利用Java如何实现导出oracle数据库中的表结构?很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
Java导出oracle表结构实例详解
最近用到的,因为plsql是收费的,不让用,找了很多方法终于发现了这个。
核心语句
SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.object_name), U.OBJECT_TYPE
FROM USER_OBJECTS U
where U.OBJECT_TYPE = 'TABLE'
or U.OBJECT_TYPE = 'VIEW'
or U.OBJECT_TYPE = 'INDEX'
or U.OBJECT_TYPE = 'PROCEDURE'
or U.OBJECT_TYPE = 'SEQUENCE'
or U.OBJECT_TYPE = 'TRIGGER'
order by U.OBJECT_TYPE desc
自己写的Java方法,未做封装。
package sql;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
public class Main {
private static final String TYPE_MARK = "-1";
private static String SQL =
"SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.object_name), U.OBJECT_TYPE " +
"FROM USER_OBJECTS U " +
"where U.OBJECT_TYPE = 'TABLE' " +
"or U.OBJECT_TYPE = 'VIEW' " +
"or U.OBJECT_TYPE = 'INDEX' " +
"or U.OBJECT_TYPE = 'PROCEDURE' " +
"or U.OBJECT_TYPE = 'SEQUENCE' " +
"or U.OBJECT_TYPE = 'TRIGGER' " +
"order by U.OBJECT_TYPE desc";
private static String URL = "jdbc:oracle:thin:@192.168.1.2:1521:orcl";
private static String USERNAME = "abc";
private static String PASSWORD = "abc";
private static String OUTFILE = "tables.sql";
/**
* @param args
* @throws Exception
* @throws
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
Properties properties = new Properties();
properties.load(new FileInputStream("config.properties"));
URL = properties.getProperty("url", URL);
USERNAME = properties.getProperty("username", USERNAME);
PASSWORD = properties.getProperty("password", PASSWORD);
OUTFILE = properties.getProperty("outfile", OUTFILE);
SQL = properties.getProperty("sql", SQL);
FileWriter fw = new FileWriter(OUTFILE);
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection(URL, USERNAME, PASSWORD);
Statement statement = con.createStatement();
ResultSet rs = statement.executeQuery(SQL);
Clob ddl;
String type = TYPE_MARK;
int count = 0;
List<String> list = new ArrayList<String>();
while(rs.next()) {
ddl = rs.getClob(1);
fw.write(ddl.getSubString(1L, (int)ddl.length()));
if(!rs.getString(2).equals(type)) {
if(!type.equals(TYPE_MARK)) {
list.add(type + "," + count);
type = rs.getString(2);
count = 1;
} else {
type = rs.getString(2);
count ++;
}
} else
count ++;
}
list.add(type + "," + count);
fw.flush();
fw.close();
rs.close();
statement.close();
con.close();
for(String type1 : list)
System.out.print(type1.split(",")[0] + ":" + type1.split(",")[1] + ";");
System.out.println();
}
}
config.properties
url=jdbc:oracle:thin:@192.168.1.2:1521:orcl
username=abc
password=abc
outfile=tables.sql
sql=SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.object_name), U.OBJECT_TYPE \
FROM USER_OBJECTS U \
where U.OBJECT_TYPE = 'TABLE' \
or U.OBJECT_TYPE = 'VIEW' \
or U.OBJECT_TYPE = 'INDEX' \
or U.OBJECT_TYPE = 'PROCEDURE' \
or U.OBJECT_TYPE = 'SEQUENCE' \
or U.OBJECT_TYPE = 'TRIGGER' \
order by U.OBJECT_TYPE desc
看完上述内容是否对您有帮助呢?如果还想对相关知识有进一步的了解或阅读更多相关文章,请关注亿速云行业资讯频道,感谢您对亿速云的支持。
亿速云「云数据库 MySQL」免部署即开即用,比自行安装部署数据库高出1倍以上的性能,双节点冗余防止单节点故障,数据自动定期备份随时恢复。点击查看>>
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。