我收到 ClassCastException: WrappedPreparedStatementJDK8 cannot be cast to SQLServerPreparedStatement
I'm getting ClassCastException: WrappedPreparedStatementJDK8 cannot be cast to SQLServerPreparedStatement
我的环境：Eclipse IDE 企业版 Java 开发人员，版本：2019-09 R (4.13.0)
服务器：WildFly 13.0.0.Final
我正在尝试将数据批量上传到 Sql 服务器，下面的代码在我的相同版本的 WildFly 服务器中完美运行，但在具有相同 Wildfly 服务器且 java.lang.ClassCastException: org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8 无法在下面的语句中转换为 com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement:
SQLServerPreparedStatement pStmt = (SQLServerPreparedStatement) con.prepareStatement(execStoredProc);
完整代码如下：
import com.microsoft.sqlserver.jdbc.SQLServerDataTable;
import com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement;
import java.sql.*;
import java.util.ArrayList;
public class DatabaseExtended extends Database {
public DatabaseExtended(String assetDisposition, String assetDisposition_ds) {
super(assetDisposition, assetDisposition_ds);
// TODO Auto-generated constructor stub
}
public Object executeEstimateStructured(int iClientID, SQLServerDataTable sourceDataTable) {
//boolean rs = false;
ArrayList<String[]> lst = new ArrayList<String[]>();
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = DriverManager.getConnection(super.connectionUrl);
Statement stmt = con.createStatement();
String execStoredProc = "EXEC UploadEstimate ?,?";
SQLServerPreparedStatement pStmt = (SQLServerPreparedStatement) con.prepareStatement(execStoredProc);//<--Exception here
pStmt.setInt(1, iClientID);
pStmt.setStructured(2, "dbo.UT_Estimate", sourceDataTable);
ResultSet rs = pStmt.executeQuery();
int columnCount = rs.getMetaData().getColumnCount();
while (rs.next()) {
int i = 1;
String[] cols = new String[columnCount];
while (i <= columnCount) {
cols[i - 1] = rs.getString(i++);
}
lst.add(cols);
}
con.close();
}
catch (SQLException e) {
e.printStackTrace();
}
return lst;
}
}
在谷歌搜索这个异常时，我遇到了这个 link，它讨论了将 jboss-deployment-structure.xml 文件放在 WEB-INF 文件夹中，并提到了依赖项。下面是我的 jboss-部署-structure.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
<deployment>
<dependencies>
<module name="org.jboss.ironjacamar.jdbcadapters" slot="main"/>
<module name="com.microsoft.sqlserver" slot="main"/>
</dependencies>
</deployment>
</jboss-deployment-structure>
我在构建路径和部署结构中引用了 mssql-jdbc-7.4.1.jre8.jar 文件，以便将依赖项添加到 web-inf/lib 文件夹下.
现在，将 jboss-deployment-structure.xml 文件放入 web-inf 文件夹并部署 war 文件后，出现以下异常。我不确定我的 jboss-deployment-structure.xml 是否正确以及它是否放置在正确的文件夹中。你能帮忙吗？
ERROR [io.undertow.request] (default task-5) UT005023: Exception handling request to /AD/control/UploadEstimates: java.lang.IllegalAccessError: tried to access class com.microsoft.sqlserver.jdbc.Util from class com.microsoft.sqlserver.jdbc.SQLServerDataTable
at com.microsoft.sqlserver.jdbc.SQLServerDataTable.addColumnMetadata(SQLServerDataTable.java:83)
at com.MyClient.AD.util.UploadEstimateUT.start(UploadEstimateUT.java:66)
at com.MyClient.AD.util.UploadEstimates.doPost(UploadEstimates.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletChain.handleRequest(ServletChain.java:68)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create[=13=](SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access[=13=]0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:830)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
at java.lang.Thread.run(Thread.java:748)
2020 年 3 月 16 日更新
这是我使用批处理语句更新的代码：
public String executeInboundEstimateBatchedStoredProc(int iClientID, SQLServerDataTable sourceDataTable) {
String message="";
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = super.getConnection();
String execStoredProc = "EXEC UploadEstimate ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?";
PreparedStatement pStmt = con.prepareStatement(execStoredProc);
Iterator<Entry<Integer, Object[]>> itr1 = sourceDataTable.getIterator();
while (itr1.hasNext()) {
Object[] lst= itr1.next().getValue();
int numColumns = lst.length;
pStmt.setInt(1, iClientID);
for (int i = 0; i < numColumns; i++) {
pStmt.setString(i+2, lst[i].toString());
}
// add single insert query
pStmt.addBatch();
}
// Execute batch
int[] counts = pStmt.executeBatch();
if (pStmt != null) {
pStmt.close();
}
if (con != null) {
con.close();
}
}
// Handle any errors that may have occurred.
