Question

我编译了这个，但是这个代码在resultSet.getDate（）方法中出现了java.sql.SQLException和java.text.ParseException。

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

class Main {
    public static void main(String[] args) throws SQLException {
        try {
            Class.forName("org.sqlite.JDBC");

            Connection connection = DriverManager.getConnection
            ("jdbc:sqlite:C:/sqlite-tools/test.db");

            Statement statement = connection.createStatement();

            String sql = "CREATE TABLE t1 (" +
                         "no INTEGER PRIMARY KEY, " +
                         "date DATE, " +
                         "content TEXT)";
            statement.executeUpdate(sql);

            sql = "INSERT INTO t1 (date, content)" +
                  "VALUES(DATETIME('NOW', 'LOCALTIME'), 'test');";
            statement.executeUpdate(sql);

            ResultSet resultSet = statement.executeQuery("SELECT * FROM t1;");
            while(resultSet.next()) {
                // here occurs exception ↓ :(
                Date date = resultSet.getDate("date");
                // here occurs exception ↑ :(
                String text = resultSet.getString("content");

                System.out.println(date + " " + text);
            }

            statement.close();
            connection.close();
        } catch(ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

异常解释是这样的。

Exception in thread "main" java.sql.SQLException: Error parsing time stamp
at org.sqlite.jdbc3.JDBC3ResultSet.getDate(JDBC3ResultSet.java:327)
at org.sqlite.jdbc3.JDBC3ResultSet.getDate(JDBC3ResultSet.java:346)
at com.planb.main.Main.main(Main.java:35)
Caused by: java.text.ParseException: Unparseable date: "2016-12-20 17:08:07" does not match (\p{Nd}++)\Q-\E(\p{Nd}++)\Q-\E(\p{Nd}++)\Q \E(\p{Nd}++)\Q:\E(\p{Nd}++)\Q:\E(\p{Nd}++)\Q.\E(\p{Nd}++)
at org.sqlite.date.FastDateParser.parse(FastDateParser.java:299)
at org.sqlite.date.FastDateFormat.parse(FastDateFormat.java:490)
at org.sqlite.jdbc3.JDBC3ResultSet.getDate(JDBC3ResultSet.java:324)
... 2 more

我找不到两个小时的解决方案。请帮帮我。：（

Answer 1

正如@Nurzhan建议的那样，您必须定义日期格式，然后使用它从String将日期解析为resultSet。一个例子：

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
while(resultSet.next()) {
    Date date = formatter.parse(resultSet.getString("date"));
    String text = resultSet.getString("content");

    System.out.println(date + " " + text);
}

输出将是：

12月20日星期二11:24:40 EET 2016测试

SQLite / java.text.ParseException的SQL查询：无法解析的日期

1 个答案: