oracle数据库自动生成数据库表结构文档(亲测有效)

 import java.awt.Color;
 import java.io.FileOutputStream;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;

 import com.lowagie.text.*;
 import com.lowagie.text.rtf.RtfWriter2;
 /**
  * 数据库文档生成器 Oracle版
  * itext-2.1.7.jar
  * itext-rtf-2.1.7.jar
  * @author cuiyj
  *
  */
 public class GenerateTableDoc {
     //键类型字典
     private static Map<String,String> keyType = new HashMap<String,String>();
     //需要导出的目标表
     private static List<String> targetTable = new ArrayList<String>();
     static{
         targetTable.add("COMMON_ADDRESS");//表名
         targetTable.add("L_USER");
     }
     //初始化jdbc
     static{
         try {
             keyType.put("ID", "主键");
 //            keyType.put("C", "Check");
             Class.forName("oracle.jdbc.OracleDriver");
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         }
     }
     //private static String url = "";//链接url
     private static String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";//链接url
     private static String username = "user"; //用户名.需要设置默认表空间哈
     private static String password = "user"; //密码
     private static String schema = "USER"; //目标数据库名
     //查询所有表的sql语句
     private static String sql_get_all_tables = "select a.TABLE_NAME,b.COMMENTS from user_tables a,user_tab_comments b WHERE a.TABLE_NAME=b.TABLE_NAME order by TABLE_NAME";    //查询所有字段的sql语句
     private static String sql_get_all_columns = "select T1.column_name,T1.data_type,T1.data_length,t2.comments,T1.NULLABLE,(select max(constraint_type)    from user_constraints x left join user_cons_columns y on x.constraint_name=y.constraint_name where x.table_name=t1.TABLE_NAME and y.COLUMN_NAME=T1.column_name)  from user_tab_cols t1, user_col_comments t2, user_tab_comments t3  where t1.TABLE_NAME=t2.table_name(+)  and t1.COLUMN_NAME=t2.column_name(+)  and t1.TABLE_NAME=t3.table_name(+)  and t1.TABLE_NAME='{table_name}' order by T1.COLUMN_ID ";
     public static void main(String[] args) throws Exception {
         //初始化word文档
         Document document = new Document(PageSize.A4);
         RtfWriter2.getInstance(document,new FileOutputStream("E:/word.doc"));
         document.open();
         //查询开始
         Connection conn = getConnection();
         //获取所有表
         List tables = getDataBySQL(sql_get_all_tables,conn);
         int i=1;
         for (Iterator iterator = tables.iterator(); iterator.hasNext();) {
             String [] arr = (String []) iterator.next();
             //循环获取字段信息
             String tableName = arr[0];
             if(targetTable.contains(tableName)){
                 System.out.print(i+".正在处理数据表-----------"+arr[0]);
                 addTableMetaData(document,arr,i);
                 List columns = getDataBySQL(sql_get_all_columns.replace("{table_name}", arr[0]),conn);
                 addTableDetail(document,columns);
                 addBlank(document);
                 System.out.println("...done");
                 i++;
             }
         }
         document.close();
         conn.close();
     }
     /**
      * 添加一个空行
      * @param document
      * @throws Exception
      */
     public static void addBlank(Document document)throws Exception{
         Paragraph ph = new Paragraph("");
         ph.setAlignment(Paragraph.ALIGN_LEFT);
         document.add(ph);
     }
     /**
      * 添加包含字段详细信息的表格
      * @param document
      * @param arr1
      * @param columns
      * @throws Exception
      */
     public static void addTableDetail(Document document,List columns)throws Exception{
         Table table = new Table(6);
         table.setWidth(100f);
         table.setBorderWidth(1);
         table.setBorderColor(Color.BLACK);
         table.setPadding(0);
         table.setSpacing(0);
         Cell cell1 = new Cell("序号");// 单元格
         cell1.setHeader(true);

         Cell cell2 = new Cell("列名");// 单元格
         cell2.setHeader(true);

         Cell cell3 = new Cell("类型");// 单元格
         cell3.setHeader(true);

