Java JDBC，MySQL-PreparedStatement executeUpdate出现DML错误_Java_Mysql_Jdbc

Java JDBC，MySQL-PreparedStatement executeUpdate出现DML错误

java mysql jdbc

Java JDBC，MySQL-PreparedStatement executeUpdate出现DML错误,java,mysql,jdbc,Java,Mysql,Jdbc,我有两张桌子。我需要根据col2从第二个表中获取列表中的一些列值，并在循环中动态更新第一个表中的列值代码： int ownerUpdateCount = 0; PreparedStatement statement = null; Connection connection = null; try{ while(featuresIT.hasNext()){ String feature = (String) featuresIT.

我有两张桌子。我需要根据col2从第二个表中获取列表中的一些列值，并在循环中动态更新第一个表中的列值

代码：

int ownerUpdateCount = 0;
    PreparedStatement statement = null;
    Connection connection = null;
    try{
        while(featuresIT.hasNext()){
            String feature = (String) featuresIT.next();

            String updateOwnerQuery = "UPDATE `regression_reports` "
                    + "JOIN `feature_testbed_owner_mapping_628` ON (`regression_reports`.Feature='"
                    + feature
                    + "' AND `regression_reports`.Feature = `feature_testbed_owner_mapping_628`.feature_as_on_webpage) "
                    + "SET `regression_reports`.Owner = `feature_testbed_owner_mapping_628`.owner";
            //logger.debug("\n updateOwnerQuery : " + updateOwnerQuery);
            connection = dataSource.getConnection();
            connection.setAutoCommit(true);
            statement = connection.prepareStatement(updateOwnerQuery);
            //ownerUpdateCount += 
            ownerUpdateCount = statement.executeUpdate();
            System.out.println(feature + " ownerUpdateCount : " + ownerUpdateCount);
        }
        logger.debug("\n ownerUpdateCount : " + ownerUpdateCount);
    } catch (SQLException e) {
        e.printStackTrace();
    } finally {
           try { if(null!=statement)statement.close();} catch (SQLException e) 
           {e.printStackTrace();}
           try { if(null!=connection)connection.close();} catch (SQLException e) 
           {e.printStackTrace();}
    }

错误：

int ownerUpdateCount = 0;
    PreparedStatement statement = null;
    Connection connection = null;
    try{
        while(featuresIT.hasNext()){
            String feature = (String) featuresIT.next();

            String updateOwnerQuery = "UPDATE `regression_reports` "
                    + "JOIN `feature_testbed_owner_mapping_628` ON (`regression_reports`.Feature='"
                    + feature
                    + "' AND `regression_reports`.Feature = `feature_testbed_owner_mapping_628`.feature_as_on_webpage) "
                    + "SET `regression_reports`.Owner = `feature_testbed_owner_mapping_628`.owner";
            //logger.debug("\n updateOwnerQuery : " + updateOwnerQuery);
            connection = dataSource.getConnection();
            connection.setAutoCommit(true);
            statement = connection.prepareStatement(updateOwnerQuery);
            //ownerUpdateCount += 
            ownerUpdateCount = statement.executeUpdate();
            System.out.println(feature + " ownerUpdateCount : " + ownerUpdateCount);
        }
        logger.debug("\n ownerUpdateCount : " + ownerUpdateCount);
    } catch (SQLException e) {
        e.printStackTrace();
    } finally {
           try { if(null!=statement)statement.close();} catch (SQLException e) 
           {e.printStackTrace();}
           try { if(null!=connection)connection.close();} catch (SQLException e) 
           {e.printStackTrace();}
    }

java.sql.SQLException:无法使用executeQuery（）发出数据操作语句。位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1078）位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:989）位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:975）位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:920）位于com.mysql.jdbc.StatementImpl.checkForDml（StatementImpl.java:499）在com.mysql.jdbc.StatementImpl.executeQuery（StatementImpl.java:1518）位于org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeQuery（DelegatingStatement.java:208）位于org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeQuery（DelegatingStatement.java:208）位于com.n7k.regression.RegressionDAO.updateRegReportsDB（RegressionDAO.java:71）位于com.n7k.regression.RegressionServlet.doPost（RegressionServlet.java:63）

此错误仅在循环的第一次迭代中发生。任何关于调试其发生原因的建议

String updateFeaturesQuery = "INSERT INTO `regression_reports` "
                    + "(Feature, `Report`, `P`, `F`, `Remarks`) VALUES ('"
                    + feature + "','" + report + "'," + pass + "," + fail
                    + ") " + "ON DUPLICATE KEY UPDATE `Report` = '"
                    + report + "', `P` = " + pass + ", `F`= " + fail
                    + ", `Remarks` = " + remarks + ";";

       connection = dataSource.getConnection();
       statement = connection.prepareStatement(updateFeaturesQuery);

