Dart/颤振json.decode与多行值
Dart/颤振json.decode与多行值
提问于 2022-06-29 15:33:32
我有多行的json数据。当我使用json.decode时，我会出错。
"FormatException (FormatException: Control character in string
... "count": "1", "price": "5", "description": "It is a long established fact我的Json数据
var str = {
"description": "It is a long established fact
that a reader will be distracted by the readable content
of a page when looking at its layout. The point
of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English."
}谢谢,
回答 1
Stack Overflow用户
回答已采纳
发布于 2022-06-29 15:53:54
不确定你是想编还是解码。
如果您希望编码(根据数据创建JSON字符串)，您应该确保提供给json.encode的变量是Map<String, dynamic>类型的。此外，如果您想拥有多行字符串，则应该在Dart中使用三元引号"""。下面是一个例子
var data = {
"description": """It is a long established fact
that a reader will be distracted by the readable content
of a page when looking at its layout. The point
of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English."""
};
final jsonString = json.encode(data);如果您想要解码(将JSON字符串转换为Dart对象)，则输入字符串应该被正确格式化。JSON不支持字符串，因此您需要添加换行\n，因此在字符串声明中也必须忽略这些字符串，就像JSON中的引号一样，导致了\\n和\"
var str = "{\"description\": \"It is a long established fact\\nthat a reader will be distracted by the readable content\\nof a page when looking at its layout. The point\\nof using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English.\"}";
final data = json.decode(str);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72804149
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