"Could not find acceptable representation"使用spring-boot-starter-web。
"Could not find acceptable representation"使用spring-boot-starter-web。
我正在尝试使用spring-boot-starter-web创建一个REST服务，用于提供Java对象的JSON表示。据我所了解，这个boot-starter-web jar应该通过Jackson自动处理JSON转换，但我却得到了这个错误。
{
"timestamp": 1423693929568,
"status": 406,
"error": "Not Acceptable",
"exception": "org.springframework.web.HttpMediaTypeNotAcceptableException",
"message": "Could not find acceptable representation"
}
我的Controller如下...
@RestController
@RequestMapping(value = "/media")
public class MediaController {
@RequestMapping(value = "/test", method = RequestMethod.POST)
public @ResponseBody UploadResult test(@RequestParam(value="data") final String data) {
String value = "hello, test with data [" + data + "]";
return new UploadResult(value);
}
@RequestMapping(value = "/test2", method = RequestMethod.POST)
public int test2() {
return 42;
}
@RequestMapping(value = "/test3", method = RequestMethod.POST)
public String test3(@RequestParam(value="data") final String data) {
String value = "hello, test with data [" + data + "]";
UploadResult upload = new UploadResult(value);
return upload.value;
}
public static class UploadResult {
private String value;
public UploadResult(final String value)
{
this.value = value;
}
}
}
我的pom.xml如下...
org.springframework.boot spring-boot-starter-web 1.2.1.RELEASE org.springframework.boot spring-boot-starter-tomcat 1.2.1.RELEASE provided
mvn dependency:tree显示spring-boot-starter-web确实依赖于jackson2.4 databind，因此应该在类路径上...
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.2.1.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter:jar:1.2.1.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot:jar:1.2.1.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.2.1.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot-starter-logging:jar:1.2.1.RELEASE:compile
[INFO] | | | +- org.slf4j:jul-to-slf4j:jar:1.7.8:compile
[INFO] | | | \- org.slf4j:log4j-over-slf4j:jar:1.7.8:compile
[INFO] | | \- org.yaml:snakeyaml:jar:1.14:runtime
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.4.4:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-annotations:jar:2.4.0:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.4.4:compile
[INFO] | +- org.hibernate:hibernate-validator:jar:5.1.3.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.1.3.GA:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.0.0:compile
[INFO] | +- org.springframework:spring-web:jar:4.1.4.RELEASE:compile
[INFO] | | +- org.springframework:spring-aop:jar:4.1.4.RELEASE:compile
[INFO] | | | \- aopalliance:aopalliance:jar:1.0:compile
[INFO] | | +- org.springframework:spring-beans:jar:4.1.4.RELEASE:compile
[INFO] | | \- org.springframework:spring-context:jar:4.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:4.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-expression:jar:4.1.4.RELEASE:compile
...但调用test服务会出现上述错误。 test2和test3正常工作，证明可能只是尝试转换为JSON失败了？我是否遗漏了某些配置问题或注释？根据我找到的所有示例，注释类以进行基本的Jackson JSON转换不再是必需的。
非常感谢您的帮助。
