Spring MVC學習筆記和SSH的整合
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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