java - 如何将结果集的值存储为 int？

Question

如果结果集的值超过30000，我需要从jsp打开一个div标签。但是如何将rs的值存储为int？

try {
    Class.forName("com.ibm.db2.jcc.DB2Driver");                              
    con = DriverManager.getConnection (urlPrefix, "uname", "pwd");
    System.out.println("got connection");
    stmt = con.createStatement();
    String strQuery = "SELECT count(*) FROM  tablename where condition stmt";
    rs = stmt.executeQuery(strQuery);
    if (rs>30000) {
        request.getParameter("view");
    }
    System.out.println("executed query");
} catch(Exception e) {
    System.out.println(e);
}

Answer 1

rs = stmt.executeQuery(strQuery);

stmt.executeQuery 返回一个 ResultSet 对象，我们可以从该对象检索查询结果，如下所示。

rs = stmt.executeQuery(strQuery);
int count=0;
if(rs.next()){
    count=rs.getInt(1);
}