Spring MVC学习笔记和SSH的整合

1. Spring MVC

Spring MVC 是目前主流的实现MVC设计模式的企业级开发框架，Spring框架的一个子模块，无需整合，开发起来更加便捷。

2. 什么是MVC

Controller
Model
View

3. SpringMVC的核心组件

DispatcherServler 前置控制器，相当于总调度。
Handler 处理器，相当于Servler或Action。
HandlerMapping 相当于路由交换。
handlerIntercepetor 处理器拦截器。
HandlerExecutionChain 处理器执行链。
HandlerAdapter 处理适配器
ModelAndView装载了模型数据和视图信息。
ViewResouler 视图解析器。

4. Spring MVC 的工作流程。

客户端请求被DispatcherServlet 接收

根据HandlerMapping 映射到 Handler。

生成Handler 和HandlerInterceptor。

Handler 和HandletInterceptor 。。

5. 创建项目及入门程序

Spring MVC学习笔记和SSH的整合

1. 配置web.xml 的servlet接收请求

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>

    <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>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

2.新建springmvc.xml 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"
       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-3.2.xsd">


<!--开启注解扫描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀/index的/-->
        <property name="prefix" value="/"></property>
        <!--后缀 /index.jsp 的jsp-->
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

新建handler

package com.liyong.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

// 注册为handler
@Controller
@RequestMapping("/hello")
public class HelloController {

    // url 映射
    @RequestMapping(path = "/index")
    public String sayHello() {
        System.out.println("执行了index");
        return "index";
    }
}

6. Spring 注解

@Controller 在类定义处添加，结合spring 的loc自动扫描使用。
@RequestMapping 该注解将url请求和业务方法进行映射，在类和方法前都可以添加。

- value 指定url 的实际地址，也是requestMapping的默认值
- method 指定请求的method 类型。
- params 指定请求中必须包含某些参数，否则无法访问

@RequestMapping(path = "/params", params = {"name", "id"})
@ResponseBody
public String params(@RequestParam("name") String name, @RequestParam("id") Integer id) {
    System.out.println(name);
    System.out.println(id);
    return "name" + name + " id" + id;
}

// 接收对象。
// 默认接收中文 会乱码，需要增加filter
@RequestMapping(value = "/submit", method = RequestMethod.POST)
@ResponseBody
public String submit(User user) {
    return "name:" + user.getName() + " id:" + user.getId();
}

- @CookieValue 获取cookie 值

@RequestMapping("/getCookie")
@ResponseBody
public String index2(@CookieValue(value = "JSESSIONID") String test1) {
    return test1;
}

@RequestParam("name") 注解在形参上，代表当前形参和params 对应。

- requried 是否必传
- value 参数名代表参数key
- defaultValue 默认值

@RequestBody 代表这个请求是返回响应对象而非视图解析器
@PathVariable 表示获取路径参数
@RestController 表示处理器会把返回数据直接返回给客户端，不经过视图响应，注解在类上。
@RequestBody 打在参数上，获取json数据
@GetMpapping 表示get请求
@PostMapping 表示post请求
@PutMapping 表示put 请求
@DeleteMapping 表示delete 请求

7. Spring MVC数据绑定

数据绑定：在后端业务方法中直接获取客户端HTTP请求中的参数，将请求参数映射到业务方法的形参中，springMVC 的数据绑定是由HandlerAdaptter 来完成的。

基本数据类型

@RequestMapping("/baseType")
@ResponseBody
public String baseType(int id){
    return id + "";
}

包装类

包装类可以接受null。

@RequestMapping("packageType")
@ResponseBody
public String packageType(Integer id){
    return id + "";
}

List (content-type 为 x-www-urlencoded)

增加entity 类，必须具备构造方法和set 方法。

package com.liyong.entity;

public class User {
  private Integer id;
  private String name;

  public User() {
  }

  public User(Integer id, String name) {
    this.id = id;
    this.name = name;
  }

  public Integer getId() {
    return id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String toString() {
    return "User{" +
      "id=" + id +
      ", name='" + name + '\'' +
      '}';
  }
}

增加方法入参

@RequestMapping(value = "/list", method = RequestMethod.POST)
@ResponseBody
public String postList(UserList userList) {
    return userList.toString();
}

Map(content-type 为 x-www-urlencoded)

