基于struts2+hibernate框架实现CRUD的简单的新闻管理系统

本文详细介绍了一个使用Struts2和Hibernate框架整合的新闻管理系统案例，涵盖了开发环境配置、核心文件解析、实体类定义、DAO层实现及过滤器设置。通过具体代码示例，展示了如何在Eclipse环境下搭建Tomcat服务器，连接MySQL数据库，并实现新闻的增删改查功能。

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开发工具:eclipse

数据库:MySQL

服务器:tomcat7.0

配置web.xml :

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>struts-hibernate-CRUD</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  
  <filter-name>SetCharacterEncodingFilter</filter-name>
    <filter-class>filter.SetCharacterEncodingFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>SetCharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <filter>
  	<filter-name>struts2</filter-name>
  	<!-- <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  -->
  	<filter-class>filter.UeditorFilter</filter-class>
  </filter>
  <filter-mapping>
  <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

配置struts：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
   "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
   "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<constant name = "struts.devMode" value = "true" />
<!--	<constant name="struts.action.excludePattern" value="/ueditor/.*" /> -->
	<package name = "strutsNewsWorld" extends = "hibernate-default" namespace="/">

    <!--显示新闻-->
      <action name = "listAll" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/list_news.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <action name = "showNews" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/index.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
     
      <action name = "news1" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/news.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
     
      <action name = "news2" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/news2.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <action name = "news3" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/news3.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <action name = "news4" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/news4.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <action name = "new" class = "com.zz.action.NewsAction" method = "listAll">
         <result name = "success">/article.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      
      
      
   <!--添加新闻-->
     <action name = "insertNews" class = "com.zz.action.NewsAction" method = "insertNews">
         <result name = "success" type="chain">listAll</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
        <!--查询新闻-->
      <action name = "findNews" class = "com.zz.action.NewsAction" method = "findById">
         <result name = "success">/updatenews.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
       <action name = "getNews" class = "com.zz.action.NewsAction" method = "findById">
         <result name = "success">/article.jsp</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <!--修改新闻-->
      <action name = "updateNews" class = "com.zz.action.NewsAction" method = "updateNews">
         <result name = "success" type="chain">listAll</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
      <!--删除新闻-->
      <action name = "deleteNews" class = "com.zz.action.NewsAction" method = "deleteNews">
         <result name = "success" type="chain">listAll</result>
         <result name = "error"> /Error.jsp</result>
      </action>
      
 	<!--登陆-->
       <action name="login" class="com.zz.action.LoginAction" method="execute">
            <result name="success" type="chain">listAll</result>
            <result name="error">/login.jsp</result>
        </action>
   </package>
  <!-- <constant name="struts.enable.DynamicMethodInvocarion" value="true"></constant>-->
</struts>

配置hibernate.cfg.xml:

<?xml version='1.0' encoding='UTF-8'?>
 <!DOCTYPE hibernate-configuration PUBLIC
           "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>
		<property name="hibernate.connection.driver_class"> com.mysql.jdbc.Driver </property>
		<property name="connection.url"> jdbc:mysql://localhost:3306/test?characterEncoding=utf-8</property>
	<!--	<property name="connection.useUnicode">true</property>-->
        <property name="connection.characterEncoding">UTF-8</property>
		<property name="hibernate.connection.username">root</property>
		<property name="connection.password">123456</property>
		<property name="connection.pool_size">1</property>
		<!--<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>-->
		<property name="show_sql">true</property>
		<mapping class="com.zz.entity.News" />
	</session-factory>
</hibernate-configuration>

实体类News:

package com.zz.entity;
import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;
import javax.persistence.Table;


//An entity representing Game Record
@Entity
@Table(name = "News")
public class News {
	private int id;
	private String category;
	private String title;
	private String content;
	
	@Id
	@GeneratedValue
	@Column(name = "id")
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	
	@Column(name = "title")
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	
	@Column(name = "content")
	public String getContent() {
		return content;
	}
	public void setContent(String content) {
		this.content = content;
	}
	
	@Column(name = "category")
	public String getCategory() {
		return category;
	}
	public void setCategory(String category) {
		// TODO Auto-generated method stub
		this.category = category;
	}
	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("News [id=").append(id).append(", title=").append(title).append(", content=").append(content).append(", category=").append(category)
				.append("]");
		return builder.toString();
	}
	
