Data

@AllArgsConstructor

@NoArgsConstructor

public class User {

private Integer id;

private String name;

private Date createDate;

}

7、实体类创建好了之后，那么就是创建mybatis映射文件以及类了，这里的映射接口文件和Mapper.xml文件放到一起，首先创建一个com.best.dbo包，映射接口文件和.xml都放到这个包中，并创建一个接口UserMapper，如：

package com.best.dao;

import com.best.entity.User;

import org.springframework.stereotype.Repository;

import java.util.List;

/**

* @author:sunxj

* @date:2020-11-10 21:17:27

* @description:用户表的映射接口文件

@Repository

public interface UserMapper {

List selectAll();

User selectById(Integer id);

}

8、配置Mapper映射的xml文件，文件名为UserMapper.xml：

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

SELECT * FROM user

SELECT * FROM user WHERE id=#{id}

9、在配置好之后就可以在application.xml来指定mybatis扫描哪些映射文件，配置如下：

spring:

datasource:

type: com.alibaba.druid.pool.DruidDataSource

driver-class-name: com.mysql.cj.jdbc.Driver

platform: mysql

url: jdbc:mysql://localhost:3306/springboottest?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=CTT

username: root

password:

mybatis:

#如果有多个目录则可以写多个，比如com/best/dao/*.xml，com/best/*/dao/*.xml,com/best/*/sss/*/dao/*.xml

mapper-locations: classpath:com/best/dao/*.xml

#配置包，这里同样可以配置多个，

type-aliases-package: com.best.dao

server:

port: 8080

10、配置好之后就开始配置service以及impl了，首先创建一个service和service/impl包，并在service下创建一个IUserService接口，并在impl下来实现该接口UserServiceImpl，代码如下：

package com.best.service;

import com.best.entity.User;

import java.util.List;

/**

* @author:sunxj

* @date:2020-11-10 21:33:23

* @description:用户接口表

public interface IUserService {

List selectAll();

User selectById(Integer id);

}

package com.best.service.impl;

import com.best.dao.UserMapper;

import com.best.entity.User;

import com.best.service.IUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import java.util.List;

/**

* @author:sunxj

* @date:2020-11-10 21:34:34

* @description:用户接口实现类

@Service("userService")

public class UserServiceImpl implements IUserService {

@Autowired

private UserMapper userMapper;

@Override

public List selectAll() {

return userMapper.selectAll();

}

@Override

public User selectById(Integer id) {

return userMapper.selectById(id);

}

11、在创建好service后，需要创建一个controller，如UserController，代码如下：

package com.best.controller;

import com.alibaba.fastjson.JSONObject;

import com.best.service.IUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* @author:sunxj

* @date:2020-11-10 21:38:09

* @description:

@RestController//使用此注解，那么该类下的所有返回都是以json方式返回

@RequestMapping(value="best")//加上value后，在url访问时必须加上/best才行

public class UserController {

@Autowired

private IUserService userService;

@RequestMapping("/getUser")

public JSONObject getUser(HttpServletRequest request, HttpServletResponse response) {

JSONObject obj = new JSONObject();

obj.put("user","1111");

return obj;

}

12、创建好之后，最后创建一个spring-boot的入口文件，代码如下：

package com.best;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

/**

* @author:sunxj

* @date:2020-11-10 21:46:43

* @description:

@SpringBootApplication

public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class,args);

}

13、此时启动会提示无法找到com.best.dao.UserMapper，如：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

2020-11-10 21:48:21.635 ERROR 10320 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :

***************************

APPLICATION FAILED TO START

***************************

Description:

Field userMapper in com.best.service.impl.UserServiceImpl required a bean of type 'com.best.dao.UserMapper' that could not be found.

The injection point has the following annotations:

- @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'com.best.dao.UserMapper' in your configuration.

