java通过反射方法给对象属性赋值

问题来源：一个表中有将近20个字段，现在需要按照指定的时间范围来汇总每个字段，并把汇总的结果放在与此表对应的实体对象中返回。业务逻辑非常简单，就是在编码时需要一个一个属性的赋值，有些繁琐，此代码长度过长。
解决方法：使用循环，先取得每个属性的set方法，再使用反射来调用set方法赋值
代码如下：

public TomEnsure getTomEnsureStatis(String startDate,String endDate){        
        TomEnsure tomEnsure = new TomEnsure();    
        SqlRowSet result = null;
        int sumNumber = 0;
        //先得出各汇总字段
        String[] colStr = {"scheduled_task","special_task","chartered_task","other_task",
                "military_task","amount_task","domestic_task","area_task","internation_task",
                "passenger_task","manned_task","other_type_task","nonprofit_task",
                "amount_general_task","total_task"};
        for (String str :  colStr){
            String sql = "select sum(" + str + ")"
                    + " as sumNumber from t_tom_ensure_statis where statis_day between '"
                    + startDate + "' and '" + endDate + "'";
            result = statisticDataJdbcTemplate.queryForRowSet(sql);
            sumNumber = result.next() ? result.getInt("sumNumber") : 0;
            try {
                Method[] m = tomEnsure.getClass().getMethods();
                for (int i = 0; i < m.length; i++ ){
                    if (("set" + str.replace("_","")).toLowerCase().equals(m[i].getName().toLowerCase())){
                        m[i].invoke(tomEnsure,sumNumber);  //反射赋值
                        break;
                    }
                }
            }catch (Exception e){
                log.error(e.getMessage());
            }
        }
         

        return tomEnsure;
    }