Java – Eclipse从SQL查询到Excel

从每个返回的logging中获取我希望第5行的SQL查询的结果。

我想将数据导出到Excel电子表格中，从第二行开始（我有标题）。

我的SQL逻辑显然是现在，因为我得到的第一个结果增加了十三倍的行和列，虽然它是正确的第二行开始，只出去了13列。 第二个结果以这种方式重复，每个连续的结果也一样。

（rs.next（））{for（int i = 0; i <13; i ++）{ 

package process; import java.util.Scanner; import java.io.*; import java.sql.*; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFCell; public class Sec_Completions { public static void main(String[] args) { Sec_Completions obj_Sec_Completions=new Sec_Completions(); obj_Sec_Completions.Check_Data(); } public void Check_Data() { Scanner scanner = new Scanner(System.in); System.out.println("Enter the beginning date of completion YYYY/MM/DD"); String doc = scanner.nextLine(); doc = doc + " 00:00"; System.out.println("Date is" + " " + doc); final String sql = "SELECT DISTINCT wp_grassblade_completions.user_id, wp_grassblade_completions.status, wp_grassblade_completions.content_id, wp_usermeta.meta_key, CASE WHEN meta_value = 'male' THEN 'M' WHEN meta_value = 'female' THEN 'F' WHEN meta_value = 'Louisiana' THEN 'LA' ELSE meta_value END AS '1', wp_usermeta.meta_value, wp_usermeta.user_id, wp_grassblade_completions.timestamp\r\n" + "FROM wp_grassblade_completions \r\n" + "INNER JOIN wp_usermeta ON wp_grassblade_completions.user_id = wp_usermeta.user_id\r\n" + "WHERE wp_grassblade_completions.timestamp >= ? AND meta_key IN ('mepr_full_name', 'mepr_address', 'mepr_city', 'mepr_state', 'mepr_zip_code', 'mepr_home_phone_with_area_code', \r\n" + " 'mepr_drivers_license_or_id', 'mepr_id_state', 'mepr_LAst_four_of_social_security_number', 'mepr_date_of_birth_mmddyyyy', 'mepr_sex_mf', 'mepr_height', 'mepr_weight') AND content_id IN ('1575, 642, 1580') \r\n" + "ORDER BY wp_grassblade_completions.timestamp, content_id, wp_usermeta.user_id"; Class.forName("com.mysql.jdbc.Driver"); Connection connection=DriverManager.getConnection("jdbc:mysql://wpengine.com:3306/wp_database","user", "passsword"); PreparedStatement ps =null; ps=connection.prepareStatement(sql); ps.setString(1, doc); Statement st = connection.createStatement(); ResultSet rs = ps.executeQuery(); XSSFWorkbook wb = new XSSFWorkbook(); XSSFSheet sheet = wb.createSheet("Security"); XSSFRow rowhead = sheet.createRow((short) 0); int index = 1; while (rs.next()) { for (int i = 0; i < 13; i++) { XSSFRow row = sheet.createRow((short) index); row.createCell((short) i).setCellValue(rs.getString(5)); index++; } } FileOutputStream fileOut = new FileOutputStream("D://OneDrive//ABSEC//ATC_Reporting//expdata1.xlsx"); wb.write(fileOut); fileOut.close(); System.out.println("Data is saved in excel file."); rs.close(); connection.close(); } catch (Exception e) { System.out.println(e); }

预期成绩

实际结果

再次编辑

尝试这样的事情： 

 // META_KEY values, in the order that the columns should be. This should be a // private static final outside of in the class, along with the query's text... String[] keys = { "mepr_full_name", "mepr_address", "mepr_city", "mepr_state", "mepr_zip_code", "mepr_home_phone_with_area_code", "mepr_drivers_license_or_id", "mepr_id_state", "mepr_LAst_four_of_social_security_number", "mepr_date_of_birth_mmddyyyy", "mepr_sex_mf", "mepr_height", "mepr_weight" }; // Running thru the ResultSet short index = 1; while ( rs.next() ) { XSSFRow row = sheet.createRow( index ); String key = rs.getString(4); // meta_key String value = rs.getString( 5 ); // meta_value for ( short i = 0; i < keys.length; ++i ) { if ( keys[i].equals( key)) { // Retrieving cell, creating if not exists XSSFCell cell = row.getCell( i, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK ); // if the cell is used, increment index o get to the next row if ( cell.getCellTypeEnum() != CellType.BLANK ) ++index; // Set the value cell.setCellValue( value ); // No need to walk thru the rest of the array... break; } } }

这只适用于，如果有任何“下一行”不是以在前一行中没有值的列开始的话。
出于这个原因，你也应该添加meta_key到ORDER BY子句…
随着一些额外的清理，像这样的东西： 

 SELECT DISTINCT wpgc.user_id, wpgc.status, wpgc.content_id, wpu.meta_key, CASE wpu.meta_value WHEN 'male' THEN 'M' WHEN 'female' THEN 'F' WHEN 'Louisiana' THEN 'LA' ELSE wpu.meta_value END AS '1', wpu.user_id, wpgc.timestamp FROM wp_grassblade_completions AS wpgc JOIN wp_usermeta AS wpu ON wpgc.user_id = wpu.user_id WHERE wpgc.timestamp >= ? AND wpu.meta_key IN ('mepr_full_name', 'mepr_address', 'mepr_city', 'mepr_state', 'mepr_zip_code', 'mepr_home_phone_with_area_code', 'mepr_drivers_license_or_id', 'mepr_id_state', 'mepr_LAst_four_of_social_security_number', 'mepr_date_of_birth_mmddyyyy', 'mepr_sex_mf', 'mepr_height', 'mepr_weight') AND content_id IN ('1575, 642, 1580') ORDER BY wpgc.timestamp, wpgc.content_id, wpu.user_id, wpu.meta_key
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