我有一个包含两个字段orderid，flow的数据库。
Orderid字段将包含n个orderid整数。
流场将有7个字符串，用于对订单ID进行分类，属于此流程。
现在我想根据流类型对所有orderid字段进行分类。
我在java jdbc类中编写了多个sql语句的代码。
当我运行代码时，我得到第一个结果集sql查询的结果，但不是我的第二个结果集sql查询。
我使用两个单独的结果集，下面是我的代码段。
任何人都可以帮助我实现这个目标吗？
谢谢。
package com;
import java.sql.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Scanner;
import com.mysql.jdbc.exceptions.MySQLSyntaxErrorException;
public class getOrderinfo
{
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_URL = "jdbc:mysql://10.10.10.14/opsbank-ii";
static final String USER = "root";
static final String PASS = "p@ssw0rd";
public static int row_count=0;
public static int count_for_totalfiles=0;
public static String filename_allocated="";
public static String dateofcar_allocated="";
public String row_data="";
public static int orderid=0;
public static int[] orderid_sto=new int[15000];
public static int[] orderid_ABPEL=new int[15000];
public static int[] orderid_WBPG=new int[15000];
public static int[] orderid_sto2=new int[15000];
public static String flow="";
public static String[] flow_sto=new String[15000];
public static String[] flow_ABPEL=new String[15000];
public static String[] flow_WBPG=new String[15000];
public static String[] flow_sto2=new String[15000];
public static Date dateofprocessing;
public static Date[] dateofprocessing_sto=new Date[15000];
public static Date[] dateofprocessing_sto2=new Date[15000];
public static Date[] dateofprocessing_WBPG=new Date[15000];
public static String Filename_ret0="";
public static String Filename_ret_ABPEL="";
public static String Filename_ret_WBPG="";
public static String Filename0_all="";
public static String Filename0_all_ABPEL="";
public static String Filename0_all_WBPG="";
public static String Filenameafterlastchar0="";
public static String Filenameafterlastchar0_ABPEL="";
public static String Filenameafterlastchar0_WBPG="";
public static void main(String args[]) throws SQLTimeoutException
{
//public static void main(String[] args)
Connection conn = null;
Statement stmt = null,stmt1=null;
try{
//STEP 2: Register JDBC driver
Class.forName("com.mysql.jdbc.Driver");
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the Date(Format : 2016-02-22) ");
String date = scanner.next();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MMM-yyyy");
Date date2=null;
/* try {
//Parsing the String
date2 = (Date) dateFormat.parse(date);
}
catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
System.out.println("Input Date:"+date);
//STEP 3: Open a connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL,USER,PASS);
//STEP 4: Execute a query
System.out.println("Creating statement...");
stmt = conn.createStatement();
stmt1=conn.createStatement();
String sql,sql_WBPG;
sql = "select orderid,flow,dateofprocessing from orderinfo where
ordertype='CAR' and dateofprocessing like '%"+date+"%'and flow='ABPEL'";
sql_WBPG = "select orderid,flow,dateofprocessing from
orderinfo where
ordertype='CAR' and dateofprocessing like '%"+date+"%'and flow='WBPG'";
ResultSet rs = stmt.executeQuery(sql);
//STEP 5: Extract data from result set
System.out.println("For WBPG:\n");
System.out.println("-----------------------
---------------------------------------\n");
while(rs.next()){
int i=0;
orderid_sto[i]=rs.getInt("orderid");
flow_sto[i]=rs.getString("flow");
dateofprocessing_sto[i]=rs.getDate("dateofprocessing");
// System.out.println("Order ID get : "+orderid);
// orderid_sto[i]=orderid;
// System.out.println("Order ID After storing : "+orderid_sto[i]);
// flow_sto[i++]=flow;
// dateofprocessing_sto[i++]=dateofprocessing;
