我有一个config.properties文件:
limit=10
My springmvc-servlet.xml:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:config/config.properties</value>
</list>
</property>
</bean>
这是我的控制器类:
@Controller
@RequestMapping(...)
public class Test extends BaseController
{
@Value("${limit}") Integer limit; // This doesn't work
@Value("#{T(java.lang.Integer).parseInt(${limit})}") Integer limit; // This also doesn't work
@RequestMapping(...)
@ResponseBody
public String session()
{
return String.valueOf(limit);
}
}
错误消息是:
Error creating bean with name 'test': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: java.lang.Integer **.Test.limit; nested exception is org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.expression.spel.SpelParseException: EL1043E:(pos 31): Unexpected token. Expected 'rparen())' but was 'lcurly({)'
有什么想法吗?
尝试以下操作:
@Value("#{config.limit}") Integer limit;
http://docs.spring.io/spring/docs/3.0.x/spring-framework-reference/html/new-in-3.html 的文档
给出的例子有:
@Repository
public class RewardsTestDatabase {
@Value("#{systemProperties.databaseName}")
public void setDatabaseName(String dbName) { … }
@Value("#{strategyBean.databaseKeyGenerator}")
public void setKeyGenerator(KeyGenerator kg) { … }
}
更新:我测试过并遇到了同样的问题。按照如何将属性值注入注释配置的弹簧 mvc 3.0 控制器中的说明弄清楚了
在你的代码中:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:config/config.properties</value>
</list>
</property>
</bean>
类路径是指战争文件中的 WEB-INF/类路径。那么你在 WEB-INF/类中有配置文件夹吗?
如果是,则使用基于 xml 的配置进行检查,如下所示:
<bean id="dataSource" class="org.tempuri.DataBeanClass">
<property name="url" value="${url}"></property>
</bean>
如果仍然出现错误,则属性文件加载肯定存在问题。
试试这个:@Value("#{new Integer('${limit}')}")
和
<context:property-placeholder location="config/config.properties" />