日期:2014-05-18  浏览次数:20673 次

hibernate 查询问题

就是我有一张表
在eclipse中加入了hibernate 想通过hibernate 查询出 数据
我在本地运行的sql 是select province,city from code where province = '湖南省' group by city;
能够查询出 

Code.java
package com.test.hibernate;

import javax.persistence.Entity;
import javax.persistence.Id;


@Entity
public class Code {

private int id;
private String province;
private String city;
private String county;
private int postcode;

@Id
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province = province;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getCounty() {
return county;
}
public void setCounty(String county) {
this.county = county;
}
public int getPostcode() {
return postcode;
}
public void setPostcode(int postcode) {
this.postcode = postcode;
}

}


hibernate.cfg.xml
<?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/code</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache&n