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在该文最下面的有一小段文字,其中写道:

With UserType s, also specify the sql-type. In xdoclet , we map user types this way

@hibernate.property type = "com.pfn.wirepower.srv.persistence.userTypes.OurCustomUserType" @hibernate.column name = "CustomObjectCol" sql-type="VARCHAR(50)"

/** 缩略图列表，按fileName1.xxx；fileName2.xxx；fileName3.xxx；... */	private Map
   
     fileNames;		/**	 * @hibernate.property  type="com.sunsci.material.ext.hibernate.MapType"	 * @hibernate.column name="fileNames" sql-type="text"	 * @return	 */	public Map
    
      getFileNames() {		return fileNames;	}	public void setFileNames(Map
     
       fileNames) {		this.fileNames = fileNames;	}
     
    
   

import java.io.Serializable;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Types;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import org.apache.commons.lang.StringUtils;import org.hibernate.Hibernate;import org.hibernate.HibernateException;import org.hibernate.usertype.UserType;public class ListType implements UserType {	private static final String SPLITTER = ";";	private static final int[] TYPES = new int[] { Types.VARCHAR };		public Object assemble(Serializable serializable, Object object)			throws HibernateException {		return deepCopy(serializable);	}		public Object deepCopy(Object object) throws HibernateException {		List sourceSet = (List) object;		List targetSet = new ArrayList();		if (sourceSet != null) {			targetSet.addAll(sourceSet);		}		return targetSet;	}		public Serializable disassemble(Object object) throws HibernateException {		return (Serializable) deepCopy(object);	}		public boolean equals(Object one, Object other) throws HibernateException {		if (one == other) {// 如果两个对象的指针是指向同一位置。			return true;		}		if (one != null && other != null) {			List set0 = (List) one;			List set1 = (List) other;			if (set0.size() != set1.size()) {// 如果列表的长度不相等				return false;			}			Object[] s0 = set0.toArray();			Object[] s1 = set1.toArray();			if (s0.length != s1.length) {// 如果列表的长度不相等				return false;			}			for (int i = 0; i < s0.length; i++) {				Object id0 = s0[i];				Object id1 = s1[i];				if (!id0.equals(id1)) {// 如果在列表中相同位置上的对象不相等					return false;				}			}			return true;		}		return false;	}		public int hashCode(Object object) throws HibernateException {		List s = (List) object;		return s.hashCode();	}		public boolean isMutable() {		return false;	}		public Object nullSafeGet(ResultSet resultSet, String[] stringArray,			Object object) throws HibernateException, SQLException {		String value = (String) Hibernate.STRING.nullSafeGet(resultSet,				stringArray[0]);		if (value != null) {			return parse(value);		} else {			return new ArrayList();		}	}	private List parse(String value) {		String[] strs = StringUtils.split(value, SPLITTER);		List set = new ArrayList();		for (int i = 0; i < strs.length; i++) {			if (StringUtils.isNotBlank(strs[i])) {				set.add(strs[i]);				// set.add(new Long(Long.parseLong(strs[i])));			}		}		return set;	}		public void nullSafeSet(PreparedStatement preparedStatement, Object object,			int _int) throws HibernateException, SQLException {		if (object != null) {			String str = assemble((List) object);			Hibernate.STRING.nullSafeSet(preparedStatement, str, _int);		} else {			Hibernate.STRING.nullSafeSet(preparedStatement, "", _int);		}	}	private String assemble(List set) {		StringBuffer sb = new StringBuffer();		Iterator it = set.iterator();		while (it.hasNext()) {			sb.append(it.next());			sb.append(SPLITTER);		}		String fs = sb.toString();		if (fs != null && fs.length() > 0 && fs.endsWith(SPLITTER)) {			fs = fs.substring(0, fs.length() - 1);		}		return fs;	}		public Object replace(Object object, Object object1, Object object2)			throws HibernateException {		return object;	}		public Class returnedClass() {		return List.class;	}		public int[] sqlTypes() {		return TYPES;	}}

