maven 配置:
- <dependency>
- <groupId>org.codehaus.jackson</groupId>
- <artifactId>jackson-core-asl</artifactId>
- <version>1.9.12</version>
- </dependency>
- <!-- https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-mapper-asl -->
- <dependency>
- <groupId>org.codehaus.jackson</groupId>
- <artifactId>jackson-mapper-asl</artifactId>
- <version>1.9.12</version>
- </dependency>
代码:
- @RequestMapping("/user/create")
- @ResponseBody
- public User createUser(){
- User user=new User();
- user.setEmail("@192777585@qq.com");
- user.setFirstname("hello tom");
- user.setLastname("good name");
- user.setPhone(123145);
- return user;
- }
出现错误:
- org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: No converter found for return value of type: class com.shangsheng.entity.User
- org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
- org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
- javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
- org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
- javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
- org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
- org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
- org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
- Root Cause
- java.lang.IllegalArgumentException: No converter found for return value of type: class com.shangsheng.entity.User
- org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:187)
- org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174)
- org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
- org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113)
- org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandler
解决问题:
1. 修改 maven, 去掉之前 json 配置, 添加以下配置
- <!--apache shiro end-->
- <!-- 映入 JSON -->
- <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
- <dependency>
- <groupId>com.fasterxml.jackson.core</groupId>
- <artifactId>jackson-databind</artifactId>
- <version>2.9.2</version>
- </dependency>
- <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
- <dependency>
- <groupId>com.fasterxml.jackson.core</groupId>
- <artifactId>jackson-core</artifactId>
- <version>2.9.2</version>
- </dependency>
- <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
- <dependency>
- <groupId>com.fasterxml.jackson.core</groupId>
- <artifactId>jackson-annotations</artifactId>
- <version>2.9.2</version>
- </dependency>
来源: http://www.bubuko.com/infodetail-2645786.html