最近在做编程工具，便于快速开发程序，用过太多框架，但是发觉只有自己制作代码工具才开发起来痛快。

这个类是用来读取oracle数据库表结构的，也包括列的注释，对于生成代码有很好的帮助。

1.[文件] OracleTable.java ~ 3KB     下载(72)

package db;

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.List;

/***

* 2014-07-21日：

* oracle数据库， 表结构查询 ，字段信息查询，字段注释查询

* 表字段查询 all_tab_columns

* 表字段注释查询 all_col_comments

* @author 王华荣

*

*/

public class OracleTable {

private static final String DRIVER_CLASS = "oracle.jdbc.driver.OracleDriver";

private static final String DATABASE_URL = "jdbc:oracle:thin:@192.168.1.10:1521:orcl";

private static final String DATABASE_USER = "dev";

private static final String DATABASE_PASSWORD = "dev";

private static Connection con = null;

public static Connection getConnection() {

try {

Class.forName(DRIVER_CLASS);

con=DriverManager.getConnection(DATABASE_URL,DATABASE_USER,DATABASE_PASSWORD);

return con;

} catch (Exception ex) {

System.out.println("2:"+ex.getMessage());

}

return con;

}

/***

* 打印test

* @throws SQLException

*/

public static void sysoutStrTablePdmCloumns(String Table,String Owner) throws SQLException{

getConnection();

List> columns = new ArrayList>();

try{

Statement stmt = con.createStatement();

String sql=

"select "+

" comments as \"Name\","+

" a.column_name \"Code\","+

" a.DATA_TYPE as \"DataType\","+

" b.comments as \"Comment\","+

" decode(c.column_name,null,'FALSE','TRUE') as \"Primary\","+

" decode(a.NULLABLE,'N','TRUE','Y','FALSE','') as \"Mandatory\","+

" '' \"sequence\""+

" from "+

" all_tab_columns a, "+

" all_col_comments b,"+

" ("+

" select a.constraint_name, a.column_name"+

" from user_cons_columns a, user_constraints b"+

" where a.constraint_name = b.constraint_name"+

" and b.constraint_type = 'P'"+

" and a.table_name = '"+Table+"'"+

" ) c"+

" where "+

" a.Table_Name=b.table_Name "+

" and a.column_name=b.column_name"+

" and a.Table_Name='"+Table+"'"+

" and a.owner=b.owner "+

" and a.owner='"+Owner+"'"+

" and a.COLUMN_NAME = c.column_name(+)" +

"order by a.COLUMN_ID";

System.out.println(sql);

ResultSet rs = stmt.executeQuery(sql);

while (rs.next()){

HashMap map = new HashMap();

map.put("Name", rs.getString("Name"));

map.put("Code", rs.getString("Code"));

map.put("DataType", rs.getString("DataType"));

map.put("Comment", rs.getString("Comment"));

map.put("Primary", rs.getString("Primary"));

map.put("Mandatory", rs.getString("Mandatory"));

columns.add(map);

}

}

catch (SQLException e){

e.printStackTrace();

}finally{

con.close();

}

}

public static void main(String[] args) throws SQLException{

sysoutStrTablePdmCloumns("CT_INFO_CONTRACT_BORROW","DEV");

}

}