import java.io.Serializable;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Types;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import org.apache.commons.collections.map.LinkedMap;import org.hibernate.Hibernate;import org.hibernate.HibernateException;import org.hibernate.usertype.UserType;/** * @author linzq *  */public class MapType implements UserType, Serializable {    private static final long serialVersionUID = -8041009346154850427L;    public MapType() {        super();    }    public MapType(Map attributeMap) {        super();        this.attributeMap = attributeMap;    }    private Map attributeMap;    public static final String SPLITTER = ";";    public static final String SEPARATOR = ":";    public static final String VALUE_BREAK = ",";    public static final char BRACKET_LEFT = '{';    public static final char BRACKET_RIGHT = '}';    public static final int[] SQLTYPES = new int[] { Types.VARCHAR};    public boolean isMutable() {        return false;    }    public int[] sqlTypes() {        return SQLTYPES;    }    public Object assemble(Serializable id, Object obj) throws HibernateException {        return null;    }    /**     * 将Map类型的属性拼接成字符串     *      * @param attributeList     * @return     * @throws HibernateException     */    public Object assemble(Map attributeMap) throws HibernateException {        if (attributeMap == null) {            return null;        }        StringBuffer asbl = new StringBuffer();        Iterator itr = attributeMap.keySet().iterator();        String _key = null;        while (itr.hasNext()) {            _key = (String) itr.next();            asbl.append(SPLITTER).append(BRACKET_LEFT).append(_key).append(SEPARATOR).append(attributeMap.get(_key)).append(BRACKET_RIGHT);        }        return asbl.toString().replaceFirst(SPLITTER, "");    }    /**     * 自定义类型的完全复制方法，返回一个和原自定义数据相同的新对象     *      * @param value     *            the object to be cloned, which may be null     * @return Object a copy     * @see org.hibernate.usertype.UserType#deepCopy(java.lang.Object)     */    public Object deepCopy(Object value) throws HibernateException {        if (value == null) {            return null;        }        Map sourceMap = (Map) value;        Map targetMap = new HashMap();        targetMap.putAll(sourceMap);        return targetMap;    }    /**     * 自定义数据类型的比较方法     *      * @param x     * @param y     * @return boolean     * @see org.hibernate.usertype.UserType#equals(java.lang.Object,     *      java.lang.Object)     */    public boolean equals(Object x, Object y) throws HibernateException {        if (x == y) {            return true;        }        if (x != null && y != null) {            Map xMap = (Map) x;            Map yMap = (Map) y;            if (xMap.size() != yMap.size()) {                return false;            }            List
   
     _xList = new ArrayList(xMap.keySet());            List
    
      _yList = new ArrayList(xMap.keySet());            Collections.sort(_xList);            Collections.sort(_yList);            for (int i = 0; i < xMap.size(); i++) {                if (!_xList.get(i).equals(_yList.get(i))) {                    return false;                }                if (!xMap.get(_xList.get(i)).equals(yMap.get(_yList.get(i)))) {                    return false;                }            }            return true;        }        return false;    }    public int hashCode(Object arg0) throws HibernateException {        return attributeMap.hashCode();    }    /**     * 将以格式为{key:value};{key:value1,value2}的字符串数组解析成一个Map     *      * @param value     * @return     */    public Map parse(String value) {        if (value == null) {            return null;        }        String[] strs = org.apache.commons.lang.StringUtils.split(value.trim(), SPLITTER);        Map attributeMap = new LinkedMap();        String _temp = null;        for (int i = 0; i < strs.length; i++) {            _temp = strs[i].substring(1, strs[i].length() - 1);            attributeMap.put(_temp.split(SEPARATOR, 2)[0], _temp.split(SEPARATOR, 2)[1]);        }        return attributeMap;    }    /**     * 从JDBC的ResultSet中读取数据，并将其转换为自定义类型后返回。 此方法要求对可能出现null的情况做处理。     * names中包含了当前自定义类型的映射字段名称。     *      * @param rs     *            a JDBC result set     * @param names     *            the column names     * @param owner     *            the containing entity     * @return Object     * @throws HibernateException     * @throws SQLException     * @see org.hibernate.usertype.UserType#nullSafeGet(java.sql.ResultSet,     *      java.lang.String[], java.lang.Object)     */    public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {        String value = (String) Hibernate.STRING.nullSafeGet(rs, names[0]);        if (value != null) {            attributeMap = parse(value);            return attributeMap;        }        return null;    }    /**     * 在Hibernate进行数据保存时被调用 可以通过PreparedStatement将自定义数据写入对应的数据库字段中     * names中包含了当前自定义类型的映射字段名称。     *      * @param st     *            a JDBC prepared statement     * @param value     *            the object to write     * @param index     *            statement parameter index     * @throws HibernateException     * @throws SQLException     * @see org.hibernate.usertype.UserType#nullSafeGet(java.sql.ResultSet,     *      java.lang.String[], java.lang.Object)     */    public void nullSafeSet(PreparedStatement pst, Object value, int index) throws HibernateException, SQLException {        if (value != null) {            Hibernate.STRING.nullSafeSet(pst, assemble((Map) value), index);        } else {            Hibernate.STRING.nullSafeSet(pst, value, index);        }    }    public Class returnedClass() {        return MapType.class;    }    public Object replace(Object arg0, Object arg1, Object arg2) throws HibernateException {        return null;    }    public Serializable disassemble(Object arg0) throws HibernateException {        return null;    }    public Map getAttributeMap() {        return attributeMap;    }    public void setAttributeMap(Map attributeMap) {        this.attributeMap = attributeMap;    }}
    
   

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