SSH實現簡單增刪改查的功能例項
阿新 • • 發佈：2019-02-13
在網上看到一篇寫的很不錯的關於SSH 整合實現簡單的增刪改查功能的例項。
因為也是初次使用SSH框架，通過這樣的例項更好的理解SSH框架。對原本的程式碼進行了修改和優化。如有不足之處，還請指教。
原文連結：http://blog.csdn.net/zhubinqiang/article/details/8498808
與原例項更新之處和優化的地方。
新增1.實現hibernate自動建立資料表。
部分重要程式碼
<prop key="hibernate.hbm2ddl.auto">
create
</prop> <class name="com.sqt.bean.User" 新增2.優化查詢功能
查詢功能在原先的程式碼中有的。但是返回的是user物件。我對它進行優化後，直接返回list，和查詢全部物件的方法一樣，當action返回SUCCESS時，<result name="success">/list.jsp</result>
@Override
public List<User> 優化3.原先在執行過程中會報錯。
報錯提示：
嚴重: Could not create and/or set value back on to object
java.lang.IllegalArgumentException
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)這個原因是：
在表單提交的時候，action並沒有建立表單對應的例項（只在action中宣告：private User user）。
因為在寫表單對應的類時，寫了一個帶有引數的構造方法，而在action中只是定義了這個類，沒有實現 。
解決辦法：
在action中，new出表單對應的類
private User user= new User();優化4
hibernate3換成hibernate4
hibernate4中getHibernateTemplate（）沒有這個方法了。
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session getSession() {
return sessionFactory.getCurrentSession();
}直接用getSession（）和getHibernateTemplate（）一樣的效果。
解決了和spring3.0和hibernate4的結合。
主要優化就這些。
完整程式碼
aciton
package com.sqt.action.user;
import com.opensymphony.xwork2.ActionSupport;
import com.sqt.bean.User;
import com.sqt.service.UserService;
public class DeleteUserAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private User user=new User();
private UserService userService;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@Override
public String execute() throws Exception {
System.out.println("-------UserAction.deleteUser-----------"+user.getFirstName());
this.userService.delete(user);
return SUCCESS;
}
}package com.sqt.action.user;
import java.util.Map;
import com.sqt.service.UserService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class ListUserAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private UserService userService;
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@SuppressWarnings("unchecked")
@Override
public String execute() throws Exception {
System.out.println("-------UserAction.ListUser-----------");
Map request = (Map) ActionContext.getContext().get("request");
request.put("list", this.userService.findAllUsers());
return SUCCESS;
}
}
package com.sqt.action.user;
import com.sqt.bean.User;
import com.sqt.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
public class SaveUserAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private User user;
private UserService userService;
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
@Override
public String execute() throws Exception {
// 呼叫service相關的方法，完成實際的業務處理
System.out.println("-------UserAction.SaveUser-----------"+user.getFirstName());
this.userService.doCreateUser(user);
return SUCCESS ;
}
}package com.sqt.action.user;
import com.sqt.bean.User;
import com.sqt.service.UserService;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UpdatePUser extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private User user=new User();
private UserService userService;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@Override
public String execute() throws Exception {
System.out.println("-------UserAction.UpdatePUser-----------"+user.getId());
Map request = (Map) ActionContext.getContext().get("request");
request.put("list", this.userService.findUserById(user.getId()));
return SUCCESS;
}
}package com.sqt.action.user;
import com.opensymphony.xwork2.ActionSupport;
import com.sqt.bean.User;
import com.sqt.service.UserService;
public class UpdateUserAction extends ActionSupport {
private User user=new User();
private UserService userService;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@Override
public String execute() throws Exception {
System.out.println("-------UserAction.UpdateUser-----------"+user.getFirstName());
this.userService.update(this.user);
return SUCCESS;
}
}bean
package com.sqt.bean;
public class User {
private int id;
private String firstName;
private String lastName;
private int age;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "ID: " + id + "FirstName: " + firstName;
}
} <?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>
<class name="com.sqt.bean.User" table="tb_Users" schema="db_hibernate">
<id name="id" type="int" column="ID">
<generator class="increment"></generator>
</id>
<property name="firstName" column="firstName" type="string"></property>
<property name="lastName" column="lastName" type="string"></property>
<property name="age" column="age" type="int"></property>
</class>
</hibernate-mapping>dao
package com.sqt.dao;
import java.util.List;
import com.sqt.bean.User;
public interface UserDAO {
public void doCreateUser(User user);
public List<User> findAllUsers();
public void removeUser(User user);
public void updateUser(User user);
public List<User> findUserById(int id);
} package com.sqt.dao.impl;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import com.sqt.bean.User;
import com.sqt.dao.UserDAO;
public class UserDAOImpl implements UserDAO {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session getSession() {
return sessionFactory.getCurrentSession();
}
@Override
public void doCreateUser(User user) {
// TODO Auto-generated method stub
System.out.println("-------UserDaoImp.doCreateUser-----------"+user.getFirstName());
System.out.println("id"+user.getId());
System.out.println("firstname"+user.getFirstName());
System.out.println("lastname"+user.getLastName());
System.out.println("age"+user.getAge());
getSession().save(user);
}
@Override
public List<User> findAllUsers() {
// TODO Auto-generated method stub
String hql = "from User u order by u.id asc";
Query query=getSession().createQuery(hql);
List<User> list =query.list();
return list;
}
@Override
public void removeUser(User user) {
// TODO Auto-generated method stub
System.out.println("-------UserDaoImp.removeUser-----------"+user.getFirstName());
getSession().delete(user);
}
@Override
