No Dialect mapping for JDBC type
2011-05-21 18:23
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解决方法就是自定义一个Hibernate Dialect.
Java代码
package com.yourcompany.util ;
import java.sql.Types;
import org.hibernate.Hibernate;
import org.hibernate.dialect.MySQL5Dialect;
public class CustomDialect extends MySQL5Dialect {
public CustomDialect() {
super();
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
registerHibernateType(-1, Hibernate.STRING.getName());
}
}
Java代码
package com.yourcompany.util ;
import java.sql.Types;
import org.hibernate.Hibernate;
import org.hibernate.dialect.MySQL5Dialect;
public class CustomDialect extends MySQL5Dialect {
public CustomDialect() {
super();
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
registerHibernateType(-1, Hibernate.STRING.getName());
}
}
然后将hibernate配置文件(或是Spring配置文件)中配置数据库方言的那一项,改成上面自定义的方言.:
Java代码
<property name="hibernate.dialect">
com.yourcompany.CustomDialect
</property>
Java代码
<property name="hibernate.dialect">
com.yourcompany.CustomDialect
</property>
说明: 如果你的数据库是mysql,而又用了decimal类型,报错应该是 No Dialect mapping for JDBC type: 3 . 注意这个3, 它说明hibernate不能将这种数据类型映射到你的java类中. 就需要在自定义的方言中用到:
Java代码
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
Java代码
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
这句代码.
如果你用了text数据类型,hibernate根本就不认识这种数据类型,所以会返回No Dialect mapping for JDBC type: -1
. 这样的话,就需要在方言中加入
Java代码
package com.yourcompany.util ;
import java.sql.Types;
import org.hibernate.Hibernate;
import org.hibernate.dialect.MySQL5Dialect;
public class CustomDialect extends MySQL5Dialect {
public CustomDialect() {
super();
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
registerHibernateType(-1, Hibernate.STRING.getName());
}
}
Java代码
package com.yourcompany.util ;
import java.sql.Types;
import org.hibernate.Hibernate;
import org.hibernate.dialect.MySQL5Dialect;
public class CustomDialect extends MySQL5Dialect {
public CustomDialect() {
super();
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
registerHibernateType(-1, Hibernate.STRING.getName());
}
}
然后将hibernate配置文件(或是Spring配置文件)中配置数据库方言的那一项,改成上面自定义的方言.:
Java代码
<property name="hibernate.dialect">
com.yourcompany.CustomDialect
</property>
Java代码
<property name="hibernate.dialect">
com.yourcompany.CustomDialect
</property>
说明: 如果你的数据库是mysql,而又用了decimal类型,报错应该是 No Dialect mapping for JDBC type: 3 . 注意这个3, 它说明hibernate不能将这种数据类型映射到你的java类中. 就需要在自定义的方言中用到:
Java代码
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
Java代码
registerHibernateType(Types.DECIMAL, Hibernate.BIG_DECIMAL.getName());
这句代码.
如果你用了text数据类型,hibernate根本就不认识这种数据类型,所以会返回No Dialect mapping for JDBC type: -1
. 这样的话,就需要在方言中加入
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