t2556616883的博客

1，在pom.xml中更改maven版本<properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target></properties>2，在IntelliJ IDEA中重新导入所有Maven项目Shift + ctrl + A 查找Reimport Al

**java.sql.SQLException: No database selected** at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914) at com.mysql.jd

idea startup.bat一闪而退解决方法 The JRE_HOME environment variable is not defined correctly This environment variable is needed to run this program 新的问题为解决 求解答一闪而退startup.bat文件编辑在最后的end后面加pauseThe JRE_HOME environment variable is not defined correctly This envi