貼吧專案（struts+hibernate）--邏輯程式碼
阿新 • • 發佈：2019-02-01
分析：
Reply.hbm.xml:
Topic.hbm.xml:
HibernateUtils:
EncodingFilter:
TopicDao:
TopicDaoImpl:
TopicAction:
hibernate.cfg.xml:
struts.xml:
程式碼：
Reply.java:
public class Reply {
private Integer rid;
private String replyContent; //回覆的內容
private String ipAddr; //作者（回覆人）
private Date createDate; //回帖時間
//多對一：多個回覆 屬於 【一個主題】
private Topic topic;
Reply.hbm.xml:
Topic.java:<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.itheima.domain"> <class name="Reply" table="t_Reply"> <id name="rid" column="rid" > <generator class="native"></generator> </id> <property name="replyContent" type="string" ></property> <property name="ipAddr" type="string" ></property> <property name="createDate" > <column name="createDate" sql-type="datetime" ></column> </property> <many-to-one name="topic" class="Topic" column="tid" ></many-to-one> </class> </hibernate-mapping>
//帖子 public class Topic { private Integer tid; private String title; //標題 private String topicContent; //內容 private String ipAddr; //ip地址（作者） private Date lastReplyDate; //最後回覆時間 private Date createDate; //發帖時間（建立時間） //一對多： 一個主題 可以擁有 【多個回覆】 private Set<Reply> replySet = new HashSet<Reply>();
Topic.hbm.xml:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.itheima.domain"> <class name="Topic" table="t_Topic"> <id name="tid" column="tid" > <generator class="native"></generator> </id> <property name="title" type="string" ></property> <property name="topicContent" type="string" ></property> <property name="ipAddr" type="string" ></property> <property name="lastReplyDate" > <column name="lastReplyDate" sql-type="datetime" ></column> </property> <property name="createDate" > <column name="createDate" sql-type="datetime" ></column> </property> <set name="replySet"> <key column="tid"></key> <one-to-many class="Reply" /> </set> </class> </hibernate-mapping>
HibernateUtils:
package com.itheima.utils;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;
public class HibernateUtils {
private static SessionFactory sf;
static{
//1載入配置
Configuration conf = new Configuration().configure();
//2 根據Configuration 配置資訊建立 SessionFactory
sf = conf.buildSessionFactory();
}
public static org.hibernate.Session openSession(){
//3 獲得session
Session session = sf.openSession();
return session;
}
public static org.hibernate.Session getCurrentSession(){
//3 獲得session
Session session = sf.getCurrentSession();
return session;
}
public static void main(String[] args) {
getCurrentSession();
}
}
EncodingFilter:
package com.itheima.web.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;
/**
* Servlet Filter implementation class EncodingFilter
*/
public class EncodingFilter implements Filter {
/**
* Default constructor.
*/
public EncodingFilter() {
// TODO Auto-generated constructor stub
}
/**
* @see Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
response.setContentType("text/html;charset=utf-8");
//1 建立我們包裝之後的request物件
ServletRequest req = new MyRequest((HttpServletRequest)request);
//2放行(放行的request是我們包裝後的)
chain.doFilter(req, response);
}
/**
* @see Filter#init(FilterConfig)
*/
public void init(FilterConfig fConfig) throws ServletException {
// TODO Auto-generated method stub
}
}
MyRequest:
package com.itheima.web.filter;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletRequestWrapper;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
//將已經是亂碼的引數,重新編碼回中文
public class MyRequest extends HttpServletRequestWrapper{
private Map<String,String[]> params =new HashMap<String, String[]>();
public MyRequest(HttpServletRequest request) {
super(request);
// 在構造中獲得封裝引數的map, 將map中所有亂碼解決
//-----------------------------------------------
//1 獲得map
Map<String,String[]> map = super.getParameterMap();
//2 遍歷map
if(map!=null && map.size()>0){
for(Entry<String, String[]> en : map.entrySet()){
//3 取出每個鍵值對,並解決值得亂碼(逆推法)
String[] values = en.getValue();
if(values!=null){
String[] newValues = new String[values.length];
for(int i = 0; i < values.length ;i++){
try {
newValues[i] = new String(values[i].getBytes("ISO-8859-1"),"UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
//4 將解決的鍵值對 放入新的map
params.put(en.getKey(), newValues);
}
}
}
}
@Override
public String getParameter(String name) {
String[] values = params.get(name);
if(values==null){//獲得的引數鍵不存在
return null;
}
return values[0];
}
@Override
public Map<String,String[]> getParameterMap() {
return params;
}
@Override
public String[] getParameterValues(String name) {
return params.get(name);
}
}
TransactionFilter:
package com.itheima.web.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 org.hibernate.Hibernate;
import org.hibernate.Session;
import com.itheima.utils.HibernateUtils;
public class TransactionFilter implements Filter {
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
Session session = HibernateUtils.getCurrentSession();
session.beginTransaction();
try {
chain.doFilter(request, response);
if(session!=null && session.isOpen()){
session.getTransaction().commit();
}
} catch (Exception e) {
e.printStackTrace();
if(session!=null && session.isOpen()){
session.getTransaction().rollback();
}
}
}
public void init(FilterConfig fConfig) throws ServletException {
}
}
TopicDao:
package com.itheima.dao;
import java.util.List;
import com.itheima.domain.Topic;
public interface TopicDao {
//儲存帖子
void save(Topic t);
//根據條件查詢帖子列表
List<Topic> getAll(String key);
}
TopicDaoImpl:
package com.itheima.dao;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import com.itheima.domain.Topic;
import com.itheima.utils.HibernateUtils;
public class TopicDaoImpl implements TopicDao {
public void save(Topic t) {
Session session = HibernateUtils.getCurrentSession();
session.save(t);
}
public List<Topic> getAll(String key) {
//1 獲得session
Session session = HibernateUtils.getCurrentSession();
//2 建立query物件
Query query = session.createQuery("from Topic where title like :key ");
//3 設定引數
if(key!=null && !"".equals(key.trim())){//頁面傳條件了
query.setString("key", "%"+key+"%");
}else{//頁面沒傳條件=>查詢所有
query.setString("key", "%");
}
//4 查詢 list
return query.list();
}
}
TopicAction:
package com.itheima.web.action;
import java.util.Date;
import java.util.List;
import org.apache.struts2.ServletActionContext;
import com.itheima.dao.TopicDao;
import com.itheima.dao.TopicDaoImpl;
import com.itheima.domain.Topic;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class TopicAction extends ActionSupport {
private TopicDao ud = new TopicDaoImpl();
private Topic topic;
private String key;
//帖子列表
public String list(){
//1呼叫dao獲得帖子列表
List<Topic> list = ud.getAll(key);
//2 將帖子列表放入ActionContext中
ActionContext.getContext().put("list", list);
return "list";
}
//------------------------------------------------------
//發帖
public String add(){
//1 ip
topic.setIpAddr(ServletActionContext.getRequest().getRemoteAddr());
//2 建立/回帖時間
topic.setCreateDate(new Date());
topic.setLastReplyDate(topic.getCreateDate());
//3儲存
ud .save(topic);
return "toList";
}
//---------------------------------------------------------------
public Topic getTopic() {
return topic;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public void setTopic(Topic topic) {
this.topic = topic;
}
}
hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/ee19_tieba
</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">1234</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="current_session_context_class">thread</property>
<property name="hbm2ddl.auto">update</property>
<mapping resource="com/itheima/domain/Reply.hbm.xml" />
<mapping resource="com/itheima/domain/Topic.hbm.xml" />
</session-factory>
</hibernate-configuration>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>
<package name="tieba" namespace="/" extends="struts-default" >
<action name="TopicAction_*" method="{1}" class="com.itheima.web.action.TopicAction" >
<result name="toList" type="redirectAction">
<param name="actionName">TopicAction_list</param>
<param name="namespace">/</param>
</result>
<result name="list" >/index.jsp</result>
</action>
</package>
</struts>web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name></display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter>
<filter-name>TransactionFilter</filter-name>
<filter-class>com.itheima.web.filter.TransactionFilter</filter-class>
</filter>
<filter>
<filter-name>EncodeFilter</filter-name>
<filter-class>com.itheima.web.filter.EncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>EncodeFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>TransactionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>