执行 servlet 时出现 MySQL 异常。我找不到查询中语法出错的地方。我正在关注异常 -
com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: 您的 SQL 语法有错误；查看与您的 MySQL 服务器版本对应的手册，了解在 's1.employee_id='I123' 和 s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d') -' 附近使用的正确语法第 1 行
下面是包含 mysql 查询的 servlet -
import java.io.IOException;
import java.sql.ResultSet;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class HomepageTable extends connection {
String sql,table;
ResultSet rs = null;
private static final long serialVersionUID = 1L;
Date now = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("EEE", Locale.US);
String asWeek = dateFormat.format(now);
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try
{
System.out.println(asWeek);
get_connection();
if(asWeek.equals("Mon"))
{
sql="select e1.employee_name,d1.dealer_name , d2.distributor_name , s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
"from sales_master_table s1 " +
"left join dealers_info d1 on s1.dealer_visited = d1.dealer_id " +
"left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
"left join territory_master_table r1 on r1.region_code = s1.region" +
"left join area_master_table a1 on a1.area_code = s1.area" +
"left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
"where " +
"s1.employee_id=? and" +
"s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
"union" +
"select e1.employee_name,d1.dealer_name , d2.distributor_name , s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
"from sales_master_table s1" +
"left join dealers_info d1 on s1.dealer_visited = d1.dealer_id" +
"left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
"left join territory_master_table r1 on r1.region_code = s1.region" +
"left join area_master_table a1 on a1.area_code = s1.area" +
"left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
"where" +
"s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
"and level1_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
"or level2_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
"or level3_head= (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?)";
}
else
{
sql="(select e1.employee_name,d1.dealer_name , d2.distributor_name , s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
"from sales_master_table s1 " +
"left join dealers_info d1 on s1.dealer_visited = d1.dealer_id " +
"left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
"left join territory_master_table r1 on r1.region_code = s1.region" +
"left join area_master_table a1 on a1.area_code = s1.area" +
"left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
"where " +
"s1.employee_id=? and " +
"s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')-INTERVAL 2 DAY)" +
" union" +
"(select e1.employee_name,d1.dealer_name , d2.distributor_name , s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
"from sales_master_table s1" +
"left join dealers_info d1 on s1.dealer_visited = d1.dealer_id" +
"left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
"left join territory_master_table r1 on r1.region_code = s1.region" +
"left join area_master_table a1 on a1.area_code = s1.area" +
"left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
"where " +
"s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
"and level1_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
"or level2_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
"or level3_head= (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
"where e2.employee_id=s2.employee_id and s2.employee_id=?))";
}
st=con.prepareStatement(sql);
HttpSession session = request.getSession();
String userid = (String)session.getAttribute("userid");
st.setString(1, userid);
st.setString(2, userid);
st.setString(3, userid);
st.setString(4, userid);
rs = st.executeQuery();
table="<thead>" +
"<tr>" +
"<td>Dealer</td>" +
"<td>Distributor</td>" +
"<td>Region</td>" +
"<td>Area</td>" +
"<td>Invoice Date</td>" +
"<td>Payment Date</td>" +
"<td>Amount</td>" +
"</tr></thead><tbody>";
while(rs.next())
{ table+="<tr>";
table+="<td>"+rs.getString("Dealer_name")+"</td>";
table+="<td>"+rs.getString("distributor_name")+"</td>";
table+="<td>"+rs.getString("region_name")+"</td>";
table+="<td>"+rs.getString("area_name")+"</td>";
table+="<td>"+rs.getString("invoice_created_date")+"</td>";
table+="<td>"+rs.getString("payment_date")+"</td>";
table+="<td>"+rs.getString("amount")+"</td>";
table+="</tr>";
}
table+="</tbody>";
response.getWriter().print(table);
st.close();
rs.close();
close_connection();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
最佳答案
"left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
"where" +
"s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
在许多地方，您没有在关键字之间添加空格。上面的片段变成:
left join employee_master_table e1 on e1.employee_id=s1.employee_idwheres1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
不要像这样构建 SQL。尝试使用存储过程或至少将查询从您的代码中取出并放入资源文件中。
关于java - MySql异常语法错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16996265/