System.out.println("orderid :"+orderid_sto[i]+" || Flow :
"+flow_sto[i]+" || date : "+dateofprocessing_sto[i]);
// System.out.println(orderid_sto[i]);
i++;
row_count++;
count_for_totalfiles++;
Filename_ret0="'"+rs.getInt("orderid")+"',";
Filename0_all=Filename0_all+Filename_ret0;
//Display values
//System.out.print("BOOKISSID: " + BOOKISSID);
//System.out.print(", ISSN: " + ISSN);
//System.out.println("\n");
}
System.out.println("Total Number of CAR orders found for the date : "+date2+" = "+row_count);
//after removing the comma
if (Filename0_all.length() > 0 &&
Filename0_all.charAt(Filename0_all.length()-1)==',')
{
Filenameafterlastchar0 = Filename0_all.substring(0,
Filename0_all.length()-1);
}
else
{
System.out.println("comma not found as last character :1 ");
}
System.out.println("combined name after comma removal :1
:"+Filenameafterlastchar0);
System.out.println("For WBPG:\n");
System.out.println("-------------------------------
-------------------------------\n");
ResultSet rs_WBPG=stmt1.executeQuery(sql_WBPG);
while(rs_WBPG.next())
{
int j=0;
orderid_WBPG[j]=rs_rs_WBPG.getInt("orderid");
flow_WBPG[j]=rs_rs_WBPG.getString("flow");
Filename_ret_WBPG="'"+rs.getInt("orderid")+"',";
Filename0_all_WBPG=Filename0_all_WBPG+Filename_ret_WBPG;
System.out.println("orderid :"+orderid_WBPG[j]+" || Flow :
"+flow_WBPG[j]+" || date : "+dateofprocessing_WBPG[j]);
}
//after removing the comma for ABPEL
if (Filename0_all_WBPG.length() > 0 &&
Filename0_all_WBPG.charAt(Filename0_all_WBPG.length()-1)==',')
{
Filenameafterlastchar0_WBPG = Filename0_all_WBPG.substring(0,
Filename0_all_WBPG.length()-1);
}
else
{
System.out.println("comma not found as last character :1 ");
}
System.out.println("combined name after comma removal for ABPEL:1
:"+Filenameafterlastchar0_WBPG);
//STEP 6: Clean-up environment
rs.close();
rs_WBPG.close();
stmt.close();
conn.close();
}
catch(SQLTimeoutException ste)
{
System.out.println("\nSQL Time out Error...");
System.out.println("\nplease Restart the services...");
ste.printStackTrace();
}
catch(MySQLSyntaxErrorException mysqlerr)
{
System.out.println("date issue");
}
catch(SQLException se){
//Handle errors for JDBC
se.printStackTrace();
}catch(Exception e){
//Handle errors for Class.forName
e.printStackTrace();
}
finally{
//finally block used to close resources
try{
if(stmt!=null)
stmt.close();
}catch(SQLException se2){
}// nothing we can do
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}//end finally try
}//end try
}//end main
}//end FirstExample
摘录的结尾。
以下是从while（！rs_WBPG.next（））更改为（rs_WBPG.next（））后获取的错误
java.sql.SQLException: After end of result set
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
at com.mysql.jdbc.ResultSetImpl.checkRowPos(ResultSetImpl.java:854)
at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2709)
at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2850)
at com.getOrderinfo.main(getOrderinfo.java:162)
提前致谢。
答案 0 :(得分：0)
您将循环内的i索引重置为0，因此您只需为每个数组的第一个元素指定值。
变化：
while (rs.next()) {
int i = 0;
...
i++;
}
为：
int i = 0;
while (rs.next()) {
...
i++;
}
编辑：
你的第二个循环应该是：
int j = 0;
while(rs_WBPG.next()) {
...
orderid_WBPG[j]=rs_WBPG.getInt("orderid");
...
j++;
}
答案 1 :(得分：0)
在第二个循环中，您使用的是旧版本。使用您创建的新rs_WBPG。基本上你从第一个循环中复制粘贴，但没有改变循环中的值
while(!rs_WBPG.next())
{
int j=0;
orderid_WBPG[j]=rs_WBPG.getInt("orderid");
flow_WBPG[j]=rs_WBPG.getString("flow");
Filename_ret_WBPG="'"+rs_WBPG.getInt("orderid")+"',";
Filename0_all_WBPG=Filename0_all_WBPG+Filename_ret_WBPG;
System.out.println("orderid :"+orderid_WBPG[j]+" || Flow :
"+flow_WBPG[j]+" || date : "+dateofprocessing_WBPG[j]);
}