jdbctemplate

Using a query inside RowMapper

由 空扰寡人 提交于 2019-12-31 04:50:40
问题 In java i would do something like below to iterate the resultset and form the query, public Map<String, List<MODEL>> fun(){ Map<String, List<MODEL>> map = new TreeMap<String, List<MODEL>>(); LinkedHashSet<String> set = new LinkedHashSet<String>(); String sql = "select distinct(column) from table where conditions orderby column "; ResultSet rslt = stmt.executeQuery(sql); while (rslt.next()) { al.add(rslt.getString(1)); } for (String s : al) { List<MODEL> list = new ArrayList<MODEL>(); String

Oracle - update record and return updated date in same query

由 二次信任 提交于 2019-12-31 04:48:07
问题 I'm using Java 8 with Spring's JdbcTemplate and Oracle 12.1, I want to update record and get the exact time record was updated jdbcTemplate.update(UPDATE_SQL, null); Currently it returns (int) the number of rows affected, but I want the exact updated date Must I send a new request to get current time which may be inaccurate? More exact will be to save in column updated date, but then to execute another SQL Is there another option to get updated date in one query? Obviously, I don't want to

Does Spring's JdbcTemplate close the connection if an exception is thrown?

由 时光总嘲笑我的痴心妄想 提交于 2019-12-30 06:08:42
问题 When Spring catches an SQLException, does it close the prepared statement, result set, and/or connection before throwing it's own DataAccessException (runtime) exception? I have a developer who wants to create an AOP aspect to catch these exceptions and log and/or close the connection. @AfterThrowing(pointcut="dataAccessOperation()", throwing="exception") public void doRecoveryActions(JoinPoint thisJoinPoint, DataAccessException exception) { // log and/or close connection } 回答1: Yes. That's

Does Spring's JdbcTemplate close the connection after query timeout?

由 我的未来我决定 提交于 2019-12-30 03:55:29
问题 I have set query timeout (getJdbcTemplate().setQueryTimeout(5)) in method with insert statement. What will happen after query timeout, does jdbc template close my connection? 回答1: In short yes it does close the connection. The long answer it depends. When you don't have a Spring managed transaction then yes the JdbcTemplate will call the close() method on the Connection . However if there was already a connection available due to Springs transaction management closing the connection will be

why spring jdbcTemplate batchUpdate insert row by row

由 ⅰ亾dé卋堺 提交于 2019-12-30 03:26:13
问题 I have 200K rows to be inserted in one single database table. I tried to use jdbcTemplate.batchUpdate in spring in order to do insertion 10,000 per batch. However, this process consumes too much time (7 mins for 200K rows). So on database side, I check the number of rows inserted by select count(*) from table_X . I found the number of rows increased slightly instaed of 10K expected. Can anyone explain what's reason or is it something which should be configurated on Database side ? PS: I am

Mocking DataSource for JdbcTemplate with Mockito

由 你。 提交于 2019-12-29 09:12:15
问题 I'm trying to test a class in a Spring project. I would like to make as many changes as possible in the test class vs. the dao class so that I don't have to retest all sorts things because of a change. The class I'm working with has a JdbcTemplate template class variable that is instantiated by the following: setJdbcTemplate(DataSource dataSource) { this.template = new JdbcTemplate(dataSource); } The method I would like to test makes a template.query(<code>) to run a defined SQL query and

不适用配置config类以及 application.yml文件配置的情况下连接factorybean

由 佐手、 提交于 2019-12-28 11:15:46
不适用配置config类以及 application.yml文件配置的情况下连接factorybean /** 应用程序的启动引导类 （bootstrap class） 也是主要的spring 配置类 */ @SpringBootApplication //开启组件扫描和自动配置 @MapperScan(basePackageClasses = {YjgzDao.class}, sqlSessionFactoryRef = “sqlSessionFactory”) //@MapperScan(basePackages = “com.baowei.yjpt.springcloud.dao”) public class YjgzProvider8001Application { @Autowired private JdbcTemplate jdbcTemplate; public static void main(String[] args) { //负责启动引导应用程序 SpringApplication.run(YjgzProvider8001Application.class, args); } // /** // * 覆盖spring boot默认的 Http 消息转换器 // / @Bean public HttpMessageConverter

SpringJDBC配置版的使用

由 拜拜、爱过 提交于 2019-12-27 02:41:37
数据库的连接池以c3p0为例 整体概述: 1.将c3p0的配置文件c3p0.properties放到项目的resources文件夹下 2.在spring容器(spring.xml)中将连接池加载进来 3.让spring托管连接池,即:将c3p0的配置文件中的值配置进来 4.声明springJdbc工具类,并引入连接池 5.dao层使用即可. 对于2,3,4的代码实现: spring.xml: < ? xml version = "1.0" encoding = "UTF-8" ? > < beans xmlns = "http://www.springframework.org/schema/beans" xmlns : xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns : context = "http://www.springframework.org/schema/context" xsi : schemaLocation = "http : / / www . springframework . org / schema / beans http : / / www . springframework . org / schema / beans / spring - beans . xsd http : / /

Spring基于xml方式实现对事务的管理，来保证事务的特性

由 孤者浪人 提交于 2019-12-27 00:03:35
原始bean.xml配置文件内容如下： <!-- 0.从外部加载数据源 1.创建连接池 DriverManagerDataSource 设置4个属性 2.创建JdbcTemplate, 注入dataSource --> <!-- 0.从外部加载数据源 --> <context:property-placeholder location="classpath:db.properties"/> <!--1.创建连接池 DriverManagerDataSource 设置4个属性--> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!--2.创建JdbcTemplate, 注入dataSource-->

One ItemReader, 2 SQL Query, jdbcTemplate?

由 拟墨画扇 提交于 2019-12-25 07:46:23
问题 I have a requirement where I am reading from the database in two different Query . Each Query has its own SQL . The SQLs are similar and are going after the same set of tables for the most part, with minor differences. I wanted to check if I can have two SQLs in an ItemReader or maybe using a jdbctemplate is possible? Any ideas, sample code? 回答1: in the event that you want to 're-use' an existing JdbcCursorItemReader (or one of the other Spring Batch Jdbc*ItemReaders), you can switch the SQL
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