封装mapentity类

package com.liyong.entity;

import java.util.Map;

public class UserMap {
    private Map<String, User> userMap;

    public UserMap(Map<String, User> userMap) {
        this.userMap = userMap;
    }

    public UserMap() {
    }

    public Map<String, User> getUserMap() {
        return userMap;
    }

    public void setUserMap(Map<String, User> userMap) {
        this.userMap = userMap;
    }

    @Override
    public String toString() {
        return "UserMap{" +
                "userMap=" + userMap +
                '}';
    }
}

编写handler处理逻辑

@RequestMapping(value = "/map", method = RequestMethod.POST)
@ResponseBody
public String postMap(UserMap userMap) {
    return userMap.getUserMap().toString();
}

JSON：java默认无法直接把json 转换为 java对象

安装fastjson
配置再springmvc.xml 中

<?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-3.2.xsd">


    <!--开启注解扫描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀/index的/-->
        <property name="prefix" value="/"></property>
        <!--后缀 /index.jsp 的jsp-->
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--处理响应乱码-->
    <mvc:annotation-driven>
        <!-- 消息转换器 转换响应格式 为UTF-8 -->
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes" value="text/html;charset=UTF8"></property>
            </bean>

            <!--配置fastjson-->
            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json</value>
                        <value>application/json;charset=UTF-8</value>
                        <value>application/atom+xml</value>
                        <value>application/x-www-form-urlencoded</value>
                        <value>application/octet-stream</value>
                        <value>application/pdf</value>
                        <value>application/rss+xml</value>
                        <value>application/xhtml+xml</value>
                        <value>application/xml</value>
                        <value>image/gif</value>
                        <value>image/jpeg</value>
                        <value>image/png</value>
                        <value>text/event-stream</value>
                        <value>text/html</value>
                        <value>text/markdown</value>
                        <value>text/plain</value>
                        <value>text/xml</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

接收json

@RequestMapping(value = "/json", method = RequestMethod.POST)
@ResponseBody
public User postJson(@RequestBody User user) {
    System.out.println(user);
    user.setId(223);
    user.setName("哈哈哈");
    return user;
}

8. Response 响应和Request

安装servlet

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>4.0.1</version>
  <scope>provided</scope>
</dependency>

设置content-type 和增加cookie

 @RequestMapping("/cookiePage")
  @ResponseBody
  public String cookiePage(HttpServletResponse res) {
    res.addCookie(new Cookie("hello", "123"));
    res.setContentType("text/json;charset=UTF-8");
    return "你好啊";
  }

Spring MVC学习笔记和SSH的整合

9. REST 架构

get 获取资源
post 新增资源
put 修改资源
delete 删除资源

其他

增加filter 解决请求中文乱码问题，在web.xml中添加 spring 自带的 filter 做encoding

  <!--配置编码过滤器-->
  <filter>
    <filter-name>characterEncodingFilter</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>

  <!--配置filter 生效路由-->
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

Rest 增删查改

编写DAO和实现类

package com.liyong.dao;

import com.liyong.entity.User;

import java.util.Collection;
import java.util.List;

public interface UserDAO {
    String create(User user);

    Collection<User> findAllUser();

    User findUserById(Integer id);

    String deleteUserById(Integer id);

    String updateUserById(Integer id, User user);
}

package com.liyong.dao;

import com.liyong.entity.User;
import com.liyong.entity.UserMap;
import org.springframework.stereotype.Repository;

import java.util.*;


@Repository
public class UserDAOImpl implements UserDAO {

    private static Map<Integer, User> userMap;

    static {
        System.out.println("UserDAOImpl static");
        userMap = new HashMap<Integer, User>();
        userMap.put(1, new User(1, "李先生"));
        userMap.put(2, new User(2, "憨憨刘"));
    }

    @Override
    public String create(User user) {
        userMap.put(userMap.size() + 1, user);
        return "success";
    }

    @Override
    public Collection<User> findAllUser() {
        return userMap.values();
    }

    @Override
    public User findUserById(Integer id) {
        return userMap.get(id);
    }

    @Override
    public String deleteUserById(Integer id) {
        userMap.remove(id);
        return "success";
    }

    @Override
    public String updateUserById(Integer id, User user) {
        userMap.put(id, user);
        return "success";
    }
}

编写services 和实现类

package com.liyong.services;

import com.liyong.entity.User;

import java.util.Collection;

public interface UserServices {
    String create(User user);

    Collection<User> findAllUser();

    User findUserById(Integer id);

    String deleteUserById(Integer id);

    String updateUserById(Integer id, User user);
}


package com.liyong.services;


import com.liyong.dao.UserDAOImpl;
import com.liyong.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Collection;

