Hibernate中查询表名、字段名以及字段类型等信息的工具类
package com.lmb.ui.util;import org.hibernate.cfg.Configuration;import org.hibernate.mapping.Column;import org.hibernate.mapping.PersistentClass;import org.hibernate.mapping.Property;import java.util.Iterator;/*** 功能描述：根据实体类得到对应的表名、主键名、字段名工具类*/public class HibernateConfigurationHelper {private static Configuration hibernateConf;private static Configuration getHibernateConf() {if (hibernateConf == null) {return new Configuration();}return hibernateConf;}private static PersistentClass getPersistentClass(Class clazz) {synchronized (HibernateConfigurationHelper.class) {PersistentClass pc = getHibernateConf().getClassMapping(clazz.getName());if (pc == null) {hibernateConf = getHibernateConf().addClass(clazz);pc = getHibernateConf().getClassMapping(clazz.getName());}return pc;}}/*** 功能描述：获取实体对应的表名** @param clazz 实体类* @return 表名*/public static String getTableName(Class clazz) {return getPersistentClass(clazz).getTable().getName();}/*** 功能描述：获取实体对应表的主键字段名称** @param clazz 实体类* @return 主键字段名称*/public static String getPkColumnName(Class clazz) {return getPersistentClass(clazz).getTable().getPrimaryKey().getColumn(0).getName();}/*** 功能描述：通过实体类和属性，获取实体类属性对应的表字段名称** @param clazz 实体类* @param propertyName 属性名称* @return 字段名称*/public static String getColumnName(Class clazz, String propertyName) {PersistentClass persistentClass = getPersistentClass(clazz);Property property = persistentClass.getProperty(propertyName);Iterator it = property.getColumnIterator();if (it.hasNext()) {Column column = (Column) it.next();return column.getName();}return null;}/*** 功能描述：通过实体类和属性，获取实体类属性对应的表字段类型** @param clazz 实体类* @param propertyName 属性名称* @return 字段名称*/public static String getColumnType(Class clazz, String propertyName) {PersistentClass persistentClass = getPersistentClass(clazz);Property property = persistentClass.getProperty(propertyName);String type = property.getType().getName();if (type.equals("timestamp")) {return "java.sql." + type.substring(0, 1).toUpperCase() + type.substring(1);} else {return "java.lang." + type.substring(0, 1).toUpperCase() + type.substring(1);}}/*** 获得实体类的主键属性名称，如果没有返回null** @param clazz 实体类的class对象* @return 实体类主键属性名称*/public static String getPrimaryKeyName(Class clazz) {PersistentClass persistentClass = getPersistentClass(clazz);Property property = persistentClass.getIdentifierProperty();if (property != null) {return property.getName();}return null;}}
