Json lib jar包 2.9.8 包里有6文件 下载 jackson包 jackson-databind-2.9.8.jar jackson-core-2.9.8.jar jackson-annotations-2.9.8.jar jackson-mapper-asl-1.9.13.jar jackson-module-jaxb-annotations-2.9.8.jar jackson-core-asl-1.9.13.jar jackson-mapper-asl-1.9.13.jar