Question

如果我运行我的主类，我会收到此错误：

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。我认为错误在于这些代码行，但我不知道它是哪一行：

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();
}

Answer 1

您尝试在一次执行中执行两个查询。 JDBC不允许这样做。单个执行应该是一个且只有一个语句。有些驱动程序允许它，但是你需要使用连接属性启用它，例如对于MySQL allowMultiQueries，请参阅http://dev.mysql.com/doc/refman/5.6/en/connector-j-reference-configuration-properties.html：

allowMultiQueries
允许使用';'在一个语句中分隔多个查询（true / false），默认为'false'，并且不影响addBatch（）和executeBatch（）方法，而是依赖rewriteBatchStatements。

但是我强烈建议执行两个单独的语句（可选地在事务中）。这符合JDBC标准，适用于所有数据库。

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：SQL语法错误

1 个答案: