Java调用存储过程（有返回值）

import java.sql.CallableStatement;  
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.ResultSet;  
import java.sql.SQLException;  
import java.sql.Statement;  
import java.sql.Types;  
  
public class TestProcedureTwo {  
  public TestProcedureTwo() {  
  }  
  public static void main(String[] args ){  
    String driver = "oracle.jdbc.driver.OracleDriver";  
    String strUrl = "jdbc:oracle:thin:@localhost:1521:myoracle";  
    Statement stmt = null;  
    ResultSet rs = null;  
    Connection conn = null;  
    try {  
      Class.forName(driver);  
      conn =  DriverManager.getConnection(strUrl, "system", "admin");  
      CallableStatement proc = null;  
      proc = conn.prepareCall("{ call dem_procedure(?,?) }");  
      proc.setString(1, "kalision");  
      proc.registerOutParameter(2, Types.VARCHAR);  
      proc.execute();  
      String testPrint = proc.getString(2);  
      System.out.println("存储过程返回的值是："+testPrint);  
    }  
    catch (SQLException ex2) {  
      ex2.printStackTrace();  
    }  
    catch (Exception ex2) {  
      ex2.printStackTrace();  
    }  
    finally{  
      try {  
        if(rs != null){  
          rs.close();  
          if(stmt!=null){  
            stmt.close();  
          }  
          if(conn!=null){  
            conn.close();  
          }  
        }  
      }  
      catch (SQLException ex1) {  
      }  
    }  
  }  
}