如何将csv中的值插入Java中的数据库 [英] How to insert values from csv into database in java

问题描述

我已经尝试了以下代码来拆分csv值，现在如何将其插入到数据库中?是否将值保存到单独的变量中以匹配列名?我不知道.

I have tried the following code to split the csv values and now how do insert it in to DB? Do I have save the values in to separate variables to match column names? I am unable to figure out.

注意:我现在不想使用任何csv解析器.我只想手动做

Note: I don't want to use any csv parser right now. I just want to do it manually

public static void main(String[] args) throws IOException, ClassNotFoundException, SQLException {
        String name;
        String email;
        String phone;
        String ID;

        Connection con = OracleDBConnection.getConnection();
        String query = "Insert into NEWSTUDENT values(?,?,?,?)";
                PreparedStatement st = con.prepareStatement();
                st.executeUpdate(query);        

        try {
            BufferedReader bReader = new BufferedReader(new FileReader("1000rows.csv"));

            while (bReader != null) {
                String read;
                try {
                    read = bReader.readLine();
                    if (read != null) 
                    {
                        String[] array = read.split(",+");
                        for(String result:array)
                        {
                            System.out.println(result);
                        }
                    } 
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                finally
                {
                   if (bReader == null) 
                    {
                        bReader.close();
                    }
                }
            }
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
    }
}

输出:

1Kiriti
[e-mail]
880789939

数据库中的列名称:

Name Email Phone ID

推荐答案

使用Parepared语句并在while循环中构建查询并执行它.有关准备好的声明"的更多信息，请检查选中此链接

Use Parepared statement and build a query in while Loop and execute it. For more on Prepared Statement please check Check this link

String sql = " INSERT INTO TABLE_(name,email,phone,id) VALUES(?,?,?,?) ";


try { 
        BufferedReader bReader = new BufferedReader(new FileReader("1000rows.csv"));
        String line = ""; 
        while ((line = bReader.readLine()) != null) {
            try {

                if (line != null) 
                {
                    String[] array = line.split(",+");
                    for(String result:array)
                    {
                        System.out.println(result);
 //Create preparedStatement here and set them and excute them
                PreparedStatement ps = yourConnecionObject.createPreparedStatement(sql);
                 ps.setString(1,str[0]);
                 ps.setString(2,str[1]);
                 ps.setString(3,str[2]);
                 ps.setString(4,strp[3])
                 ps.excuteUpdate();
                 ps. close()
   //Assuming that your line from file after split will folllow that sequence

                    }
                } 
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            finally
            {
               if (bReader == null) 
                {
                    bReader.close();
                }
            }
        }
    } catch (FileNotFoundException ex) {
        ex.printStackTrace();
    }

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