       Line#73 
       featureUpdateCount = statement.executeUpdate(updateFeaturesQuery);

错误：

int ownerUpdateCount = 0;
    PreparedStatement statement = null;
    Connection connection = null;
    try{
        while(featuresIT.hasNext()){
            String feature = (String) featuresIT.next();

            String updateOwnerQuery = "UPDATE `regression_reports` "
                    + "JOIN `feature_testbed_owner_mapping_628` ON (`regression_reports`.Feature='"
                    + feature
                    + "' AND `regression_reports`.Feature = `feature_testbed_owner_mapping_628`.feature_as_on_webpage) "
                    + "SET `regression_reports`.Owner = `feature_testbed_owner_mapping_628`.owner";
            //logger.debug("\n updateOwnerQuery : " + updateOwnerQuery);
            connection = dataSource.getConnection();
            connection.setAutoCommit(true);
            statement = connection.prepareStatement(updateOwnerQuery);
            //ownerUpdateCount += 
            ownerUpdateCount = statement.executeUpdate();
            System.out.println(feature + " ownerUpdateCount : " + ownerUpdateCount);
        }
        logger.debug("\n ownerUpdateCount : " + ownerUpdateCount);
    } catch (SQLException e) {
        e.printStackTrace();
    } finally {
           try { if(null!=statement)statement.close();} catch (SQLException e) 
           {e.printStackTrace();}
           try { if(null!=connection)connection.close();} catch (SQLException e) 
           {e.printStackTrace();}
    }

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：您的SQL语法有错误；请查看与MySQL服务器版本对应的手册，以获取第1行“”附近要使用的正确语法位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）位于sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:39）在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:27）位于java.lang.reflect.Constructor.newInstance（Constructor.java:513）位于com.mysql.jdbc.Util.HandleneInstance（Util.java:411）位于com.mysql.jdbc.Util.getInstance（Util.java:386）位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1054）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:4190）上在com.mysql.jdbc.MysqlIO.checkErrorPacket上（MysqlIO.java:4122）位于com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:2570）位于com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2731）位于com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2812）位于com.mysql.jdbc.StatementImpl.executeUpdate（StatementImpl.java:1811）位于com.mysql.jdbc.StatementImpl.executeUpdate（StatementImpl.java:1725）位于org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeUpdate（DelegatingStatement.java:228）位于org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeUpdate（DelegatingStatement.java:228）位于com.n7k.regression.RegressionDAO.updateRegReportsDB（RegressionDAO.java:73）

上面的执行给出了这个错误。手动执行相同的查询不会给我带来任何错误。

您的专栏

备注

在此完全缺失

// No `Remarks` even though you included it in the list. `F`, `Remarks`)
 "," + fail /* + Remarks! */ + ") " + "ON DUPLICATE KEY UPDATE `Report` = '"

您的列

备注

不会在此处转义

+ ", `Remarks` = '" + remarks + "';";

但是您应该使用or，因为您的代码易受攻击。

是第二个问题-您在五列中插入了四个值。你忘了 “备注”

您是第一个问题-您没有向我们展示正确的代码。

您在sql查询中犯了一些错误，比如

并且您缺少像这样获取的值
备注

  STRING updateFeaturesQuery = 
                 "INSERT INTO `regression_reports` "

                + "(Feature,      `Report`,        `P`,         `F`, `Remarks`) 
                VALUES 
                ('"
                + feature + "','"+report +"',"+ pass +","+ fail+",/*"+ Remarks+"*/ 
                + ") " + 

                "ON DUPLICATE KEY UPDATE 
                `Report` = '"+ report + "',
                 `P` = " + pass + ", 
                `F`= " + fail+ ", 
                `Remarks` = " + remarks + "/*;*/";

请发布您的整个异常。这是您正在运行的实际代码吗while（it.hasNext）{
在我看来很奇怪。请发布您的实际代码。String feature=（String）featuresIT.next（）；/@DavidWallace我正在转换为String。我只是引用它作为示例代码。我将发布原始代码。@DavidWallace使用PreparedStatement，但将常量推入查询中（这将使语句缓存无效）还有更糟糕的漏洞。我刚刚通过打印查询语句注意到了。感谢您指出这一点。我将按照您的建议制定编码标准。感谢您的建议。我包含了整个代码。请您刷新并检查。我相信在解决第一个问题后它将正确执行。我忽略了错误是的，我在发布此答案之前阅读了您的代码。谢谢。您可以看出，因为我的答案是指您最近的编辑，而不是您发布的原始代码。