J2EE项目：整合SSH开发『新闻发布系统』

来源：互联网发布：centos vsftpd 端口编辑：程序博客网时间：2024/06/06 00:02

一、架构

Struts+Spring+Hibernate

二、Hibernate持久层

1.编写PO类

====================================================================================

package org.prolove.model;

import java.io.Serializable;

/**

* Base class for Model objects. Child objects should implement toString(),

* equals() and hashCode();

* <p>

* <a href="BaseObject.java.html"><i>View Source</i></a>

* </p>

* @author <a href="mailto:prolove@live.cn">PROLOVE</a>

public abstract class BaseObject implements Serializable {

public abstract String toString();

public abstract boolean equals(Object o);

public abstract int hashCode();

}

====================================================================================

package org.prolove.model;

import java.util.Date;

import java.util.Set;

import org.apache.commons.lang.builder.EqualsBuilder;

import org.apache.commons.lang.builder.HashCodeBuilder;

import org.apache.commons.lang.builder.ToStringBuilder;

/**

* @hibernate.class table="news"

* @struts.form include-all="false" extends="BaseForm"

public class News extends BaseObject {

private Long id;// pk,required

private String title;// required

private String content;// required

private User poster;// fk,required

private Date postDate;// required

private Date lastModifyDate;// required

private Category category;// required

private Set newsReviews;

public News() {

}

/**

* @return Returns the newsReview.

public Set getNewsReviews() {

return newsReviews;

}

/**

* @param newsReview

* The newsReview to set.

public void setNewsReviews(Set newsReviews) {

this.newsReviews = newsReviews;

}

/**

* @hibernate.many-to-one column="id" not-null="true"

public Category getCategory() {

return category;

}

public void setCategory(Category category) {

this.category = category;

}

/**

* @hibernate.property column="last_modify_date" not-null="true"

public Date getLastModifyDate() {

return lastModifyDate;

}

public void setLastModifyDate(Date lastModifyDate) {

this.lastModifyDate = lastModifyDate;

}

/**

* @hibernate.property column="post_date" not-null="true"

public Date getPostDate() {

return postDate;

}

public void setPostDate(Date postDate) {

this.postDate = postDate;

}

/**

* @hibernate.many-to-one column="username" not-null="true"

public User getPoster() {

return poster;

}

public void setPoster(User poster) {

this.poster = poster;

}

/**

* @hibernate.property column="content" length="3000" not-null="true"

public String getContent() {

return content;

}

public void setContent(String content) {

this.content = content;

}

/**

* @return Returns the id.

* @hibernate.id column="id" generator-class="increment"

* unsaved-value="null"

public Long getId() {

return id;

}

public void setId(Long id) {

this.id = id;

}

/**

* @hibernate.property column="title" length="50" not-null="true"

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

/**

* @see java.lang.Object#equals(Object)

public boolean equals(Object object) {

if (!(object instanceof News)) {

return false;

}

News rhs = (News) object;

return this.poster.equals(rhs.getPoster())

&& this.postDate.equals(rhs.getPostDate());

* return new EqualsBuilder().append(this.newsReviews, rhs.newsReviews)

* .append(this.title, rhs.title).append(this.category,

* rhs.category).append(this.content, rhs.content).append(

* this.postDate, rhs.postDate).append( this.lastModifyDate,

* rhs.lastModifyDate).append( this.id, rhs.id).append(this.poster,

* rhs.poster) .isEquals();

}

/**

* @see java.lang.Object#hashCode()

public int hashCode() {

return this.poster.hashCode() + this.postDate.hashCode();

* return new HashCodeBuilder(1595611275, -1477459617).append(

* this.newsReviews).append(this.title).append(this.category)

* .append(this.content).append(this.postDate).append(

* this.lastModifyDate).append(this.id)

* .append(this.poster).toHashCode();

}

/**

* @see java.lang.Object#toString()

public String toString() {

return new ToStringBuilder(this).append("id", this.id).append("title",

this.title).append("postDate", this.postDate).append("content",

this.content).append("lastModifyDate", this.lastModifyDate)

.append("poster", this.poster)

.append("category", this.category).append("newsReviews",

this.newsReviews).toString();

}

2.编写PO的映射配置文件

====================================================================================

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

</generator>

</id>

<many-to-one name="category" class="org.prolove.model.Category" column="category_id" not-null="true">

</many-to-one>

</property>

</property>

<many-to-one name="poster" column="username" not-null="true">

</many-to-one>

</property>

</property>

@hibernate.list lazy="true" inverse="false" cascade="none"

@hibernate.collection-key column="id"

@hibernate.collection-one-to-many class="org.prolove.model.NewsReview"

</meta>

<key>

</key>

<one-to-many class="org.prolove.model.NewsReview" />

</set>

</class>

</hibernate-mapping>

3.连接数据库

applicationContext-hibernate.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

<list>

<value>org/prolove/model/User.hbm.xml</value>

<value>org/prolove/model/News.hbm.xml</value>

<value>org/prolove/model/NewsReview.hbm.xml</value>

<value>org/prolove/model/Category.hbm.xml</value>

</list>

</property>

<!-- The property below is commented out b/c it doesn't work when run via

Ant in Eclipse. It works fine for individual JUnit tests and in IDEA ??

<list><value>file:dist/appfuse-dao.jar</value></list>

</property>

-->

<props>

<prop key="hibernate.dialect">@HIBERNATE-DIALECT@</prop>

<!-- Create/update the database tables automatically when the JVM starts up

<prop key="hibernate.hbm2ddl.auto">update</prop> -->

<!-- Turn batching off for better error messages under PostgreSQL

</props>

</property>

</bean>

</bean>

</bean>

</bean>

</bean>

</bean>

</bean>

</bean>

</beans>

=====================================================================

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

<list>

<value>org/prolove/model/User.hbm.xml</value>

<value>org/prolove/model/News.hbm.xml</value>

<value>org/prolove/model/NewsReview.hbm.xml</value>

<value>org/prolove/model/Category.hbm.xml</value>

</list>

</property>

<props>

<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>

<prop key="hibernate.hbm2ddl.auto">update</prop>

</props>

</property>

</bean>

</bean>

<bean id="txProxyTemplate" abstract="true"

class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">

<props>

<prop key="save*">PROPAGATION_REQUIRED</prop>

<prop key="remove*">PROPAGATION_REQUIRED</prop>

<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>

</props>

</property>

</bean>

</bean>

</property>

</bean>

</beans>

三、DAO组件层

1.DAO组件的结构

为了让逻辑组件与具体的DAO组件分离，还必须有一个DAO工厂。

2.编写DAO接口

package org.prolove.dao;

import java.io.Serializable;

import java.util.List;

/**

* Data Access Object (DAO) interface. This is an interface

* used to tag our DAO classes and to provide common methods to all DAOs.

* <p><a href="DAO.java.html"><i>View Source</i></a></p>

* @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>

public interface DAO {

/**

* Generic method used to get all objects of a particular type. This

* is the same as lookup up all rows in a table.

* @param clazz the type of objects (a.k.a. while table) to get data from

* @return List of populated objects

public List getObjects(Class clazz);

/**

* Generic method to get an object based on class and identifier. An

* ObjectRetrievalFailureException Runtime Exception is thrown if

* nothing is found.

* @param clazz model class to lookup

* @param id the identifier (primary key) of the class

* @return a populated object

* @see org.springframework.orm.ObjectRetrievalFailureException

public Object getObject(Class clazz, Serializable id);

/**

* Generic method to save an object - handles both update and insert.

* @param o the object to save

public void saveObject(Object o);

/**

* Generic method to delete an object based on class and id

* @param clazz model class to lookup

* @param id the identifier (primary key) of the class

public void removeObject(Class clazz, Serializable id);

}

=========================================================================

package org.prolove.dao;

import java.util.List;

import org.prolove.model.User;

/**

* User Data Access Object (DAO) interface.

* <p>

* <a href="UserDAO.java.html"><i>View Source</i></a>

* </p>

* @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>

public interface UserDAO extends DAO {

/**

* Gets users information based on login name.

* @param username the current username

* @return user populated user object

public User getUser(String username);

/**

* Gets a list of users based on parameters passed in.

* @return List populated list of users

public List getUsers(User user);

/**

* Saves a user's information

* @param user the object to be saved

public void saveUser(User user);

/**

* Removes a user from the database by id

* @param username the user's username

public void removeUser(String username);

}

……

3.编写DAO的具体实现

package org.prolove.dao.hibernate;

import java.io.Serializable;

import java.util.List;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.orm.ObjectRetrievalFailureException;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import org.prolove.dao.DAO;

/**

* This class serves as the Base class for all other DAOs - namely to hold

* common methods that they might all use. Can be used for standard CRUD

* operations.</p>

* <p><a href="BaseDAOHibernate.java.html"><i>View Source</i></a></p>

* @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>

public class BaseDAOHibernate extends HibernateDaoSupport implements DAO {

protected final Log log = LogFactory.getLog(getClass());

/**

* @see org.leecode.dao.DAO#saveObject(java.lang.Object)

public void saveObject(Object o) {

getHibernateTemplate().saveOrUpdate(o);

}

/**

* @see org.leecode.dao.DAO#getObject(java.lang.Class, java.io.Serializable)

public Object getObject(Class clazz, Serializable id) {

Object o = getHibernateTemplate().get(clazz, id);

if (o == null) {

throw new ObjectRetrievalFailureException(clazz, id);

}

return o;

}

/**

* @see org.leecode.dao.DAO#getObjects(java.lang.Class)

public List getObjects(Class clazz) {

return getHibernateTemplate().loadAll(clazz);

}

/**

* @see org.leecode.dao.DAO#removeObject(java.lang.Class, java.io.Serializable)

public void removeObject(Class clazz, Serializable id) {

getHibernateTemplate().delete(getObject(clazz, id));

}

======================================================================================

package org.prolove.dao.hibernate;

import org.springframework.orm.ObjectRetrievalFailureException;

import org.prolove.dao.NewsDAO;

import org.prolove.model.News;

public class NewsDAOHibernate extends BaseDAOHibernate implements NewsDAO {

public News getNews(Long id) {

News news = (News) getHibernateTemplate().get(News.class, id);

if (news == null) {

throw new ObjectRetrievalFailureException(News.class, id);

}

return news;

}

public void saveNews(News news) {

getHibernateTemplate().saveOrUpdate(news);

}

public void removeNews(Long id) {

// object must be loaded before it can be deleted

getHibernateTemplate().delete(getNews(id));

}

……

4.用Spring容器代替DAO工厂

见上文applicationContext-hibernate.xml

以及

daoContext.xml

<?xml version="1.0" encoding="GBK"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

<bean id="dao" class="org.prolove.dao.hibernate.BaseDAOHibernate"

parent="daoTemplate"/>

<bean id="userDAO" class="org.prolove.dao.hibernate.UserDAOHibernate"

parent="daoTemplate"/>

<bean id="newsDAO" class="org.prolove.dao.hibernate.NewsDAOHibernate"

parent="daoTemplate"/>

<bean id="newsReviewDAO" class="org.prolove.dao.hibernate.NewsReviewDAOHibernate"

parent="daoTemplate"/>

<bean id="categoryDAO" class="org.prolove.dao.hibernate.CategoryDAOHibernate"

parent="daoTemplate"/>

</beans>

四、业务逻辑层

1.业务逻辑组件的结构

每个模块设计一个业务逻辑组件。

2.业务逻辑组件的接口

package org.prolove.service;

import java.util.List;

import org.prolove.dao.CategoryDAO;

import org.prolove.dao.NewsDAO;

import org.prolove.dao.NewsReviewDAO;

import org.prolove.dao.UserDAO;

import org.prolove.model.Category;

import org.prolove.model.News;

import org.prolove.model.NewsReview;

import org.prolove.model.User;

//该接口是对DAO的正面包装

public interface FacadeManager {

// category的业务方法

public void setCategoryDAO(CategoryDAO dao);

public Category getCategory(String id);

public void saveCategory(Category category);

public void removeCategory(String id);

public List getCategories();

// news的业务方法

public void setNewsDAO(NewsDAO dao);

public News getNews(String id);

public void saveNews(News news);

public void removeNews(String id);

// newsReview的业务方法

public void setNewsReviewDAO(NewsReviewDAO dao);

public NewsReview getNewsReview(String id);

public void saveNewsReview(NewsReview newsReview);

public void removeNewsReview(String id);

// user的业务方法

public void setUserDAO(UserDAO dao);

public User getUser(String username);

public List getUsers(User user);

public void saveUser(User user) throws Exception;

public void removeUser(String username);

public boolean validateUser(User user);

}

3.业务逻辑组件的实现类

package org.prolove.service;

import java.io.Serializable;

import java.util.List;

import org.prolove.dao.DAO;

public interface Manager {

/**

* Expose the setDAO method for testing purposes

* @param dao

public void setDAO(DAO dao);

/**

* Generic method used to get a all objects of a particular type.

