SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)

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SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化),SpringMVC【SpringMVC拦截器_拦截器过滤敏感词案例、SpringMVC跨域请求_同源策略SpringMVC跨域请求_跨域请求、SpringMVC跨域请求_控制器接收跨域请求、SSM


SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_原力计划

 

目录

 SpringMVC拦截器_拦截器过滤敏感词案例 

          SpringMVC跨域请求_同源策略 

         SpringMVC跨域请求_跨域请求 

SpringMVC跨域请求_控制器接收跨域请求

SSM整合_需求分析

         SSM整合_创建父工程

         SSM整合_创建dao子工程

SSM整合_创建service子工程 

SSM整合_创建controller子工程 

SSM整合_运行项目 


 

 SpringMVC拦截器_拦截器过滤敏感词案例 

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_跨域请求_02

 接下来我们编写一个拦截器案例,需求如下: 在系统中,我们需要将所有响应中的一些敏感词替换为 *** ,此时可以使用拦截器达到要求:

1、编写控制器方法
@RequestMapping("/m2")public String m2(Model model){
    model.addAttribute("name","大笨蛋");
    return "result";
}
2、编写敏感词拦截器
// 敏感词拦截器 public class SensitiveWordInterceptor implements HandlerInterceptor {    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {        return true;   }    @Override
// 敏感词拦截器public class SensitiveWordInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
        return true;
   }
    @Override 
public void postHandle(HttpServletRequest request,HttpServletResponse response, Object
handler, ModelAndView modelAndView) {
        // 敏感词列表
        String[] sensitiveWords = {"坏人","暴力","笨蛋"};
        // 获取model中所有数据
        Map<String, Object> model = modelAndView.getModel();
        Set<Map.Entry<String, Object>> entries = model.entrySet();
        // 遍历model
        for (Map.Entry<String, Object> entry : entries) {
            String key = entry.getKey();
            String value = entry.getValue().toString();
            // 将model值和敏感词列表遍历比对
            for (String sensitiveWord : sensitiveWords) {
                // 如果model值包含敏感词,则替换
               if(value.contains(sensitiveWord)){
                    String newStr = value.replaceAll(sensitiveWord, "***");
                    model.put(key,newStr);
               }
           }
       }
   }
}
3、配置拦截器
<!-- 配置拦截器--><mvc:interceptors>
    <!-- 敏感词拦截器 -->
    <mvc:interceptor>
        <mvc:mapping path="/**"/>
        <bean class="com.tong.interceptor.SensitiveWordInterceptor"></bean>
    </mvc:interceptor>
</mvc:interceptors>

SpringMVC跨域请求_同源策略 

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_SpringMVC_03

 同源策略是浏览器的一个安全功能。同源,指的是两个URL的协 议,域名,端口相同。浏览器出于安全方面的考虑,不同源的客户 端脚本在没有明确授权的情况下,不能读写对方资源。

哪些不受同源策略限制:

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_java_04

 最容易收到同源策略影响的就是Ajax请求。

SpringMVC跨域请求_跨域请求 

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_跨域请求_05

 当请求URL的协议、域名、端口三者中任意一个与当前页面URL不 同时即为跨域。浏览器执行JavaScript脚本时,会检查当前请求是否 同源,如果不是同源资源,就不会被执行。

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_java_06

 比如:

1、编写控制器方法
@RequestMapping("/m3")@ResponseBody
public String m3(){
    System.out.println("测试跨域请求");
    return "success";
}
2、编写JSP页面,发送异步请求
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html>
    <head>
        <title>跨域请求</title>
        <script src="/js/jquery2.1.1.min.js"></script>
        <script>
            $(function (){
                $("#btn").click(function() {
                    //$.get("http://localhost:8080/m3",function(data) {
                    //    console.log(data);
                    // })
                  $.get("http://127.0.0.1:80

80/m3",function(data) { console.log(data); }) }) }) </script> </head> <body> <button id="btn">异步请求</button> </body> </html>

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_原力计划_07

 SpringMVC跨域请求_控制器接收跨域请求

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_SpringMVC_08

SpringMVC提供了注解@CrossOrigin解决跨域问题。用法如下:

@RequestMapping("/m3")
@ResponseBody
// 如果请求从http://localhost:8080发出,则允许跨域访问
@CrossOrigin("http://localhost:8080")
public String m3(){
    System.out.println("测试跨域请求");
    return "success";
}

SSM整合_需求分析

接下来我们使用Maven+Spring+MyBatis+SpringMVC完成一个案 例,案例需求为在页面可以进行添加学生+查询所有学生!

