完成mapping解析

reflect.go

@@ -144,6 +144,58 @@ func (rt *ReflectType) fillMappingRule(field *StructField, inputMappingVal strin
 		item = strings.TrimSpace(item)
 		// 要赋值的字段名
 		itemArr := strings.Split(item, ":")
+		if len(itemArr) != 2 {
+			// 配置格式错误, 跳过
+			continue
+		}
 		rule.TargetField = strings.TrimSpace(itemArr[0])
+		mapRuleArr := strings.Split(strings.TrimSpace(itemArr[1]), "|")
+		for _, itemMapRule := range mapRuleArr {
+			itemMapRule = strings.TrimLeft(itemMapRule, "#")
+			itemMapRuleArr := strings.Split(itemMapRule, "#")
+			// 注意 : # 为特殊分隔符, 如配置成 mapping:"project_id:#source_project_id#xxx_project_id" 实际等价于 mapping:"project_id:#source_project_id" 多余配置自动跳过
+			if len(itemMapRuleArr[0]) < 2 {
+				// 没有指定位置，默认all, 即配置格式: mapping:"project_id:#source_project_id"
+				itemMapRuleArr[0] = MappingLocationAll
+				itemMapRuleArr = []string{MappingLocationAll, itemMapRuleArr[0]}
+			}
+
+			switch itemMapRuleArr[0] {
+			// 从header读取
+			case MappingLocationHeader:
+				rule.RuleList = append(rule.RuleList, MappingRuleItem{
+					Location: MappingLocationHeader,
+					Field:    itemMapRuleArr[1],
+				})
+			// 从请求参数读取
+			case MappingLocationParam:
+				rule.RuleList = append(rule.RuleList, MappingRuleItem{
+					Location: MappingLocationParam,
+					Field:    itemMapRuleArr[1],
+				})
+			// 从响应数据读取
+			case MappingLocationResponse:
+				rule.RuleList = append(rule.RuleList, MappingRuleItem{
+					Location: MappingLocationResponse,
+					Field:    itemMapRuleArr[1],
+				})
+			// 从扩展数据读取
+			case MappingLocationExtension:
+				rule.RuleList = append(rule.RuleList, MappingRuleItem{
+					Location: MappingLocationExtension,
+					Field:    itemMapRuleArr[1],
+				})
+				// 全部读取一遍
+			case MappingLocationAll:
+				fallthrough
+			default:
+				for _, itemLocation := range mappingLocationList {
+					rule.RuleList = append(rule.RuleList, MappingRuleItem{
+						Location: itemLocation,
+						Field:    itemMapRuleArr[1],
+					})
+				}
+			}
+		}
 	}
 }