• StudentManagerSSM


    web.xml              StudentManagerSSM.rar

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://java.sun.com/jsf/composite"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
             version="3.1">
    
        <display-name>Archetype Created Web Application</display-name>
    
        <listener>
            <listener-class>com.kikyo.listener.StartSystemListener</listener-class>
        </listener>
    
        <!-- 编码过滤器 -->
        <filter>
            <filter-name>encodingFilter</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>encodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
        <!-- 配置DispatcherServlet -->
        <servlet>
            <servlet-name>SpringMVC</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!-- 配置springMVC需要加载的配置文件-->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/spring-*.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
            <async-supported>true</async-supported>
        </servlet>
        <servlet-mapping>
            <servlet-name>SpringMVC</servlet-name>
            <!-- 匹配所有请求 -->
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    
        <servlet-mapping>
            <servlet-name>default</servlet-name>
            <url-pattern>*.jpg</url-pattern>
        </servlet-mapping>
        <servlet-mapping>
            <servlet-name>default</servlet-name>
            <url-pattern>*.js</url-pattern>
        </servlet-mapping>
        <servlet-mapping>
            <servlet-name>default</servlet-name>
            <url-pattern>*.css</url-pattern>
        </servlet-mapping>
    
    </web-app>

    spring-mvc.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"
           xmlns:mvc="http://www.springframework.org/schema/mvc"
           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/mvc
           http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    
        <!-- 扫描web相关的bean -->
        <context:component-scan base-package="com.kikyo.controller"/>
    
        <!-- 开启SpringMVC注解模式 -->
        <mvc:annotation-driven/>
    
        <!-- 配置jsp 显示ViewResolver -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
            <property name="prefix" value="/WEB-INF/views/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
    </beans>

     ------

        <!-- 配置springmvc对文件上传的支持 -->
        <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <!-- 设置文件名的编码 -->
            <property name="defaultEncoding" value="utf-8"></property>
            <!-- 配置最上传文件的支持 20M -->
            <property name="maxUploadSize" value="20971520"></property>
            <!-- 设置文件上传的临时目录 -->
            <property name="uploadTempDir" value="upload/temp" />
        </bean>
    
        <!-- 设置静态资源不过滤 -->
        <mvc:resources location="/css/" mapping="/css/**" />
        <mvc:resources location="/images/" mapping="/images/**" />
        <mvc:resources location="/js/" mapping="/js/**" />
    
        <!-- 配置静态文件放行 -->
        <mvc:default-servlet-handler />

    spring-mybatis.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" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    
        <!-- 扫描service包下所有使用注解的类型 -->
        <context:component-scan base-package="com.kikyo.service"/>
    
        <!-- 配置数据库相关参数properties的属性:${url} -->
        <context:property-placeholder location="classpath:properties/jdbc.properties"/>
    
        <!-- 数据库连接池 -->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driver}"/>
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
            <property name="maxPoolSize" value="${c3p0.maxPoolSize}"/>
            <property name="minPoolSize" value="${c3p0.minPoolSize}"/>
            <property name="autoCommitOnClose" value="${c3p0.autoCommitOnClose}"/>
            <property name="checkoutTimeout" value="${c3p0.checkoutTimeout}"/>
            <property name="acquireRetryAttempts" value="${c3p0.acquireRetryAttempts}"/>
        </bean>
    
        <!-- 配置SqlSessionFactory对象 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 注入数据库连接池 -->
            <property name="dataSource" ref="dataSource"/>
            <!-- 扫描entity包 使用别名 -->
            <property name="typeAliasesPackage" value="com.kikyo.entity"/>
            <!-- 扫描sql配置文件:mapper需要的xml文件 -->
            <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        </bean>
    
        <!-- 配置扫描Dao接口包,动态实现Dao接口,注入到spring容器中 -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <!-- 注入sqlSessionFactory -->
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
            <!-- 给出需要扫描Dao接口包 -->
            <property name="basePackage" value="com.kikyo.dao"/>
        </bean>
    
        <!-- 配置事务管理器 -->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <!-- 注入数据库连接池 -->
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        <!-- 配置基于注解的声明式事务 -->
        <tx:annotation-driven transaction-manager="transactionManager"/>
        
