更新：我更新了mysql连接器的版本，现在遇到一个新错误。

因此，大多数此类迁移通常是从WLS迁移到Tomcat。但是默认情况下，我的项目一直在使用Tomcat。我的前端是Angular，它在端口4200上运行。我在tomcat上的后端在8080上运行，并且所有功能均正常。现在，我正在尝试将此应用程序部署到我的weblogic Server中。

我现在收到此错误： 我尝试使用Connect Java to a MySQL database，ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long on connect to MySQL

org.springframework.jdbc.support.MetaDataaccessException: Could not get Connection for extracting meta-data; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long

这是我的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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.14.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.health.doh</groupId>
    <artifactId>timeoff</artifactId>
    <version>0.0.1-snAPSHOT</version>
    <name>timeoff</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.1.RELEASE</version>
</dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
            <version>8.0.18</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>tomcat-embed-el</artifactId>
                    <groupId>org.apache.tomcat.embed</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>tomcat-embed-core</artifactId>
                    <groupId>org.apache.tomcat.embed</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>tomcat-embed-websocket</artifactId>
                    <groupId>org.apache.tomcat.embed</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <configuration>
                    <failOnmissingWebXml>false</failOnmissingWebXml>
                    <archive>
                        <manifest>
                            <addDefaultImplementationEntries>false</addDefaultImplementationEntries>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/requester
spring.datasource.username=root
spring.datasource.password=xxx
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=create
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect

TimeoffApplication.java

@ComponentScan 
@SpringBootApplication
public class TimeoffApplication extends SpringBootServletInitializer implements WebApplicationInitializer{

    @Autowired
    EmployeeRequestDao employeeRequestDao;
    public static void main(String[] args) {
        SpringApplication.run(TimeoffApplication.class,args);
    }

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

Controller.java中的代码段

@RestController
@RequestMapping("api")
@CrossOrigin(origins = "http://localhost:4200",allowedHeaders = "*")