在春天，如何將對象從一個bean傳遞到另一個bean？

Question

我有一個實現RowMapper接口的行映射器類。我需要在那裏實現mapRow方法。它的參數是ResulSet和索引。我想在另一個bean中使用這個ResultSet對象。我如何得到它？

Answer 1

將此對象設置爲實例變量。但我絕不會推薦用於ResultSet。一旦春季關閉，結果集將無用武之地（春天正在管理它）。

更好地從ResultSet中提取數據將數據存儲爲實例變量中的某個模型bean（但請記住，默認情況下，bean是單例，並且對於每個將實例存儲爲實例變量的執行沒有多大意義其一）。

EDIT--沒關係細化一點，我把一個例子這裏

// this is singleton by default, if you want to store data in this bean 
// mark it as bean either by annotation or thorugh xml 
// so that it can be accessed through spring context 
public class MyBeanRowMapper implements RowMapper 
{ 
    // you can store something here, 
    // but with each execution of mapRow, it will be updated 
    // not recommended to store execution result here 
    // or inject other bean here // SomeOtherBean someOtherbean; 

    public Object mapRow(ResultSet rs, int rowNum) throws SQLException { 
     MyBean myBean = new MyBean(); 
     myBean.setId(rs.getInt("BEAN_ID")); 
     myBean.setName(rs.getString("NAME")); 
     // set this bean into gloablly accessible object here 
     // or to the bean in which you want to access the result 
     // something like -->// someOtherBean.setMyBean(myBean) 
     // again be careful if someOtherBean is singleton by default 

     return myBean; 
    } 
}