    </beans>

     1

        <!-- 配置SqlSessionFactory对象 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 注入数据库连接池 -->
            <property name="dataSource" ref="dataSource"/>
            <!-- 扫描entity包 使用别名 -->
            <property name="typeAliasesPackage" value="com.kikyo.*.domain"/>
            <!-- 扫描sql配置文件:mapper需要的xml文件 -->
            <property name="mapperLocations" value="classpath:mapper/*/*.xml"/>
        </bean>
    
        <!-- 配置扫描Dao接口包,动态实现Dao接口,注入到spring容器中 -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <!-- 注入sqlSessionFactory -->
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
            <!-- 给出需要扫描Dao接口包 -->
            <property name="basePackage" value="com.kikyo.*.mapper"/>
        </bean>

    pom.xml

        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <maven.compiler.source>1.8</maven.compiler.source>
            <maven.compiler.target>1.8</maven.compiler.target>
            <!-- 设置项目编码编码 -->
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <!-- spring版本号 -->
            <spring.version>4.3.5.RELEASE</spring.version>
            <!-- mybatis版本号 -->
            <mybatis.version>3.4.1</mybatis.version>
            <ehcache.version>2.6.11</ehcache.version>
            <ehcache-web.version>2.0.4</ehcache-web.version>
        </properties>
    
        <dependencies>
    
            <!-- CACHE begin -->
            <dependency>
                <groupId>net.sf.ehcache</groupId>
                <artifactId>ehcache-core</artifactId>
                <version>${ehcache.version}</version>
            </dependency>
            <dependency>
                <groupId>net.sf.ehcache</groupId>
                <artifactId>ehcache-web</artifactId>
                <version>${ehcache-web.version}</version>
            </dependency>
            <dependency>
                <groupId>redis.clients</groupId>
                <artifactId>jedis</artifactId>
                <version>2.5.1</version>
            </dependency>
            <!-- CACHE end -->
    
            <!-- jstl标签 -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            <dependency>
                <groupId>org.apache.taglibs</groupId>
                <artifactId>taglibs-standard-impl</artifactId>
                <version>1.2.5</version>
            </dependency>
    
    
            <!-- java ee -->
            <dependency>
                <groupId>javax</groupId>
                <artifactId>javaee-api</artifactId>
                <version>7.0</version>
            </dependency>
    
            <!-- 单元测试 -->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
    
            <!-- 实现slf4j接口并整合 -->
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
                <version>1.2.2</version>
            </dependency>
    
            <!-- JSON -->
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.8.7</version>
            </dependency>
    
    
            <!-- 数据库 -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.41</version>
                <scope>runtime</scope>
            </dependency>
    
            <!-- 数据库连接池 -->
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.5.2</version>
            </dependency>
    
            <!-- MyBatis -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
    
            <!-- mybatis/spring整合包 -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.3.1</version>
            </dependency>
    
            <!-- Spring -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${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>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring.version}</version>
            </dependency>
    
        </dependencies>
    View Code

    StartSystemListener

    import javax.servlet.ServletContext;
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;
    
    public class StartSystemListener implements ServletContextListener {
        @Override
        public void contextInitialized(ServletContextEvent sce) {
            //1.将项目上下文路径(request.getContextPath())放置到application域中.
            ServletContext application = sce.getServletContext();
            application.setAttribute("ctx", application.getContextPath());
            System.err.println("---------Servlet容器创建成功 ctx 被放到ServletContext作用域-------");
    
            //2.加载所有许可路径
            //ApplicationContext ioc = WebApplicationContextUtils.getWebApplicationContext(application);
        }
    
        @Override
        public void contextDestroyed(ServletContextEvent sce) {
    
        }
    }

     StudentController

    package com.kikyo.controller;
    
    import com.kikyo.entity.Student;
    import com.kikyo.service.StudentService;
    import com.kikyo.util.Page;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.List;
    
    @Controller
    @RequestMapping("")
    public class StudentController {
    
        @Autowired
        private StudentService studentService;
    
        @RequestMapping("/addStudent")
        public String addStudent(HttpServletRequest request, HttpServletResponse response) {
    
            Student student = new Student();
    
            int studentID = Integer.parseInt(request.getParameter("student_id"));
            String name = request.getParameter("name");
            int age = Integer.parseInt(request.getParameter("age"));
            String sex = request.getParameter("sex");
            Date birthday = null;
            // String 类型按照 yyyy-MM-dd 的格式转换为 java.util.Date 类
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            try {
                birthday = simpleDateFormat.parse(request.getParameter("birthday"));
            } catch (ParseException e) {
                e.printStackTrace();
            }
    
            student.setStudent_id(studentID);
            student.setName(name);
            student.setAge(age);
            student.setSex(sex);
            student.setBirthday(birthday);
    
            studentService.addStudent(student);
    
            return "redirect:listStudent";
        }
    
        @RequestMapping("/listStudent")
        public String listStudent(HttpServletRequest request, HttpServletResponse response) {
    
