SSM整合
1. 登录案例
1.1 创建实体类
@Repository
public class User {
private Integer uid;
private String userName;
private String password;
private String realName;
public Integer getUid() {
return uid;
}
public void setUid(Integer uid) {
this.uid = uid;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getRealName() {
return realName;
}
public void setRealName(String realName) {
this.realName = realName;
}
}
1.2 编写Dao层接口
public interface UserDao {
//登录
public User Login(@Param("userName") String userName, @Param("password") String password);
}
1.3 编写小配置文件
<mapper namespace="com.invoicing.dao.UserDao">
<select id="Login" resultType="com.invoicing.entity.User">
select * from users where userName=#{userName} and password=#{password}
</select>
</mapper>
1.4 编写application-mybatis.xml文件
<!--加载属性文件-->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" >
<array>
<value>classpath*:*.properties</value>
</array>
</property>
</bean>
<!--DataSource-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!--SessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- <property name="mapperLocations" value="classpath*:com/invoicing/dao/*.xml"></property>-->
<property name="configLocation" value="classpath:config.xml"></property>
</bean>
<!--包扫描-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.invoicing.dao"></property>
</bean>
<!--事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--开启事务注解配置-->
<tx:annotation-driven/>
<context:annotation-config/>
<context:component-scan base-package="com.invoicing"></context:component-scan>
1.5 编写Config.xml文件
<settings>
<setting name="logImpl" value="LOG4J"/>
</settings>
<!-- 引入 pageHelper插件 -->
<!--注意这里要写成PageInterceptor, 5.0之前的版本都是写PageHelper, 5.0之后要换成PageInterceptor-->
<plugins>
<plugin interceptor="com.github.pagehelper.PageHelper"></plugin>
</plugins>
<mappers>
<package name="com.invoicing.dao"/>
</mappers>
1.6 编写jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/invoicingsystem?useUniCode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123
1.7编写Spring-mvc.xml文件
<!--推荐使用注解方式-->
<!--配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/"></property>
<!--return "index"======>/jsp/index.jsp-->
<property name="suffix" value=".jsp"></property>
</bean>
<!--开启MVC的注解配置-->
<mvc:annotation-driven/>
<!--包扫描器：扫描 MVC中的注解-->
<context:component-scan base-package="com.invoicing"/>
<mvc:default-servlet-handler/>
1.7 编写web.xml文件
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--读取spring-mvc.xml文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--spring和MyBatis整合的核心配置-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:application-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
1.8 编写Service层接口
public interface UserService {
//登录
public User Login(@Param("userName") String userName, @Param("password") String password);
}
1.9 编写Service层接口实现类
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
UserDao userDao;
@Override
public User Login(String userName, String password) {
return userDao.Login(userName,password);
}
}
1.10 编写Contrller层
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
UserService userService;
@RequestMapping("/login")
@ResponseBody
public ModelAndView login(String userName, String password, HttpServletResponse respones,HttpServletRequest request, ModelAndView mv){
System.out.println(userName+"\t"+password);
User login = userService.Login(userName, password);
if (login!=null){
System.out.println("登陆成功");
request.getSession().setAttribute("login",login);
mv.setViewName("index");
}else {
mv.setViewName("login");
}
return mv;
}
}
1.11 编写过滤器实现非法拦截
@WebFilter(urlPatterns = {"/*"})
public class LoginFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("======过滤器====");
HttpServletRequest request=(HttpServletRequest) servletRequest;
if(request.getRequestURI().equals("/user/login")){
filterChain.doFilter(servletRequest,servletResponse);
}
Object login = request.getSession().getAttribute("login");
if (login==null){
request.getRequestDispatcher("/jsp/login.jsp").forward(servletRequest,servletResponse);
}else{
filterChain.doFilter(servletRequest,servletResponse);
}
}
@Override
public void destroy() {
}
}
