java 代码创建的 csv 正在将所有数据写入同一行

Question

这是一个 beanshell 代码，所以可能看起来有些东西对于 java 开发人员来说很奇怪。 emailFileAttachment 函数是一个 sailpoint API，我正在使用的一个工具。我的问题是我放入地图的数据被放在 excel 文件中的一行中。我放入地图的 header ("Application, Num_entitlement") 没有打印在 CSV 文件的第一行。谁能帮帮我。这是我的代码：

import sailpoint.object.Application;
import sailpoint.object.Identity;
import java.sql.Connection;
import java.sql.PreparedStatement;
import javax.sql.DataSource;
import java.sql.SQLException;
import sailpoint.server.Environment;
import javax.sql.DataSource;
import java.sql.ResultSet;
import sailpoint.api.SailPointContext;
import java.io.BufferedWriter;
import java.io.IOExceptoin;
import java.io.FileWriter;
import sailpoint.object.EmailTemplate;
import sailpoint.object.EmailOptions;
import java.io.File;
import java.io.FileInputStream;
import sailpoint.object.EmailFileAttachment;
import java.util.HashMap;
import sailpoint.tools.Util;

    String query = "SELECT app.name as application, count(*) as num_entitlements FROM spt_application as app, spt_identity_entitlement as ent WHERE app.id = ent.application GROUP BY app.name"; 
    HashMap info = new HashMap();
    info.put("Application ", "Num_Entitlement");
    PreparedStatement getEntitlement_Num = null;
    Connection conn = null;
    /*
    public static byte[] readFiletoByteArray(File file)   
        {      
            FileInputStream fileInputStream = null;      
            byte[] byteFile = new byte[(int) file.length()];      
            try      
            {              
                fileInputStream = new FileInputStream(file);         
                fileInputStream.read(byteFile);         
                fileInputStream.close();         
            }      
            catch (Exception e)      
            {         
                e.printStackTrace();      
            }      
            return byteFile;   
        } 
    */

    try{
        // Prepared Statements 
        Environment e = Environment.getEnvironment();
        DataSource src = e.getSpringDataSource();
        //System.out.println("DataSource: " + src.toString());
        conn = src.getConnection();
        //System.out.println("Connection: " + conn);
        getEntitlement_Num = conn.prepareStatement(query);
        ResultSet rs = getEntitlement_Num.executeQuery();
        //System.out.println("starting RS");
        while(rs.next()) {
                String appName = rs.getString("application");
                int no_ent = rs.getInt("num_entitlements");
                info.put(appName , no_ent); 
            }
                System.out.println("finished RS");
        }catch(SQLException e){
            log.error( e.toString());
        }  finally {
            if (getEntitlement_Num!= null) { 
                getEntitlement_Num.close(); 
            }
            if(conn != null) {
                conn.close();
               }
            } 
        //I am using sailpoint APIs for the code below. 
                    String emailDest = "//email address here";
        EmailTemplate et = new EmailTemplate();
        et.setFrom("//email address here");
        et.setBody("Please find an attached CSV file that has the list of all applications in IIQ and their number of Entitlements");
        et.setTo(emailDest);
        et.setSubject("Entitlement count for each application in IIQ");
        EmailOptions ops = new EmailOptions(emailDest,null);
        String strInfo = Util.mapToString(info);
        byte[] fileData = strInfo.getBytes();
        EmailFileAttachment attachment = new EmailFileAttachment( "EntitlementCount.csv", EmailFileAttachment.MimeType.MIME_CSV, fileData );
        ops.addAttachment(attachment);
        context.sendEmailNotification(et, ops);
        //System.out.println("email sent");
        return "Success";

Answer 1

您应该在与记录迭代相同的循环中使用 StringBuilder，然后从 String 构建器制定附件。

我认为 Utility.MapToString 与 chashma 是根本原因。

Answer 2

info 是一个 HashMap，这意味着不能保证您可以按照输入的顺序提取数据。因此您的 header "Application" 可能在 CSV 文件中不排在第一位。相反，使用维护顺序的东西，例如 Tuple objects 的 ArrayList （您自己编写的包含两个字符串变量的 class）。

Util.mapToString(info) 是如何工作的？我们需要查看它以便调查换行问题。

Answer 3

Util.mapToString() 只会将映射转换为字符串。尝试将您的 collection 更改为 list of list{app, count} 和遍历列表以生成字符串。 Util.listToCsv() 或 Util.listToQuotedCsv() 方法将有助于准备 csv 字符串。

希望对您有所帮助。

java 代码创建的 csv 正在将所有数据写入同一行

csv created by java code is writing all the data in the same row

java

beanshell

sailpoint