案例需要使用以下技术:

1、使用Maven创建聚合工程,并使用Maven的tomcat插件运行工 程

2、使用Spring的IOC容器管理对象

3、使用MyBatis操作数据库

4、使用Spring的声明式事务进行事务管理

5、使用SpringMVC作为控制器封装Model并跳转到JSP页面展示数据

6、使用Junit测试方法

7、使用Log4j在控制台打印日志


案例的编写流程如下:

1、创建maven父工程,添加需要的依赖和插件

2、创建dao子工程,配置MyBatis操作数据库,配置Log4j在控制台 打印日志。

3、创建service子工程,配置Spring声明式事务

4、创建controller子工程,配置SpringMVC作为控制器,编写JSP页 面展示数据。

5、每个子工程都使用Spring进行IOC管理

# 准备数据库数据
CREATE DATABASE `student`;
USE `student`;
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(255) DEFAULT NULL,
  `sex` VARCHAR(10) DEFAULT NULL,
  `address` VARCHAR(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=INNODB CHARSET=utf8;
INSERT  INTO `student`(`id`,`name`,`sex`,`address`)
VALUES (1,'程序员','男','北京'),(2,'辛苦学堂','女','北京');

 SSM整合_创建父工程

创建maven父工程,添加需要的依赖和插件

<properties>
    <!--Spring版本-->
  <spring.version>5.2.12.RELEASE</spring.version>
</properties>
<dependencies>
    <!-- mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.7</version>
    </dependency>
    <!-- mysql驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </dependency>
    <!-- druid连接池 -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.2.8</version>
    </dependency>
    <!-- MyBatis与Spring的整合包-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.6</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!-- springmvc -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!-- 事务 -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.8.7</version>
    </dependency>
    <!-- jstl -->
    <dependency>
        <groupId>org.apache.taglibs</groupId>
        <artifactId>taglibs-standard-spec</artifactId>
        <version>1.2.5</version>
    </dependency>
    <dependency>
        <groupId>org.apache.taglibs</groupId>
        <artifactId>taglibs-standard-impl</artifactId>
        <version>1.2.5</version>
    </dependency>
    <!-- servlet -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <!-- jsp -->
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
    <!-- junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}
</version>
    </dependency>
    <!-- log4j -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.12</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <!-- tomcat插件 -->
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-mavenplugin</artifactId>
            <version>2.1</version>
            <configuration>
                <port>8080</port>
                <path>/</path>
                <uriEncoding>UTF8</uriEncoding>
                <server>tomcat7</server>
                <systemProperties>
                  <java.util.logging.SimpleFormatter.format>
                      %1$tH:%1$tM:%1$tS %2$s%n%4$s: %5$s%6$s%n
                  </java.util.logging.SimpleFormatter.format>
                </systemProperties>
            </configuration>
        </plugin>
   </plugins>
</build>

SSM整合_创建dao子工程

1、在父工程下创建maven普通java子工程
2、编写实体类
public class Student {    private int id;
    private String name;
    private String sex;
    private String address;
    // 省略getter/setter/tostring/构造方法
}
3、编写持久层接口
@Repositorypublic interface StudentDao {
    // 查询所有学生
    @Select("select * from student")
    List<Student> findAll();
    
    // 添加学生
    @Insert("insert into student values(null,#{name},#{sex},#{address})")
    void add(Student student);
}
4、编写log4j.properties配置文件
log4j.rootCategory=debug, CONSOLE, LOGFILElog4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[%d{MM/dd HH:mm:ss}] %-6r [%15.15t]
%-5p %30.30c %x - %m\n
5、编写数据库配置文件druid.properties
jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql:///student
jdbc.username=root
jdbc.password01=root
6、编写MyBatis配置文件SqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>
7、编写Spring配置文件applicationContext-dao.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:context="http://www.springframework.org/schema/context"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
                          http://www.springframework.org/schema/beans/spring-beans.xsd
                          http://www.springframework.org/schema/context
                          http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 读取数据库配置文件 -->
    <context:property-placeholder location="classpath:druid.properties">
</context:property-placeholder>
    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!-- SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:SqlMapConfig.xml">
</property>
    </bean>
    <!-- 配置扫描包对象,为包下的接口创建代理对象 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itbaizhan.dao"></property>
    </bean>
</beans>
8、测试持久层接口的方法
@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = "classpath:applicationContext-dao.xml")
public class StudentDaoTest {
    @Autowired
    private StudentDao studentDao;
    @Test
    public void testFindAll(){
        List<Student> all = studentDao.findAll();
        all.forEach(System.out::println);
   }
    @Test
    public void testAdd(){
        Student student = new Student(0,"SXT", "女", "上海");
        studentDao.add(student);
   }
}

