第一版提取数据,异常处理未完成

json/build.go

@@ -37,6 +37,7 @@ type JSONode struct {
 	IsIndexNode      bool        // 是否是slice的索引节点
 	Sort             int         // 此属性用于　slice解析,保证最终排序是对的
 	IsComplex        bool        // 是否为复杂数据类型
+	IsString         bool        // 是否为字符串
 }
 
 // NewDynamicJSON 获取JSON实例
@@ -129,24 +130,13 @@ func (dj *DynamicJSON) buildTpl(root *JSONode, tplList *[]string, valList *[]int
 			*tplList = append(*tplList, startSymbol)
 		} else {
 			*tplList = append(*tplList, valFormat)
-			switch val := root.Value.(type) {
-			case string:
-				*valList = append(*valList, val)
-			default:
-				*valList = append(*valList, root.Value)
-			}
+			*valList = append(*valList, root.Value)
 			return tplList, valList
 		}
 	} else {
 		if len(root.Child) == 0 {
-			switch val := root.Value.(type) {
-			case string:
-				*valList = append(*valList, val)
-				*tplList = append(*tplList, dj.getValFormat(root))
-			default:
-				*tplList = append(*tplList, dj.getValFormat(root))
-				*valList = append(*valList, root.Value)
-			}
+			*tplList = append(*tplList, valFormat)
+			*valList = append(*valList, root.Value)
 		} else {
 			*tplList = append(*tplList, startSymbol)
 		}
@@ -171,6 +161,7 @@ func (dj *DynamicJSON) getValFormat(root *JSONode) string {
 			// 还有自节点的情况下,不需要占位符
 			return ""
 		}
+
 		if root.IsHasLastBrother {
 			return key + ":%v,"
 		}
@@ -181,24 +172,11 @@ func (dj *DynamicJSON) getValFormat(root *JSONode) string {
 		// 是list的索引节点,且有子节点
 		return ""
 	}
-	switch root.Value.(type) {
-	case string:
-		if !root.IsComplex {
-			if root.IsHasLastBrother {
-				return "\"%v\","
-			}
-			return "\"%v\""
-		}
-		if root.IsHasLastBrother {
-			return "%v,"
-		}
-		return "%v"
-	default:
-		if root.IsHasLastBrother {
-			return "%v,"
-		}
-		return "%v"
+	if root.IsHasLastBrother {
+		return "%v,"
 	}
+	return "%v"
+
 }
 
 // getStartSymbol 计算起始的符号
@@ -311,6 +289,13 @@ func (dj *DynamicJSON) createNode(parent *JSONode, key string, value interface{}
 		IsRoot:           false,
 		IsHasLastBrother: false,
 		IsComplex:        isComplexType,
+		IsString:         false,
+	}
+	if !isComplexType {
+		switch value.(type) {
+		case string:
+			newNode.IsString = true
+		}
 	}
 	parent.IsSlice, newNode.Sort = dj.extraSliceIndex(key)
 	if parent.IsSlice {

json/json_test.go

@@ -64,8 +64,12 @@ func TestSelect(t *testing.T) {
 		},
 		"slice": []int{1, 2, 3},
 		"map":   map[string]interface{}{"a": 1, "b": 2, "c": 4},
+		"table": []map[string]interface{}{
+			{"name": "alex", "age": 18, "number": 1},
+			{"name": "bob", "age": 28, "number": 2},
+		},
 	}
-	pathList := []string{"name", "extra.age", "slice", "map"}
+	pathList := []string{"name", "extra.age", "slice", "map", "table.[].name|number|test"}
 	r, e := NewParseJSONTree(source).Parse(pathList)
 	fmt.Println(r.String(), e)
 }

json/parse.go

@@ -52,17 +52,23 @@ func (pjt *ParseJSONTree) Parse(pathList []string) (*DynamicJSON, error) {
 	source := string(byteData)
 	for _, path := range pathList {
 		// 为数组的处理
-		pathArr := strings.Split(path, "[]")
-		for idx, item := range pathArr {
-			val := gjson.Get(source, item)
-			isComplexType := val.IsArray()
-			if len(pathArr)-1 == idx {
-				// 当前是最后一项,说明不是数组
-				if isComplexType {
-					fmt.Println("这是一个数组")
+		pathArr := strings.Split(path, ".[].")
+		val := gjson.Get(source, pathArr[0])
+		isComplexType := val.IsArray() || val.IsObject()
+		if len(pathArr) == 1 {
+			result.SetValue(pathArr[0], val.Raw, isComplexType)
+			continue
+		}
+		// 支持list再抽取一层,处于性能考虑,这么限制,不做递归无限深度处理
+		// 还能继续抽取,就认为是 []map[string]interface{}
+		ketList := strings.Split(pathArr[1], "|")
+		for idx, item := range val.Array() {
+			data := item.Map()
+			for _, key := range ketList {
+				if v, exist := data[key]; exist {
+					result.SetValue(fmt.Sprintf(pathArr[0]+".[%d]."+key, idx), data[key].Raw, v.IsObject() || v.IsArray())
 				}
-				result.SetValue(item, val.Raw, isComplexType)
-				continue
+				// 结果集中不存在对应key,丢弃
 			}
 		}
 	}