java如何以列方式读取数据并将其作为列保存在mysqldb中
大家好,我试图从文本文件中读取数据,该文件包含c1、c2、c3等数据列,我必须从文本文件中读取这些列,我必须将这些列保存在MySQL数据库中,作为c1、c2、c3列,但c1列数据类型int、c1列数据类型date、c1列数据类型time
class ReadFile
{
public String[] readLines(String filename) throws IOException
{
FileReader fileReader = new FileReader(filename);
BufferedReader bufferedReader = new BufferedReader(fileReader);
List<String> lines = new ArrayList<String>();
String line = null;
while ((line = bufferedReader.readLine()) != null)
{
lines.add(line);
}
bufferedReader.close();
return lines.toArray(new String[lines.size()]);
}
}
public class Test {
public static void main(String[] args) {
ReadFile rf = new ReadFile();
// The text file location of your choice
String filename = "D://downloads//1_attlog.txt";
try
{
String[] lines = rf.readLines(filename);
for (String line : lines)
{
System.out.println(line);
}
}
catch(IOException e)
{
// Print out the exception that occurred
System.out.println("Unable to create "+filename+": "+e.getMessage());
}
}
}
测试JDBC
public class TestJDBC {
public static Connection getConnection() throws Exception {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/kallayyaDB";
String username = "root";
String password = "root";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public static void main(String[] args) throws Exception {
Connection conn = null;
PreparedStatement pstmt = null;
try {
conn = getConnection();
String query = "insert into testTable(deptnum, deptname, deptloc) values(?, ?, ?)";
pstmt = conn.prepareStatement(query); // create a statement
pstmt.setInt(1, 1); // set input parameter 1
pstmt.setString(2, "deptname"); // set input parameter 2
pstmt.setString(3, "deptLocation"); // set input parameter 3
pstmt.executeUpdate(); // execute insert statement
} catch (Exception e) {
e.printStackTrace();
} finally {
pstmt.close();
conn.close();
}
}
}
# 1 楼答案
循环部分
现在,您可以使用c[0]、c[1]、c[2]准备查询,大小为3,正如您所提到的,只有3列,我使用的是假设每列的间距为1。要从字符串转换日期和时间,你可以在谷歌上搜索