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)
标签: 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) JavaScript博客 51CTO博客
2023-07-23 18:24:16 135浏览
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
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
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:
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
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。
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跨域请求_控制器接收跨域请求
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
2、启动项目,访问http://localhost:8080/student/all
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