@Service
public class UserServicesImpl implements UserServices {

    @Autowired
    private UserDAOImpl userDAOImpl;

    @Override
    public String create(User user) {
        return userDAOImpl.create(user);
    }

    @Override
    public Collection<User> findAllUser() {
        return userDAOImpl.findAllUser();
    }

    @Override
    public User findUserById(Integer id) {
        return userDAOImpl.findUserById(id);
    }

    @Override
    public String deleteUserById(Integer id) {
        return userDAOImpl.deleteUserById(id);
    }

    @Override
    public String updateUserById(Integer id, User user) {
        return userDAOImpl.updateUserById(id, user);
    }
}

编写处理器

package com.liyong.controller;

import com.liyong.entity.User;
import com.liyong.services.UserServicesImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.Collection;

@RestController
@RequestMapping("/api/user")
public class UserRESTController {

    @Autowired
    private UserServicesImpl userServices;

    @PostMapping("/createUser")
    public String create(@RequestBody User user) {
        return userServices.create(user);
    }

    @GetMapping("/findAllUser")
    public Collection<User> findAllUser() {
        return userServices.findAllUser();
    }

    @GetMapping("/findUser/{id}")
    public User findUserById(@PathVariable Integer id) {
        return userServices.findUserById(id);
    }

    @DeleteMapping("/deleteUser/{id}")
    public String deleteUserById(@PathVariable Integer id) {
        return userServices.deleteUserById(id);
    }

    @PutMapping("/updateUserById/{id}")
    public String updateUserById(@PathVariable Integer id, @RequestBody User user) {
        return userServices.updateUserById(id, user);
    }
}

10. 文件的上传和下载

文件上传

底层采用 apache fileupload

1. 增加依赖

<dependency>
  <groupId>commons-io</groupId>
  <artifactId>commons-io</artifactId>
  <version>2.5</version>
</dependency>

<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.3</version>
</dependency>

2. springmvc.xml 中增加上传组件的配置

<?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-3.2.xsd">


    <!--开启注解扫描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀/index的/-->
        <property name="prefix" value="/"></property>
        <!--后缀 /index.jsp 的jsp-->
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--上传组件-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="defaultEncoding" value="utf-8"/>
        <property name="maxUploadSize" value="#{1024*1024}"/>
    </bean>

    <!--处理响应乱码-->
    <mvc:annotation-driven>
        <!-- 消息转换器 转换响应格式 为UTF-8 -->
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes" value="text/html;charset=UTF8"></property>
            </bean>

            <!--配置fastjson-->
            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json</value>
                        <value>application/json;charset=UTF-8</value>
                        <value>application/atom+xml</value>
                        <value>application/x-www-form-urlencoded</value>
                        <value>application/octet-stream</value>
                        <value>application/pdf</value>
                        <value>application/rss+xml</value>
                        <value>application/xhtml+xml</value>
                        <value>application/xml</value>
                        <value>image/gif</value>
                        <value>image/jpeg</value>
                        <value>image/png</value>
                        <value>text/event-stream</value>
                        <value>text/html</value>
                        <value>text/markdown</value>
                        <value>text/plain</value>
                        <value>text/xml</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

3. 接收文件上传

package com.liyong.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;

@RestController
@RequestMapping("/api/file")
public class FileController {

    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    public String upload(MultipartFile file, HttpServletRequest req) throws IOException {
        System.out.println(file);
        if (file == null || file.getSize() == 0) {
            return "failed";
        }
        // 获取servlet context 下的file 文件路径
        String servletPath = req.getSession().getServletContext().getRealPath("file");
        // 获取文件名
        String name = file.getOriginalFilename();

        // 新建文件
        File file1 = new File(servletPath, name);
        // 写入到文件
        file.transferTo(file1);

        return "success";
    }

}

Spring MVC学习笔记和SSH的整合

文件下载

@RequestMapping("/download")
public String download(HttpServletRequest req, HttpServletResponse res) throws IOException {
    String path = req.getSession().getServletContext().getRealPath("file");
    FileInputStream in = new FileInputStream(path + "\\QQ浏览器截图20200728231741.png");

    res.setHeader("Content-Type", "application/x-msdownload");
    res.setHeader("Content-Disposition", "attachment; filename=123.png");

