修改查询结果更新到数据库 Oracle Java

=======oracle 表 sql 

  CREATE TABLE "SMALL19RAIN"."R_TABLE_STU" 
   (	"NAME" VARCHAR2(200 BYTE), 
	"AGE" NUMBER, 
	"STU_ID" NUMBER NOT NULL ENABLE, 
	"DATARAIN" VARCHAR2(200 BYTE)
   ) SEGMENT CREATION IMMEDIATE 
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 
 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "SMALLRAIN19TABLESPACE" ;

=======Java 代码

package org.rain.db;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class SmallRainDBUpdate {
	public static void main(String[] args) {
		 
		Connection smallrainConn = null;
		Statement smallrainStmt = null;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			smallrainConn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "smallrain123456789",
					"Xiaoyu123456789");
 
			smallrainStmt = smallrainConn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
			ResultSet smallRainResultSet = smallrainStmt.executeQuery("SELECT STU_ID, AGE, NAME FROM R_TABLE_STU"); 
			
	            if (smallRainResultSet.next()) {
	            	smallRainResultSet.updateString("NAME", "rain更新");
	            	smallRainResultSet.updateInt("AGE", 56);

	            	smallRainResultSet.updateRow();
	                System.out.println("数据更新成功");
	            }
		} catch (Exception e) {
				System.out.println("SQL出错");
		} finally {
			if (null != smallrainStmt) {
				try {
					smallrainStmt.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			if (null != smallrainConn) {
				try {
 
					smallrainConn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
 
		}
	}
}