Question

如何从java中删除访问记录？我尝试了以下但它似乎不起作用。

public void Delete() throws SQLException {
  st.executeUpdate("DELETE FROM [AssignmentDetails] WHERE ([Entry Date],[Project ID],[Employee],[Hours Worked],[Firm Deadline],[Description of Assignment],[Additional Details],[ID]) = ('" + AbstractVariables.getEntryDate() + "','" + AbstractVariables.getProjectID() + "','" + AbstractVariables.getEmployee() + "','" + AbstractVariables.getHoursWorked() + "','" + AbstractVariables.getFirmDeadline() + "','" + AbstractVariables.getDescription() + "','" + AbstractVariables.getAdditionalDetails() + "','"+AbstractVariables.getID() + "')");
}

Answer 1

try {
    Connection con;
    Statement stmt;
        String url = "jdbc:odbc:GameData.mdb";
    // DATABASE CONNECTION MAGIC :-)
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    con = DriverManager.getConnection(url, "user", "password");
    stmt = con.createStatement();
    // DELETE SOME SOME STUDENT DATA (RARELY USED IN GOOD PRACTICE)
    stmt.executeUpdate("delete from students where phone = '000-0000'");

    // DATABASE CLOSE/CLEANUP
    stmt.close();
    con.close();
}
catch(Exception e) {
    e.printStackTrace();
}

Answer 2

您应该使用JDBC进行参数化查询，而不是将其全部放入一个大字符串

PreparedStatement st = connection.createStatement（“DELETE FROM [AssignmentDetails] WHERE [Entry Date] =？，[Project ID] = ?, etc ...）;

然后在预准备语句上设置参数，然后执行它

从java中删除访问记录

2 个答案: