oracle实战技巧（九）通过java生成oracle/mysql文档

pom文件

        <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>

        <!-- 根据自身数据库驱动更改 -->
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc8</artifactId>
            <version>12.1.0.2.0</version>
        </dependency>

生成oracle

java文件

import java.awt.*;
import java.io.FileOutputStream;
import java.sql.*;
import java.util.*;
import java.util.List;

import com.lowagie.text.*;
import com.lowagie.text.rtf.RtfWriter2;

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("SINGLE_APARTMENT_USER");
        targetTable.add("SINGLE_APARTMENT_INFO");
        targetTable.add("AREA_ROOM_INFO");
        targetTable.add("HISTORY_LIVE_PEOPLE");
    }
    //初始化jdbc
    static{
        try {
            keyType.put("P", "主键");
//			keyType.put("C", "Check");
            Class.forName("oracle.jdbc.OracleDriver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
    private static String url = "jdbc:oracle:thin:@192.168.49.12:1521/orcl";//链接url
    //	private static String url = "jdbc:oracle:thin:@localhost:1521:orcl";//链接url
    private static String username = "earlywarning"; //用户名.需要设置默认表空间哈
    private static String password = "123"; //密码
    private static String schema = "earlywarning"; //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:/ew.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 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;
    }
}

生成mysql

更改上文查询sql

//查询所有表的sql语句  
    private static String sql_get_all_tables = "select table_name,TABLE_COMMENT from INFORMATION_SCHEMA.tables where TABLE_SCHEMA='"+schema+"' and TABLE_TYPE='BASE TABLE'";  
    //查询所有字段的sql语句  
    private static String sql_get_all_columns = "select column_name,data_type,character_octet_length,COLUMN_COMMENT,is_nullable,COLUMN_key from information_schema.`COLUMNS` where TABLE_NAME='{table_name}' and TABLE_SCHEMA='"+schema+"'";  

文章来源: baocl.blog.csdn.net，作者：小黄鸡1992，版权归原作者所有，如需转载，请联系作者。

原文链接：baocl.blog.csdn.net/article/details/111314610