MessagePack Java Jackson 在不关闭输入流（input stream）的情况下反序列化多变量

- 日理万妓 2021-10-23 09:43 140阅读 0赞

`com.fasterxml.jackson.databind.ObjectMapper` 在读取输入流变量的时候默认的将会关闭输入流。

如果你不希望关闭输入流，你可以设置 `JsonParser.Feature.AUTO_CLOSE_SOURCE` 参数为 false。

本测试方法，可以在 [https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/test/java/com/insight/demo/serialize/MessagePackSerializer.java][https_github.com_cwiki-us-demo_serialize-deserialize-demo-java_blob_master_src_test_java_com_insight_demo_serialize_MessagePackSerializer.java] 中找到。

/**
     * Serialization Not Close input stream
     */
    @Test
    public void testMessagePackSerializationNotCloseInputStream() {
        logger.debug("testMessagePackSerializationNotCloseInputStream");
    
        try {
            File tempFile = File.createTempFile("messagepack-", "-cwiki.us");
    
            MessagePacker packer = MessagePack.newDefaultPacker(new FileOutputStream(tempFile));
            packer.packInt(42);
            packer.packString("Hello");
            packer.close();
    
            FileInputStream in = new FileInputStream(tempFile);
            ObjectMapper objectMapper = new ObjectMapper(new MessagePackFactory());
            objectMapper.configure(JsonParser.Feature.AUTO_CLOSE_SOURCE, false);
            System.out.println(objectMapper.readValue(in, Integer.class));
            System.out.println(objectMapper.readValue(in, String.class));
            in.close();
    
            tempFile.deleteOnExit();
        } catch (IOException ex) {
            logger.error("Serialize Error", ex);
        }
    }

[https://www.cwiki.us/display/Serialization/MessagePack+Jackson+Dataformat][https_www.cwiki.us_display_Serialization_MessagePack_Jackson_Dataformat]

转载于:https://www.cnblogs.com/huyuchengus/p/11330362.html

[https_github.com_cwiki-us-demo_serialize-deserialize-demo-java_blob_master_src_test_java_com_insight_demo_serialize_MessagePackSerializer.java]: https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/test/java/com/insight/demo/serialize/MessagePackSerializer.java
[https_www.cwiki.us_display_Serialization_MessagePack_Jackson_Dataformat]: https://www.cwiki.us/display/Serialization/MessagePack+Jackson+Dataformat