java.lang.IllegalArgumentException: No converter found for return value of type:

java.lang.IllegalArgumentException: No converter found for return value of type:

本人使用了阿里的fastson，结果出错，改成Jackson，错误解决

在pom文件中加入依赖

　　　　<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.8</version>
        </dependency>

加入之后出现依赖的jar包

java.lang.IllegalArgumentException: No converter found for return value of type:

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