    ServletOutputStream outputStream = res.getOutputStream();
    outputStream.flush();

    outputStream.flush();
    int aRead = 0;
    byte b[] = new byte[1024];
    while ((aRead = in.read(b)) != -1 & in != null) {
        outputStream.write(b, 0, aRead);
    }
    outputStream.flush();
    in.close();
    outputStream.close();
    return "1";
}

11. SSM的整合

spring 和spring MVC 和Mybatis 的整合

1. 增加依赖

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>springSSM</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>springSSM Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <!-- SpringMVC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.0.11.RELEASE</version>
        </dependency>
        <!-- Spring JDBC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.11.RELEASE</version>
        </dependency>
        <!-- Spring AOP -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.0.11.RELEASE</version>
        </dependency>
        <!--aspect-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.0.11.RELEASE</version>
        </dependency>
        <!-- MySQL驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.6</version>
            <scope>provided</scope>
        </dependency>

        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>

        <!-- mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>

        <!--druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.20</version>
        </dependency>

        <!--jackjson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9.3</version>
        </dependency>

        <!--servlet-api-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>

        <!--<dependency>-->
        <!--  <groupId>com.alibaba</groupId>-->
        <!--  <artifactId>fastjson</artifactId>-->
        <!--  <version></version>-->
        <!--</dependency>-->

    </dependencies>

    <build>
        <finalName>springSSM</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

2. 配置web.xml

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>

    <!--spring 配置-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>


    <!--编码配置-->
    <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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!--spring MVC 配置-->
    <servlet>
        <servlet-name>spring</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>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

3. 配置spring 配置

<?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:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
 http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
">
<context:component-scan base-package="com.liyong.services"/>
    <!--配置链接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/book?serverTimezone=GMT"></property>
    </bean>

    <!--交给loc的工厂类-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--datasource-->
        <property name="dataSource" ref="dataSource"></property>
        <!--配置mapper路径-->
        <property name="mapperLocations" value="classpath:com/liyong/dao/*.xml"></property>
        <!--配置mybatis配置文件路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!--扫描自定义的mapper接口-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.liyong.dao"></property>
    </bean>

</beans>

4. 配置springmvc配置

<?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-3.0.xsd
 http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
 http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
    <!-- 启动注解驱动 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!-- 扫描业务代码 -->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

5. 配置mybatis配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!-- 打印SQL-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <typeAliases>
        <!-- 指定⼀个包名，MyBatis会在包名下搜索需要的JavaBean-->
        <package name="com.liyong.entity"/>
    </typeAliases>
</configuration>

6. 编写entity 接口和实现类

Spring MVC学习笔记和SSH的整合

7. 编写dao 接口类和mapper 文件

Spring MVC学习笔记和SSH的整合

8. 编写services接口和实现类

Spring MVC学习笔记和SSH的整合

9. 编写controller

Spring MVC学习笔记和SSH的整合

其他

解决响应乱码

在springmvc.xml 中添加如下代码。

  <!--处理响应乱码-->
  <mvc:annotation-driven>
    <!-- 消息转换器 -->
    <mvc:message-converters register-defaults="true">
      <bean
        class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes" value="text/html;charset=UTF8"></property>
      </bean>
    </mvc:message-converters>
  </mvc:annotation-driven>

RestApi

@RequestMapping("/rest/{id}/{name}")
public String restIndex(@PathVariable("id") Integer id, @PathVariable("name") String name) {
    System.out.println(id);
    System.out.println(name);
    return "index";
}

1. Spring MVC

2. 什么是MVC

3. SpringMVC的核心组件

4. Spring MVC 的工作流程。

5. 创建项目及入门程序

1. 配置web.xml 的servlet接收请求

6. Spring 注解

7. Spring MVC数据绑定

基本数据类型

包装类

List (content-type 为 x-www-urlencoded)

Map(content-type 为 x-www-urlencoded)

8. Response 响应和Request

9. REST 架构

其他

增加filter 解决请求中文乱码问题，在web.xml中添加 spring 自带的 filter 做encoding

10. 文件的上传和下载

文件上传

1. 增加依赖

2. springmvc.xml 中增加上传组件的配置

3. 接收文件上传

文件下载

11. SSM的整合

1. 增加依赖

2. 配置web.xml

3. 配置spring 配置

4. 配置springmvc配置

5. 配置mybatis配置

6. 编写entity 接口 和实现类

7. 编写dao 接口类 和mapper 文件

8. 编写services接口和实现类

9. 编写controller

其他

解决响应乱码

RestApi

6. 编写entity 接口和实现类

7. 编写dao 接口类和mapper 文件