[功能集锦] 002 - mysql查询数据库字典+导出+样式一键整合至excel

SELECT pretab.TABLE_NAME AS 表名,pretab.TABLE_COMMENT AS 表释义,precol.COLUMN_NAME AS 字段名,precol.COLUMN_TYPE AS 字段类型,precol.COLUMN_DEFAULT AS 字段默认值,precol.COLUMN_COMMENT AS 表字段释义 FROM information_schema.`TABLES` AS pretab RIGHT JOIN information_schema.`COLUMNS` AS precol ON precol.TABLE_NAME=pretab.TABLE_NAME WHERE pretab.TABLE_SCHEMA ="此处填写库名";

  1 import java.io.BufferedReader;
  2 import java.io.FileInputStream;
  3 import java.io.FileOutputStream;
  4 import java.io.InputStreamReader;
  5 
  6 import org.apache.poi.hssf.usermodel.HSSFCell;
  7 import org.apache.poi.hssf.usermodel.HSSFRow;
  8 import org.apache.poi.hssf.usermodel.HSSFSheet;
  9 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 10 import org.apache.poi.ss.util.CellRangeAddress;
 11 
 12 /**
 13  * 重新整合数据库导出的文件,形成可视化的数据库字典
 14  * 
 15  * @author ruran
 16  * @since 2019年7月4日 下午3:25:13
 17  */
 18 public class reArrangeFromSQLtxt {
 19 
 20     /*
 21      * 导出的数据来源 SELECT pretab.TABLE_NAME AS 表名,pretab.TABLE_COMMENT AS 表释义,
 22      * precol.COLUMN_NAME AS 字段名,precol.COLUMN_TYPE AS 字段类型,
 23      * precol.COLUMN_DEFAULT AS 字段默认值,precol.COLUMN_COMMENT AS 表字段释义 FROM
 24      * information_schema.`TABLES` AS pretab RIGHT JOIN
 25      * information_schema.`COLUMNS` AS precol ON
 26      * precol.TABLE_NAME=pretab.TABLE_NAME WHERE pretab.TABLE_SCHEMA ="此处填写库名";
 27      */
 28     public static void main(String[] args) {
 29         String url = "F:\\2-ME\\中心+部门\\1-scrs学习整理区\\数据库整理 - 暂划区\\";
 30         reArrangeToExcelFromSQLtxt(url, "preScrssit", "@");
 31     }
 32 
 33     /**
 34      * 整理出数据导入到excel中
 35      * 
 36      * @author ruran
 37      * @since 2019年7月22日 下午2:06:27
 38      * @param url
 39      * @param fileName
 40      * @param splitStr
 41      */
 42     private static void reArrangeToExcelFromSQLtxt(String url, String fileName, String splitStr) {
 43 
 44         String fileType = ".txt";
 45         String forFileName = fileName + "_bak";
 46         String forFileType = ".xls";
 47 
 48         try (FileInputStream fis = new FileInputStream(url + fileName + fileType);
 49                 InputStreamReader isr = new InputStreamReader(fis);
 50                 BufferedReader br = new BufferedReader(isr);
 51 
 52                 FileOutputStream fos = new FileOutputStream(url + forFileName + forFileType);) {
 53 
 54             String readLine = "";
 55             String tableName = "";
 56             String tableComment = "";
 57             HSSFWorkbook currentWorkbook = new HSSFWorkbook();
 58             HSSFSheet currentSheet = currentWorkbook.createSheet("数据库字典");
 59             HSSFRow currentRow = null;
 60             HSSFCell currentCell = null;
 61             int rowIndex = -1;
 62             while (isNotBlank((readLine = br.readLine()))) {
 63                 String[] lineSplit = readLine.split(splitStr);
 64                 int lineSplitLenght = lineSplit.length;
 65                 String currentTableName = "";
 66                 if (lineSplitLenght > 0) {
 67                     currentTableName = lineSplit[0];
 68                 }
 69                 if (currentTableName.equals(tableName)) {
 70                     currentRow = currentSheet.createRow(++rowIndex);
 71                     // 输出列数据
 72                     for (int i = 2; i < 6; i++) {
 73                         currentCell = currentRow.createCell((i - 2));
 74                         if (lineSplitLenght > i) {
 75                             currentCell.setCellValue(lineSplit[i]);
 76                         }
 77                     }
 78                     // 开启下次循环
 79                     continue;
 80                 }
 81                 String currentTableComment = "";
 82                 if (lineSplitLenght > 1) {
 83                     currentTableComment = lineSplit[1];
 84                 }
 85                 // 表名和表注释赋值
 86                 tableName = currentTableName;
 87                 tableComment = currentTableComment;
 88                 // 输入空行
 89                 currentSheet.createRow(++rowIndex);
 90                 // 切表-表名（注释）
 91                 currentRow = currentSheet.createRow(++rowIndex);
 92                 for (int i = 0; i < 4; i++) {
 93                     currentCell = currentRow.createCell(i);
 94                     if (i == 0) {
 95                         currentCell.setCellValue(tableName + "(" + tableComment + ")");
 96                     }
 97                 }
 98                 CellRangeAddress region = new CellRangeAddress(rowIndex, rowIndex, 0, 3);
 99                 currentSheet.addMergedRegion(region);
100 
101                 // 切表-标题栏
102                 currentRow = currentSheet.createRow(++rowIndex);
103                 currentCell = currentRow.createCell(0);
104                 currentCell.setCellValue("列名");
105                 currentCell = currentRow.createCell(1);
106                 currentCell.setCellValue("类型");
107                 currentCell = currentRow.createCell(2);
108                 currentCell.setCellValue("默认值");
109                 currentCell = currentRow.createCell(3);
110                 currentCell.setCellValue("释义");
111                 currentRow = currentSheet.createRow(++rowIndex);
112                 // 切表第一列
113                 for (int i = 2; i < 6; i++) {
114                     currentCell = currentRow.createCell((i - 2));
115                     if (lineSplitLenght > i) {
116                         currentCell.setCellValue(lineSplit[i]);
117                     }
118                 }
119             }
120             currentWorkbook.write(fos);
121         } catch (Exception e) {
122             e.printStackTrace();
123         }
124     }
125 
126     /**
127      * 字符串判空
128      * 
129      * @author ruran
130      * @since 2019年7月23日 下午2:11:28
131      * @param str
132      * @return
133      */
134     private static boolean isNotBlank(String str) {
135         if (null == str) {
136             return false;
137         }
138         if (str.trim().length() == 0) {
139             return false;
140         }
141         return true;
142     }
143 
144 }