go封装将所有数字类型转浮点型，可设置保留几位小数

封装转换方法

/*
*
* 将类型转浮点型，并保留小数
ToFloat(123, 2)
ToFloat(3.5254, 0)
*/
func ToFloat(value interface{}, precision int) (float64, error) {var f float64var err errorswitch v := value.(type) {case float64:f = vcase float32:f = float64(v)case int:f = float64(v)case int32:f = float64(v)case int64:f = float64(v)case uint:f = float64(v)case uint64:f = float64(v)case string:f, err = strconv.ParseFloat(v, 64)if err != nil {return 0, fmt.Errorf("无法将字符串转换为浮点数: %v", err)}case bool:if v {f = 1} else {f = 0}default:return 0, fmt.Errorf("不支持的类型: %T", v)}// 处理精度if precision >= 0 {shift := math.Pow(10, float64(precision))f = math.Round(f*shift) / shift}return f, nil
}

使用

if m["state"] != nil && m["state"] != "" {state, _ := ToFloat(m["state"], 0)if state == 1 {where = fmt.Sprintf("%s and b.status='%s'", where, "1")}if state == 2 {where = fmt.Sprintf("%s and b.status='%s'", where, "2")}
}

使用

package mainimport ("fmt""utils"
)func main() {// 示例 1: 转换整数并保留2位小数result, _ := utils.ToFloat(123, 2)fmt.Println(result) // 输出: 123.00// 示例 2: 转换字符串并保留3位小数result, _ = utils.ToFloat("3.14159", 3)fmt.Println(result) // 输出: 3.142 (四舍五入)// 示例 3: 转换布尔值result, _ = utils.ToFloat(true, 0)fmt.Println(result) // 输出: 1// 示例 4: 转换失败时返回默认值result = utils.ToFloatWithDefault("abc", 2, 0.0)fmt.Println(result) // 输出: 0
}

封装

package taskimport ("fmt""math""strconv"
)/*
将类型转浮点型，并保留小数
ToFloat(123, 2)
ToFloat(3.5254, 0)
*/
func ToFloat(value interface{}, precision int) (float64, error) {var f float64var err errorswitch v := value.(type) {case float64:f = vcase float32:f = float64(v)case int:f = float64(v)case int32:f = float64(v)case int64:f = float64(v)case uint:f = float64(v)case uint64:f = float64(v)case string:f, err = strconv.ParseFloat(v, 64)if err != nil {return 0, fmt.Errorf("无法将字符串转换为浮点数: %v", err)}case bool:if v {f = 1} else {f = 0}default:return 0, fmt.Errorf("不支持的类型: %T", v)}// 处理精度if precision >= 0 {shift := math.Pow(10, float64(precision))f = math.Round(f*shift) / shift}return f, nil
}