com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:SQL语法错误 [英] com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: error in SQL syntax

问题描述

如果我运行主类，则会收到此错误:

If I run my main class, I get this error:

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'insert into customerLogin(companyName,username,password) values('Big Company','D' at line 1
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.Util.getInstance(Util.java:386)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)
    at dao.CustomerContactDAO.performUpdate(CustomerContactDAO.java:175)
    at dao.DAOTemplate.executeUpdate(DAOTemplate.java:27)
    at dao.CustomerContactDAO.addCustomerContact(CustomerContactDAO.java:88)
    at test.Test.main(Test.java:29)

这是我DAO中的代码.我认为错误出在这些代码行中，但我不知道它是哪一行:

This is the code in my DAO. I think the error is in these lines of code but I don't know which one it is:

public boolean addCustomerContact(CustomerContact c) {
    setQuery("insert into customerContact(companyName,lastName,firstName,email,telNum,local,cellNum) values(?,?,?,?,?,?,?);"
            + "insert into customerLogin(companyName,username,password) values(?,?,?)");
    queries.add(getQuery());

    KeyValuePair onePair;

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getCompanyName());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getLastName());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getFirstName());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getEmail());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.INT);
    onePair.setValue(c.getTelNum() + "");
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.INT);
    onePair.setValue(c.getLocal() + "");
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getCellNum() + "");
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getCompanyName());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getUsername());
    getParameters().add(onePair);

    onePair = new KeyValuePair();
    onePair.setKey(KeyValuePair.STRING);
    onePair.setValue(c.getPassword());
    getParameters().add(onePair);
    return executeUpdate();
}

推荐答案

您正试图一次执行两个查询. JDBC不允许这样做.单个执行应该是一个且只有一个语句.有些驱动程序确实允许它，但是您需要使用连接属性来启用它，例如对于MySQL，它是allowMultiQueries，请参见

You are trying to execute two queries in one execution. That is not allowed by JDBC. A single execution should be one and only one statement. Some drivers do allow it, but then you need to enable that with a connection property, for example for MySQL it is allowMultiQueries, see http://dev.mysql.com/doc/refman/5.6/en/connector-j-reference-configuration-properties.html:

allowMultiQueries
允许使用;"在一个语句(真/假)期间分隔多个查询，默认为假"，并且不影响依赖于rewriteBatchStatements的addBatch()和executeBatch()方法.

allowMultiQueries
Allow the use of ';' to delimit multiple queries during one statement (true/false), defaults to 'false', and does not affect the addBatch() and executeBatch() methods, which instead rely on rewriteBatchStatements.

但是，我强烈建议作为两个单独的语句执行(可选地在事务中执行).那是JDBC兼容的，并且可以在所有数据库上使用.

However I'd strongly suggest to execute as two separate statements (optionally in a transaction). That is JDBC compliant and will work on all databases.

这篇关于com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:SQL语法错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！