1.org.hibernate.MappingException: No Dialect mapping for JDBC type: -9

org.hibernate.MappingException: No Dialect mapping for JDBC type: -9

原因：Hibernate框架的方言（Dialect ）没有数据库中数据类型nvarchar的映射，只有varchar类型的映射。所以在启动时出现此异常。

解决方法：

方法一：

将数据库字段的nvarchar类型改为varchar类型。

方法二：

为了指定更加明确的返回值类型，我们可以使用addScalar()方法：

session.createSQLQuery("select * from person_inf")  

.addScalar("name",StandardBasicTypes.STRING)  

.addScalar("age",StandardBasicTypes.INT)  

.list();

方法三：

org.hibernate.MappingException: No Dialect mapping for JDBC type: -9

org.hibernate.MappingException: No Dialect mapping for JDBC type: -15

笔者在做连接SQLServer2008数据库的时候遇到了上述的错误，解决办法如下：

package com.shihuan.core.framework.extend;

import java.sql.Types;

import org.hibernate.Hibernate;

import org.hibernate.dialect.SQLServer2008Dialect;

public class SqlServer2008Dialect extends SQLServer2008Dialect {

    public SqlServer2008Dialect() {  

        super();  

        registerHibernateType(Types.CHAR, Hibernate.STRING.getName());

        registerHibernateType(Types.NCHAR, Hibernate.STRING.getName());

        registerHibernateType(Types.NVARCHAR, Hibernate.STRING.getName());  

        registerHibernateType(Types.LONGNVARCHAR, Hibernate.STRING.getName());  

        registerHibernateType(Types.DECIMAL, Hibernate.DOUBLE.getName());  

    }

}

java.sql.Types对应的值请参考http://blog.sina.com.cn/s/blog_4f925fc30102ep0v.html

java.sql.Types对应的sql server2008中的一些值：

public final static int BIT   =  -7;

public final static int TINYINT  =  -6;

public final static int SMALLINT =   5;

public final static int INTEGER  =   4;

public final static int BIGINT   =  -5;

public final static int FLOAT   =   6;

public final static int REAL   =   7;

public final static int DOUBLE   =   8;

public final static int NUMERIC  =   2;

public final static int DECIMAL  =   3;

public final static int CHAR  =   1;

public final static int VARCHAR  =  12;

public final static int LONGVARCHAR  =  -1;

public final static int DATE   =  91;

public final static int TIME   =  92;

public final static int TIMESTAMP  =  93;

public final static int BINARY  =  -2;

public final static int VARBINARY  =  -3;

public final static int LONGVARBINARY  =  -4;

public final static int NULL  =   0;

public final static int OTHER  = 1111;

public final static int JAVA_OBJECT         = 2000;

public final static int DISTINCT            = 2001;

public final static int STRUCT              = 2002;

public final static int ARRAY               = 2003;

public final static int BLOB                = 2004;

public final static int CLOB                = 2005;

public final static int REF                 = 2006;

public final static int DATALINK = 70;

public final static int BOOLEAN = 16;

public final static int ROWID = -8;

public static final int NCHAR = -15;

public static final int NVARCHAR = -9;

public static final int LONGNVARCHAR = -16;

public static final int NCLOB = 2011;

public static final int SQLXML = 2009;

Hibernate SQL方言（hibernate.dialect）:

RDBMS	Dialect
DB2	org.hibernate.dialect.DB2Dialect
DB2 AS/400	org.hibernate.dialect.DB2400Dialect
DB2 OS390	org.hibernate.dialect.DB2390Dialect
PostgreSQL	org.hibernate.dialect.PostgreSQLDialect
MySQL5	org.hibernate.dialect.MySQL5Dialect
MySQL5 with InnoDB	org.hibernate.dialect.MySQL5InnoDBDialect
MySQL with MyISAM	org.hibernate.dialect.MySQLMyISAMDialect
Oracle（any version）	org.hibernate.dialect.OracleDialect
Oracle 9i	org.hibernate.dialect.Oracle9iDialect
Oracle 10g	org.hibernate.dialect.Oracle10gDialect
Oracle 11g	org.hibernate.dialect.Oracle10gDialect
Sybase	org.hibernate.dialect.SybaseASE15Dialect
Sybase Anywhere	org.hibernate.dialect.SybaseAnywhereDialect
Microsoft SQL Server 2000	org.hibernate.dialect.SQLServerDialect
Microsoft SQL Server 2005	org.hibernate.dialect.SQLServer2005Dialect
Microsoft SQL Server 2008	org.hibernate.dialect.SQLServer2008Dialect
SAP DB	org.hibernate.dialect.SAPDBDialect
Informix	org.hibernate.dialect.InformixDialect
HypersonicSQL	org.hibernate.dialect.HSQLDialect
H2 Database	org.hibernate.dialect.H2Dialect
Ingres	org.hibernate.dialect.IngresDialect
Progress	org.hibernate.dialect.ProgressDialect
Mckoi SQL	org.hibernate.dialect.MckoiDialect
Interbase	org.hibernate.dialect.InterbaseDialect
Pointbase	org.hibernate.dialect.PointbaseDialect
FrontBase	org.hibernate.dialect.FrontbaseDialect
Firebird	org.hibernate.dialect.FirebirdDialect