使用maven搭建SSM專案(spring+springmvc+Mybatis)
阿新 • • 發佈:2018-12-26
本文介紹使用eclipse+maven搭建Spring+SpringMvc+Mybatis專案,以登陸為例:
1、建立maven專案
2、把maven專案變為動態網站
3、搭建spring+springmvc+Mybatis專案
1 建立maven專案
2 把maven專案變為動態網站
3 開始搭建spring+springmvc+Mybatis專案
3.1 配置maven依賴,在pom.xml寫入如下:
<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>com.welljoint</groupId>
<artifactId>testSSM2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>4.0.5.RELEASE</spring.version>
<mybatis.version> 3.2.1</mybatis.version>
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<mysql.version>5.1.35</mysql.version>
</properties>
<dependencies>
<!-- 新增Spring依賴 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!--spring單元測試依賴 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<!-- spring webmvc相關jar -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- mysql驅動包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- alibaba data source 相關jar包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>0.2.23</version>
</dependency>
<!-- alibaba fastjson 格式化對 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
<!-- logback start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.logback-extensions</groupId>
<artifactId>logback-ext-spring</artifactId>
<version>0.1.1</version>
</dependency>
<!--mybatis依賴 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- mybatis/spring包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.0</version>
</dependency>
<!-- 新增servlet3.0核心包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.2-b01</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--單元測試依賴 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- 引入資料庫連線池 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.6</version>
</dependency>
</dependencies>
</project>
3.2 請檢查maven依賴是否匯入到專案中了
(可以不用檢查,如何報錯了再來看)
- 請點選檢視:http://blog.csdn.net/tiandixuanwuliang/article/details/79250504#t4
3.3 在src/main/java中新建一個com.welljoint.entity的包;在這個包裡新建一個User.java的bean
package com.welljoint.entity;
/**
* @version
* @describe:使用者的bean
*/
public class User {
private Integer id;
private String userName;
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "User [id=" + id + ", userName=" + userName + ", password="
+ password + "]";
}
}
3.4 在WEB-INF目錄下建立一個view資料夾;在該資料夾裡建立一個login.jsp,程式碼如下:
<%@ page language="java" contentType="text/html; charset=UTF-8"
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>登陸</title>
</head>
<body>
<form method="post">
使用者名稱:<input type="text" name="userName"><br>
密碼:<input type="text" name="password"><br>
<input type="submit" value="登陸">
</form>
</body>
</html>
- 再在view資料夾下建立一個login_success.jsp的頁面,程式碼如下:
<%@ page language="java" contentType="text/html; charset=UTF-8"
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>登陸成功</title>
</head>
<body>
登陸成功
</body>
</html>
3.5 在src/main/java中新建一個com.welljoint.rest的包;在這個包裡新建一個LoginController.java作為控制器
package com.welljoint.rest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.welljoint.entity.User;
/**
* @version
* @describe:控制器
*/
@Controller //註解為控制器
@RequestMapping(value="/login") //截獲帶有/login的請求
public class LoginController {
@RequestMapping(method=RequestMethod.GET)
public String get(){ //用來返回一個頁面
return "login"; //返回指向login.jsp頁面
}
@RequestMapping(method=RequestMethod.POST)
public String post(User user){ //用來處理使用者的登陸請求
return "login_success";
}
}
3.6 在src/main/resources中新建一個spring-mvc.xml的檔案,程式碼如下:
<?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-3.0.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-3.0.xsd">
<!-- 對web包中的所有類進行掃描,以完成Bean建立和自動依賴注入的功能 -->
<context:component-scan base-package="com.welljoint" />
<!-- 啟用基於註解的配置 @RequestMapping, @ExceptionHandler,資料繫結 ,@NumberFormat ,
@DateTimeFormat ,@Controller ,@Valid ,@RequestBody ,@ResponseBody等 -->
<mvc:annotation-driven />
<!-- 檢視層配置 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--配置JSTL表示式-->
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<!-- 字首 -->
<property name="prefix" value="/WEB-INF/view/"/>
<!-- 字尾 -->
<property name="suffix" value=".jsp"/>
</bean>
<!-- 配置靜態資源 -->
<mvc:resources location="/res/" mapping="/res/**"/>
</beans>
3.7 配置web.xml,程式碼如下:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>testSSM2</display-name>
<!-- 請求都交給DispatcherServlet處理 -->
<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>
<!-- 增加中文亂碼過濾器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 清除jsp空格 -->
