SSH框架整合——基于XML配置文件

SSH框架整合——基于XML配置文件

@(Spring)[spring, struts2, hibernate, 框架整合, ssh, Spring]

  • SSH框架整合基于XML配置文件
    • SSH框架整合
      • SSH框架整合的基本环境准备
        • 第一步创建web项目引入jar包
        • 第二步引入框架的配置文件
        • 第三步创建包结构和类
        • 第四步将Service和DAO交给Spring管理
        • 第五步引入页面
      • SSH整合Struts2和Spring的整合
        • 第六步修改页面链接为Struts2所能匹配的格式
        • 第七步编写Action中的listCustomer方法
        • 第八步Struts2和Spring整合方式一Action由Struts2自身创建
        • 第八步Struts2和Spring整合方式二Action交给Spring管理推荐
        • 第九步在客户Service中使用客户Dao
      • SSH整合Hibernate和Spring的整合
        • 第十步Hibernate和Spring整合方式一带hibernate的配置文件
        • 第十步Hibernate和Spring整合方式二不带hibernate的配置文件推荐
        • 第十一步添加事务管理
    • Hibernate的模板的API
      • 使用Hibernate的模板完成CRUD的操作
        • 完成增删改的操作
        • 完成查询的操作
    • 配置openSessionInView过滤器解决Hibernate懒加载问题
    • 配置全站编码过滤器

SSH框架整合

该SSH整合是基于Spring4、Struts2、Hibernate5的。

SSH框架整合的基本环境准备

第一步:创建web项目,引入jar包

标红为整合必须引入的

  • Struts2

    • struts-2.3.24\apps\struts2-blank\WEB-INF\lib*.jar —Struts2基本开发包
      • SSH框架整合——基于XML配置文件_第1张图片
    • struts2-convention-plugin-2.3.24.jar —Struts2的注解开发包
    • struts2-spring-plugin-2.3.24.jar —Struts2整合Spring的开发包
    • struts2-json-plugin-2.3.24.jar —Struts2整合AJAX的开发包
    • javax.servlet.jsp.jstl-1.2.1.jar — java标准标签库
  • Hibernate

    • mysql-connector-java-5.1.7-bin.jar —数据库驱动
    • hibernate-release-5.0.7.Final\lib\required*.jar —Hibernate必须包
      • SSH框架整合——基于XML配置文件_第2张图片
    • 日志记录
      • 这里写图片描述
    • c3p0连接池
      • 这里写图片描述

注意:在struts2基础包和Hibernate5基础包中javassist-x.jar这个包会有冲突,搭环境时请使用Hibernate中的高版本javassist的包

  • Spring
    • Spring的基本开发包
      • SSH框架整合——基于XML配置文件_第3张图片
    • Spring的AOP的开发包
      • 这里写图片描述
    • Spring整合web项目包:spring-web-4.2.4.RELEASE.jar
    • Spring整合Junit项目包
      • spring-test-4.2.4.RELEASE.jar
      • junit-4.9.jar
    • Spring的JDBC模板包:spring-jdbc-4.2.4.RELEASE.jar
    • Spring事务管理包:spring-tx-4.2.4.RELEASE.jar
    • Spring整合Hibernate:spring-orm-4.2.4.RELEASE.jar
    • 整合c3p0连接池:com.springsource.com.mchange.v2.c3p0-0.9.1.2.jar,需要使用c3p0连接池,可以导入。

如果使用有hibernate配置文件的ssh整合,使用c3p0连接池,需要使用hibernate中c3p0可选包中的三个jar包;
如果使用没有hibernate配置文件的ssh整合,使用c3p0连接池,需要使用spring整合c3p0连接池中的jar包。
两者不可同用,否则会有冲突。

第二步:引入框架的配置文件

  • Struts2
    • web.xml

<filter>
    <filter-name>struts2filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
filter>
<filter-mapping>
    <filter-name>struts2filter-name>
    <url-pattern>/*url-pattern>
filter-mapping>
    • struts.xml


<struts>

struts>
  • Hibernate
    • hibernate.cfg.xml


<hibernate-configuration>
    <session-factory>

    session-factory>
hibernate-configuration>
    • 映射文件


<hibernate-mapping package="">

hibernate-mapping>
  • Spring
    • web.xml

<context-param>
    <param-name>contextConfigLocationparam-name>
    <param-value>classpath:applicationContext.xmlparam-value>
context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
    • applicationContext.xml

<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:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd">

beans>
    • log4j.properties
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c\:mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout

第三步:创建包结构和类

package com.pc.crm.domain;
import java.io.Serializable;
/**
 * 客户实体类
 * @author Switch
 */
public class Customer implements Serializable {
    private static final long serialVersionUID = 8501538130746309236L;
}
package com.pc.crm.web.action;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.pc.crm.domain.Customer;
/**
 * 客户Action
 * @author Switch
 */
public class CustomerAction extends ActionSupport implements ModelDriven<Customer> {
    private static final long serialVersionUID = 7878143682430064108L;
    Customer customer = new Customer();
    @Override
    public Customer getModel() {
        return this.customer;
    }
}
package com.pc.crm.service;
/**
 * 客户服务接口
 * @author Switch
 */
public interface CustomerService {

}
package com.pc.crm.service.impl;
import com.pc.crm.service.CustomerService;
/**
 * 客户服务实现类
 * @author Switch
 */
public class CustomerServiceImpl implements CustomerService {

}
package com.pc.crm.dao;
/**
 * 客户持久层接口
 * @author Switch
 */
public interface CustomerDao {

}
package com.pc.crm.dao.impl;
import com.pc.crm.dao.CustomerDao;
/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl implements CustomerDao {

}

第四步:将Service和DAO交给Spring管理


<bean id="customerService" class="com.pc.crm.service.impl.CustomerServiceImpl">

bean>

<bean id="customerDao" class="com.pc.crm.dao.impl.CustomerDaoImpl">

bean>

第五步:引入页面

这里只给出一个访问链接,基于JSP的。

<a href="${pageContext.request.contextPath}/customer/listCustomer">客户列表a>

SSH整合:Struts2和Spring的整合

第六步:修改页面链接为Struts2所能匹配的格式

<a href="${pageContext.request.contextPath}/customer/list_Customer.action">客户列表a>

第七步:编写Action中的listCustomer方法

package com.pc.crm.web.action;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.pc.crm.domain.Customer;
import com.pc.crm.service.CustomerService;

/**
 * 客户Action
 * @author Switch
 */
public class CustomerAction extends ActionSupport implements ModelDriven<Customer> {
    private static final long serialVersionUID = 7878143682430064108L;
    // 客户服务类
    CustomerService customerService;

    // 用于使用值栈特性,在页面中使用
    List customers = null;
    public List getCustomers() {
        return customers;
    }
    public void setCustomers(List customers) {
        this.customers = customers;
    }

    // 模型驱动
    Customer customer = new Customer();
    @Override
    public Customer getModel() {
        return this.customer;
    }

    /**
     * 显示客户列表
     * @return
     */
    public String listCustomer() {
        // 从数据库中获客户列表
        customers = customerService.findAllCustomer();
        // 转发到客户列表视图
        return "list";
    }
}

第八步:Struts2和Spring整合方式一:Action由Struts2自身创建

  • 引入Struts2和Spring整合的插件包
    • struts2-spring-plugin-2.3.24.jar

该jar包下有一个struts-plugin.xml的文件,在该文件中开启了Spring工厂对Action中的属性按照名称自动装配等功能。


<constant name="struts.objectFactory" value="spring" />

该常量在struts2核心包的default.properties文件中,有如下配置

### if specified, the default object factory can be overridden here
### Note: short-hand notation is supported in some cases, such as "spring"
###       Alternatively, you can provide a com.opensymphony.xwork2.ObjectFactory subclass name here
# struts.objectFactory = spring

### specifies the autoWiring logic when using the SpringObjectFactory.
### valid values are: name, type, auto, and constructor (name is the default)
struts.objectFactory.spring.autoWire = name

### indicates to the struts-spring integration if Class instances should be cached
### this should, until a future Spring release makes it possible, be left as true
### unless you know exactly what you are doing!
### valid values are: true, false (true is the default)
struts.objectFactory.spring.useClassCache = true

### ensures the autowire strategy is always respected.
### valid values are: true, false (false is the default)
struts.objectFactory.spring.autoWire.alwaysRespect = false

### By default SpringObjectFactory doesn't support AOP
### This flag was added just temporally to check if nothing is broken
### See https://issues.apache.org/jira/browse/WW-4110
struts.objectFactory.spring.enableAopSupport = false

struts.objectFactory常量启用时,开启对Spring的一系列支持。比如说按名自动装配。

  • 在Action中不需要使用原来的工厂获取,提供set方法即可。
// 注入客户服务类
CustomerService customerService;

public void setCustomerService(CustomerService customerService) {
    this.customerService = customerService;
}

/**
 * customerService未优化
 */
/* public CustomerAction() {
    ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(ServletActionContext.getServletContext());
    customerService = context.getBean("customerService", CustomerService.class);
}
*/
  • 配置Action:Action是Struts2自身创建
<package name="customer" extends="struts-default" namespace="/customer">
    
    <action name="*_*" class="com.pc.crm.web.action.CustomerAction" method="{1}{2}">
        
        <result name="list" type="dispatcher">/jsp/customer/list.jspresult>
    action>
package>

第八步:Struts2和Spring整合方式二:Action交给Spring管理(推荐)

  • 引入Struts2和Spring整合的插件包

    • struts2-spring-plugin-2.3.24.jar
  • 将Action交给Spring创建



<bean id="customerAction" class="com.pc.crm.web.action.CustomerAction" scope="prototype">
    <property name="customerService" ref="customerService" />
bean>
  • 注意的事项

    • 一定要将Action配置为多例的
    • 属性的注入必须手动完成
  • struts.xml文件中对应actionclass属性为beanid属性

<package name="customer" extends="struts-default" namespace="/customer">
    
    <action name="*_*" class="customerAction" method="{1}{2}">
        
        <result name="list" type="dispatcher">/jsp/customer/list.jspresult>
    action>
package>

第九步:在客户Service中使用客户Dao

package com.pc.crm.service.impl;
import java.util.List;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;
import com.pc.crm.service.CustomerService;
/**
 * 客户服务实现类
 * @author Switch
 */
public class CustomerServiceImpl implements CustomerService {
    // 注入客户Dao
    private CustomerDao customerDao;
    public void setCustomerDao(CustomerDao customerDao) {
        this.customerDao = customerDao;
    }

    @Override
    public List findAllCustomer() {
            // 查找客户列表
            return customerDao.findAllCustomer();
    }
}

<bean id="customerService" class="com.pc.crm.service.impl.CustomerServiceImpl">
    <property name="customerDao" ref="customerDao"/>
bean>

SSH整合:Hibernate和Spring的整合

第十步:Hibernate和Spring整合方式一:带hibernate的配置文件

  • 创建实体类和映射文件Customer.hbm.xml
package com.pc.crm.domain;
import java.io.Serializable;
/**
 * 客户实体类
 * @author Switch
 */
public class Customer implements Serializable {
    private static final long serialVersionUID = 8501538130746309236L;
    private Long custId;
    private String custName;
    private String custSource;
    private String custIndustry;
    private String custLevel;
    private String custAddress;
    private String custPhone;
    ......
}


<hibernate-mapping package="com.pc.crm.domain">
    <class name="Customer" table="cst_customer" lazy="true" batch-size="3">
        <id name="custId" column="cust_id" type="java.lang.Long">
            <generator class="native"/>
        id>

        <property name="custName" column="cust_name" type="java.lang.String" length="32"/>
        <property name="custSource" column="cust_source" type="java.lang.String" length="32"/>
        <property name="custIndustry" column="cust_industry" type="java.lang.String" length="32"/>
        <property name="custLevel" column="cust_level" type="java.lang.String" length="32"/>
        <property name="custAddress" column="cust_address" type="java.lang.String" length="128"/>
        <property name="custPhone" column="cust_phone" type="java.lang.String" length="64"/>
    class>
hibernate-mapping>
  • 配置hibernate.cfg.xml配置文件


<hibernate-configuration>
    <session-factory>
        
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driverproperty>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mycrmproperty>
        <property name="hibernate.connection.username">rootproperty>
        <property name="hibernate.connection.password">123456property>

        
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialectproperty>

        
        
        <property name="hibernate.show_sql">trueproperty>
        
        <property name="hibernate.format_sql">trueproperty>
        
        
        <property name="hibernate.hbm2ddl.auto">updateproperty>

        
        <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProviderproperty>

        
        <mapping resource="com/pc/crm/domain/Customer.hbm.xml" />
        <mapping resource="com/pc/crm/domain/LinkMan.hbm.xml" />
    session-factory>
hibernate-configuration>
  • 在Spring中引入Hibernate的配置文件

<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
    <property name="configLocation" value="classpath:hibernate.cfg.xml"/>
bean>
  • Spring为了简化Hibernate的开发,提供了Hibernate的模板
package com.pc.crm.dao.impl;
import java.util.List;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;
/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public List findAllCustomer() {

    }
}

<bean id="customerDao" class="com.pc.crm.dao.impl.CustomerDaoImpl">
    
    <property name="sessionFactory" ref="sessionFactory"/>
bean>
  • 在客户Dao中使用Hibernate的模板
package com.pc.crm.dao.impl;
import java.util.List;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;

/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public List findAllCustomer() {
        return (List) this.getHibernateTemplate().find("from Customer");
    }
}

第十步:Hibernate和Spring整合方式二:不带hibernate的配置文件(推荐)

  • 创建实体类和映射文件Customer.hbm.xml
package com.pc.crm.domain;
import java.io.Serializable;
/**
 * 客户实体类
 * @author Switch
 */
public class Customer implements Serializable {
    private static final long serialVersionUID = 8501538130746309236L;
    private Long custId;
    private String custName;
    private String custSource;
    private String custIndustry;
    private String custLevel;
    private String custAddress;
    private String custPhone;
    ......
}


<hibernate-mapping package="com.pc.crm.domain">
    <class name="Customer" table="cst_customer" lazy="true" batch-size="3">
        <id name="custId" column="cust_id" type="java.lang.Long">
            <generator class="native"/>
        id>

        <property name="custName" column="cust_name" type="java.lang.String" length="32"/>
        <property name="custSource" column="cust_source" type="java.lang.String" length="32"/>
        <property name="custIndustry" column="cust_industry" type="java.lang.String" length="32"/>
        <property name="custLevel" column="cust_level" type="java.lang.String" length="32"/>
        <property name="custAddress" column="cust_address" type="java.lang.String" length="128"/>
        <property name="custPhone" column="cust_phone" type="java.lang.String" length="64"/>
    class>
hibernate-mapping>
  • 替换hibernate.cfg.xml中的相关内容,将其配置在spring中
    • 提供数据库属性文件db.properties
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mycrm
jdbc.user=root
jdbc.password=123456
    • 配置属性持有对象

<context:property-placeholder location="classpath:db.properties"/>
    • 配置数据源

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="${jdbc.driverClass}"/>
    <property name="jdbcUrl" value="${jdbc.url}"/>
    <property name="user" value="${jdbc.user}"/>
    <property name="password" value="${jdbc.password}"/>
bean>
    • 替换hibernate配置信息

<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
    
    <property name="dataSource" ref="dataSource"/>
    
    <property name="hibernateProperties">
        <props>
            
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialectprop>
            
            <prop key="hibernate.show_sql">trueprop>
            
            <prop key="hibernate.format_sql">trueprop>
            
            <prop key="hibernate.hbm2ddl.auto">updateprop>
        props>
    property>
    
    <property name="mappingLocations" value="classpath:com/pc/crm/domain/*.hbm.xml"/>
bean>
  • Spring为了简化Hibernate的开发,提供了Hibernate的模板
package com.pc.crm.dao.impl;
import java.util.List;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;
/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public List findAllCustomer() {

