请帮我解决这个错误，我是新手，对于没有使用spring MVC web结构的测试数据源运行时出现的错误无法理解。
原始答案: Original Answer
cd F:\NetBeansProjects\SpringContactApp; "JAVA_HOME=C:\\Program Files\\Java\\jdk1.8.0_131" cmd /c "\"\"C:\\Program Files\\NetBeans 8.0.1\\java\\maven\\bin\\mvn.bat\" -Dexec.args=\"-classpath %classpath in.ezeon.capp.test.TestDataSource\" -Dexec.executable=java -Dexec.classpathScope=test -Dmaven.ext.class.path=\"C:\\Program Files\\NetBeans 8.0.1\\java\\maven-nblib\\netbeans-eventspy.jar\" -Dfile.encoding=UTF-8 org.codehaus.mojo:exec-maven-plugin:1.2.1:exec\""
Running NetBeans Compile On Save execution. Phase execution is skipped and output directories of dependency projects (with Compile on Save turned on) will be used instead of their jar artifacts.
Scanning for projects...
------------------------------------------------------------------------
Building SpringContactApp 1.0-SNAPSHOT
------------------------------------------------------------------------
--- exec-maven-plugin:1.2.1:exec (default-cli) @ SpringContactApp ---
Feb 04, 2019 12:15:40 PM org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@531d72ca: startup date [Mon Feb 04 12:15:40 IST 2019]; root of context hierarchy
Feb 04, 2019 12:15:40 PM org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor <init>
INFO: JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
Exception in thread "main" org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Could not create connection to database server. Attempted reconnect 3 times. Giving up.)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:619)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:870)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:931)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:941)
at in.ezeon.capp.test.TestDataSource.main(TestDataSource.java:23)
Caused by: java.sql.SQLException: Cannot create PoolableConnectionFactory (Could not create connection to database server. Attempted reconnect 3 times. Giving up.)
at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2294)
at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2039)
at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1533)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 5 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
以下代码是SpringRootConfig.java类和TestDataSource.java类，我使用的是NetBeans 8和Spring框架。"Original Answer"翻译成"最初的回答"。
package in.ezeon.capp.config;
import static java.lang.Boolean.TRUE;
import org.apache.commons.dbcp2.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
/**
*
* @author admin
*/
@Configuration
@ComponentScan(basePackages = {"in.ezeon.capp.dao"})
public class SpringRootConfig {
//TODO: Services,DAO,DataSource,Email sender or some other business layer beans
@Bean
public BasicDataSource getDataSource()
{
BasicDataSource ds=new BasicDataSource();
ds.setDriverClassName("com.mysql.jdbc.Driver");
//ds.setUrl("jdbc:mysql://localhost:3306/capp_db?useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true&failOverReadOnly=false");//localhost//127.0.0.1
ds.setUrl("jdbc:mysql://localhost:3306/capp_db");
ds.setUsername("root");
ds.setPassword("dbadmin@123");//dbadmin@123
ds.setMaxTotal(2);
ds.setInitialSize(1);
ds.setTestOnBorrow(true);
ds.setValidationQuery("SELECT 1");
ds.setDefaultAutoCommit(TRUE);
return ds;
}
}
以下是该错误的截图：
"Original Answer"翻译成中文为"最初的回答"。