SSM:Spring+SpringMVC+MyBatis整理(一)
阿新 • • 發佈：2018-11-01
1、專案建立目錄：
2、pom.xml:
<?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 目前只整理了SpringMVC以及Spring自動注入。
涉及檔案：
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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 自動掃描該包，使SpringMVC認為包下用了@Controller註解的類是控制器 -->
<context:component-scan base-package="com.vege.controller" />
<mvc:default-servlet-handler />
<mvc:annotation-driven />
<!-- 定義跳轉的檔案的前後綴 ，檢視模式配置-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- controller最後返回的值xx，則頁面即是webapp/jsp/xx.jsp -->
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>自動注入重點：
<context:component-scan base-package="com.vege" />web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>Archetype Created Web Application</display-name>
<!-- Spring整合mybatis所使用的配置檔案 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<!-- 編碼過濾器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<async-supported>true</async-supported>
<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>
<!-- Spring監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 防止Spring記憶體溢位監聽器 -->
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<!-- Spring MVC servlet -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>java程式碼部分
由底層開始一個個寫
1、model：UserDto.java
package com.vege.model;
public class UserDto {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username == null ? null : username.trim();
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password == null ? null : password.trim();
}
}2、Dao:UserDao.java IUserDao.java
package com.vege.dao;
import com.vege.model.UserDto;
public interface IUserDao {
int insert(UserDto record);
}package com.vege.dao;
/**
* Created by 59258 on 2017/12/29.
*/
import com.vege.model.UserDto;
import org.springframework.stereotype.Repository;
@Repository
public class UserDao implements IUserDao {
public String yes() {
System.out.println("hahaha");
return "yes+";
}
@Override
public int insert(UserDto record) {
System.out.println("hahahage");
return 0;
}
}
3、Services：UserSerVice.java UserSerViceImpl.java
package com.vege.service;
import com.vege.model.UserDto;
/**
* Created by 59258 on 2017/12/28.
*/
public interface UserService {
public int insert(UserDto userDto);
}
package com.vege.service;
import javax.annotation.Resource;
import com.vege.dao.IUserDao;
import com.vege.model.UserDto;
import org.springframework.stereotype.Service;
import com.vege.dao.UserDao;
@Service
public class UserServiceImpl implements UserService {
@Resource(name = "userDao")
private IUserDao iUserDao;
public void setUserDao(UserDao userDao) {
this.iUserDao = userDao;
}
@Override
public int insert(UserDto userDto) {
System.out.println("hahaha");
iUserDao.insert(userDto);
return 0;
}
}
4、controller :UserController.java
package com.vege.controller;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import com.vege.model.UserDto;
import com.vege.service.UserService;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.stereotype.Controller;
@Controller
@RequestMapping("/user")
public class UserController {
public void setUserService(UserService userService) {
this.userService = userService;
}
@Resource(name = "userServiceImpl")
private UserService userService;
@RequestMapping("/showUser")
public String toIndex(HttpServletRequest request,Model model){
UserDto userDto= new UserDto();
userDto.setUsername("測試");
this.userService.insert(userDto);
model.addAttribute("user", userDto);
System.out.println("hihi");
return "showUser";
}
}啟動服務：訪問地址，http://localhost:8080/專案名/user/showUser
由於本人tomcat設定問題：http://localhost/user/showUser即可訪問了。
說一下上面出現的一些註解
@RequestMapping(“/user”)：請求對應
@RequestMapping(“/showUser”)：請求對應
@Resource(name = “userServiceImpl”)：這裡也可以用@AutoWired，都是用來裝配bean，可以寫在屬性或者setter方法上。推薦使用Resource，可以靈活採用name以及type裝配bean。
@Controller：涉及配置controller，即配置檔案spring-mvc.xml中：<context:component-scan base-package="com.vege.controller" />,同時也是自動注入中控制層的意思，即為bean的controller層。
@Service：自動注入bean中service層的意思。
@Repository：自動注入bean中dao層的意思。
jsp
showUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hello World</title>
</head>
<body>
HIHI
${user.userName}
</body>
</html> 啟動服務：訪問地址，http://localhost:8080/專案名/user/showUser
由於本人tomcat設定問題：http://localhost/user/showUser即可訪問了。
OK。
之後整理了mybatis後會繼續寫第二章。