【求助】JSP页面调用action方法，页面只能传参到Bean，action里面的方法不响应

求助各位大神！我刚开始入门，写了一个信息管理系统，用的Spring+Struts2+myBatis+Bootstrap界面。
我实现增.删.查的功能都正常，就改功能不行。但是，我改功能的代码和增功能的代码几乎一模一样。但是就是报错，我打调试信息看，发现增功能，可以正常从前台传参到Bean，再主动跳转到Action里面的add()，但是改功能就是不行，只能走到传参到Bean，但是没有跳转到update()，因为不跳转到update()处理，所以就报图一的错误。页面只有赋值取值，没有update()响应。
问题的关键就在于，add.jsp和update.jsp除了action关联的函数，<input>标签一个没有value先取值，一个有value取值之外，没有任何区别，真是没有区别，我还怕写错了，专门用BeyondCompare比对了，就<form action="">这个地方不一样，后附BC对比图。我试着把<form>里面的action从update改成add，也不行，改过之后就成add()不响应了，改成谁，谁不响应。
萌新学识疏浅，实在实在找不到哪里写错了，各位大神能不能指导一下！谢谢！
（如果放错版区了，还请版主帮忙更正一下，谢谢版主！）

代码如下：

BiYeXinXiAction：
..........
public String add() {
result = biYeXinXiService.insert(biYeXinXi);
backurl = "biYeXinXi/add.jsp";
return "result-jsp";
}
public String update() {
result = biYeXinXiService.update(biYeXinXi);
backurl = "front/biYeXinXi_intoUpdate.action?biYeXinXi.biyedanganid=" + biYeXinXi.getBiyedanganid();
return "result-jsp";
}
..........

add.jsp：写不下了，见附件图

update.jsp：写不下了，见附件图

struts.xml：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.devMode" value="true" />
<constant name="struts.objectFactory" value="spring" />
<constant name="struts.i18n.encoding" value="UTF-8" />
<constant name="struts.ui.theme" value="simple" />
<constant name="struts.locale" value="zh_CN" />
<constant name="struts.multipart.maxSize" value="20971520" />
<constant name="struts.action.extension" value="action,do," />
<package name="front" extends="json-default" namespace="/front">
<action name="biyexinxi_*" class="biYeXinXiAction" method="{1}">
<result name="result-json" type="json">
<param name="root">result</param>
</result>
<result name="result-jsp">/biyexinxi/result.jsp</result>
<result name="index">/biyexinxi/index.jsp</result>
<result name="intoUpdate">/biyexinxi/update.jsp</result>
</action>
..............

springconfig.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>org.logicalcobwebs.proxool.ProxoolDriver</value>
</property>
<property name="url">
<value>proxool.db</value>
</property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="myDataSource" />
<property name="typeAliasesPackage" value="com.bysmis" />
<property name="plugins">
<list>
<bean class="com.core.code.util.PagingPlugin">
<property name="dialect" value="mysql" />
</bean>
</list>
</property>
</bean>
<bean name="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bysmis.persistence" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="myDataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>

bean.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<context:component-scan base-package="com.bysmis" />
</beans>