* @param clazz the type of objects

* @return List of populated objects

public List getObjects(Class clazz);

/**

* Generic method to get an object based on class and identifier.

* @param clazz model class to lookup

* @param id the identifier (primary key) of the class

* @return a populated object

* @see org.springframework.orm.ObjectRetrievalFailureException

public Object getObject(Class clazz, Serializable id);

/**

* Generic method to save an object.

* @param o the object to save

public void saveObject(Object o);

/**

* Generic method to delete an object based on class and id

* @param clazz model class to lookup

* @param id the identifier of the class

public void removeObject(Class clazz, Serializable id);

}

package org.prolove.service.impl;

import java.io.Serializable;

import java.util.List;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.prolove.dao.DAO;

import org.prolove.service.Manager;

/**

* Base class for Business Services - use this class for utility methods and

* generic CRUD methods.

* <p><a href="BaseManager.java.html"><i>View Source</i></a></p>

* @author <a href="mailto:prolove@live.cn">Matt Raible</a>

public class BaseManager implements Manager {

protected DAO dao = null;

protected final Log log = LogFactory.getLog(getClass());

/**

* @see org.leecode.service.Manager#setDAO(org.leecode.dao.DAO)

public void setDAO(DAO dao) {

this.dao = dao;

}

/**

* @see org.leecode.service.Manager#getObject(java.lang.Class, java.io.Serializable)

public Object getObject(Class clazz, Serializable id) {

return dao.getObject(clazz, id);

}

/**

* @see org.leecode.service.Manager#getObjects(java.lang.Class)

public List getObjects(Class clazz) {

return dao.getObjects(clazz);

}

/**

* @see org.leecode.service.Manager#removeObject(java.lang.Class, java.io.Serializable)

public void removeObject(Class clazz, Serializable id) {

dao.removeObject(clazz, id);

}

/**

* @see org.leecode.service.Manager#saveObject(java.lang.Object)

public void saveObject(Object o) {

dao.saveObject(o);

}

package org.prolove.service.impl;

import java.util.List;

import org.springframework.dao.DataIntegrityViolationException;

import org.prolove.dao.CategoryDAO;

import org.prolove.dao.NewsDAO;

import org.prolove.dao.NewsReviewDAO;

import org.prolove.dao.UserDAO;

import org.prolove.model.Category;

import org.prolove.model.News;

import org.prolove.model.NewsReview;

import org.prolove.model.User;

import org.prolove.service.FacadeManager;

public class FacadeManagerImpl extends BaseManager implements

FacadeManager {

private CategoryDAO categoryDAO;

private NewsDAO newsDAO;

private NewsReviewDAO newsReviewDAO;

private UserDAO userDAO;

public void setCategoryDAO(CategoryDAO categoryDAO) {

this.categoryDAO = categoryDAO;

}

public Category getCategory(String id) {

return categoryDAO.getCategory(Long.valueOf(id));

}

public void saveCategory(Category category) {

categoryDAO.saveCategory(category);

}

public void removeCategory(String id) {

categoryDAO.removeCategory(Long.valueOf(id));

}

public List getCategories() {

return categoryDAO.getCategories();

}

public void setNewsDAO(NewsDAO newsDAO) {

this.newsDAO = newsDAO;

}

public News getNews(String id) {

return newsDAO.getNews(Long.valueOf(id));

}

public void saveNews(News news) {

newsDAO.saveNews(news);

}

public void removeNews(String id) {

newsDAO.removeNews(Long.valueOf(id));

}

public void setNewsReviewDAO(NewsReviewDAO newsReviewDAO) {

this.newsReviewDAO = newsReviewDAO;

}

public NewsReview getNewsReview(String id) {

return newsReviewDAO.getNewsReview(Long.valueOf(id));

}

public void saveNewsReview(NewsReview newsReview) {

newsReviewDAO.saveNewsReview(newsReview);

}

public void removeNewsReview(String id) {

newsReviewDAO.removeNewsReview(Long.valueOf(id));

