用于所有数据源连接的连接池类.它有一个静态枚举来指示连接类型.
class ConnectionPool { public static enum Type { t1,t2,t3; } … }@H_301_8@另一个类没有默认承包商,构造函数将Type作为承包商参数
class Update { public Update(Type type) { this.type = type; } ... }@H_301_8@在applicationContext.xml中,定义一个bean
<bean id="update" class="package.Update"> <contructor-arg type="package.ConnectionPool.Type"> <value>Type.t1</value> </contructor-arg> </bean>@H_301_8@但是我得到了
Error creating bean with name 'update' defined in class path resource [applicationContext.xml]: Unsatisfied dependency expressed through constructor argument with index 0 of type [package.ConnectionPools$PoolType]: Ambiguous constructor argument types - did you specify the correct bean references as constructor arguments?@H_301_8@
最佳答案
这应该工作：
<bean id="update" class="package.Update"> <contructor-arg type="package.ConnectionPool.Type"> <value>t1</value> </contructor-arg> </bean>@H_301_8@甚至：
<bean id="update" class="package.Update"> <contructor-arg type="package.ConnectionPool.Type" value="t1"/> </bean>@H_301_8@或我最喜欢的：
@Configuration public class Config { @Bean public Update update() { return new Update(t1); } }@H_301_8@
