com.fasterxml.jackson.core.JsonGenerator类型无法解析。它是从所需的.class文件间接引用的 [英] The type com.fasterxml.jackson.core.JsonGenerator cannot be resolved. It is indirectly referenced from required .class files

问题描述

这里我在我的eclipse项目中使用Jackson数据绑定器2.4.1 jar库将对象转换为json格式。这是我的代码：

Here I am using Jackson data binder 2.4.1 jar library in my eclipse project to convert an object to a json format. And here is my code:

ObjectMapper mapper = new ObjectMapper();
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
mapper.writeValue(wr, content);

但最后一行 mapper.writeValue（wr，content）; 它会出现错误说

but in the last line mapper.writeValue(wr, content); it gives an error saying

The type com.fasterxml.jackson.core.JsonGenerator cannot be resolved. It is indirectly referenced from required .class files

<依赖于不可用的另一个类，则会发生这种类型的错误。但是从我使用这个代码段的地方，没有这样的问题。但是我通过更改JAR版本失败了很多时间，但没有解决这个问题。如何解决这个问题，请帮助

I have studied and found that when a jar file's class is dependent on another class which is unavailable then this type of error occurs. But from where I am using this code snippet there is no issue like this. But I have failed a lot of time by changing the JAR version but nothing solved this issue. How can I solve this, please help

推荐答案

您需要 jackson-databind 和 jackson-core

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