14、出现此问题是由于springboot在启动时，在UserServiceImpl中又使用到了UserMapper的自动注入，而springboot启动时就没有扫描到UserMapper，更不可能将它作为bean注入到IOC容器中，因此就无法注入了，那么需要再入口的main文件上加上@MapperScan即可，如：

package com.best;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

/**

* @author:sunxj

* @date:2020-11-10 21:46:43

* @description:

@SpringBootApplication

@MapperScan({"com.best.dao"})//如果有多个可以使用{"com.best.dao","com.best.sss.dao"}

public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class,args);

}

15、此时即可正常启动，如下图所示：

16、此时在浏览器中输入：http://localhost:8080/best/getUser即可，如下图所示：

17、以上只是搭建一个可以正常通过url访问，那么现在来访问数据库中的记录，在访问之前先创建一些封装类，比如将实体类封装成json、返回状态码等，先创建一个common包，在该包下创建entity、enums、utils等包，如下图所示：

18、然后在enums中创建一个ResultCode枚举类，此来定义了一些返回状态码信息，如下代码所示：

package com.best.common.enums;

/**

* @author:sunxj

* @date:2020-11-10 22:08:11

* @description:返回码定义

public enum ResultCode {

//成功

SUCCESS(200,"成功"),

//默认失败

COMMON_FAIL(404,"失败"),

;

private Integer code;

private String message;

ResultCode(Integer code, String message) {

this.code = code;

this.message = message;

}

public Integer getCode() {

return code;

}

public void setCode(Integer code) {

this.code = code;

}

public String getMessage() {

return message;

}

public void setMessage(String message) {

this.message = message;

}

public static String getMessageByCode(Integer code) {

for (ResultCode ele : values()) { //values会默认取出enum中的值对象列表，每个值都是一个ResultCode对象

if (ele.getCode().equals(code)) {

return ele.getMessage();

}

return null;

}

19、然后在entity中新建一个JsonResult类，用来封装统一返回的实体类，如：

package com.best.common.entity;

import com.best.common.enums.ResultCode;

import java.io.Serializable;

/**

* @author:sunxj

* @date:2020-11-10 22:06:50

* @description:统一返回的实体类

public class JsonResult implements Serializable {

private Boolean success;

private Integer errorCode;

private String errorMsg;

private T data;

public JsonResult() {

}

public JsonResult(Boolean success) {

this.success = success;

this.errorCode = success ? ResultCode.SUCCESS.getCode():ResultCode.COMMON_FAIL.getCode();

this.errorMsg = success ? ResultCode.SUCCESS.getMessage():ResultCode.COMMON_FAIL.getMessage();

}

public JsonResult(Boolean success,ResultCode resultCode) {

this.success = success;

this.errorCode = success ? ResultCode.SUCCESS.getCode():(resultCode == null ? ResultCode.COMMON_FAIL.getCode():resultCode.getCode());

this.errorMsg = success ? ResultCode.SUCCESS.getMessage():(resultCode == null ? ResultCode.COMMON_FAIL.getMessage():resultCode.getMessage());

}

public JsonResult(Boolean success,T data) {

this.success = success;

this.errorCode = success ? ResultCode.SUCCESS.getCode():ResultCode.COMMON_FAIL.getCode();

this.errorMsg = success ? ResultCode.SUCCESS.getMessage() : ResultCode.COMMON_FAIL.getMessage();

this.data = data;

}

public JsonResult(Boolean success,ResultCode resultCode,T data) {

this.success = success;

this.errorCode = success ? ResultCode.SUCCESS.getCode():(resultCode == null ? ResultCode.COMMON_FAIL.getCode():resultCode.getCode());

this.errorMsg = success ? ResultCode.SUCCESS.getMessage():(resultCode == null ? ResultCode.COMMON_FAIL.getMessage():resultCode.getMessage());

this.data = data;

}

public Boolean getSuccess() {

return success;

}

public void setSuccess(Boolean success) {

this.success = success;

}

public Integer getErrorCode() {

return errorCode;

}

public void setErrorCode(Integer errorCode) {

this.errorCode = errorCode;