}

public void setUserDAO(UserDAO userDAO) {

this.userDAO = userDAO;

}

public User getUser(String username) {

return userDAO.getUser(username);

}

public List getUsers(User user) {

return userDAO.getUsers(user);

}

public void saveUser(User user) throws Exception {

try {

userDAO.saveUser(user);

} catch (DataIntegrityViolationException e) {

throw new Exception("User '" + user.getUsername()

+ "' already exists!");

}

public void removeUser(String username) {

userDAO.removeUser(username);

}

public boolean validateUser(User aUser) {

User user = getUser(aUser.getUsername());

if (user != null && user.getPassword().equals(aUser.getPassword()))

return true;

else

return false;

}

4.业务逻辑组件的配置

在applicationContext.xml配置FacadeManager组件

五、Web层设计

1.Action的实现

package org.prolove.action;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.ActionForward;

import org.apache.struts.validator.DynaValidatorForm;

import org.prolove.action.base.BaseAction;

import org.prolove.webapp.util.AppConstants;

import org.prolove.model.*;

import java.util.*;

/**

* @author PROLOVE prolve@live.cn

* @version 1.0

* <br>Copyright (C), 2006-2008, PROLOVE

* <br>This program is protected by copyright laws.

* <br>Program Name:

* <br>Date:

public class AddReviewAction extends BaseAction

{

//必须重写该核心方法，该方法actionForm将表单的请求参数封装成值对象

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)throws Exception

{

DynaValidatorForm addForm = (DynaValidatorForm)form;

String content = (String)addForm.get("content");

String newsId = (String)addForm.get("newsId");

try

{

News news = mgr.getNews(newsId);

String username = (String)request.getSession(true).getAttribute(AppConstants.LOGIN_USER);

User poster = mgr.getUser(username);

NewsReview newsReview = new NewsReview();

newsReview.setNews(news);

newsReview.setPoster(poster);

newsReview.setContent(content);

newsReview.setPostDate(new Date());

newsReview.setLastModifyDate(new Date());

mgr.saveNewsReview(newsReview);

}

catch (Exception e)

{

request.setAttribute("newsId" , newsId);

return mapping.findForward("failure");

}

request.setAttribute("newsId" , newsId);

return mapping.findForward("success");

}

package org.prolove.action;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.ActionForward;

import org.apache.struts.validator.DynaValidatorForm;

import org.prolove.action.base.BaseAction;

import org.prolove.model.News;

import java.util.Set;

/**

* @author PROLOVE prolve@live.cn

* @version 1.0

* <br>Copyright (C), 2006-2008, PROLOVE

* <br>This program is protected by copyright laws.

* <br>Program Name:

* <br>Date:

public class LoadReviewsByNews extends BaseAction

{

//必须重写该核心方法，该方法actionForm将表单的请求参数封装成值对象

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)throws Exception

{

String newsId = null;

if(request.getAttribute("newsId") == null)

{

newsId = request.getParameter("newsId");

}

else

{

newsId = (String)request.getAttribute("newsId");

}

News news = mgr.getNews(newsId);

request.setAttribute("news" , news);

request.setAttribute("reviews",news.getNewsReviews());

return mapping.findForward("success");

}

……

2.Spring管理容器Action

采用DelegatingRequestProcessor的整合策略。

struts-config.xml

<?xml version="1.0" encoding="GBK"?>

<!DOCTYPE struts-config PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"

"http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>

<form-beans>

<form-bean name="loginForm" type="org.apache.struts.validator.DynaValidatorForm">

<form-property name="user" type="java.lang.String" />

<form-property name="pass" type="java.lang.String" />

</form-bean>

<form-bean name="addNewsForm" type="org.apache.struts.validator.DynaValidatorForm">

<form-property name="title" type="java.lang.String" />

<form-property name="content" type="java.lang.String" />

<form-property name="categoryId" type="java.lang.String" />

</form-bean>

<form-bean name="addNewsReviewForm" type="org.apache.struts.validator.DynaValidatorForm">

