简单代码导出ORACLE数字字典

姚梨祎

　　前话：老系统，居然连数据字典都没，全是SQL。无奈从数据库导出数字字典，很简单的代码，就是读oracel系统表。


把输出保存到文件，然后excel导入，用tab分隔就行了。

　　
　　


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Test {
public static void main(String[] args) {
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection(
"jdbc:oracle:thin:@192.168.10.11:1521:hzdev", "xiao",
"xiao");
Statement stmt = con.createStatement();
StringBuffer strbuf = new StringBuffer();
strbuf.append("SELECT A.*,B.comments");
strbuf.append(" FROM all_tab_columns A,DBA_COL_COMMENTS B");
strbuf.append(" WHERE A.owner=B.owner");
strbuf.append(" AND A.table_name=B.table_name");
strbuf.append(" AND A.COLUMN_NAME=B.COLUMN_NAME");
// owner是指要导出哪个用户的
strbuf.append(" AND A.owner='XIAO'");
strbuf.append(" ORDER BY A.TABLE_NAME");
ResultSet rs = stmt.executeQuery(strbuf.toString());
String tb = "";
String tempTb=null;
StringBuffer sb = new StringBuffer();
int count=0;
while (rs.next()) {
tb = rs.getString("TABLE_NAME");
if (!tb.equals(tempTb)) {
count++;
sb.append("\n");
System.out.println(sb.toString());
sb = new StringBuffer();
sb.append("表名："+tb);
tempTb=tb;
sb.append("\n字段名称\t");
sb.append("字段类型\t");
sb.append("长度\t");
sb.append("数字长度\t");
sb.append("小数位数\t");
sb.append("是否要空\t");
sb.append("字段说明\t");
}
sb.append("\n"+rs.getString("COLUMN_NAME") + "\t");
sb.append(rs.getString("DATA_TYPE") + "\t");
sb.append(rs.getString("DATA_LENGTH") + "\t");
sb.append(rs.getString("DATA_PRECISION") + "\t");
sb.append(rs.getString("DATA_SCALE") + "\t");
sb.append(rs.getString("NULLABLE") + "\t");
sb.append(rs.getString("COMMENTS") + "\t");
}
System.out.println("表的个数:"+count);
rs.close();
stmt.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}