public void updateUser(User user) {
// TODO Auto-generated method stub
System.out.println("-------UserDaoImp.updateUser-----------"+user.getFirstName());
getSession().update(user);
}
@Override
public List<User> findUserById(int id) {
// TODO Auto-generated method stub
System.out.println("-------UserDaoImp.findUserById-----------"+id);
String hql = "from User u where u.id=:id order by u.id asc";
Query query=getSession().createQuery(hql);
query.setInteger("id", id);
List<User> list =query.list();
return list;
}
}service
package com.sqt.service;
import java.util.List;
import com.sqt.bean.User;
public interface UserService {
public void doCreateUser(User user);
public List<User> findAllUsers();
public void delete(User user);
public void update(User user);
public List<User> findUserById(int id);
}package com.sqt.service.impl;
import java.util.List;
import com.sqt.bean.User;
import com.sqt.dao.UserDAO;
import com.sqt.service.UserService;
public class UserServiceImpl implements UserService {
private UserDAO dao;
public UserDAO getDao() {
return dao;
}
public void setDao(UserDAO dao) {
this.dao = dao;
}
public void doCreateUser(User user) {
System.out.println("-------UserService.doCreateUser-----------"+user.getFirstName());
this.dao.doCreateUser(user);
}
public List<User> findAllUsers() {
System.out.println("-------UserService.findAllUsers-----------");
return this.dao.findAllUsers();
}
public void delete(User user) {
System.out.println("-------UserService.deleteUser-----------"+user.getFirstName());
this.dao.removeUser(user);
}
public void update(User user) {
System.out.println("-------UserService.updateUser-----------"+user.getFirstName());
this.dao.updateUser(user);
}
public List<User> findUserById(int id) {
System.out.println("-------UserService.findUserById-----------"+id);
return this.dao.findUserById(id);
}
}spring和hibernate的配置檔案
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<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/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- 啟用spring註解支援 -->
<context:annotation-config />
<!-- 想到與Hibernate的hibernate.cfg.xml -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>org.gjt.mm.mysql.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://127.0.0.1:3306/db_hibernate</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>123456</value>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource"/>
</property>
<property name="mappingResources">
<list>
<value>com/sqt/bean/User.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">
true
</prop>
<prop key="hibernate.hbm2ddl.auto">
create
</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>
<bean id="userDAO" class="com.sqt.dao.impl.UserDAOImpl" scope="singleton">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>
<bean id="userServiceTarget" class="com.sqt.service.impl.UserServiceImpl" scope="singleton">
<property name="dao" ref="userDAO" />
</bean>
<bean id="userService" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="target">
<ref local="userServiceTarget"/>
</property>
<property name="transactionManager">
<ref local="transactionManager"/>
</property>
<property name="transactionAttributes">
<props>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>
<bean id="saveUserAction" class="com.sqt.action.user.SaveUserAction" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>
<bean id="listUserAction" class="com.sqt.action.user.ListUserAction" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>
<bean id="removeUserAction" class="com.sqt.action.user.DeleteUserAction" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>
<bean id="updatePUserAction" class="com.sqt.action.user.UpdatePUser">
<property name="userService" ref="userService"></property>
</bean>
<bean id="updateUserAction" class="com.sqt.action.user.UpdateUserAction" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>
<bean id="UpdatePUser" class="com.sqt.action.user.UpdatePUser" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>
</beans>struts.xml 配置檔案
<?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="ssh2" extends="struts-default">
<action name="saveUser" class="saveUserAction">
<result name="success" type="redirect">listUser.action</result>
</action>
<action name="listUser" class="listUserAction">
<result name="success">/list.jsp</result>
</action>
<action name="deleteUser" class="removeUserAction">
<result name="success" type="redirect">listUser.action</result>
</action>
<action name="updatePUser" class="updatePUserAction">
<result name="success">/update.jsp</result>
</action>
<action name="updateUser" class="updateUserAction">
<result name="success" type="redirect">listUser.action</result>
</action>
<action name="findUser" class="UpdatePUser">
<result name="success">/list.jsp</result>
</action>
</package>
</struts>web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>jsp頁面
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<h1><font color="red">Operation List</font></h1>
<s:a href="save.jsp">Save User</s:a><br/>
<s:a href="listUser.action">List Users</s:a>
<s:form action="findUser">
<s:textfield name="user.id" label="id"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>list.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'list.jsp' starting page</title>
<script type="text/javascript">
function del(){
if(confirm("Are you sure?")){
return true;
}
return false;
}
</script>
</head>
<body>
<h1><font color="red">Users List</font></h1>
<s:a href="/ssh2/index.jsp">返回</s:a>
<table border="1" width="80%" align="center">
<tr>
<th>序號</th>
<th>姓</th>
<th>名</th>
<th>年齡</th>
<th>刪除</th>
<th>更新</th>
</tr>
<s:iterator value="#request.list" id="us">
<tr>
<td>
<s:property value="#us.id"/>
</td>
<td>
<s:property value="#us.firstName"/>
</td>
<td>
<s:property value="#us.lastName"/>
</td>
<td>
<s:property value="#us.age"/>
</td>
<td align="center">
<s:a href="deleteUser.action?user.id=%{#us.id}"