<form-property name="content" type="java.lang.String" />

<form-property name="newsId" type="java.lang.String" />

</form-bean>

</form-beans>

<global-forwards>

</global-forwards>

<action-mappings>

<action path="/processLogin"

name="loginForm"

scope="request"

validate="true"

input="input">

</action>

</action>

</action>

</action>

<action path="/addNews"

name="addNewsForm"

scope="request"

validate="true"

input="input">

</action>

</action>

<action path="/addNewsReview"

name="addNewsReviewForm"

scope="request"

validate="true"

input="input">

</action>

</action-mappings>

<message-resources parameter="resource"/>

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">

<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,

/WEB-INF/validation.xml"/>

<set-property property="stopOnFirstError" value="true"/>

</plug-in>

<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">

<set-property property="contextConfigLocation" value="/WEB-INF/daoContext.xml,

/WEB-INF/applicationContext.xml,

/WEB-INF/action-Servlet.xml"/>

</plug-in>

</struts-config>

action-Servlet.xml

<?xml version="1.0" encoding="GBK"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

</beans>

3.数据校验的选择

validation.xml

<?xml version="1.0" encoding="iso-8859-1"?>

<!DOCTYPE form-validation PUBLIC

"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN"

"http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd">

<form-validation>

<var>

<var-name>minlength</var-name>

<var-value>4</var-value>

</var>

</field>

<var>

<var-name>minlength</var-name>

<var-value>4</var-value>

</var>

</field>

</form>

</field>

</field>

</field>

</form>

</field>

</field>

</form>

</formset>

</form-validation>

4.访问权限的控制

package org.prolove.webapp.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.prolove.webapp.util.AppConstants;

/**

* 设置字符集、过滤未登录的非法请求

public class UserLoginFilter implements Filter {

protected String encoding = null;

protected FilterConfig filterConfig = null;

protected boolean ignore = false;

protected String forwardPath = null;

public void destroy() {

this.encoding = null;

this.filterConfig = null;

}

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

// 设置编码方式，web.xml里面有filter参数的初始化设置

if (ignore || (request.getCharacterEncoding() == null)) {

String encoding = selectEncoding(request);

if (encoding != null)

request.setCharacterEncoding(encoding);

}

HttpServletRequest httpServletRequest = (HttpServletRequest) request;

HttpServletResponse httpServletResponse = (HttpServletResponse) response;

String requesturi = httpServletRequest.getRequestURI();

// 通过检查session中的变量，过虑请求

HttpSession session = httpServletRequest.getSession();

Object currentUser = session.getAttribute(AppConstants.LOGIN_USER);

// 当前会话用户为空而且不是请求登录，退出登录，欢迎页面和根目录则退回到应用的根目录

if (currentUser == null

&& !requesturi.endsWith("/processLogin.do")

&& !requesturi.endsWith("/logout.do")

&& !requesturi.endsWith("/index.jsp")

&& !requesturi.endsWith(httpServletRequest.getContextPath()

+ "/")) {

httpServletResponse.sendRedirect(httpServletRequest

.getContextPath()

+ "/");

return;

}

chain.doFilter(request, response);

}

public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;

this.encoding = filterConfig.getInitParameter("encoding");

this.forwardPath = filterConfig.getInitParameter("forwardpath");

String value = filterConfig.getInitParameter("ignore");

if (value == null)

this.ignore = true;

else if (value.equalsIgnoreCase("true"))

this.ignore = true;

else if (value.equalsIgnoreCase("yes"))

this.ignore = true;

else

this.ignore = false;

}

protected String selectEncoding(ServletRequest request) {

return (this.encoding);

}

5.解决中文编码问题

代码同上，另

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"

version="2.4">

<filter-name>Login Filter</filter-name>

<filter-class>

org.prolove.webapp.filter.UserLoginFilter

</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>GBK</param-value>

</init-param>

<init-param>

<param-name>ignore</param-name>

<param-value>false</param-value>

</init-param>

<init-param>

<param-name>forwardpath</param-name>

<param-value>index.jsp</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>Login Filter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<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>

<load-on-startup>2</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>action</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

<jsp-config>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

<taglib-uri>/tags/struts-bean</taglib-uri>

<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>

</taglib>

<taglib-uri>/tags/struts-html</taglib-uri>

<taglib-location>/WEB-INF/struts-html.tld</taglib-location>

</taglib>

<taglib-uri>/tags/struts-logic</taglib-uri>

<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>

</taglib>

</jsp-config>

</web-app>

6.JSP页面输出

-->main.jsp

<%@ page language="java" contentType="text/html;charset=GBK"%>

<%@ include file="taglibs.jsp"%>

<html>

<head>

</head>

function verifyValue(){

if(loadNewsForm.categoryId.checked)

