Java を使用して MySQL データベース内のすべてのテーブルを表示しますか?

ここでは、Java を使用して MySQL データベース内のすべてのテーブルを表示する方法を見ていきます。 MySQL で show コマンドを使用すると、MySQL データベース内のすべてのテーブルを取得できます。

データベースが「test」であると仮定します。 Java コードは次のとおりで、データベース「test」内のすべてのテーブル名を表示します。

Java コードは次のとおりです。ここでは、MySQL と Java の間の接続が確立されています -

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.DatabaseMetaData;

public class GetAllTables {
   public static void main(String[] args) throws SQLException {
      Connection conn = null;
      try {
         try {
            Class.forName("com.mysql.jdbc.Driver");
         } catch (Exception e) {
            System.out.println(e);
         }
         conn = (Connection) DriverManager.getConnection("jdbc:mysql://localhost/test", "Manish", "123456");
         System.out.println("Connection is created succcessfully:");
      } catch (Exception e) {
         System.out.println(e);
      }
      ResultSet rs = null;
      DatabaseMetaData meta = (DatabaseMetaData) conn.getMetaData();
      rs = meta.getTables(null, null, null, new String[] {
         "TABLE"
      });
      int count = 0;
      System.out.println("All table names are in test database:");
      while (rs.next()) {
         String tblName = rs.getString("TABLE_NAME");
         System.out.println(tblName);
         count++;
      }
      System.out.println(count + " Rows in set ");
   }
}

以下は、データベース テストのすべてのテーブルを示す出力です -

Wed Dec 12 14:55:28 IST 2018 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL = false, or set useSSL = true and provide truststore for server certificate verification.
Connection is created succcessfully:
All table names are in test database:
add30minutesdemo
addcolumn
addoneday
agecalculatesdemo
aliasdemo
allcharacterbeforespace
allownulldemo
appendingdatademo
autoincrementdemo
betweendatedemo
bigintandintdemo
bigintdemo
bookdatedemo
changecolumnpositiondemo
changeenginetabledemo
charsetdemo
concatenatetwocolumnsdemo
constraintdemo
cumulativesumdemo
currentdatetimedemo
customers
dateasstringdemo
dateformatdemo
dateinsertdemo
datesofoneweek
datetimedemo
dayofweekdemo
decimaltointdemo
decrementdemo
defaultdemo
deleteallfromtable
deletemanyrows
destination
differencetimestamp
distinctdemo
employee
employeedesignation
findlowercasevalue
generatingnumbersdemo
gmailsignin
groupbytwofieldsdemo
groupmonthandyeardemo
highestidorderby
highestnumberdemo
ifnulldemo
increasevarchardemo
insert
insertignoredemo
insertwithmultipleandsigle
int11demo
intvsintanythingdemo
lasttwocharacters
likebinarydemo
likedemo
maxlengthfunctiondemo
moviecollectiondemo
myisamtoinnodbdemo
newtableduplicate
notequalsdemo
nowandcurdatedemo
nthrecorddemo
nullandemptydemo
orderbycharacterlength
orderbynullfirstdemo
orderindemo
originaltable
parsedatedemo
passinganarraydemo
persons
prependstringoncolumnname
pricedemo
queryresultdemo
replacedemo
rowexistdemo
rowpositiondemo
rowwithsamevalue
safedeletedemo
searchtextdemo
selectdataonyearandmonthdemo
selectdistincttwocolumns
selectdomainnameonly
sha256demo
skiplasttenrecords
sortcolumnzeroatlastdemo
storedproctable
stringreplacedemo
stringtodate
student
studentdemo
studentmodifytabledemo
studenttable
subtract3hours
temporarycolumnwithvaluedemo
timetosecond
timetoseconddemo
toggledemo
toogledemo
truncatetabledemo
updatealldemo
updatevalueincrementally
wheredemo
wholewordmatchdemo
zipcodepadwithzerodemo

103 Rows in set

クロスチェックするには、MySQL show コマンドを使用して、データベース "test" 内のすべてのテーブル。クエリは次のとおりです -

mysql> use test;
Database changed
mysql> show tables;

次は出力です -

+------------------------------+
| Tables_in_test               |
+------------------------------+
| add30minutesdemo             |
| addcolumn                    |
| addoneday                    |
| agecalculatesdemo            |
| aliasdemo                    |
| allcharacterbeforespace      |
| allownulldemo                |
| appendingdatademo            |
| autoincrementdemo            |
| betweendatedemo              |
| bigintandintdemo             |
| bigintdemo                   |
| bookdatedemo                 |
| changecolumnpositiondemo     |
| changeenginetabledemo        |
| charsetdemo                  |
| concatenatetwocolumnsdemo    |
| constraintdemo               |
| cumulativesumdemo            |
| currentdatetimedemo          |
| customers                    |
| dateasstringdemo             |
| dateformatdemo               |
| dateinsertdemo               |
| datesofoneweek               |
| datetimedemo                 |
| dayofweekdemo                |
| decimaltointdemo             |
| decrementdemo                |
| defaultdemo                  |
| deleteallfromtable           |
| deletemanyrows               |
| destination                  |
| differencetimestamp          |
| distinctdemo                 |
| employee                     |
| employeedesignation          |
| findlowercasevalue           |
| generatingnumbersdemo        | 
| gmailsignin                  |
| groupbytwofieldsdemo         |
| groupmonthandyeardemo        |
| highestidorderby             |
| highestnumberdemo            |
| ifnulldemo                   |
| increasevarchardemo          |
| insert                       |
| insertignoredemo             |
| insertwithmultipleandsigle   |
| int11demo                    |
| intvsintanythingdemo         |
| lasttwocharacters            |
| likebinarydemo               |
| likedemo                     |
| maxlengthfunctiondemo        |
| moviecollectiondemo          |
| myisamtoinnodbdemo           |
| newtableduplicate            |
| notequalsdemo                |
| nowandcurdatedemo            |
| nthrecorddemo                |
| nullandemptydemo             |
| orderbycharacterlength       |
| orderbynullfirstdemo         |
| orderindemo                  |
| originaltable                |
| parsedatedemo                |
| passinganarraydemo           |
| persons                      |
| prependstringoncolumnname    |
| pricedemo                    |
| queryresultdemo              |
| replacedemo                  |
| rowexistdemo                 |
| rowpositiondemo              |
| rowwithsamevalue             |
| safedeletedemo               |
| searchtextdemo               |
| selectdataonyearandmonthdemo |
| selectdistincttwocolumns     |
| selectdomainnameonly         |
| sha256demo                   |
| skiplasttenrecords           |
| sortcolumnzeroatlastdemo     |
| storedproctable              |
| stringreplacedemo            |
| stringtodate                 |
| student                      |
| studentdemo                  |
| studentmodifytabledemo       |
| studenttable                 |
| subtract3hours               |
| temporarycolumnwithvaluedemo |
| timetosecond                 |
| timetoseconddemo             |
| toggledemo                   |
| toogledemo                   |
| truncatetabledemo            |
| updatealldemo                |
| updatevalueincrementally     |
| wheredemo                    |
| wholewordmatchdemo           |
| zipcodepadwithzerodemo       |
+------------------------------+
103 rows in set (0.01 sec)

上でわかるように、すべて同じ結果が得られます。

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