Ajax的post请求参数过大异常处理

「爱情、让人受尽委屈。」 2022-03-15 03:24 356阅读 0赞

### Ajax的post请求参数过大异常解决 ###

*  问题描述
 *  报错原因
 *  如何修改
 *   *  方案一
     *  方案二

# 问题描述 #

使用Ajax的post请求时，在param中传递参数，但是参数较大，后台controller无法获得到list对象；导致报错，重点信息为：java.lang.IndexOutOfBoundsException: Index: 256, Size: 256；具体报错内容如下：

2019-02-28 17:12:37.291  INFO 22404 --- [nio-8081-exec-1] c.c.a.c.i.ErrorPageInterceptor           : 响应状态：500
    2019-02-28 17:12:37.291  INFO 22404 --- [nio-8081-exec-1] c.c.a.c.i.ErrorPageInterceptor           : 请求路径：/
    2019-02-28 17:12:46.453 ERROR 22404 --- [nio-8081-exec-3] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.beans.InvalidPropertyException: Invalid property 'schdDateList[256]' of bean class [com.ccx.axis.entity.structured.model.TrancheBean]: Index of out of bounds in property path 'schdDateList[256]'; nested exception is java.lang.IndexOutOfBoundsException: Index: 256, Size: 256] with root cause
    
    java.lang.IndexOutOfBoundsException: Index: 256, Size: 256
    	at java.util.ArrayList.rangeCheck(ArrayList.java:653) ~[?:1.8.0_91]
    	at java.util.ArrayList.get(ArrayList.java:429) ~[?:1.8.0_91]
    	at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:664) ~[spring-beans-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.beans.AbstractNestablePropertyAccessor.getNestedPropertyAccessor(AbstractNestablePropertyAccessor.java:848) ~[spring-beans-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyAccessorForPropertyPath(AbstractNestablePropertyAccessor.java:825) ~[spring-beans-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:268) ~[spring-beans-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:95) ~[spring-beans-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:860) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.validation.DataBinder.doBind(DataBinder.java:756) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:192) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:106) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.bindRequestParameters(ServletModelAttributeMethodProcessor.java:152) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:111) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) ~[spring-web-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.31.jar:8.5.31]

# 报错原因 #

spring在接收前台传递的list时，对对象进行映射时，会使用DataBinder对象进行封装，且该对象默认封装list中兑现最多为256个，如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hwX3lhbmdwZW5n_size_16_color_FFFFFF_t_70]  
因此list中最多能传递256个对象，此时我传递的对象数量已经超过了256个，报了数组越界异常；此处需要做的是修改spring的dataBlinder接收list中对象的个数即可；

# 如何修改 #

## 方案一 ##

在当前controller中添加一个初始化方法，在加载该controller时，首先会加载这个初始化方法，我们在这个初始化方法中设置这个controller能够接受的list中对象的个数即可；

@InitBinder
        public void initBinder(WebDataBinder binder) { //给这个controller配置接收list的长度100000，仅在这个controller有效
             binder.setAutoGrowCollectionLimit(100000);
        }

WebDataBinder 继承DataBinder对象；并将集合中最大值设置为10万即可；

至此，该问题就可解决；

## 方案二 ##

如果你的项目中有多个类似post请求，则使用上述方法显得有点麻烦，此处有一个简单的方法可以进行全局设置：  
定义一个初始化类：

public class myInitializer implements WebBindingInitializer { 
     	@Override 
    	 public void initBinder(WebDataBinder binder) {
    	 	binder.setAutoGrowCollectionLimit(100000);
    	 	 }
    	  }

然后在配置文件配置 ：

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
       <property name="webBindingInitializer">  
           <bean class="xxx.myInitializer"/>  //class指myInitializer类
       </property>  
    </bean>

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