知识大全 Groovy高效编程—生成Oracle表结构信息文档

Posted 2022-07-19 知

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　　利用Groovy对数据库进行操作是极其方便的有时为了熟悉数据库中的表需要将表结构导出并保存为EXCEL格式

　　下面所展示的源代码就能够很好的满足我们的需求 (这段代码依赖jxl和Oracle的jdbc驱动)

　　功能保持不变的条件下代码做了一些小调整利用Groovy中的强大特性Mixin 使代码更优雅

　　导出效果

　　　　conf properties 　　filename=table_structures xls 　　tables to export=% 　　column width= 　　url=jdbc:oracle:thin:@ : :orcl 　　user=DANIEL 　　password= 　　driver=oracle jdbc driver OracleDriver 　　GroovySql groovy 　　/* 　　* Copyright the original author or authors 　　* 　　* Licensed under the Apache License Version (the License ); 　　* you may not use this file except in pliance with the License 　　* You may obtain a copy of the License at 　　* 　　* 　　* Unless required by applicable law or agreed to in writing sofare 　　* distributed under the License is distributed on an AS IS BASIS 　　* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied 　　* See the License for the specific language governing permissions and 　　* limitations under the License 　　* 　　* Auth 　　*/ 　　import groovy sql Sql 　　import jxl * 　　import jxl write * 　　Properties properties = new Properties(); 　　properties load( new FileInputStream( conf properties )); 　　def filename = properties getProperty( filename ) 　　def tablesToExport = properties getProperty( tables to export ) 　　def columnWidth = properties getProperty( column width ) 　　def url = properties getProperty( url ) 　　def user = properties getProperty( user ) 　　def password = properties getProperty( password ) 　　def driver = properties getProperty( driver ) 　　def sql = Sql newInstance(url user password driver) 　　def sqlStmt = 　　select 　　a table_name 　　lumn_name 　　(select 　　nstraint_type 　　from 　　all_constraints d 　　all_cons_columns e 　　where 　　c owner = d owner and 　　d owner = e owner and 　　c table_name = d table_name and 　　d table_name = e table_name and 　　lumn_name = lumn_name and 　　nstraint_name = nstraint_name and 　　nstraint_type = P and 　　rownum = 　　) as constraint_type 　　a data_type 　　a data_length 　　a data_precision 　　a data_scale 　　a nullable 　　a data_default 　　ments 　　ments as tab_ments 　　from 　　all_tab_columns a 　　all_col_ments b 　　all_tab_ments c 　　where 　　a owner = b owner and 　　b owner = c owner and 　　a table_name = b table_name and 　　b table_name = c table_name and 　　lumn_name = lumn_name and 　　a table_name like ? and 　　a owner = ? 　　　　Map tables = new HashMap() 　　sql eachRow(sqlStmt [tablesToExport user]) row > 　　Map column = new HashMap() 　　column put( column_name lumn_name); 　　column put( constraint_type nstraint_type); 　　column put( data_type row data_type); 　　column put( data_length row data_length); 　　column put( data_precision row data_precision); 　　column put( data_scale row data_scale); 　　column put( nullable row nullable); 　　column put( data_default row data_default); 　　column put( ments ments); 　　String tableName = row table_name 　　String tableComments = row tab_ments 　　Set columns = tables get(tableName) ?lumns 　　if ( null == columns) 　　columns = new HashSet(); 　　columns << column 　　tables put(tableName [tableComments:tableComments columns:columns]) 　　 else 　　columns << column 　　　　　　println to export table structures 　　class WritableSheetCategory 　　static insertRow(WritableSheet writableSheet List row int x int y) 　　row eachWithIndex col i > 　　Label cell = new Label(x + i y col) 　　writableSheet addCell(cell) 　　　　　　　　WritableWorkbook writableWorkBook = 　　Workbook createWorkbook( 　　new File(filename)) 　　WritableSheet writableSheet = writableWorkBook createSheet( 第一页 ) 　　WritableFont writableFontForTableName = 　　new WritableFont(WritableFont TIMES WritableFont BOLD) 　　WritableCellFormat writableCellFormatForTableName = 　　new WritableCellFormat(writableFontForTableName) 　　// writableCellFormatForTableName setAlignment(jxl format Alignment CENTRE) 　　writableCellFormatForTableName setVerticalAlignment(jxl format VerticalAlignment CENTRE) 　　WritableFont writableFontForTableComments = 　　new WritableFont(WritableFont TIMES WritableFont NO_BOLD) 　　WritableCellFormat writableCellFormatForTableComments = 　　new WritableCellFormat(writableFontForTableComments) 　　// writableCellFormatForTableComments setAlignment(jxl format Alignment CENTRE) 　　writableCellFormatForTableComments setVerticalAlignment(jxl format VerticalAlignment CENTRE) 　　int line = 　　List titleRow = [ 　　表名表注释字段名称是否主键字段类型字段长度整数位数小数位数允许空值缺省值字段注释　　] 　　try 　　columnWidth = Integer parseInt(columnWidth) 　　 catch (Exception e) 　　columnWidth = 　　System err println(e getMessage()) 　　　　for ( int i = ; i < titleRow size(); i ++ ) 　　writableSheet setColumnView(i columnWidth) 　　　　use (WritableSheetCategory) 　　writableSheet insertRow(titleRow line ++ ) 　　　　tables each tableName tableInfo > 　　String tableComments = tableInfo tableComments 　　Set columns = lumns 　　Label tableNameCell = new Label( line tableName writableCellFormatForTableName) 　　writableSheet addCell(tableNameCell) 　　Label tableCommentsCell = new Label( line tableComments ? + tableComments : writableCellFormatForTableComments) 　　writableSheet addCell(tableCommentsCell) 　　columns each column > 　　List row = [ 　　lumn_name ? + lumn_name : 　　nstraint_type ? + nstraint_type : 　　column data_type ? + column data_type : 　　column data_length ? + column data_length : 　　column data_precision ? + column data_precision : 　　column data_scale ? + column data_scale : 　　column nullable ? + column nullable : 　　column data_default ? + column data_default : 　　ments ? + ments : 　　] 　　use (WritableSheetCategory) 　　writableSheet insertRow(row line ++ ) 　　　　　　rgeCells( line columns size() line ) 　　rgeCells( line columns size() line ) 　　line += 　　　　writableWorkBook write(); 　　writableWorkBook close(); 　　println done!

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