Month: May 2010

http://static.springsource.org/spring/docs/2.5.6/reference/testing.html 8.3.7.5.2. JUnit 4.4 support classes simpleJdbcTemplate: useful for querying to confirm state. For example, you might query before and after testing application code that creates an object and persists it using an ORM tool, to verify that the data appears in the database. (Spring will ensure that the query runs in the scope of …

[Spring Testing] Call hibernateTemplate.flush() manually Read More »

这种情况这么办？ public class Parent{ private List<String> sons; //我希望把这个关系映射到 parent_child 表 private List<String> daughters; //我希望把这个关系也映射到 parent_child 表 } 答案是： You can’t do it. 看这个URL： [url] http://stackoverflow.com/questions/669828/how-to-have-2-collections-of-the-same-type-in-jpa[/url]

WebApplicaitonContext ctx = WebApplicationCntextUtils.getWebApplicationContext(servletContext);

要先做空值判断，如 <#if dateRangeStart??> ${dateRangeStart?string("MM/dd/yyyy")} </#if>

<#escape x as x?html>   还不够，因为它不能对付x为空的问题。更保险的写法是     <#escape x as (x!)?html>   

1. JdbcTemplate is thread-safe. So a single instance of JdbcTemplate will be enough for the whole system, unless you have more than one data sources. 2. NamedParameterJdbcTemplate String sql = "select * from t where t.firstName = :firstName "   You can then provider with a map — map.put("firstName", "xxx")   or a java bean  …

[Relearn Spring] 5 Jdbc Support Read More »

Annotation based Management   1. Use @Transactional along with <tx:annotaion-driven/>   2. Note: Calling a @Transactional method in the same class will not take effect if you are not using AspectJ for AOP. It’s OK to use HibernateTransactionManager with JdbcTemplate   here it is: 引用 This transaction manager is appropriate for applications that use a …

[Relearn Spring] 4 Transaction Management Read More »

1. ‘Resource’ is actually a more powerful version of java.net.URL.     What’s more, Spring suggests you use it as a generic utility class, even without Spring. 2. Built-in Implementations.     a.UrlResource     b.ClasspathResource     c.FileSystemResource     d.ServletContextResource     e.InputStreamResource     f.ByteArrayResource

1. For Injection @Required @Autowired   — wire by type @Resource    — wire by name @Qulifier 2. For Declaration @Component @Service @Repository @Controller These annotations will take effect only if <context:component-scan> is used.