AWS 无法将 START_OBJECT 反序列化为 java.lang.String 的实例。
AWS 无法将 START_OBJECT 反序列化为 java.lang.String 的实例。
我已经创建了一个Lambda函数,并希望通过API Gateway的帮助来通过URL访问它。
我已经完成了所有设置,还在API Gateway中创建了一个application/json
的body映射模板,如下所示:
{
"input": "$input.params('input')",
}
然后,我触发了一个HTTP GET请求,它的样子是这样的:
https://dmquh95ckh.execute-api.eu-west-1.amazonaws.com/prod/OtoTestFunction?input=test
我的Java处理程序类是这样的:
public class LambdaFunctionHandler implements RequestHandler{ @Override public String handleRequest(String input, Context context) { context.getLogger().log("Input: " + input); return "Test completed."+input; } }
以下是完整的错误消息:
{
"errorMessage": "在JSON解析过程中发生错误",
"errorType": "java.lang.RuntimeException",
"stackTrace": [],
"cause": {
"errorMessage": "com.fasterxml.jackson.databind.JsonMappingException: 无法将START_OBJECT令牌反序列化为java.lang.String实例\n at [Source: lambdainternal.util.NativeMemoryAsInputStream@68c4039c; line: 1, column: 1]",
"errorType": "java.io.UncheckedIOException",
"stackTrace": [],
"cause": {
"errorMessage": "无法将START_OBJECT令牌反序列化为java.lang.String实例\n at [Source: lambdainternal.util.NativeMemoryAsInputStream@68c4039c; line: 1, column: 1]",
"errorType": "com.fasterxml.jackson.databind.JsonMappingException",
"stackTrace": [
"com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)",
"com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:835)",
"com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:59)",
"com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:12)",
"com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:1441)",
"com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1047)"
]
}
}
}