Question

我正在处理一些现有的应用程序，它在服务器启动时加载单个数据库查询。

现在我想在同一个代码中传递更多（可能3-4个查询）而不是一个查询。即如何在春天传递多个查询

这是代码 -

myspring.xml

<property name="mypropertyfiles">
    <list>
        <value>test1.properties</value>
        <value>test2.properties</value>
     </list>
</property>

<bean id="mybean" class="com.test.MyBean">
    <constructor-arg><ref-bean="mypropertyfiles"/><const-arg>
    <constructor-arg><ref-bean="dataSource"/><const-arg>
    <constructor-arg><value>select pcode, pname from PRODUCT1</value>  
    // Here only one query. **but I want to pass more queries like** 
    //select  pcode, pname from PRODUCT2,
    //select ocode, oname from ORDER1,
    //select ocode, oname from ORDER2
    <const-arg> <property name="systemPropertiesModeName"  value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
</bean>

MyBean.java

public  class MyBean extends PropertyPlaceholderConfigurer 
{

private DataSource dSource;
private String dbQuery;
// this is existing map to store PRODUCT1 table details
Map product1Map = new ConcurrentHashMap(); 
//lly, I will create more product2Map,order1Map , order2Map  to store my 
//queries data from PRODUCT2,ORDER1,ORDER2 tables

// here it is taking only one query.But I want more queries ie list
MyBean (Resource[] resources , DataSource dSource,String dbQuery){
      super();
  setLocations(resources);
  this.dSource=dSource;
  this.dbQuery=dbQuery;
}

@override
public String resolvePlaceholder(String p,Peroperties p){
//some code.....
    loadQuery();
}


 loadQuery(){
    JdbcTemplate j;
    j.execute(dbQuery,.......) // exsiting code has one query only{
    public Map doInPreparestament(Preaprestatement ps){
        rs =ps.executeQuery..
            while(rs.next){
                product1Map.put(rs.getString("pcode"),rs.getString("pname")); // only one map
            }
    }
}

}

问题 -

如何从“myspring.xml”文件
我想使用现有的loadQuery方法加载我的所有查询并放入其他地图，例如product2Map，order1Map，order2Map

Spring PropertyPlaceholderConfigurer并在启动时传递多个查询

0 个答案: