Spring视频学习（十四）Spring提供的CharacterEncoding和OpenSessionInView功能
2009-07-22 19:53
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一、解决乱码
1.新建一个添加的ActionForm：
import org.apache.struts.action.ActionForm;
public class PersonForm extends ActionForm {
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}2.编写添加的页面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <html:form action="/person/manage" method="post"> 名称:<html:text property="name"/> <input type="submit" value="提交"> <input type="hidden" name="method" value="add"> </html:form> <br> </body> </html>
3.编写添加的Action并交给Spring容器管理：
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.persia.model.Person;
import com.persia.service.IPersonService;
import com.persia.struts.formbean.PersonForm;
public class PersonManageAction extends DispatchAction {
@Resource IPersonService ps;
public ActionForward add(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
PersonForm f=(PersonForm)form;
ps.save(new Person(f.getName()));
request.setAttribute("message", "添加成功");
return mapping.findForward("message");
}
}applicationContex.xml添加以下该bean的配置，以方便使用注解：
<bean name="/person/manage" class="com.persia.struts.PersonManageAction"></bean>
4.配置struts-config文件：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> <struts-config> <form-beans> <form-bean name="personForm" type="com.persia.struts.formbean.PersonForm"></form-bean> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings> <action path="/person/list" validate="false"> <forward name="list" path="/WEB-INF/page/personlist.jsp"></forward> </action> <action path="/person/manage" parameter="method" validate="false" scope="request" name="personForm"> <forward name="message" path="/WEB-INF/page/message.jsp"></forward> </action> </action-mappings> <!--定义Spring的请求处理器，来根据action的path属性到Spring容器里面寻找这个bean，若找到了则用这个bean来处理用户的请求--> <controller> <set-property property="processorClass" value="org.springframework.web.struts.DelegatingRequestProcessor"/> </controller> <!--配置完Spring的请求处理器后，去掉action的type属性和值，因为已经交给Spring容器来处理（可选）当Spring处理器找不到该bean时，才会使用Struts的action--> <message-resources parameter="com.persia.struts.ApplicationResources" /> </struts-config>
5.新建message.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>result</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
${message} <br>
</body>
</html>6.配置web.xml来避免中文乱码：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <!--1.指定spring的配置文件，默认从web的根目录开始查找，可以通过spring提供的classpath前缀来配置从类路径开始查找 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!--2.对Spring容器进行实例化 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--以上 2个步骤即实现了在web容器中实例化spring容器的配置，实例化后放到servletContext里面（Application级别）--> <!--以下是由Spring提供的filter来解决Struts乱码问题 --> <filter> <filter-name>encoding</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> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 解决乱码 --> <!-- 使用Spring解决Hiberante因session关闭导致的延迟例外问题 --> <filter> <filter-name>OpenSessionInViewFilter</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>OpenSessionInViewFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 解决延迟加载例外问题 --> <!--下面是集成Struts的配置--> <servlet> <servlet-name>action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>3</param-value> </init-param> <init-param> <param-name>detail</param-name> <param-value>3</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!--以上是集成struts的配置，然后在web-inf下配置struts-config.xml--> </web-app>
二、解决延迟例外
上面的OpenSessionInViewFilter就是解决Hiberante因session关闭导致的延迟例外问题：
<!-- 使用Spring解决Hiberante因session关闭导致的延迟例外问题 --> <filter> <filter-name>OpenSessionInViewFilter</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>OpenSessionInViewFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 解决延迟加载例外问题 -->
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