{

loadNewsForm.submit();

return true;

}

for (var i = 0 ; i < loadNewsForm.categoryId.length ; i++)

{

if( loadNewsForm.categoryId[i].checked )

{

loadNewsForm.submit();

return true;

}

alert('请选择要查看的版面！');

return false;

}

function logout(){

logoutForm.submit();

}

</script>

<body>

<tr>

</td>

</tr>

<tr>

请选择

</td>

版面名

</td>

</tr>

<logic:iterate id="item" name="categories" indexId="index" scope="request">

<tr>

</td>

<bean:write name="item" property="name"/>

</td>

</tr>

</logic:iterate>

<tr>

</td>

</tr>

</form>

</form>

</table>

</body>

</html>

-->index.jsp

<%@ page language="java" contentType="text/html;charset=GBK"%>

<%@ include file="taglibs.jsp"%>

<html>

<head>

</head>

<body>

<logic:messagesPresent>

<bean:message key="errors.header"/>

<ul>

<html:messages id="error">

</html:messages>

</ul>

</div>

</logic:messagesPresent>

<logic:present name="errMsg">

</div>

</logic:present>

<logic:present name="logout">

</div>

</logic:present>

<html:form action="/processLogin">

<tr>

<td>

请输入用户名：

</td>

<td>

<html:text property="user" size="20"/>

</td>

</tr>

<tr>

<td>

请输入密码：

</td>

<td>

</td>

</tr>

<tr>

</td>

</tr>

</html:form>

</table>

</body>

</html>

-->category_view.jsp

<%@ page language="java" contentType="text/html;charset=GBK"%>

<%@ include file="taglibs.jsp"%>

<html>

<head>

</head>

function verifyValue(){

if(loadNewsForm.newsId.checked)

{

loadNewsForm.submit();

return true;

}

for (var i = 0 ; i < loadNewsForm.newsId.length ; i++)

{

if( loadNewsForm.newsId[i].checked )

{

loadNewsForm.submit();

return true;

}

alert('请选择要查看的新闻！');

return false;

}

function goMain(){

mainForm.submit();

}

</script>

<body>

<tr>

</tr>

<tr>

请选择 </td>

主题 </td>

发布人 </td>

发布时间 </td>

最后评论时间 </td>

</tr>

<logic:iterate id="item" name="news" indexId="index" scope="request">

<tr>

</td>

<bean:write name="item" property="title"/>

</td>

<bean:write name="item" property="content"/>

</td>

<bean:write name="item" property="postDate"/>

</td>

<bean:write name="item" property="lastModifyDate"/>

</td>

</tr>

</logic:iterate>

<tr>

</tr>

<tr>

</tr>

<tr>

<td height="25" colspan="6" align="center">发表新的新闻</td>

</tr>

</form>

<html:form action="/addNews">

<tr>

主题： </td>

</tr>

<tr>

<html:text property="title" size="80"/>

</td>

</tr>

<tr>

内容： </td>

</tr>

<tr>

<html:textarea property="content" cols="80" rows="20"></html:textarea> </td>

</tr>

<tr>

</tr>

</html:form>

</form>

</table>

</body>

</html>

-->news_view.jsp

<%@ page language="java" contentType="text/html;charset=GBK"%>

<%@ include file="taglibs.jsp"%>

<html>

<head>

<title>新闻详细内容</title>

</head>

function verifyValue(){

if(addNewsReviewForm.content.value == ""){

alert('请输入评论内容！');

addNewsReviewForm.content.focus();

return false;

}

addNewsReviewForm.submit();

}

function goMain(){

mainForm.submit();

}

</script>

<body>

<tr>

</tr>

<tr>

</tr>

<tr>

<td colspan="2" align="center" bgcolor="#999999">所有评论如下：</td>

</tr>

<logic:iterate id="item" name="reviews" indexId="index" scope="request">

<tr>

<td colspan="2" bgcolor="#96dede">由网友${item.poster.username}于<bean:write name="item" property="postDate"/>发表的评论如下：</td>

</tr>

<tr>

</tr>

</logic:iterate>

<html:form action="/addNewsReview">

<tr>

<tr>

</tr>

<tr>

</tr>

</html:form>

</form>

</table>

</body>

</html>