SSM整合_创建service子工程 

1、在父工程下创建maven普通java子工程
2、service子工程引入dao子工程的依赖
<dependencies>    <dependency>
        <groupId>com.tong</groupId>
        <artifactId>ssm_dao</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
</dependencies>
3、创建服务层方法
@Servicepublic class StudentService {
    @Autowired
    private StudentDao studentDao;
    public List<Student> findAllStudent(){
        return studentDao.findAll();
   }
    
    public void addStudent(Student student){
        studentDao.add(student);
   }
}
4、创建服务层的Spring配置文件applicationContextservice.xml,配置声明式事务
<?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:context="http://www.springframework.org/schema/context"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 包扫描 -->
    <context:component-scan basepackage="com.tong.service"></context:component-scan>
    <!-- 事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 通知 -->
    <tx:advice id="txAdvice" transactionmanager="transactionManager">
        <tx:attributes>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
    
    <!-- 切面 -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.itbaizhan.service.*.*(..))"></aop:advisor>
    </aop:config>
</beans>

SSM整合_创建controller子工程 

1、在父工程下使用maven创建web类型子工程
2、controller工程引入service子工程的依赖,并配置ssm父工程
<parent>    <artifactId>ssm_demo</artifactId>
    <groupId>com.tong</groupId>
    <version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
    <dependency>
        <groupId>com.tong</groupId>
        <artifactId>ssm_service</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
</dependencies>
3、编写控制器类
@Controller@RequestMapping("/student")
public class StudentController {
    @Autowired
    private StudentService studentService;
    @RequestMapping("/all")
    public String all(Model model){
        List<Student> allStudent = studentService.findAllStudent();
        model.addAttribute("students",allStudent);
        return "allStudent";
 }
    
    @RequestMapping("/add")
    public String add(Student student){
        studentService.addStudent(student);
        // 重定向到查询所有学生
        return "redirect:/student/all";
   }
}
4、编写SpringMVC配置文件springmvc.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:mvc="http://www.springframework.org/schema/mvc"
      xmlns:context="http://www.springframework.org/schema/context"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 扫描Controller包 -->
    <context:component-scan basepackage="com.tong.controller"/>
    <!-- 配置视图解析器 -->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.vie
w.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!-- 开启SpringMVC注解的支持 -->
    <mvc:annotation-driven/>
    <!-- 放行静态资源 -->
    <mvc:default-servlet-handler />
</beans>
5、编写Spring的总配置文件applicationContext.xml,该文件引入 dao和service层的Spring配置文件
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd">
    <import resource="applicationContextdao.xml"></import>
    <import resource="applicationContextservice.xml"></import>
</beans>
6、在web.xml中配置Spring监听器,该监听器会监听服务器启动, 并自动创建Spring的IOC容器
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
        http://xmlns.jcp.org/xml/ns/javaee/webapp_3_1.xsd"
         version="3.1">
    <display-name>Archetype Created Web Application</display-name>
    <!-- 创建spring容器的监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
</web-app>
7、在web.xml中配置SpringMVC的前端控制器和编码过滤器
<!--前端控制器--><servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
  <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
<!--编码过滤器-->
<filter>
    <filter-name>encFilter</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>encFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
8、编写JSP页面allStudent.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
    <head>
        <title>所有学生</title>
    </head>
    <body>
       <%-- 添加学生表单 --%>
        <form action="/student/add" method="post">
           姓名:<input name="name">
           性别:<input name="sex">
           地址:<input name="address">
            <input type="submit" value="提交">
        </form>
       <%-- 展示学生表格 --%>
        <table width="500" cellpadding="0" cellspacing="0" border="1" align="center">
            <tr>
                <th>id</th>
                <th>姓名</th>
                <th>性别</th>
                <th>地址</th>
            </tr>
            <c:forEach items="${students}" var="student">
                <tr>
                    <td>${student.id}</td>
                    <td>${student.name}</td>
                    <td>${student.sex}</td>
                    <td>${student.address}</td>
                </tr>
            </c:forEach>
        </table>
    </body>
</html>

SSM整合_运行项目 

1、在idea中配置使用tomcat插件启动maven父项目

SpringMVC【SpringMVC拦截器、 SpringMVC跨域请求、SSM整合】(七)-全面详解(学习总结---从入门到深化)_跨域请求_09

 2、启动项目,访问http://localhost:8080/student/all

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