JSON修改并插入数据问题

"path_info": "[{\"seq_no\":\"1\",\"province\":\"31\",\"province_name\":\"\\u4e0a\\u6d77\\u5e02\",\"city\":\"3101\",\"city_name\":\"\\u5e02\\u8f96\\u533a\",\"county\":\"310115\",\"county_name\":\"\\u6d66\\u4e1c\\u65b0\\u533a\",\"arrive_day_from\":\"2010\\/09\\/16\",\"arrive_time_from\":\"00:00:00\",\"arrive_day_to\":\"2010\\/09\\/16\",\"arrive_time_to\":\"00:00:00\",\"delivery_day_from\":\"2010\\/09\\/16\",\"delivery_time_from\":\"00:00:00\",\"delivery_day_to\":\"2010\\/09\\/16\",\"delivery_time_to\":\"00:00:00\",\"can_load_weight\":\"0\",\"can_load_length\":\"5\",\"can_load_width\":\"4\",\"can_load_height\":\"3\",\"journey_time\":\"0\",\"toll_fee\":\"0\",\"vehicle_status\":\"3\",\"cantModifySeq\":\"1\",\"new_seq_no\":\"1\"},{\"seq_no\":\"2\",\"province\":\"32\",\"province_name\":\"\\u6c5f\\u82cf\\u7701\",\"city\":\"3202\",\"city_name\":\"\\u65e0\\u9521\\u5e02\",\"county\":\"320202\",\"county_name\":\"\\u5d07\\u5b89\\u533a\",\"arrive_day_from\":\"2010\\/09\\/16\",\"arrive_time_from\":\"00:00:00\",\"arrive_day_to\":\"2010\\/09\\/16\",\"arrive_time_to\":\"00:00:00\",\"delivery_day_from\":\"2010\\/09\\/16\",\"delivery_time_from\":\"00:00:00\",\"delivery_day_to\":\"2010\\/09\\/16\",\"delivery_time_to\":\"00:00:00\",\"can_load_weight\":\"20\",\"can_load_length\":\"5\",\"can_load_width\":\"4\",\"can_load_height\":\"3\",\"journey_time\":\"8\",\"toll_fee\":\"200\",\"vehicle_status\":\"1\",\"cantModifySeq\":\"1\",\"new_seq_no\":\"2\"}]"
我需要把path_info重写.该怎么做?