oracle Clob类型转换成String类型
转载:https://www.cnblogs.com/itmyhome/p/4131339.html
Clob类型转换成String类型
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)
- )
- 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;
- }
- }