SSH实现简单增删改查的功能实例
// 4/21/2021更新
-
更新jdk版
-
解决无法找到sun.misc.BASE64Encoder的jar包的解决方法
原因是因为jdk版本更新后，就不在支持。
这篇文章写的非常清楚，大家可以看看。链接
删除原本的包，导入新的包
import org.apache.commons.codec.binary.Base64;
导入这个包需要另外添加一个包，[下载链接] (https://blog.csdn.net/qq_40378795/article/details/109482864)
jar下载 -
我更新一下，重新上传，下载链接
-
代码中有个cookie问题，需要修改。
问题链接
Cookie cookie = new Cookie(USER_COOKIE, user.getFirstName() + "+" + user.getLastName());
- 有问题，可以沟通，欢迎交流。
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在网上看到一篇写的很不错的关于SSH 整合实现简单的增删改查功能的实例。
因为也是初次使用SSH框架，通过这样的实例更好的理解SSH框架。对原本的代码进行了修改和优化。如有不足之处，还请指教。
原文链接：http://blog.csdn.net/zhubinqiang/article/details/8498808
与原实例更新之处和优化的地方。
**新增1.**实现hibernate自动创建数据表。
部分重要代码
create
**新增2.**优化查找功能
查找功能在原先的代码中有的。但是返回的是user对象。我对它进行优化后，直接返回list，和查找全部对象的方法一样，当action返回SUCCESS时，
@Override
public List 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 list =query.list();
return list;
}
**优化3.**原先在运行过程中会报错。
报错提示：
严重: Could not create and/or set value back on to object
java.lang.IllegalArgumentException
at org.springframework.asm.ClassReader.(Unknown Source)
at org.springframework.asm.ClassReader.(Unknown Source)
at org.springframework.asm.ClassReader.(Unknown Source)
这个原因是：
在表单提交的时候，action并没有创建表单对应的实例（只在action中声明：private User user）。
因为在写表单对应的类时，写了一个带有参数的构造方法，而在action中只是定义了这个类，没有实现 。
解决办法：
在action中，new出表单对应的类
private User user= new User();
优化4
hibernate3换成hibernate4
hibernate4中getHibernateTemplate（）没有这个方法了。
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session getSession() {
return sessionFactory.getCurrentSession();
}
直接用getSession（）和getHibernateTemplate（）一样的效果。
解决了和spring3.0和hibernate4的结合。
主要优化就这些。
完整代码
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 {
// 调用service相关的方法，完成实际的业务处理
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;
}
}
dao
package com.sqt.dao;
import java.util.List;
import com.sqt.bean.User;
public interface UserDAO {
public void doCreateUser(User user);
public List findAllUsers();
public void removeUser(User user);
public void updateUser(User user);
public List 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 findAllUsers() {
// TODO Auto-generated method stub
String hql = "from User u order by u.id asc";
Query query=getSession().createQuery(hql);
List 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 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 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 findAllUsers();
public void delete(User user);
public void update(User user);
public List 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 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 findUserById(int id) {
System.out.println("-------UserService.findUserById-----------"+id);
return this.dao.findUserById(id);
}
}
spring和hibernate的配置文件
applicationContext.xml
org.gjt.mm.mysql.Driver
jdbc:mysql://127.0.0.1:3306/db_hibernate
root
123456
com/sqt/bean/User.hbm.xml
org.hibernate.dialect.MySQLDialect
true
create
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED
struts.xml 配置文件
listUser.action
/list.jsp
listUser.action
/update.jsp
listUser.action
/list.jsp
web.xml
index.jsp
struts2
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
struts2
/*
org.springframework.web.context.ContextLoaderListener
jsp页面
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
My JSP 'index.jsp' starting page
Operation List
Save User
List Users
list.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
My JSP 'list.jsp' starting page
Users List
返回
序号
姓
名
年龄
删除
更新
Delete
Update
save.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
My JSP 'index.jsp' starting page
Save User
update.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
My JSP 'update.jsp' starting page
Update User
除了这个案例，另外再提供一个完成的案例。
下载地址：
http://download.csdn.net/detail/shaoqianting/9875818
实现列表、增加、删除、修改和登录等功能。
采用环境:Apache Tomcat v7.0，java SE8[1.8.0_20]
数据库db_ssh,数据表tb_Users