         Cell cell4 = new Cell("长度");// 单元格
         cell4.setHeader(true);

         Cell cell5 = new Cell("键");// 单元格
         cell5.setHeader(true);

         Cell cell6 = new Cell("说明");// 单元格
         cell6.setHeader(true);
         //设置表头格式
         table.setWidths(new float[]{8f,30f,15f,8f,10f,29f});
         cell1.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell1.setBackgroundColor(Color.gray);
         cell2.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell2.setBackgroundColor(Color.gray);
         cell3.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell3.setBackgroundColor(Color.gray);
         cell4.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell4.setBackgroundColor(Color.gray);
         cell5.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell5.setBackgroundColor(Color.gray);
         cell6.setHorizontalAlignment(Cell.ALIGN_CENTER);
         cell6.setBackgroundColor(Color.gray);
         table.addCell(cell1);
         table.addCell(cell2);
         table.addCell(cell3);
         table.addCell(cell4);
         table.addCell(cell5);
         table.addCell(cell6);
         table.endHeaders();// 表头结束
         int x = 1;
         for (Iterator iterator = columns.iterator(); iterator.hasNext();) {
             String [] arr2 = (String []) iterator.next();
             Cell c1 = new Cell(x+"");
             Cell c2 = new Cell(arr2[0]);
             Cell c3 = new Cell(arr2[1]);
             Cell c4 = new Cell(arr2[2]);

             String key = keyType.get(arr2[5]);
             if(key==null)key = "";
             Cell c5 = new Cell(key);
             Cell c6 = new Cell(arr2[3]);
             c1.setHorizontalAlignment(Cell.ALIGN_CENTER);
             c2.setHorizontalAlignment(Cell.ALIGN_CENTER);
             c3.setHorizontalAlignment(Cell.ALIGN_CENTER);
             c4.setHorizontalAlignment(Cell.ALIGN_CENTER);
             c5.setHorizontalAlignment(Cell.ALIGN_CENTER);
             c6.setHorizontalAlignment(Cell.ALIGN_CENTER);
             table.addCell(c1);
             table.addCell(c2);
             table.addCell(c3);
             table.addCell(c4);
             table.addCell(c5);
             table.addCell(c6);
             x++;
         }
         document.add(table);
     }
     /**
      * 增加表概要信息
      * @param dcument
      * @param arr
      * @param i
      * @throws Exception
      */
     public static void addTableMetaData(Document dcument,String [] arr,int i) throws Exception{
         Paragraph ph = new Paragraph(i+". 表名: "+arr[0]+"        说明: "+(arr[1]==null?"":arr[1]));
         ph.setAlignment(Paragraph.ALIGN_LEFT);
         dcument.add(ph);
     }
     /**
      * 把SQL语句查询出列表
      * @param sql
      * @param conn
      * @return
      */
     public static List getDataBySQL(String sql,Connection conn){
         Statement stmt = null;
         ResultSet rs = null;
         List list = new ArrayList();
         try {
             stmt = conn.createStatement();
             rs = stmt.executeQuery(sql);
             while(rs.next()){
                 String [] arr = new String[rs.getMetaData().getColumnCount()];
                 for(int i=0;i<arr.length;i++){
                     arr[i] = rs.getString(i+1);
                 }
                 list.add(arr);
             }
         } catch (SQLException e) {
             e.printStackTrace();
         }finally{
             try {
                 if(rs!=null)rs.close();
                 if(stmt!=null)stmt.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
         return list;
     }
     /**
      * 获取数据库连接
      * @return
      */
     public static Connection getConnection(){
         try {
             return DriverManager.getConnection(url, username, password);
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return null;
     }
 }

 ------ 这是相关依赖
         <dependency>
             <groupId>com.lowagie</groupId>
             <artifactId>itext</artifactId>
             <version>2.1.7</version>
         </dependency>
         <dependency>
             <groupId>com.lowagie</groupId>
             <artifactId>itext-rtf</artifactId>
             <version>2.1.7</version>
         </dependency>