菜鸟求援！！！！急！

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我做的是hibernate的HQL,出现了错误，请指教：

这是代码：

【1】.这是Employee类的定义：

package qau.edu.ren;

public class Employee {

private int no ;
private String name ;
private float salary ;

private Department dept ;

public int getNo() {
return no;
}

public void setNo(int no) {
this.no = no;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public float getSalary() {
return salary;
}

public void setSalary(float salary) {
this.salary = salary;
}

public Department getDept() {
return dept;
}

public void setDept(Department dept) {
this.dept = dept;
}


}

【2】.这是Department类的定义；

package qau.edu.ren;

import java.util.HashSet;
import java.util.Set;

public class Department {

private int no ;
private String name ;

private Set<Employee> employees = new HashSet<Employee>();

public int getNo() {
return no;
}

public void setNo(int no) {
this.no = no;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public Set<Employee> getEmployees() {
return employees;
}

public void setEmployees(Set<Employee> employees) {
this.employees = employees;
}}

【3】.下面是.cfg.xml配置文件；

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory name="foo">

<!-- 配置SQL是否在控制台进行打印 -->

<property name="show_sql">true</property>

<!-- 配置SQL是否在输出的时候进行格式化 -->

<property name="format_sql">true</property>

<!-- 配置连接数据库的信息 -->

<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
<property name="hibernate.connection.username">scott</property>
<property name="hibernate.connection.password">tiger</property>

<!-- 配置生成数据表的方式 -->

<property name="hbm2ddl.auto">update</property>

<!-- 配置数据库方言 -->

<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>

<!-- 配置关系映射文件加载的路径 -->
<!-- <mapping resource="qau/edu/hibernate/OneToMany/Customer.hbm.xml" />
<mapping resource="qau/edu/hibernate/OneToMany/Order.hbm.xml" /> <mapping
resource="qau/edu/One2One/foreign/Manager.hbm.xml" /> <mapping resource="qau/edu/One2One/foreign/Department.hbm.xml"
/> -->

<mapping resource="qau/edu/ren/Employee.hbm.xml" />
<mapping resource="qau/edu/ren/Department.hbm.xml" />

</session-factory>

</hibernate-configuration>

【4】.这是.hbm.xml文件；

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<class name="qau.edu.ren.Department" table="REN_DEPARTMENT">

<id name="no" type="int">
<column name="DEPT_ID" />
<generator class="native" />
</id>

<property name="name" type="java.lang.String">
<column name="NAME" />
</property>

<set name="employees" table="REN_EMPLOYEE" inverse="true" >
<key>
<column name="DEPT_ID" />
</key>
<one-to-many class="qau.edu.ren.Employee" />
</set>

</class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<class name="qau.edu.ren.Employee" table="REN_EMPLOYEE">

<id name="no" type="int">
<column name="EMP_ID" />
<generator class="native" />
</id>

<property name="name" type="java.lang.String">
<column name="NAME" />
</property>

<property name="salary" type="float">
<column name="SALARY" />
</property>

<many-to-one name="dept" class="qau.edu.ren.Department" >
<column name="DEPT_ID" />
</many-to-one>

</class>

</hibernate-mapping>

【5】.这是Test测试类；

package qau.edu.ren;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class Test {

public static void main(String[] args) {

Session session = new Configuration().configure().buildSessionFactory()
.openSession();// 获取Session；
Transaction tr = session.beginTransaction();// 开始事务；

// Employee emp = (Employee) session.get(Employee.class, 7369);
//
// Department dept = (Department) session.get(Department.class, 30);
//
// System.out.println(dept.getEmployees().size());

String hql ="FROM REN_EMPLOYEE e WHERE e.salary > ? and e.name like ?";

Query query = session.createQuery(hql);

query.setFloat(0,6000)
.setString(1, "%A%");


List<Employee> employees = query.list();

System.out.println(employees);
}
}

【6】.这是提示的异常，但是就是没有解决；（我是用的Oracle 11g 和plsqldev界面工具）

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" org.hibernate.hql.ast.QuerySyntaxException: REN_EMPLOYEE is not mapped [FROM REN_EMPLOYEE e WHERE e.salary > ? and e.name like ?]
at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:181)
at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:111)
at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:93)
at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:314)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3355)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3239)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:726)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:577)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:294)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:237)
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:98)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1760)
at qau.edu.ren.Test.main(Test.java:26)

菜鸟求援！！！！急！

标签：http   io   os   ar   java   for   sp   文件   数据   

原文地址：http://www.cnblogs.com/shiguangshuo/p/4056277.html