	
}

LoginAction：

package com.zz.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{
	private static final long serialVersionUID = 1L;
    private String name;
    private String password;
     public String execute()  
        {  
            if("zzdoreen".equals(this.name) && "zz8986123".equals(this.password))  
                return "success";  
            else  
                return "error";  
        }  
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }    

}

NewsAction:

package com.zz.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{
	private static final long serialVersionUID = 1L;
    private String name;
    private String password;
     public String execute()  
        {  
            if("zzdoreen".equals(this.name) && "zz8986123".equals(this.password))  
                return "success";  
            else  
                return "error";  
        }  
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }    

}

dao层：

创建类NewsDAO：


package com.zz.dao;

import java.util.List;

import com.zz.entity.News;


//DataAccess layer for game table in the database;
public interface NewsDAO {
	public void insertNews(News news);
	public void updateNews(News news);
	public void deleteNews(int id);
	public News findById(int id);
	public List<News> listAll();
	public boolean isIdPresent(int id);
}

创建接口NewsDAOImpl：

package com.zz.dao;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.googlecode.s2hibernate.struts2.plugin.annotations.SessionTarget;
import com.googlecode.s2hibernate.struts2.plugin.annotations.TransactionTarget;
import com.zz.entity.News;


//Implementation of dataAccessLayer
public class NewsDAOImpl implements NewsDAO {

	//These objects are injected using the Full Hibernate Plug-in 1.4 GA. 
	
	@SessionTarget
	Session session; 
	
	@TransactionTarget
	Transaction transaction;
	
	@Override
	public void insertNews(News news) {
		try {
			session.save(news);
		} catch (Exception e) {
			transaction.rollback();
			e.printStackTrace();
		}
	}
	
	@Override
	public void updateNews(News news) {
		try {
			session.clear();
			session.update(news);
		} catch (Exception e) {
			transaction.rollback();
			e.printStackTrace();
			session.close();
		}
	}
	
	@Override
	public void deleteNews(int id) {
		try {
			News news = (News) session.get(News.class, id);
			session.delete(news);
		} catch (Exception e) {
			transaction.rollback();
			e.printStackTrace();
		}
	}

	@Override
	public News findById(int id) {
		session.clear();
		return (News) session.get(News.class, id);
	}
	
	
	@SuppressWarnings("unchecked")
	@Override
	public List<News> listAll() {
		return session.createQuery("from News").list(); //The table name is Entity class name representing database table

	}
	
	public boolean isIdPresent(int id) {
		News news = (News) session.get(News.class, id);
		if(news==null) {
			return false;
		}else{
			return true;
		}
	}
	
}

我还有两个过滤器一个是解决编码问题的，一个是解决struts2和富文本编辑器冲突的

package 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.HttpServletRequestWrapper;
 
public class SetCharacterEncodingFilter implements Filter{
	class Request extends HttpServletRequestWrapper
    {
        public Request(HttpServletRequest request) {
            super(request);
        }
        public String toUTF8(String input) {
            try {
                byte[] bytes = input.getBytes("ISO8859-1");
                return new String(bytes, "utf-8");
            } catch (Exception ex) {
            }
            return null;
        }
        private HttpServletRequest getHttpServletRequest()
        {
            return (HttpServletRequest) super.getRequest();
        }
        public String getParameter(String name)
        {
            return
                    toUTF8(getHttpServletRequest().getParameter(name));
        }
        public String[] getParameterValues(String name)
        {
            String values[] =getHttpServletRequest().getParameterValues(name);
            if (values != null) {
                for (int i = 0; i < values.length; i++) {
                    values[i] = toUTF8(values[i]);
                }
            }
            return values;
        }
    }
    public void destroy() {
    }
    public void doFilter(ServletRequest request, ServletResponse
    		response,FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpreq = (HttpServletRequest) request;
        if (httpreq.getMethod().equals("POST")) {
            request.setCharacterEncoding("utf-8");
        } else {
            request = new Request(httpreq);
        }
        chain.doFilter(request, response);
    }
    public void init(FilterConfig filterConfig) throws
    ServletException {
    }  
}

package filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter;

public class UeditorFilter extends StrutsPrepareAndExecuteFilter{       
	public void doFilter(ServletRequest req, ServletResponse res,              
			FilterChain chain) throws IOException, ServletException{          
		HttpServletRequest request =(HttpServletRequest) req;          
		String url =request.getRequestURI();               
		if (url.contains("/ueditor/jsp/controller.jsp")) {                                                                  
			chain.doFilter(req, res);                   
			}else{                              
				super.doFilter(req, res, chain);                   
				}     
		}        
	}

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