Spring MVC學習筆記和SSH的整合

帥氣你勇哥發表於2020-10-24

SpringMVC筆記

1. Spring MVC

Spring MVC 是目前主流的實現MVC設計模式的企業級開發框架，Spring框架的一個子模組，無需整合，開發起來更加便捷。

2. 什麼是MVC

Controller
Model
View

3. SpringMVC的核心元件

DispatcherServler 前置控制器，相當於總排程。
Handler 處理器，相當於Servler或Action。
HandlerMapping 相當於路由交換。
handlerIntercepetor 處理器攔截器。
HandlerExecutionChain 處理器執行鏈。
HandlerAdapter 處理介面卡
ModelAndView裝載了模型資料和檢視資訊。
ViewResouler 檢視解析器。

4. Spring MVC 的工作流程。

客戶端請求被DispatcherServlet 接收

根據HandlerMapping 對映到 Handler。

生成Handler 和HandlerInterceptor。

Handler 和HandletInterceptor 。。

5. 建立專案及入門程式

1. 配置web.xml 的servlet接收請求

<!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 配置檔案

<?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">


<!--開啟註解掃描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置檢視解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--字首/index的/-->
        <property name="prefix" value="/"></property>
        <!--字尾 /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;

// 註冊為handler
@Controller
@RequestMapping("/hello")
public class HelloController {

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

6. Spring 註解

@Controller 在類定義處新增，結合spring 的loc自動掃描使用。
@RequestMapping 該註解將url請求和業務方法進行對映，在類和方法前都可以新增。

- value 指定url 的實際地址，也是requestMapping的預設值
- method 指定請求的method 型別。
- params 指定請求中必須包含某些引數，否則無法訪問

@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;
}

// 接收物件。
// 預設接收中文 會亂碼，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 獲取cookie 值

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

@RequestParam("name") 註解在形參上，代表當前形參和params 對應。

- requried 是否必傳
- value 引數名代表引數key
- defaultValue 預設值

@RequestBody 代表這個請求是返回響應物件而非檢視解析器
@PathVariable 表示獲取路徑引數
@RestController 表示處理器會把返回資料直接返回給客戶端，不經過檢視響應，註解在類上。
@RequestBody 打在引數上，獲取json資料
@GetMpapping 表示get請求
@PostMapping 表示post請求
@PutMapping 表示put 請求
@DeleteMapping 表示delete 請求

7. Spring MVC資料繫結

資料繫結：在後端業務方法中直接獲取客戶端HTTP請求中的引數，將請求引數對映到業務方法的形參中，springMVC 的資料繫結是由HandlerAdaptter 來完成的。

基本資料型別

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

包裝類

包裝類可以接受null。

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

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

增加entity 類，必須具備構造方法和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 + '\'' +
      '}';
  }
}

增加方法入參

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

Map(content-type 為 x-www-urlencoded)

封裝mapentity類

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 +
                '}';
    }
}

編寫handler處理邏輯

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

JSON：java預設無法直接把json 轉換為 java物件

安裝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">


    <!--開啟註解掃描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置檢視解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--字首/index的/-->
        <property name="prefix" value="/"></property>
        <!--字尾 /index.jsp 的jsp-->
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--處理響應亂碼-->
    <mvc:annotation-driven>
        <!-- 訊息轉換器 轉換響應格式 為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 響應和Request

安裝servlet

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

設定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";
  }

9. REST 架構

get 獲取資源
post 新增資源
put 修改資源
delete 刪除資源

其他

增加filter 解決請求中文亂碼問題，在web.xml中新增 spring 自帶的 filter 做encoding

  <!--配置編碼過濾器-->
  <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 增刪查改

編寫DAO和實現類

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, "憨憨劉"));
    }

    @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";
    }
}

編寫services 和實現類

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);
    }
}

編寫處理器

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. 檔案的上傳和下載

檔案上傳

底層採用 apache fileupload

1. 增加依賴

<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 中增加上傳元件的配置

<?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">


    <!--開啟註解掃描-->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!--配置檢視解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--字首/index的/-->
        <property name="prefix" value="/"></property>
        <!--字尾 /index.jsp 的jsp-->
        <property name="suffix" value=".jsp"></property>
    </bean>

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

    <!--處理響應亂碼-->
    <mvc:annotation-driven>
        <!-- 訊息轉換器 轉換響應格式 為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. 接收檔案上傳

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";
        }
        // 獲取servlet context 下的file 檔案路徑
        String servletPath = req.getSession().getServletContext().getRealPath("file");
        // 獲取檔名
        String name = file.getOriginalFilename();

        // 新建檔案
        File file1 = new File(servletPath, name);
        // 寫入到檔案
        file.transferTo(file1);

        return "success";
    }

}

檔案下載

@RequestMapping("/download")
public String download(HttpServletRequest req, HttpServletResponse res) throws IOException {
    String path = req.getSession().getServletContext().getRealPath("file");
    FileInputStream in = new FileInputStream(path + "\\QQ瀏覽器截圖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. 增加依賴

<?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驅動 -->
        <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>


    <!--編碼配置-->
    <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"/>
    <!--配置連結池-->
    <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>

    <!--交給loc的工廠類-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--datasource-->
        <property name="dataSource" ref="dataSource"></property>
        <!--配置mapper路徑-->
        <property name="mapperLocations" value="classpath:com/liyong/dao/*.xml"></property>
        <!--配置mybatis配置檔案路徑-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!--掃描自定義的mapper介面-->
    <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">
    <!-- 啟動註解驅動 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!-- 掃描業務程式碼 -->
    <context:component-scan base-package="com.liyong"></context:component-scan>

    <!-- 配置檢視解析器 -->
    <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>
        <!-- 列印SQL-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <typeAliases>
        <!-- 指定⼀個包名，MyBatis會在包名下搜尋需要的JavaBean-->
        <package name="com.liyong.entity"/>
    </typeAliases>
</configuration>

6. 編寫entity 介面和實現類

7. 編寫dao 介面類和mapper 檔案

8. 編寫services介面和實現類

9. 編寫controller

其他

解決響應亂碼

在springmvc.xml 中新增如下程式碼。

  <!--處理響應亂碼-->
  <mvc:annotation-driven>
    <!-- 訊息轉換器 -->
    <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";
}

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Spring MVC學習筆記和SSH的整合

1. Spring MVC

2. 什麼是MVC

3. SpringMVC的核心元件

4. Spring MVC 的工作流程。

5. 建立專案及入門程式

1. 配置web.xml 的servlet接收請求

6. Spring 註解

7. Spring MVC資料繫結

基本資料型別

包裝類

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

Map(content-type 為 x-www-urlencoded)

8. Response 響應和Request

9. REST 架構

其他

增加filter 解決請求中文亂碼問題，在web.xml中新增 spring 自帶的 filter 做encoding

10. 檔案的上傳和下載

檔案上傳

1. 增加依賴

2. springmvc.xml 中增加上傳元件的配置

3. 接收檔案上傳

檔案下載

11. SSM的整合

1. 增加依賴

2. 配置web.xml

3. 配置spring 配置

4. 配置springmvc配置

5. 配置mybatis配置

6. 編寫entity 介面 和實現類

7. 編寫dao 介面類 和mapper 檔案

8. 編寫services介面和實現類

9. 編寫controller

其他

解決響應亂碼

RestApi

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