org.springframework.web.filter.CharacterEncodingFilter报错

这个错误通常是由于在Spring应用程序的Web配置中缺少字符编码过滤器或配置不正确导致的。您可以尝试在web.xml或Spring配置中添加以下过滤器配置：

<filter>
  <filter-name>encodingFilter</filter-name>
  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  <init-param>
    <param-name>encoding</param-name>
    <param-value>UTF-8</param-value>
  </init-param>
  <init-param>
    <param-name>forceEncoding</param-name>
    <param-value>true</param-value>
  </init-param>
</filter>

<filter-mapping>
  <filter-name>encodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

这将把编码设置为UTF-8，并强制将所有请求和响应的编码设置为UTF-8。如果您已经有一个字符编码过滤器，并且仍然遇到这个错误，请检查该过滤器的配置是否正确，并确保它与Spring应用程序的Web配置兼容。

相关问题

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.atguigu.fruit.mapper.FruitMapper.getFruitList org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) javax.servlet.http.HttpServlet.service(HttpServlet.java:635) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:94) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

这是一个 Spring MVC 的请求处理异常，原因是绑定的语句无效，找不到对应的语句。具体来说，是在 com.atguigu.fruit.mapper.FruitMapper.getFruitList 中绑定的语句无效导致的。建议检查一下对应的 Mapper XML 文件中是否存在该语句，并且语句的命名是否正确。

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer com.cz.JobWeb.controller.persController.ShowOneComInfo(persController.java:39) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:807) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) javax.servlet.http.HttpServlet.service(HttpServlet.java:515) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:583) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:94) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

这是一个 Java 异常，具体来说是 `ClassCastException`，即类型转换异常。在你的代码中，你尝试将一个 `String` 类型的对象强制转换为 `Integer` 类型的对象，但是这个字符串的内容不符合整数的格式，因此转换失败，抛出了这个异常。你需要检查代码中涉及到类型转换的部分，确保转换的对象符合要求。