怎么获得数据库表结构

1，在注入时初始化这两个模板。

/**

* 注入数据源， 该数据源在Spring配置文件中配置

* 在注入时初始化这两个模板

* @param dataSource

* Method create author: yanwei

* Method create dateTime: 2011-11-2 下午03:43:13

* Method update author:

* Method update dateTime:

*/

@Resource

public void setDataSource(DataSource dataSource) {

this.dataSource = dataSource

jdbcTemplate = new JdbcTemplate(dataSource)

simpleJdbcTemplate = new SimpleJdbcTemplate(dataSource)

}

2，获取表结构信息。

1 /**

2 * 获取表结构信息

3 * @param tableName 表名

4 * @return

5 * @throws Exception

6 * Method create author: yanwei

7 * Method create dateTime: 2011-12-21 下午01:01:17

8 * Method update author:

9 * Method update dateTime:

10 */

11 public List<DsClientColumnInfo>getDsTableColumnInfo(String tableName) throws DataAccessFailureException{

12

13 ResultSet resultSet = null

14 Connection connection = null

15 java.util.List<DsClientColumnInfo>clientTableInfos = new ArrayList<DsClientColumnInfo>()

16 try {

17 connection = this.jdbcTemplate.getDataSource().getConnection()

18 //获得列的信息

19 resultSet = connection.getMetaData().getColumns(null, null, tableName, null)

20 while (resultSet.next()) {

21 //获得字段名称

22 String name = resultSet.getString("COLUMN_NAME")

23 //获得字段类型名称

24 String type = resultSet.getString("TYPE_NAME")

25 //获得字段大小

26 int size = resultSet.getInt("COLUMN_SIZE")

27 //获得字段备注

28 String remark = resultSet.getString("REMARKS")

29 DsClientColumnInfo info = new DsClientColumnInfo(null, null, null, name, remark, size, type, "false")

30 clientTableInfos.add(info)

31 }

32

33 //获得主键的信息

34 resultSet = connection.getMetaData().getPrimaryKeys(null, null, tableName)

35 while(resultSet.next()){

36 String primaryKey = resultSet.getString("COLUMN_NAME")

37 //设置是否为主键

38 for (DsClientColumnInfo dsClientColumnInfo : clientTableInfos) {

39 if(primaryKey != null &&primaryKey.equals(dsClientColumnInfo.getClientColumnCode()))

40 dsClientColumnInfo.setIsParmaryKey("true")

41 else

42 dsClientColumnInfo.setIsParmaryKey("false")

43 }

44 }

45

46 //获得外键信息

47 resultSet = connection.getMetaData().getImportedKeys(null, null, tableName)

48 while(resultSet.next()){

49 String exportedKey = resultSet.getString("FKCOLUMN_NAME")

50 //设置是否是外键

51 for (DsClientColumnInfo dsClientColumnInfo : clientTableInfos) {

52 if(exportedKey != null &&exportedKey.equals(dsClientColumnInfo.getClientColumnCode()))

53 dsClientColumnInfo.setIsImportedKey("true")

54 else

55 dsClientColumnInfo.setIsImportedKey("false")

56 }

57 }

58

59

60 } catch (Exception e) {

61 e.printStackTrace()

62 throw new RuntimeException("获取字段信息的时候失败，请将问题反映到维护人员。" + e.getMessage(), e)

63 } finally{

64 if(resultSet != null)

65 try {

66 resultSet.close()

67 } catch (SQLException e) {

68 e.printStackTrace()

69throw new DataAccessFailureException("关闭结果集resultSet失败。",e)

70 }finally{

71 if(connection != null)

72 try {

73 connection.close()

74 } catch (SQLException e) {

75 e.printStackTrace()

76throw new DataAccessFailureException("关闭连接connection失败。",e)

77 }

78 }

79 }

80

81 Set set = new HashSet()

82 set.addAll(clientTableInfos)

83 clientTableInfos.clear()

84 clientTableInfos.addAll(set)

85 return clientTableInfos

86 }

3，获得数据库中所有的表。

1 /**

2 * 获得数据库中所有的表

3 * @return

4 * Method create author: yanwei

5 * Method create dateTime: 2012-1-5 上午11:23:54

6 * Method update author:

7 * Method update dateTime:

8 * @throws SQLException

9 */

10 public Map<String, String>getDatabaseTables() throws DataAccessFailureException{

11 ResultSet resultSet = null

12 Connection connection = null

13 Map<String, String>map = new HashMap<String, String>()

14 try {

15 String[] types = {"TABLE"}

16 connection = this.jdbcTemplate.getDataSource().getConnection()

17 String databaseName = SynXmlAnalysis.getElementValueByName(DATABASE_NAME)

18 resultSet = connection.getMetaData().getTables(null, databaseName, null, types)

19 while(resultSet.next()){

20 String tableName = resultSet.getString("TABLE_NAME")

21 String remark = resultSet.getString("REMARKS")

22 map.put(tableName, remark)

23 }

24 } catch (SQLException e) {

25 e.printStackTrace()

26 throw new DataAccessFailureException(e)

27 }catch (Exception e) {

28 e.printStackTrace()

29 }finally{

30 if(resultSet != null)

31 try {

32 resultSet.close()

33 } catch (SQLException e) {

34 e.printStackTrace()

35throw new DataAccessFailureException("关闭结果集resultSet失败。",e)

36 }finally{

37 if(connection != null)

38 try {

39 connection.close()

40 } catch (SQLException e) {

41 e.printStackTrace()

42throw new DataAccessFailureException("关闭连接connection失败。",e)

43 }

44 }

45

46 }

47 return map

48 }

列出表(列)结构：

mysql<DESCRIBE tableName

mysql<DESCRIBE tableName columnName

mysql<DESC tableName

mysql<SHOW COLUMNS FROM tableName

% mysqlshow dbName tableName！

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