<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">1，專案一直用的spring 3.2.3版本+jackson 1.9.11版本。請求一直沒有問題</span>

2，今天把spring版本升到4.1以上的版本就出現了問題

報錯資訊：

<pre name="code" class="java"> Resolving exception from handler [public java.lang.Object com.wulongyuan.controller.DemoController.test()]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
 Resolving exception from handler [public java.lang.Object com.wulongyuan.controller.DemoController.test()]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
Resolving exception from handler [public java.lang.Object com.wulongyuan.controller.DemoController.test()]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
Resolving exception from handler [public java.lang.Object com.wulongyuan.controller.DemoController.test()]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
Resolving exception from handler [public java.lang.Object com.wulongyuan.controller.DemoController.test()]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
DE
 

</pre><p></p><pre>

讓後就去看Spring官方文件  發現sping4.已經 對jackson1.9不支援了，為了測試，我將我spring的版本改回3.2+的版本。發現正常通過。因此又將版本改回，然後把jaskson的版本改為2.5

  <jackson.version>2.5.0</jackson.version>
 <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
            </dependency>