            // 获取分页参数
            int start = 0;
            int count = 10;
    
            try {
                start = Integer.parseInt(request.getParameter("page.start"));
                count = Integer.parseInt(request.getParameter("page.count"));
            } catch (Exception e) {
            }
    
            Page page = new Page(start, count);
    
            List<Student> students = studentService.list(page.getStart(), page.getCount());
            int total = studentService.getTotal();
            page.setTotal(total);
    
            request.setAttribute("students", students);
            request.setAttribute("page", page);
    
            return "listStudent";
        }
    
        @RequestMapping("/deleteStudent")
        public String deleteStudent(int id) {
            studentService.deleteStudent(id);
            return "redirect:listStudent";
        }
    
        @RequestMapping("/editStudent")
        public ModelAndView editStudent(int id) {
            ModelAndView mav = new ModelAndView("editStudent");
            Student student = studentService.getStudent(id);
            mav.addObject("student", student);
            return mav;
        }
    
        @RequestMapping("/updateStudent")
        public String updateStudent(HttpServletRequest request, HttpServletResponse response) {
    
            Student student = new Student();
    
            int id = Integer.parseInt(request.getParameter("id"));
            int student_id = Integer.parseInt(request.getParameter("student_id"));
            String name = request.getParameter("name");
            int age = Integer.parseInt(request.getParameter("age"));
            String sex = request.getParameter("sex");
    
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            Date birthday = null;
            try {
                birthday = simpleDateFormat.parse(request.getParameter("birthday"));
            } catch (ParseException e) {
                e.printStackTrace();
            }
    
            student.setId(id);
            student.setStudent_id(student_id);
            student.setName(name);
            student.setAge(age);
            student.setSex(sex);
            student.setBirthday(birthday);
    
            studentService.updateStudent(student);
            return "redirect:listStudent";
        }
    }

    StudentService

    package com.kikyo.service;
    
    import com.kikyo.entity.Student;
    
    import java.util.List;
    
    public interface StudentService {
    
        /**
         * 获取到 Student 的总数
         * @return
         */
        int getTotal();
    
        /**
         * 增加一条数据
         * @param student
         */
        void addStudent(Student student);
    
        /**
         * 删除一条数据
         * @param id
         */
        void deleteStudent(int id);
    
        /**
         * 更新一条数据
         * @param student
         */
        void updateStudent(Student student);
    
        /**
         * 找到一条数据
         * @param id
         * @return
         */
        Student getStudent(int id);
    
        /**
         * 列举出从 start 位置开始的 count 条数据
         * @param start
         * @param count
         * @return
         */
        List<Student> list(int start, int count);
    }

    StudentServiceImpl

    package com.kikyo.service;
    
    import com.kikyo.dao.StudentDao;
    import com.kikyo.entity.Student;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    @Service
    public class StudentServiceImpl implements StudentService {
    
        @Autowired
        StudentDao studentDao;
    
        public int getTotal() {
            return studentDao.getTotal();
        }
    
        public void addStudent(Student student) {
            studentDao.addStudent(student);
        }
    
        public void deleteStudent(int id) {
            studentDao.deleteStudent(id);
        }
    
        public void updateStudent(Student student) {
            studentDao.updateStudent(student);
        }
    
        public Student getStudent(int id) {
            return studentDao.getStudent(id);
        }
    
        public List<Student> list(int start, int count) {
            return studentDao.list(start, count);
        }
    }

    StudentDao

    package com.kikyo.dao;
    
    import com.kikyo.entity.Student;
    
    import java.util.List;
    
    public interface StudentDao {
        int getTotal();
        void addStudent(Student student);
        void deleteStudent(int id);
        void updateStudent(Student student);
        Student getStudent(int id);
        List<Student> list(int start, int count);
    }

    StudentDao.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <!-- 将namespace的值设置为DAO类对应的路径 -->
    <mapper namespace="com.kikyo.dao.StudentDao">
    
