【Request processing failed; nested exception is java.lang.IllegalArgumentException: No converter found for return value of type: class cn.e3mall.pojo.TbItem】的更多相关文章

Request processing failed; nested exception is java.lang.IllegalArgumentException: No converter found for return value of type: class cn.e3mall.pojo.TbItem

这个异常是缺少json相关的包 把以下依赖补上就好: <!-- Jackson Json处理工具包 --><dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version></dependency&…

HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalArgumentException: Control character in cookie value or attribute.

HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalArgumentException: Control character in cookie value or attribute. type Exception report message Request processing failed; nested exception is java.lang.IllegalArgumen…

HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException

HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException type Exception report message Request processing failed; nested exception is java.lang.NullPointerException description The server encountered an internal…

error：org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException

问题:调用的方法在一个接口类中,但我并没有注入那个被调用的类 解决:在UserEntity前加上@Autowired @Controller public class MainController { // 自动装配数据库接口,不需要再写原始的Connection来操作数据库 @Autowired UserRepository userRepository; @RequestMapping(value = "/",method = RequestMethod.GET) public S…

报错：严重: Servlet.service() for servlet [springmvc] in context with path [ ] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

解决:service类或dao类需要@Autowired…

SSM框架报HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException错

如下图 一番排查之后发现原来是server层写漏注释了 粗心大意,一天内出现两次写漏注释,SSM框架有意思.…

Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() has already been called for this response

问题分析: 在ServletRequest servletRequest中已经存在一个项目名称,此时,又用项目名称访问 http://localhost:8080/rent/pdf/preview rent这个名称已经在Application.yml中设置了, 这时会生成一个缓存在servletRequest中,访问就会有重复的/rent,就会报错 解决方案 清空servletRequest中存在的/rent缓存 @Override public void doFilter(ServletReq…

14- Servlet.service() for servlet [mvc-dispatcher] in context with path [/collegeservice] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root caus

有的service没有依赖注入:…

解决java.lang.IllegalArgumentException: No converter found for return value of type: class java.util.ArrayList问题

在spring + springmvc + mybatis框架中,我们配置接口对外返回json格式,但是报如下错误: 24-Oct-2017 17:42:23.495 严重 [http-nio-8080-exec-6] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcherServlet] in context with path [] threw excepti…

解决java.lang.IllegalArgumentException: No converter found for return value of type: class java.util.ArrayList的问题

一.背景 最近闲来无事,想自己搭建一套Spring+SpringMVC+Mybatis+Mysql的环境(搭建步骤会在以后博客中给出),结果运行程序时,适用@ResponseBody注解进行返回List<对象>的json数据时出现了:nested exception is java.lang.IllegalArgumentException: No converter found for return value of type: class java.util.ArrayList错误,就细细…