Java项目使用SQLite数据库后无法启动的问题

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背景:

Java > maven 的 jar 项目

功能是记录用户的每天的按键次数

使用 jar2exe 工具将 jar 转为 exe 可执行文件

原本项目中使用的Mysql数据库,使用Mybatis工具操作运行没有问题

后来发现对于一个小工具来说,用Mysql太麻烦,因为需要安装配置Mysql等等.

于是我上网查了查,找到了一个轻量级的嵌入式数据库SQLite

导入一个 org.xerial > sqlite-jdbc jar 包,直接就可以创建数据库文件了十分方便

当时用的 jar 是最新的版本 3.20.0

费了一天的劲,将之前的持久层代码从Mysql替换成了SQLite

问题介绍:

在编辑器内运行良好

编译成 jar 后,使用 java -jar ***.jar 运行良好

当我把 jar 用 jar2exe 转成 exe 运行文件后, 它就报错了

错误信息如下:

java.sql.SQLException: Error opening connection
at org.sqlite.core.CoreConnection.open(CoreConnection.java:215)
at org.sqlite.core.CoreConnection.<init>(CoreConnection.java:76)
at org.sqlite.jdbc3.JDBC3Connection.<init>(JDBC3Connection.java:26)
at org.sqlite.jdbc4.JDBC4Connection.<init>(JDBC4Connection.java:24)
at org.sqlite.SQLiteConnection.<init>(SQLiteConnection.java:45)
at org.sqlite.JDBC.createConnection(JDBC.java:114)
at org.sqlite.JDBC.connect(JDBC.java:88)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:119)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:143)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:132)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.initializeAutomaticTestTable(C3P0PooledConnectionPoolManager.java:772)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.createPooledConnectionPool(C3P0PooledConnectionPoolManager.java:696)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.getPool(C3P0PooledConnectionPoolManager.java:257)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.getPool(C3P0PooledConnectionPoolManager.java:271)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
at com.play.util.SQLiteUtil.openConnection(SQLiteUtil.java:56)
at com.play.base.BaseDaoImpl.execute(BaseDaoImpl.java:54)
at com.play.dao.impl.KeyRecordDayDaoImpl.add(KeyRecordDayDaoImpl.java:22)
at com.play.DataManager.addToDayRecord(DataManager.java:75)
at com.play.DataManager.addBeat(DataManager.java:58)
at com.play.DataManager.lambda$new$0(DataManager.java:32)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at org.sqlite.SQLiteJDBCLoader.loadSQLiteNativeLibrary(SQLiteJDBCLoader.java:315)
at org.sqlite.SQLiteJDBCLoader.initialize(SQLiteJDBCLoader.java:64)
at org.sqlite.core.NativeDB.load(NativeDB.java:56)
at org.sqlite.core.CoreConnection.open(CoreConnection.java:211)
... 21 more