        <!-- 查询数据条目 -->
        <select id="getTotal" resultType="int">
            SELECT COUNT(*) FROM student
        </select>
    
        <!-- 增加一条数据 -->
        <insert id="addStudent" parameterType="Student">
            INSERT INTO student VALUES(NULL, #{student_id}, #{name}, #{age}, #{sex}, #{birthday})
        </insert>
    
        <!-- 删除一条数据 -->
        <delete id="deleteStudent" parameterType="int">
            DELETE FROM student WHERE id = #{id}
        </delete>
    
        <!-- 更新一条数据 -->
        <update id="updateStudent" parameterType="Student">
            UPDATE student SET student_id = #{student_id}, name = #{name},
            age = #{age}, sex = #{sex}, birthday = #{birthday} WHERE id = #{id}
        </update>
    
        <!-- 查询一条数据 -->
        <select id="getStudent" resultMap="student" parameterType="int">
            SELECT * FROM student WHERE id = #{id}
        </select>
    
        <resultMap id="student" type="student">
            <id column="id" property="id"/>
            <result column="student_id" property="student_id"/>
            <result column="name" property="name"/>
            <result column="age" property="age"/>
            <result column="sex" property="sex"/>
            <result column="birthday" property="birthday" javaType="java.sql.Date"/>
        </resultMap>
    
        <!-- 查询从start位置开始的count条数据-->
        <select id="list" resultMap="student">
            SELECT * FROM student ORDER BY student_id desc limit #{param1}, #{param2}
        </select>
    </mapper>

    Student

    package com.kikyo.entity;
    
    import java.util.Date;
    
    public class Student {
    
        private int id;
        private int student_id;
        private String name;
        private int age;
        private String sex;
        private Date birthday;
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public int getStudent_id() {
            return student_id;
        }
    
        public void setStudent_id(int student_id) {
            this.student_id = student_id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public String getSex() {
            return sex;
        }
    
        public void setSex(String sex) {
            this.sex = sex;
        }
    
        public Date getBirthday() {
            return birthday;
        }
    
        public void setBirthday(Date birthday) {
            this.birthday = birthday;
        }
    }

     Page

    package com.kikyo.util;
    
    public class Page {
    
        int start;      // 开始数据
        int count;      // 每一页的数量
        int total;      // 总共的数据量
    
        public Page(int start, int count) {
            super();
            this.start = start;
            this.count = count;
        }
    
        public boolean isHasPreviouse() {
            if (start == 0)
                return false;
            return true;
        }
    
        public boolean isHasNext() {
            if (start == getLast())
                return false;
            return true;
        }
    
        public int getTotalPage() {
            int totalPage;
            // 假设总数是50,是能够被5整除的,那么就有10页
            if (0 == total % count)
                totalPage = total / count;
                // 假设总数是51,不能够被5整除的,那么就有11页
            else
                totalPage = total / count + 1;
    
            if (0 == totalPage)
                totalPage = 1;
            return totalPage;
    
        }
    
        public int getLast() {
            int last;
            // 假设总数是50,是能够被5整除的,那么最后一页的开始就是40
            if (0 == total % count)
                last = total - count;
                // 假设总数是51,不能够被5整除的,那么最后一页的开始就是50
            else
                last = total - total % count;
    
            last = last < 0 ? 0 : last;
            return last;
        }
    
        public int getStart() {
            return start;
        }
    
        public void setStart(int start) {
            this.start = start;
        }
    
        public int getCount() {
            return count;
        }
    
        public void setCount(int count) {
            this.count = count;
        }
    
        public int getTotal() {
            return total;
        }
    
        public void setTotal(int total) {
            this.total = total;
        }
    }

    学生管理系统(SSM简易版)总结

    importjavax.servlet.ServletContext;
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;

    public class StartSystemListener implements ServletContextListener {
    @Override
    public void contextInitialized(ServletContextEvent sce) {
    //1.将项目上下文路径(request.getContextPath())放置到application域中.
    ServletContext application = sce.getServletContext();
    application.setAttribute("ctx", application.getContextPath());
    System.err.println("---------Servlet容器创建成功 APP_PATH 被放到ServletContext作用域-------");

    //2.加载所有许可路径
    //ApplicationContext ioc = WebApplicationContextUtils.getWebApplicationContext(application);
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {

    }
    }
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  • 原文地址:https://www.cnblogs.com/kikyoqiang/p/12171552.html
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