Spring的初始化

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1:认识Spring

创始人：Rod Johson

特点：

a:方便解耦合，简化开发，提升性能(IOC)

b:Aop面向切面的编程

c:声明式事务的调试

d:方便程序的测试

e:方便集成各大优秀的框架

f:Java源代码学习的典范

2: Spring的体系结构

3:Java的面向对象，封装、继承、多态。

Java的本质是什么：面向对象

对象是怎么创建的：new

对象职责是：调用方法和给属性赋值

JavaBean的作用

a:为什么要生成getter/setter呢？(就是为了给属性赋值)

3、快速搭建一个SpringWeb框架，实现登录

案例：Springmvc +Hibernate实现helloword

1、下载spring所需要的包

2、项目结构搭建

3、结构分析和详细代码

（1）、applicationContext.xml

<context:component-scan base-package="com.Heart.dao"></context:component-scan>
<context:component-scan base-package="com.Heart.service"></context:component-scan>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

（2）、web.xml

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>


<filter>
<filter-name>encoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


<servlet>
<servlet-name>tzspringmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>namespace</param-name>
<param-value>tzspringmvc</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>tzspringmvc</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

（3）、tzspringmvc.xml

<context:component-scan base-package="com.Heart.web"></context:component-scan>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>

（4）、user.java

public class User implements java.io.Serializable{
private Integer id;
private String username;
private String password;
private String email;
private Integer age;
private Date createTime;
private String address;

同时生成他们的set get 构造方法

（5）、UserDao.java

@Repository
public class UserDao {

@Autowired
private JdbcTemplate jdbcTemplate;

public boolean saveUser(User user){

/**
* 保存用户信息
*/
String sql = "INSERT into tz_user(username,password,age,address,email)VALUES(?,?,?,?,?)";
//保存、修改、删除都是update
int count = jdbcTemplate.update(sql,user.getUsername(),user.getPassword(),user.getAge(),user.getAddress(),user.getEmail());
return count >0 ?true:false;
}

/**
* 查询用户信息
*/
@SuppressWarnings("unchecked")
public List<User> findUser(){
String sql = "select id,username,address,'password',email,create_time from tz_user";
final List<User> users = new ArrayList<User>();
jdbcTemplate.query(sql, new RowMapper(){
@Override
public Object mapRow(ResultSet rs,int index) throws SQLException{
User user = new User();
user.setId(rs.getInt("id"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setEmail(rs.getString("email"));
user.setCreatTime(new Date(rs.getTimestamp("create_time").getTime()));
users.add(user);
return user;
}

});
return users;
}
}

（6）、UserService.java

@Service
public class UserService {

@Autowired
private UserDao userDao;

/**
* 保存用户信息
*/

public boolean saveUser(User user){
return userDao.saveUser(user);
}

/**
* 查询用户信息
*
*/
public List<User> findUser(){
return userDao.findUser();
}
}

（7）、UserController.java

@Controller
public class UserController {

@Autowired
private UserService userService;

@RequestMapping("/user")
public ModelAndView user(){
ModelAndView modelAndView = new ModelAndView();
List<User> users = userService.findUser();
modelAndView.addObject("users",users);
modelAndView.setViewName("user");
return modelAndView;
}

@RequestMapping("/user/save")
public ModelAndView usersave(HttpServletRequest request){
ModelAndView modelAndView = new ModelAndView();
User user = new User();
user.setAge(Integer.parseInt(request.getParameter("age")));
user.setUsername(request.getParameter("username"));
user.setPassword(request.getParameter("password"));
user.setAddress(request.getParameter("address"));
user.setEmail(request.getParameter("email"));
boolean flag = userService.saveUser(user);
if(flag){
modelAndView.setViewName("success");
System.out.println("保存成功");
}else{
modelAndView.setViewName("fail");
System.out.println("保存失败");
}
return modelAndView;
}
}

创建 user.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE HTML >
<html>
<head>


<title>My JSP 'user.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>
<c:forEach var="user" items="${users}">
<h1>${user.id}====${user.username}===${user.email}</h1>
</c:forEach>

<form action="user/save.html" method="post">
<p>用户名：<input type="text" name="username"></p>
<p>密码：<input type="text" name="password"></p>
<p>年龄：<input type="text" name="age"></p>
<p>邮箱：<input type="text" name="email"></p>
<p>地址：<input type="text" name="address"></p>
<input type="submit" value="注册">
</form>
</body>
</html>

运行程序：http://localhost:8080/Heart_Springmvc/user.html

返回成功

查看数据库是否添加成功

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