Clob类型转换成String类型
2014-02-23 18:55
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oracle中表结构如下:
create table GRID_RESOURCE ( ID VARCHAR2(50), CNNAME VARCHAR2(50), TYPE VARCHAR2(50), PARENTID VARCHAR2(50), VIEWWIDTH VARCHAR2(50), REQUESTURL VARCHAR2(256), COUNTSQL CLOB, ISDISPLAY VARCHAR2(50), TREEINDEX VARCHAR2(256), TABLES VARCHAR2(256), NOTE3 VARCHAR2(256) )COUNTSQL字段为CLOB类型,索引为6
import java.io.BufferedReader; import java.io.IOException; import java.io.Reader; import java.sql.Clob; import java.sql.SQLException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class T { public static final SessionFactory sessionFactory; static { try { sessionFactory = new Configuration().configure() .buildSessionFactory(); } catch (Throwable ex) { throw new ExceptionInInitializerError(ex); } } /** * @param args */ public static void main(String[] args) { new T().getList(); } public void getList() { String querySQL = "select * from GRID_RESOURCE"; String countSQL = ""; List<Object[]> list = new ArrayList<Object[]>(); // List o_list = new ArrayList(); try { list = sessionFactory.openSession().createSQLQuery(querySQL).list(); for (Object[] obj : list) { Map<String, Object> map = new HashMap<String, Object>(); Clob sc = (Clob) obj[6]; countSQL = ClobToString(sc); System.out.println(countSQL); } // 另一个遍历方法 /* * for(Object obj:o_list){ Object oo[] = (Object[])obj; * System.out.println(oo[6]); } */ } catch (Exception e) { e.printStackTrace(); } } // 将字Clob转成String类型 public String ClobToString(Clob sc) throws SQLException, IOException { String reString = ""; Reader is = sc.getCharacterStream();// 得到流 BufferedReader br = new BufferedReader(is); String s = br.readLine(); StringBuffer sb = new StringBuffer(); while (s != null) {// 执行循环将字符串全部取出付值给StringBuffer由StringBuffer转成STRING sb.append(s); s = br.readLine(); } reString = sb.toString(); return reString; } }
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