syntax error, expect [, actual {, pos 0, fieldName null

这个错误信息"syntax error, expect [, actual {, pos 0, fieldName null"指的是在解析json字符串时发生了语法错误，期望的是"["而实际上是"{"，错误位置在字段名为null的位置。
这种情况通常是由于json字符串的格式不符合规范造成的。有时候可能是由于json字符串套了两层引号导致的，可以通过对json字符串进行一些处理来解决这个问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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