JdbcTemplate代码的部分使用

 查询代码 in Spring JdbcTemplate

package com.cm.main.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import com.cm.main.dao.AbstractDao;
import com.cm.main.dao.TestJdbcTemplateDao;
import com.cm.main.bo.User;

public class TestJdbcTemplateDaoImpl extends AbstractDao implements
        TestJdbcTemplateDao {

    public void updateDescription(int id, String description) {
        JdbcTemplate jt = new JdbcTemplate(getDataSource());
        jt.update("update oa_test_1 set description = ? where id = ?", new Object[] {
                description, new Integer(id) });
    }

    public int getCount() {
        JdbcTemplate jt = new JdbcTemplate(getDataSource());
        int count = jt.queryForInt("select count(*) from oa_test_1");
        return count;
    }

    public String getDescription() {
        JdbcTemplate jt = new JdbcTemplate(getDataSource());
        String name = (String) jt.queryForObject(
                "select description from oa_test_1 where id=1", String.class);
        return name;
    }

    public List getTestList(int id) {
        String sql = "select id, description from oa_test_1 where id = ?";
        RowMapper mapper = new RowMapper() {
            public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                User user = new User();
                user.setUserid(new Integer(rs.getInt("id")));
                user.setUsername(rs.getString("description"));
                return user;
            }
        };
        JdbcTemplate jt = new JdbcTemplate(this.getDataSource());
        return jt.query(sql, new Object[] { new Integer(id) }, mapper);
    }
}

查询代码2
public Map getSumCountAllTop48(Date beginDate, Date endDate) {
  Map map = null;
  try {
   map = (Map) this.query(strsqlByDay, new Object[] { beginDate,
     endDate }, new ResultSetExtractor() {
    public Object extractData(ResultSet rs) throws SQLException,
      DataAccessException {
     // TODO Auto-generated method stub
     Map map = new HashMap();
     if (rs != null) {
      long oldId = 0;
      long sum = 0;
      long count = 0;
      while (rs.next()) {
       long newId = rs.getLong("id");
       long value = rs.getLong("value");
       if (oldId != newId) {
        ChannelStatVO vo = new ChannelStatVO();
        vo.getReg().setId(oldId);
        vo.setSum(sum);
        vo.setCount(count);
        map.put(oldId, vo);
        sum = 0;
        count = 0;
        oldId = newId;
       }

       if (count < 48) {
        count++;
        sum = sum + value;
       } else {
        continue;
       }
      }

      ChannelStatVO vo = new ChannelStatVO();
      vo.getReg().setId(oldId);
      vo.setSum(sum);
      vo.setCount(count);
      map.put(oldId, vo);
     }
     return map;
    }
   });

  } catch (Exception e) {
   // TODO: handle exception
   map = new HashMap();
   System.out.println(e.getMessage());
   logger.error("getSumCountAllTop48:" + e.getMessage(), e);
  } finally {
  }
  return map;
 }