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

另外需要jdbc的Oracle驱动。

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