一个用hibernate做报表的问题
本人最近在技术转型过程中，从DELPHI开发平台转到JAVA开发平台。为了到达好的学习效果，我准备改造以前自己用DELPHI做的报表系统。在改造过程中，我决定用Hibernate做为持久化中间件。经过两个星期的学习和开发过程中，发现Hibernate并不适合做报表(也许我对HB的理解还不够吧
，希望牛人出来指点一下 )。如下面实例：
表结构：
create table dbo.owner_serverfee (owner_no char(4) not null,ls_name varchar(255) not null,area_name varchar(32) null,incomefee decimal(14, 2) not null,truemonth char(6) not null,addfee decimal(14, 2) null,reducefee decimal(14, 2) null,gen_time datetime not null,constraint PK_no_month PRIMARY KEY CLUSTERED (owner_no,ls_name,truemonth ))
通过MyEclipse生成对应的映射文件和POJO:
<?xml version="1.0" encoding="utf-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!-- Mapping file autogenerated by MyEclipse - Hibernate Tools--><hibernate-mapping> <class name="com.acidpie.bean.OwnerServerfee" table="owner_serverfee" schema="dbo" catalog="center06"> <composite-id name="id" type="java.lang.String"> <column name="ls_name" /> </key-property> <key-property name="ownerNo" type="java.lang.String"> <column name="owner_no" length="4" /> </key-property> <key-property name="truemonth" type="java.lang.String"> <column name="truemonth" length="6" /> </key-property> </composite-id> <property name="areaName" type="java.lang.String"> <column name="area_name" length="32" /> </property> <property name="incomefee" type="java.lang.Double"> <column name="incomefee" precision="14" not-null="true" /> </property> <property name="addfee" type="java.lang.Double"> <column name="addfee" precision="14" /> </property> <property name="reducefee" type="java.lang.Double"> <column name="reducefee" precision="14" /> </property> <property name="genTime" type="java.util.Date"> <column name="gen_time" length="23" not-null="true" /> </property> </class></hibernate-mapping>
package com.acidpie.bean;import java.util.Date;/** * OwnerServerfee generated by MyEclipse - Hibernate Tools */public class OwnerServerfee implements java.io.Serializable { // Fields private OwnerServerfeeId id; private String areaName; private Double incomefee; private Double addfee; private Double reducefee; private Date genTime; // Constructors /** default constructor */ public OwnerServerfee() { }/** minimal constructor */ public OwnerServerfee(OwnerServerfeeId id, Double incomefee, Date genTime) { this.id = id; this.incomefee = incomefee; this.genTime = genTime; } /** full constructor */ public OwnerServerfee(OwnerServerfeeId id, String areaName, Double incomefee, Double addfee, Double reducefee, Date genTime) { this.id = id; this.areaName = areaName; this.incomefee = incomefee; this.addfee = addfee; this.reducefee = reducefee; this.genTime = genTime; } // Property accessors public OwnerServerfeeId getId() { return this.id; } public void setId(OwnerServerfeeId id) { this.id = id; } public String getAreaName() { return this.areaName; } public void setAreaName(String areaName) { this.areaName = areaName; } public Double getIncomefee() { return this.incomefee; } public void setIncomefee(Double incomefee) { this.incomefee = incomefee; } public Double getAddfee() { return this.addfee; } public void setAddfee(Double addfee) { this.addfee = addfee; } public Double getReducefee() { return this.reducefee; } public void setReducefee(Double reducefee) { this.reducefee = reducefee; } public Date getGenTime() { return this.genTime; } public void setGenTime(Date genTime) { this.genTime = genTime; }}package com.acidpie.bean;/** * OwnerServerfeeId generated by MyEclipse - Hibernate Tools */public class OwnerServerfeeId implements java.io.Serializable { // Fields private String lsName; private String ownerNo; private String truemonth; // Constructors /** default constructor */ public OwnerServerfeeId() { } /** full constructor */ public OwnerServerfeeId(String lsName, String ownerNo, String truemonth) { this.lsName = lsName; this.ownerNo = ownerNo; this.truemonth = truemonth; } // Property accessors public String getlsName() { return this.lsName; } public void setlsName(String lsName) { this.lsName = lsName; } public String getOwnerNo() { return this.ownerNo; } public void setOwnerNo(String ownerNo) { this.ownerNo = ownerNo; } public String getTruemonth() { return this.truemonth; } public void setTruemonth(String truemonth) { this.truemonth = truemonth; } public boolean equals(Object other) { if ( (this == other ) ) return true; if ( (other == null ) ) return false; if ( !(other instanceof OwnerServerfeeId) ) return false; OwnerServerfeeId castOther = ( OwnerServerfeeId ) other; return ( (this.getlsName()==castOther.getlsName()) || ( this.getlsName()!=null && castOther.getlsName()!=null && this.getlsName().equals(castOther.getlsName()) ) ) && ( (this.getOwnerNo()==castOther.getOwnerNo()) || ( this.getOwnerNo()!=null && castOther.getOwnerNo()!=null && this.getOwnerNo().equals(castOther.getOwnerNo()) ) ) && ( (this.getTruemonth()==castOther.getTruemonth()) || ( this.getTruemonth()!=null && castOther.getTruemonth()!=null && this.getTruemonth().equals(castOther.getTruemonth()) ) ); } public int hashCode() { int result = 17; result = 37 * result + ( getlsName() == null ? 0 : this.getlsName().hashCode() ); result = 37 * result + ( getOwnerNo() == null ? 0 : this.getOwnerNo().hashCode() ); result = 37 * result + ( getTruemonth() == null ? 0 : this.getTruemonth().hashCode() ); return result; } }现有报表系统对该表进行查询的报表中SQL语句如下
select owner_no,area_name,sum(incomefee),sum(isnull(addfee,0)-isnull(reducefee,0)) from owner_serverfee where truemonth=:month group by owner_no,area_name
我用以下代码
Query qry=session.createQuery("select ownerNo,areaName,sum(incomefee),sum(isnull(addfee,0)-isnull(reducefee,0)) from OwnerServerfee where trueMonth=:month group by ownerNo,areaName"); qry.setString("month","200611"); List result = qry.list(); 会出现以下异常
Exception in thread "main" java.lang.IllegalStateException: No data type for node: org.hibernate.hql.ast.tree.IdentNode +-[IDENT] IdentNode: 'ownerNo' {originalText=ownerNo}at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:140)at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:702)at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:531)at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:645)at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:218)at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:158)at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:109)at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:75)at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:54)at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:71)at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1583)at com.acidpie.business.Test.main(Test.java:32)我个人分析是因为在针对owner_no,truemonth字段的get和set函数是在OwnerServerfeeId类中定义，而OwnerServerfeeId并没有映射文件。
但是我想了三天也没有解决如何通过hibernate来实现这个报表，如果还不行我只有用JDBC来实现了。
各位牛人！
用我的。
https://sourceforge.net/projects/dbcoat/ 6 楼 leonwoo 2007-05-19 No data type for node这个错误是因为你在hql欲查询的字段名（对象属性名）和hbm.xml中的属性不匹配或者找不到引起的。
hql中属性名必须和pojo中的属性名一致（区分大小写）。