Spring的jdbcTemplate使用方法

1、java查询数据库数据的方法，有mybatis和hibernate这样的框架，也可以的使用spring的sqlsession和jdbcTemplate框架

下面介绍jdbcTemplate的使用：

1、spring配置文件的配置实例

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource">
<ref local="dataSource" />
</property>
</bean>
<!-- 事务管理器配置, 使用jdbc事务 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

从代码我可以看到，它依赖的数据源还是datasource，c3p0的数据源接口等，这就是调取数据库的api

2、java端注解的使用

@Resource(name = "jdbcTemplate")

protected JdbcTemplate jdbcTemplate;

然后就可以使用jdbc接口查询和操作数据库了

3、常用的语句和结构

1、多条件的查询，还有就是返回的数据中直接使用实体类进行接收

String SQL="select a.id,a.url,a.diaoyu_type,a.time,a.msisdn,a.operater,a.status,a.name,a.id_numb,a.city, a.street, a.longitude, a.latitude,b.count from (select url,count(url) as count from user_info_view GROUP BY url) b,(SELECT * FROM user_info_view WHERE id IN ( SELECT MIN(id) FROM user_info_view GROUP BY url ) )a where a.url=b.url";
String sql=null;
RowMapper<UserInfoView> rowMapper = new BeanPropertyRowMapper<UserInfoView>(UserInfoView.class);
if(!StringUtils.isEmpty(searchForm.getUrl())){
SQL+=" and url="+"'"+searchForm.getUrl()+"'";
}
if(!StringUtils.isEmpty(searchForm.getDiaoYuType())){
SQL+=" and diaoyu_type="+"'"+searchForm.getDiaoYuType()+"'";
}
if(!StringUtils.isEmpty(searchForm.getTimeEnd())){
int dateEnd=stringToTimeStamp(searchForm.getTimeEnd());
SQL+=" and time<="+"'"+dateEnd+"'";
}
if(!StringUtils.isEmpty(searchForm.getTimeStart())){
int dateStart=stringToTimeStamp(searchForm.getTimeStart());
SQL+=" and time>="+"'"+dateStart+"'";
}
sql=SQL+" limit "+ start+','+pagesize;
result=jdbcTemplate.query(sql, rowMapper);

2、查询条件的动态配置
String sql = "select p.id, p.login,p.password,p.name,p.email,p.tel,g.name,p.create_time,p.state,p.withdraw_time from oper_person_info as p "
+ "left join oper_group_info as g on p.oper_group_id = g.id where 1 = 1 ";
List <Object> queryList=new ArrayList<Object>();
if (!name.equals("")) {
sql += " and p.name like ? ";
queryList.add("%" + name + "%");
}
if (!oper_group_id.equals("")) {
sql += " and p.oper_group_id = ? ";
queryList.add(oper_group_id）;
}
if (state == 1 || state == 0) {
sql += " and p.state = ? ";
queryList.add(state);
}

JdbcTemplate().query(sql, queryList.toArray(),
new OperatorSimpleMapper());