catch (SQLException | ClassNotFoundException e) {
e.printStackTrace();
message=e.getMessage();
}
return message;
}
那是因为您不应强制转换 PreparedStatement，而应使用 unwrap。
con.prepareStatement(execStoredProc).unwrap(SQLServerPreparedStatement.class);
你永远不必检查连接对象的准备语句的 return 类型。依赖于平台的底层驱动程序可以提供他们自己的准备语句接口的实现，这与用户无关。你应该只使用接口提供的 public 方法，而不是进一步挖掘。在你的情况下，你没有错误只是将你的语句转换为通用类型。 PreparedStatement pStm=con.prepareStatememt(execStoredProc) 如果你处理的是我从你的 execStoredProc 假设的过程，那么使用 con.prepareCall() 并存储在 Callable Statement 类型
中
我的环境：Eclipse IDE 企业版 Java 开发人员，版本：2019-09 R (4.13.0)
服务器：WildFly 13.0.0.Final
我正在尝试将数据批量上传到 Sql 服务器，下面的代码在我的相同版本的 WildFly 服务器中完美运行，但在具有相同 Wildfly 服务器且 java.lang.ClassCastException: org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8 无法在下面的语句中转换为 com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement:
SQLServerPreparedStatement pStmt = (SQLServerPreparedStatement) con.prepareStatement(execStoredProc);
完整代码如下：
import com.microsoft.sqlserver.jdbc.SQLServerDataTable;
import com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement;
import java.sql.*;
import java.util.ArrayList;
public class DatabaseExtended extends Database {
public DatabaseExtended(String assetDisposition, String assetDisposition_ds) {
super(assetDisposition, assetDisposition_ds);
// TODO Auto-generated constructor stub
}
public Object executeEstimateStructured(int iClientID, SQLServerDataTable sourceDataTable) {
//boolean rs = false;
ArrayList<String[]> lst = new ArrayList<String[]>();
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = DriverManager.getConnection(super.connectionUrl);
Statement stmt = con.createStatement();
String execStoredProc = "EXEC UploadEstimate ?,?";
SQLServerPreparedStatement pStmt = (SQLServerPreparedStatement) con.prepareStatement(execStoredProc);//<--Exception here
pStmt.setInt(1, iClientID);
pStmt.setStructured(2, "dbo.UT_Estimate", sourceDataTable);
ResultSet rs = pStmt.executeQuery();
int columnCount = rs.getMetaData().getColumnCount();
while (rs.next()) {
int i = 1;
String[] cols = new String[columnCount];
while (i <= columnCount) {
cols[i - 1] = rs.getString(i++);
}
lst.add(cols);
}
con.close();
}
catch (SQLException e) {
e.printStackTrace();
}
return lst;
}
}
在谷歌搜索这个异常时，我遇到了这个 link，它讨论了将 jboss-deployment-structure.xml 文件放在 WEB-INF 文件夹中，并提到了依赖项。下面是我的 jboss-部署-structure.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
<deployment>
<dependencies>
<module name="org.jboss.ironjacamar.jdbcadapters" slot="main"/>
<module name="com.microsoft.sqlserver" slot="main"/>
</dependencies>
</deployment>
</jboss-deployment-structure>
我在构建路径和部署结构中引用了 mssql-jdbc-7.4.1.jre8.jar 文件，以便将依赖项添加到 web-inf/lib 文件夹下.
现在，将 jboss-deployment-structure.xml 文件放入 web-inf 文件夹并部署 war 文件后，出现以下异常。我不确定我的 jboss-deployment-structure.xml 是否正确以及它是否放置在正确的文件夹中。你能帮忙吗？
ERROR [io.undertow.request] (default task-5) UT005023: Exception handling request to /AD/control/UploadEstimates: java.lang.IllegalAccessError: tried to access class com.microsoft.sqlserver.jdbc.Util from class com.microsoft.sqlserver.jdbc.SQLServerDataTable
at com.microsoft.sqlserver.jdbc.SQLServerDataTable.addColumnMetadata(SQLServerDataTable.java:83)
at com.MyClient.AD.util.UploadEstimateUT.start(UploadEstimateUT.java:66)
at com.MyClient.AD.util.UploadEstimates.doPost(UploadEstimates.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletChain.handleRequest(ServletChain.java:68)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create[=13=](SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=13=](UndertowDeploymentInfoService.java:1514)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access[=13=]0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:830)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
at java.lang.Thread.run(Thread.java:748)
2020 年 3 月 16 日更新
这是我使用批处理语句更新的代码：
public String executeInboundEstimateBatchedStoredProc(int iClientID, SQLServerDataTable sourceDataTable) {
String message="";
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = super.getConnection();
String execStoredProc = "EXEC UploadEstimate ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?";
PreparedStatement pStmt = con.prepareStatement(execStoredProc);
Iterator<Entry<Integer, Object[]>> itr1 = sourceDataTable.getIterator();
while (itr1.hasNext()) {
Object[] lst= itr1.next().getValue();
int numColumns = lst.length;
pStmt.setInt(1, iClientID);
for (int i = 0; i < numColumns; i++) {
pStmt.setString(i+2, lst[i].toString());
}
// add single insert query
pStmt.addBatch();
}
// Execute batch
int[] counts = pStmt.executeBatch();
if (pStmt != null) {
pStmt.close();
}
if (con != null) {
con.close();
}
}
// Handle any errors that may have occurred.
catch (SQLException | ClassNotFoundException e) {
e.printStackTrace();
message=e.getMessage();
}
return message;
}
那是因为您不应强制转换 PreparedStatement，而应使用 unwrap。 con.prepareStatement(execStoredProc).unwrap(SQLServerPreparedStatement.class);
你永远不必检查连接对象的准备语句的 return 类型。依赖于平台的底层驱动程序可以提供他们自己的准备语句接口的实现，这与用户无关。你应该只使用接口提供的 public 方法，而不是进一步挖掘。在你的情况下，你没有错误只是将你的语句转换为通用类型。 PreparedStatement pStm=con.prepareStatememt(execStoredProc) 如果你处理的是我从你的 execStoredProc 假设的过程，那么使用 con.prepareCall() 并存储在 Callable Statement 类型
中