    }
}

<bean id="customerDao" class="com.pc.crm.dao.impl.CustomerDaoImpl">
    
    <property name="sessionFactory" ref="sessionFactory"/>
bean>
  • 在客户Dao中使用Hibernate的模板
package com.pc.crm.dao.impl;
import java.util.List;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;

/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public List findAllCustomer() {
        return (List) this.getHibernateTemplate().find("from Customer");
    }
}

第十一步:添加事务管理

  • 配置事务管理器

<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
bean>
  • 配置事务通知

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        
        
        <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
        <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
        <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>          
        <tx:method name="*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
    tx:attributes>
tx:advice>
  • 配置事务AOP

<aop:config>
    <aop:pointcut expression="execution(* com.pc.crm.service.impl.*.*(..))" id="pointcut1"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut1"/>
aop:config>

PS:如果需要配置基于注解的事务,请参考之前的博文《Spring事务管理》。

Hibernate的模板的API

使用Hibernate的模板完成CRUD的操作

完成增删改的操作

  • Serializable save(Object obj);
  • void update(Object obj);
  • void delete(Object obj);
package com.pc.crm.dao.impl;
import java.util.List;
import org.hibernate.criterion.DetachedCriteria;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;
/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public void save(Customer customer) {
        this.getHibernateTemplate().save(customer);
    }

    @Override
    public void update(Customer customer) {
        this.getHibernateTemplate().update(customer);
    }

    @Override
    public void delete(Customer customer) {
        this.getHibernateTemplate().delete(customer);
    }
}

完成查询的操作

  • T get(Class c,Serializable id); / T load(Class c,Serializable id);
  • List
package com.pc.crm.dao.impl;
import java.util.List;
import org.hibernate.criterion.DetachedCriteria;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import com.pc.crm.dao.CustomerDao;
import com.pc.crm.domain.Customer;
/**
 * 客户持久层接口实现类
 * @author Switch
 */
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
    @Override
    public Customer findById(Long id) {
        return this.getHibernateTemplate().load(Customer.class, id);
    }

    @Override
    public List findAll() {
        // 使用HQL查询:
        // List list = (List) this.getHibernateTemplate().find("from Customer ");

        // 使用QBC查询:使用DetchedCriteria
        // DetachedCriteria detachedCriteria = DetachedCriteria.forClass(Customer.class);
        // List list = (List) this.getHibernateTemplate().findByCriteria(detachedCriteria);

        // 命名查询:
        List list = (List) this.getHibernateTemplate().findByNamedQuery("queryAll");
        return list;
    }

    @Override
    public List findByPage() {
        DetachedCriteria detachedCriteria = DetachedCriteria.forClass(Customer.class);
        List list = (List) this.getHibernateTemplate().findByCriteria(detachedCriteria, 0, 3);
        return list;
    }
}

配置openSessionInView过滤器,解决Hibernate懒加载问题


<filter>
    <filter-name>OpenSessionInViewFilterfilter-name>
    <filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilterfilter-class>
filter>
<filter-mapping>
    <filter-name>OpenSessionInViewFilterfilter-name>
    <url-pattern>*.actionurl-pattern>
filter-mapping>

PS:将该过滤器放在Struts2核心过滤器上面。

配置全站编码过滤器


<filter>
    <filter-name>CharacterEncodingFilterfilter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
    
    <init-param>
        <param-name>encodingparam-name>
        <param-value>UTF-8param-value>
    init-param>
    
    <init-param>
        <param-name>forceEncodingparam-name>
        <param-value>trueparam-value>
    init-param>
filter>
<filter-mapping>
    <filter-name>CharacterEncodingFilterfilter-name>
    <url-pattern>/*url-pattern>
filter-mapping>

PS:将该过滤器放在Struts2核心过滤器上面。

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