Exemplo n.º 1
0
  public long getNextValue(String seqfunctionname, String sequence, Connection con, String dbname)
      throws SQLException {
    long curValue = 0;
    PreparedDBUtil dbutil = new PreparedDBUtil();
    try {
      //			if()
      String sql = "select " + sequence + ".nextval from dual";
      dbutil.preparedSelect(dbname, sql);
      dbutil.executePrepared(con);
      if (dbutil.size() <= 0) {
        //				System.out.println("select " + this.generator + ".nextval from dual");
        throw new SQLException(
            "[select "
                + sequence
                + ".nextval from dual] from ["
                + dbname
                + "] failed:retrun records is 0.");
      }
      curValue = dbutil.getInt(0, 0);

      return curValue;

    } catch (SQLException e) {
      throw e;
    }
  }
Exemplo n.º 2
0
  /** 针对oracle Clob字段的插入操作 */
  @Test
  public void testBigClobWrite() {
    PreparedDBUtil dbUtil = new PreparedDBUtil();
    TransactionManager tm = new TransactionManager();
    try {
      // 启动事务
      tm.begin();
      // 先插入一条记录,blob字段初始化为empty_lob
      dbUtil.preparedInsert("insert into test(id,clobname) values(?,?)");
      String id = DBUtil.getNextStringPrimaryKey("test");
      dbUtil.setString(1, id);
      dbUtil.setClob(2, CLOB.empty_lob()); // 先设置空的blob字段

      dbUtil.executePrepared();

      // 查找刚才的插入的记录,修改blob字段的值为一个文件
      dbUtil = new PreparedDBUtil();
      dbUtil.preparedSelect("select clobname from test where id = ?");
      dbUtil.setString(1, id);
      dbUtil.executePrepared();

      CLOB clob = (CLOB) dbUtil.getClob(0, "clobname");
      if (clob != null) {
        DBUtil.updateCLOB(clob, new java.io.File("d:\\route.txt"));
      }
      tm.commit();

    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
      try {
        tm.rollback();
      } catch (RollbackException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
      }
    } finally {
      tm = null;
      dbUtil = null;
    }
  }
Exemplo n.º 3
0
  private boolean exist(Connection con, long curValue) throws SQLException {
    String select =
        "select count(1) from " + this.tableName + " where " + this.primaryKeyName + "=?";
    PreparedDBUtil dbUtil = new PreparedDBUtil();
    try {
      //			String update = "update tableinfo set table_id_value=" + this.curValue +" where
      // table_name='"+ tableName.toLowerCase() + "' and table_id_value <" + this.curValue  ;
      dbUtil.preparedSelect(this.dbname, select);
      if (this.metaType.equals("int")
          || this.metaType.equals("java.lang.Integer")
          || this.metaType.equals("java.lang.integer")
          || this.metaType.equalsIgnoreCase("integer")) {
        dbUtil.setInt(1, (int) curValue);
      } else if (this.metaType.equals("java.lang.Long")
          || this.metaType.equals("java.lang.long")
          || this.metaType.equalsIgnoreCase("long")) {
        dbUtil.setLong(1, curValue);
      } else if (this.metaType.equals("java.lang.String")
          || this.metaType.equalsIgnoreCase("string")) {

        dbUtil.setString(1, this.prefix + curValue + "");
      } else {
        dbUtil.setString(1, this.prefix + curValue + "");
      }

      dbUtil.executePrepared(con);
      if (dbUtil.getInt(0, 0) > 0) return true;
    } catch (SQLException e1) {

      e1.printStackTrace();
      throw e1;

    } catch (Exception e1) {

      e1.printStackTrace();
      throw new SQLException(e1.getMessage());
    } finally {
      dbUtil.resetPrepare();
    }
    return false;
  }
Exemplo n.º 4
0
  /** 大字段的读取 */
  @Test
  public void testBlobRead() {
    PreparedDBUtil dbUtil = new PreparedDBUtil();
    try {
      // 查询大字段内容并且将大字段存放到文件中
      dbUtil.preparedSelect("select id,blobname from test");
      dbUtil.executePrepared();

      for (int i = 0; i < dbUtil.size(); i++) {

        dbUtil.getFile(i, "blobname", new java.io.File("e:/dominspector.rar")); // 将blob字段的值转换为文件
        //				Blob blob = dbUtil.getBlob(i, "blobname");//获取blob字段的值到blob变量中。
      }

    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } finally {

    }
  }
Exemplo n.º 5
0
  /** clob字段的读取 */
  @Test
  public void testClobRead() {
    PreparedDBUtil dbUtil = new PreparedDBUtil();
    try {
      // 查询大字段内容并且将大字段存放到文件中
      dbUtil.preparedSelect("select id,clobname from test");
      dbUtil.executePrepared();

      for (int i = 0; i < dbUtil.size(); i++) {

        dbUtil.getFile(i, "clobname", new java.io.File("d:/route" + i + ".txt")); // 读取clob字段到文件中
        //				String clobvalue = dbUtil.getString(i, "clobname");//获取clob字段到字符串变量中
        //				Clob clob = dbUtil.getClob(i, "clobname");//获取clob字段值到clob类型变量中
      }

    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } finally {
      dbUtil = null;
    }
  }