}

public String getErrorMsg() {

return errorMsg;

}

public void setErrorMsg(String errorMsg) {

this.errorMsg = errorMsg;

}

public T getData() {

return data;

}

public void setData(T data) {

this.data = data;

}

20、然后在utils中新建一个ResultTool，如下代码所示：

package com.best.common.utils;

import com.best.common.entity.JsonResult;

import com.best.common.enums.ResultCode;

/**

* @author:sunxj

* @date:2020-11-10 22:11:03

* @description:json返回构造工具

public class ResultTool {

public static JsonResult success() {

return new JsonResult(true);

}

public static JsonResult success(T data) {

return new JsonResult<>(true,data);

}

public static JsonResult fail() {

return new JsonResult(false);

}

public static JsonResult fail(ResultCode resultCode) {

return new JsonResult(false,resultCode);

}

21、创建好这些之后，那么就可以开始在controller中进行构造了，controller如下：

package com.best.http://controller;

import com.best.common.entity.JsonResult;

import com.best.common.utils.ResultTool;

import com.best.entity.User;

import com.best.service.IUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.util.List;

/**

* @author:sunxj

* @date:2020-11-10 21:38:09

* @description:

@RestController//使用此注解，那么该类下的所有返回都是以json方式返回

@RequestMapping(value="best")//加上value后，在url访问时必须加上/best才行

public class UserController {

@Autowired

private IUserService userService;

@RequestMapping("/getUser")

public JsonResult getUser(HttpServletRequest request, HttpServletResponse response) {

List users = userService.selectAll();

return ResultTool.success(users);

}

22、重新启动springboot，然后输入：http://localhost:8080/best/getUser，此时页面会出现如下错误：

23、后台显示如下错误：

package com.best.controller;

import com.best.common.entity.JsonResult;

import com.best.common.utils.ResultTool;

import com.best.entity.User;

import com.best.service.IUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.util.List;

/**

* @author:sunxj

* @date:2020-11-10 21:38:09

* @description:

@RestController//使用此注解，那么该类下的所有返回都是以json方式返回

@RequestMapping(value="best")//加上value后，在url访问时必须加上/best才行

public class UserController {

@Autowired

private IUserService userService;

@RequestMapping("/getUser")

public JsonResult getUser(HttpServletRequest request, HttpServletResponse response) {

List users = userService.selectAll();

return ResultTool.success(users);

}

23、这意思就是没有找到UserMapper接口文件中的selectAll方法，也就是没有和*Mapper.xml匹配成功，这是由于我们将.xml文件和java文件放在了java目录，而通过maven来管理，它不会将java文件中的xml文件打包进去的，因此需要再pom中的build中指定，如：

2020-11-10 22:15:10.487 ERROR 12992 --- [nio-8080-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.best.dao.UserMapper.selectAll] with root cause

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.best.dao.UserMapper.selectAll

at org.apache.ibatis.binding.MapperMethod$SqlCommand.(MapperMethod.java:235) ~[mybatis-3.5.5.jar:3.5.5]

at org.apache.ibatis.binding.MapperMethod.(MapperMethod.java:53) ~[mybatis-3.5.5.jar:3.5.5]

at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:115) ~[mybatis-3.5.5.jar:3.5.5]

at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_261]

at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:102) ~[mybatis-3.5.5.jar:3.5.5]

at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85) ~[mybatis-3.5.5.jar:3.5.5]

at com.sun.proxy.$Proxy57.selectAll(Unknown Source) ~[na:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_261]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_261]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_261]

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at com.sun.proxy.$Proxy58.selectAll(Unknown Source) ~[na:na]

at com.best.service.impl.UserServiceImpl.selectAll(UserServiceImpl.java:22) ~[classes/:na]

at com.best.controller.UserController.getUser(UserController.java:26) ~[classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_261]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_261]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_261]

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.39.jar:4.0.FR]

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.10.RELEASE.jar:5.2.10.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.39.jar:4.0.FR]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.39.jar:9.0.39]