为啥“prepareCall”会抛出 NumberFormatException？
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【中文标题】为啥“prepareCall”会抛出 NumberFormatException？【英文标题】：Why does "prepareCall" throw a NumberFormatException?为什么“prepareCall”会抛出 NumberFormatException？ 【发布时间】：2021-04-09 10:28:44 【问题描述】：我正在用 Java 编写一个需要与数据库交互的软件（本地主机上的 mysql Workbench）。在我的 DAO 类中，我检索了一个全局数据库连接，如果它还没有打开，它将被打开。当我的程序调用“prepareCall”时，会抛出 NumberFormatException。这仅在某些（大多数）查询中发生，而在其他查询中不会发生，即使代码没有更改。
我还想指出，查询在工作台中执行良好。
DAO
public static User selectPersonalInfo(Integer id) throws SQLException
CallableStatement stmt = null;
ResultSet res = null;
User user = null;
try
Connection conn = ConnectionManager.getConnection();
stmt = conn.prepareCall(RoutinesIdentifier.GET_USER);
res = RoutinesManager.bindParametersAndExec(stmt, id);
if (res.first())
user = new User(res.getString("email"), res.getString("pwd"), res.getString("first_name"), res.getString("last_name"));
user.setCity(res.getString("city"));
user.setBirth(res.getDate("birth").toInstant().atZone(ZoneId.systemDefault()).toLocalDate());
res.close();
catch (SQLException e)
throw new SQLException("An error occured while trying to retrieve personal information.");
catch(NumberFormatException ne)
ne.printStackTrace();
System.exit(0);
finally
if(stmt != null)
stmt.close();
return user;
连接
public static Connection getConnection() throws SQLException
if (conn == null)
conn = DriverManager.getConnection(url, user, pass);
return conn;
例程标识符
public static final String GET_USER = "call wwj_db.retrieve_user(?);";
例程管理器
public static ResultSet bindParametersAndExec(CallableStatement stmt, int ... params) throws SQLException
for (int i = 0; i < params.length; i++)
stmt.setInt(i+1, params[i]);
return executeStmt(stmt);
public static ResultSet executeStmt(CallableStatement stmt) throws SQLException
if(stmt.execute())
return stmt.getResultSet();
else
return null;
MySQL
CREATE PROCEDURE `retrieve_user` (in var_id int)
BEGIN
SELECT `user`.email, `user`.pwd, `user`.first_name, `user`.last_name, `user`.city, `user`.birth
FROM `account` join `user` on `account`.user = `user`.email
WHERE `account`.id = var_id;
END
堆栈跟踪
java.lang.NumberFormatException: Invalid integer format for value 'PRIMARY'
at com.mysql.cj.protocol.a.MysqlTextValueDecoder.getLong(MysqlTextValueDecoder.java:223)
at com.mysql.cj.protocol.a.MysqlTextValueDecoder.getInt(MysqlTextValueDecoder.java:152)
at com.mysql.cj.protocol.a.MysqlTextValueDecoder.decodeInt2(MysqlTextValueDecoder.java:97)
at com.mysql.cj.protocol.result.AbstractResultsetRow.decodeAndCreateReturnValue(AbstractResultsetRow.java:153)
at com.mysql.cj.protocol.result.AbstractResultsetRow.getValueFromBytes(AbstractResultsetRow.java:241)
at com.mysql.cj.protocol.a.result.ByteArrayRow.getValue(ByteArrayRow.java:91)
at com.mysql.cj.jdbc.result.ResultSetImpl.getObject(ResultSetImpl.java:1296)
at com.mysql.cj.jdbc.result.ResultSetImpl.getInt(ResultSetImpl.java:797)
at com.mysql.cj.jdbc.CallableStatement$CallableStatementParamInfo.addParametersFromDBMD(CallableStatement.java:254)
at com.mysql.cj.jdbc.CallableStatement$CallableStatementParamInfo.<init>(CallableStatement.java:206)
at com.mysql.cj.jdbc.CallableStatement.convertGetProcedureColumnsToInternalDescriptors(CallableStatement.java:831)
at com.mysql.cj.jdbc.CallableStatement.determineParameterTypes(CallableStatement.java:805)
at com.mysql.cj.jdbc.CallableStatement.<init>(CallableStatement.java:586)
at com.mysql.cj.jdbc.CallableStatement.getInstance(CallableStatement.java:485)
at com.mysql.cj.jdbc.ConnectionImpl.parseCallableStatement(ConnectionImpl.java:1516)
at com.mysql.cj.jdbc.ConnectionImpl.prepareCall(ConnectionImpl.java:1541)
at com.mysql.cj.jdbc.ConnectionImpl.prepareCall(ConnectionImpl.java:1532)
at logic.persistence.dao.UserDAO.selectPersonalInfo(UserDAO.java:27)
at logic.domain.User.getPersonalInfoFromDB(User.java:85)
at logic.application.control.AccountControl.retrievePersonalInfo(AccountControl.java:72)
at logic.bean.UserBean.getPersonalInfo(UserBean.java:103)
at logic.presentation.control.PersonalInfoGraphic.initialize(PersonalInfoGraphic.java:78)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at logic.presentation.GraphicHandler.switchScreen(GraphicHandler.java:106)
at logic.presentation.GraphicHandler.openSection(GraphicHandler.java:119)
at logic.presentation.control.AccountGraphic.openPersonalInfo(AccountGraphic.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1771)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8411)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:432)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:410)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:187)
at java.lang.Thread.run(Thread.java:748)
【问题讨论】：
帮助我们帮助您 - 分享此类失败呼叫的代码 您使用的是哪个版本的 MySQL Connector/J 和 MySQL 服务器？乍一看，这似乎是驱动程序中的错误（或者可能是服务器中的错误）。 @MarkRotteveel 我使用的是 8.0.22 版 【参考方案1】：看起来数据库中的“PRIMARY”数据类型不是 INT 格式。因此，无论数据库中有什么，请在 Java 代码中使用相应的数据类型。
【讨论】：
没那么简单，问题在于 MySQL Connector/J 内部试图读取数据库元数据以准备调用。 @MarkRotteveel 就是这样！太感谢了。我更改了服务器和连接器版本，一切正常。以上是关于为啥“prepareCall”会抛出 NumberFormatException？的主要内容，如果未能解决你的问题，请参考以下文章
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