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<trim-directive-whitespaces>true</trim-directive-whitespaces>
</jsp-property-group>
</jsp-config>
</web-app>
- 如果你是按照上述一步步做的話,已經可以執行看效果了,效果圖如下:
- 任意輸入點選登陸後,如下圖:
3.8 寫service層:在src/main/java中新建一個com.welljoint.service的包;在這個包裡新建一個LoginService.java作為服務層的介面
package com.welljoint.service;
public interface LoginService {
public int login(String userName,String password);
}
- 再在com.welljoint.service包中新建一個LoginServiceImpl.java作為服務層介面的實現
package com.welljoint.service;
import org.springframework.stereotype.Service;
@Service
public class LoginServiceImpl implements LoginService{
public int login(String userName,String password){
return 1;
}
}
- 此時就可以把service層注入到controller層來發揮作用了,把LoginController.java修改為如下:
package com.welljoint.rest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.welljoint.entity.User;
import com.welljoint.service.LoginService;
/**
* @version
* @time 2018-3-8 下午4:17:37
* @describe:控制器
*/
@Controller //註解為控制器
@RequestMapping(value="/login") //截獲帶有/login的請求
public class LoginController {
@Autowired
LoginService loginService; //注入service層
@RequestMapping(method=RequestMethod.GET)
public String get(){ //用來返回一個頁面
return "login"; //返回指向login.jsp頁面
}
@RequestMapping(method=RequestMethod.POST)
public String post(User user){ //用來處理使用者的登陸請求
if (loginService.login(user.getUserName(), user.getPassword())==1) {
return "login_success"; //登陸成功,跳轉到login_success.jsp頁面
}
return "login";
}
}
- 把專案執行起來,如果效果和之前的一樣,輸入任意值,點選登陸可以跳轉,則證明service層寫正確了,如下:
3.9寫dao層:在src/main/java中新建一個com.welljoint.dao的包;在這個包裡新建一個UserDao.java作為資料層的介面
package com.welljoint.dao;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;
import com.welljoint.entity.User;
/**
*
* @author Administrator
* dao層
*/
@Repository
public interface UserDao {
User selectUser(@Param("userName")String userName,@Param("password")String password);
}
- 此時就可以把dao層注入到service層來,把LoginServiceImpl.java修改為如下:
package com.welljoint.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.welljoint.dao.UserDao;
@Service
public class LoginServiceImpl implements LoginService{
@Autowired
UserDao userDao;
@Override
public int login(String userName,String password){
User user = userDao.selectUser(userName,password);
return user==null?0:1;
}
}
- 此時執行專案再用瀏覽器訪問時會報錯,因為我們的dao是沒有實現類的,在Mybatis中是通過配置檔案來配置的,錯誤資訊如下。但是有一個好訊息,我們的java程式碼已經都寫完了,剩下的事情:
3.10 把Mybatis加入到專案中,並且去資料庫查詢資料
對於這一節,是難點,<敲黑板>,3.9節前做的是前奏,都沒有涉及到資料庫操作,關於3.10節,大家可以用Hibernate也可以用Mybatis,這一章我們講Mybatis,我的另一篇文章講Hibernate,也歡迎大家看。
(1)使用mysql,在本地建立一個名為ssm的資料庫(手動建立一個user表)
- 資料字典如下
id userName password integer varchar(10) varchar(10) ID 使用者名稱 密碼 - 資料庫如下:
- (2)在src/main/resources中建立名為Mapper的資料夾,在這個資料夾裡建立UserMapper.xml的檔案
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.welljoint.dao.UserDao" >
<select id="selectUser" resultType="com.welljoint.entity.User" >
SELECT
*
FROM
user u
WHERE
u.userName = #{userName} AND u.password = #{password}
</select>
</mapper>
- (3)在src/main/resources中建立spring.xml檔案,程式碼如下:
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
">
<!-- 1.配置jdbc檔案 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath:conf.properties"/>
</bean>
<!-- 2.掃描的包路徑,這裡不掃描被@Controller註解的類 --><!--使用<context:component-scan/> 可以不在配置<context:annotation-config/> -->
<context:component-scan base-package="com.welljoint">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<import resource="classpath:spring-mybatis.xml" />
</beans>
- (4)把spring.xml配置檔案,加入到web.xml中,web.xml程式碼修改為如下(請關注本檔案中新新增的兩部分程式碼):
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>testSSM2</display-name>
<!-- 讀取spring配置檔案 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<!-- Spring字符集過濾器 -->
<filter>
<filter-name>SpringEncodingFilter</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>SpringEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 新增日誌監聽器 -->
<context-param>
<param-name>logbackConfigLocation</param-name>
<param-value>classpath:logback.xml</param-value>
</context-param>
<listener>
<listener-class>ch.qos.logback.ext.spring.web.LogbackConfigListener</listener-class>
</listener>
<!-- 上下文監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 請求都交給DispatcherServlet處理 -->
<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>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 清除jsp空格 -->
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp