忙活了大半天,飯也沒顧得上吃,哎許久不動手,一動手就出事,下面請看今天的重頭戲,額吃個飯回來再發了!
1.整體結構
2.準備工作
數據庫:
--Mysql 5.6
創建數據庫 wolf
CREATE DATABASE wolf;
創建用戶表 user
create table user( id int AUTO_INCREMENT primary key, name varchar(25) not null, pwd varchar(20) not null, create_time date )
向表中插入測試數據
insert into user(name,pwd,create_time) values("wangxin","123","2014-02-14"); insert into user(name,pwd,create_time) values("Tom","123456","2014-02-14"); insert into user(name,pwd,create_time) values("Jack","123","2014-02-14"); insert into user(name,pwd,create_time) values("Bob","123","2014-02-14");
所需Jar包
我們先文字,後圖吧,細心的你,看完所有內容會發現,這裏的東西在哪裏也有哦,別想多了,肯定在這裏,你猜猜猜..
jar:
1.驅動:mysql-connector-java-5.1.7-bin.jar
2.jstl 的
jstl.jar
standard.jar
3.spring 的
spring-aop-4.0.0.M2.jar
spring-beans-4.0.0.M2.jar
spring-context-4.0.0.M2.jar
spring-core-4.0.0.M2.jar
(若出現問題,可以替換 spring-core-4.0.0.RELEASE.jar)
spring-expression-4.0.0.M2.jar
spring-jdbc-4.0.0.M2.jar
spring-test-4.0.0.M2.jar
spring-tx-4.0.0.M2.jar
4.mybatis 的
mybatis-3.1.1.jar
log4j-1.2.16.jar
mybatis-spring-1.2.1.jar
5.以及spring-depend
aopalliance-1.0.jar
cglib-nodep-2.1_3.jar
commons-logging-1.1.1.jar
6.web 相關的
spring-web-4.0.0.RELEASE.jar
spring-webmvc-4.0.0.RELEASE.jar
下面是jar包在項目中的結構圖
3.項目代碼及簡析
Bean類
User.java
package com.springmvc_mybatis.bean; import java.io.Serializable; import java.util.Date; import org.springframework.format.annotation.DateTimeFormat; public class User implements Serializable { private static final long serialVersionUID = 1L; private Integer id; private String name; private String password; @DateTimeFormat(pattern = "yyyy-MM-dd") private Date time; public User() { super(); } public User(String name, String password) { super(); this.name = name; this.password = password; } public User(Integer id, String name, String password, Date time) { super(); this.id = id; this.name = name; this.password = password; this.time = time; } 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; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Date getTime() { return time; } public void setTime(Date time) { this.time = time; } @Override public String toString() { return "User [id=" + id + ", name=" + name + ", password=" + password + ", time=" + time + "]"; } }
接口(如果你用了mappers 那麼接口以及配置文件最後都帶有Mapper,且名字一致)
UserMapper.java
package com.springmvc_mybatis.mapper; import java.util.List; import org.apache.ibatis.annotations.Param; import com.springmvc_mybatis.bean.User; //userMapper只能傳入一個參數,多個的話需要註解 public interface UserMapper { // value 必須與Bean 屬性一致! User login(@Param(value = "name") String name, @Param(value = "password") String password); List<User> getAllUsers(); }
UserMapper.xml
<?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.springmvc_mybatis.mapper.UserMapper"> <resultMap type="User" id="userResult"> <result column="id" property="id" /> <result column="name" property="name" /> <result column="pwd" property="password" /> <result column="create_time" property="time" /> </resultMap> <select id="login" resultMap="userResult"> select * from user where name=#{name} and pwd=#{password} </select> <select id="getAllUsers" resultMap="userResult"> select * from user </select> </mapper> <!-- error ,,,,resultMap wrong to resultType... -->
下面該幹嘛了?╮(╯▽╰)╭好吧,我們先來配置下在木有服務器的環境下,看看Mybatis是否能正確運行。
所以我們先來配置哪個呢?
哦是她,
spring 配置
beans_wolf.xml 哈哈,wolf 哦,夠那個啥吧。。。
<?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:tx="http://www.springframework.org/schema/tx" 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-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"> <!-- 1. 數據源 : DriverManagerDataSource --> <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3307/wolf"/> <property name="username" value="root"/> <property name="password" value="root"/> </bean> <!-- 2. mybatis的SqlSession的工廠: SqlSessionFactoryBean dataSource / typeAliasesPackage --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="datasource"/> <property name="typeAliasesPackage" value="com.springmvc_mybatis.bean"/> <property name="configLocation" value="classpath:mybatis-config.xml" /> </bean> <!-- 3. mybatis自動掃描加載Sql映射文件 : MapperScannerConfigurer sqlSessionFactory / basePackage --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.springmvc_mybatis.mapper"/> <property name="sqlSessionFactory" ref="sqlSessionFactory"/> </bean> <!-- 4. 事務管理 : DataSourceTransactionManager --> <bean id="manager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="datasource"/> </bean> <!-- 5. 使用聲明式事務 --> <tx:annotation-driven transaction-manager="manager" /> </beans>
Spring 基本配置都在上面咯,數據庫如果想讀入配置文件的話,自己新建屬性文件配置下下了
哦,差點過了,現在我們就可以來測試下咯,後面的mvc配置主要是爲web服務的哈,不急!!
TestSimpleMyBatis.java
package com.springmvc_mybatis.test; import java.util.List; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4Cla***unner; import com.springmvc_mybatis.bean.User; import com.springmvc_mybatis.mapper.UserMapper; @RunWith(SpringJUnit4Cla***unner.class) @ContextConfiguration("/beans_wolf.xml") public class TestSimpleMyBatis { @Autowired private UserMapper userMapper; @Test public void findAll() { List<User> users = userMapper.getAllUsers(); System.out.println(users); } @Test public void login() { // User user = new User(null, "wx", "123456", new Date()); // User user = new User(null, "wangxin", "123456", new Date()); // User loginExit = userMapper.login(user); // User loginExit = userMapper.login("wx", "123456"); User loginExit = userMapper.login("wangxin", "123456"); if (loginExit == null) { System.out.println("用戶不存在"); } else { System.out.println(loginExit); System.out.println("登錄成功!"); } } }
如果你成功了,恭喜你可以繼續咯!如果出現問題那麼嘗試在配置一個哈,
mybatis-config.xml,特意把她放到下下個咯,就看你細心嘛
Let`s go...
applicationContext-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: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"> <!-- Scans the classpath of this application for @Components to deploy as beans --> <context:component-scan base-package="com.springmvc_mybatis.controller" /> <!-- Configures the @Controller programming model --> <mvc:annotation-driven /> <!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/test/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
mybatis-config.xml
<?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> <!-- Spring整合myBatis後,這個配置文件基本可以不要了 --> <!-- 設置外部配置文件 --> <!-- 設置類別名 --> <typeAliases> <typeAlias type="com.springmvc_mybatis.bean.User" alias="User" /> </typeAliases> <!-- 設置數據庫連接環境 --> <!-- 映射文件 --> <mappers> <mapper resource="com/springmvc_mybatis/mapper/userMapper.xml" /> </mappers> </configuration>
到此配置工作基本完成了,爲了頁面數據提交和查找,再弄個Handler吧,這個也可以叫做Controller吧,反正都是流程數據處理的哈
UserController.java
package com.springmvc_mybatis.controller; import java.util.List; import javax.servlet.http.HttpServletRequest; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.springmvc_mybatis.bean.User; import com.springmvc_mybatis.mapper.UserMapper; @Controller @RequestMapping("/user") public class UserController { @Autowired private UserMapper usermapper; @RequestMapping("/login") public String login(HttpServletRequest request, Model model) { String name = request.getParameter("username"); String password = request.getParameter("password"); System.out.println("login"); User user_login = usermapper.login(name, password); System.out.println(user_login); if (user_login == null) { System.out.println("Error login!"); return "fail"; } else { model.addAttribute("user", user_login); return "success"; } } @RequestMapping("/list") public String getAllUsers(Model model) { List<User> users = usermapper.getAllUsers(); model.addAttribute("users", users); System.out.println(users); return "list"; } }
下面我們該弄什麼咯???
前端顯示了,當然是。
先給出結構圖吧,挺簡單的!
神啊,你未來來的吧,我還在5,啊,6啊,7都少用,你都,,,,,
WEB
index.jsp
<jsp:forward page="/WEB-INF/test/login.jsp"></jsp:forward>
login.jsp
<%@ 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>login</title> </head> <body> <form action="user/login.action" method="post"> <table align="left"> <tr> <td>用戶名:</td> <td><input id="userName" type="text" name="username"></td> </tr> <tr> <td>密碼:</td> <td><input id="password" type="password" name="password"></td> </tr> <tr> <td><button type="submit" name="Submit">登錄</button></td> </tr> </table> </form> </body> </html>
success.jsp 登錄成功
<%@ 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>Success</title> </head> <body> Welcome <font color="red">${requestScope.user.name} </font>! <br> <br> <a href="list.action">用戶信息列表</a> </body> </html>
fail.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <h3> <font color="red">fail login!</font> </h3> <h2> <a href="${pageContext.request.contextPath}">return the Login Page!</a> </h2> </body> </html>
list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%> <%@taglib prefix="spring" uri="http://www.springframework.org/tags"%> <!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>Insert title here</title> </head> <body> <c:if test="${empty requestScope.users }"> <font color="red">沒有員工信息!</font> </c:if> <c:if test="${!(empty requestScope.users)}"> <table border="1" cellpadding="10" cellspacing="0"> <tr> <th>Num</th> <th>Id</th> <th>Name</th> <th>Create_Time</th> <th>Password</th> <th colspan="2">OP</th> </tr> <c:forEach items="${requestScope.users }" var="user" varStatus="s"> <tr> <td>${s.count}</td> <td>${user.id}</td> <td>${user.name }</td> <td><fmt:formatDate value="${user.time}" pattern="yyyy-MM-dd" /> </td> <td>${user.password}</td> <td><a onclick="return false" href="${pageContext.request.contextPath}/user/save.action?id=${user.id}"><font color="blue">edit</font></a></td> <td><a onclick="return false" href="${pageContext.request.contextPath}/user/delete/${user.id}.action"><font color="blue">delete</font></a></td> </tr> </c:forEach> </table> </c:if> <br> <a href="${pageContext.request.contextPath}">goto login</a> </body> </html>
頁面終於完蛋了,,但是能運行嗎????????
好像少了個吧
web.xml
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>Demo_SpringMVC_MyBatis</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:beans_wolf.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> </web-app>
4.其他
下面簡單說下項目中的xml文件哦
XML文件
1.Spring基本的ApplicationContext.xml 本例中用的是 beans_wolf.xml(名字一定要注意,儘量用前面的) 配置了: <!-- 1. 數據源 : DriverManagerDataSource --> <!-- 2. mybatis的SqlSession的工廠: SqlSessionFactoryBean dataSource / typeAliasesPackage --> <!-- 3. mybatis自動掃描加載Sql映射文件 : MapperScannerConfigurer sqlSessionFactory / basePackage /configLocation--> <!-- 4. 事務管理 : DataSourceTransactionManager --> <!-- 5. 使用聲明式事務 --> 其中配置了數據庫的具體信息,所以不在另外用屬性文件了! 2.Spring MVC 的applicationContext-mvc.xml 配置了:自動掃描包,註解驅動,視圖解析器 3.mybatis-config.xml 這個具體配置根據你的實際來弄! 4.web.xml 配置了: <!-- needed for ContextLoaderListener --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:beans_wolf.xml</param-value> </context-param> <!-- Bootstraps the root web application context before servlet initialization --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- DispatcherServlet--> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <init-param> <!-- 配置 SpringMVC 配置文件的位置 --> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <!-- 配置什麼樣的請求交由 SpringMVC 處理 --> <url-pattern>*.action</url-pattern> </servlet-mapping>
遇到的一個很不咋地的問題
HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalArgumentException:
Mapped Statements collection does not contain value for com.springmvc_mybatis.mapper.UserMapper.login
!!!少了這個<property name="configLocation" value="classpath:mybatis-config.xml" />
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="datasource"/> <property name="typeAliasesPackage" value="com.springmvc_mybatis.bean"/> <property name="configLocation" value="classpath:mybatis-config.xml" /> </bean>
網友的一些問題及解決方法。。。
Mapped Statements collection does not contain value for後面是什麼類什麼方法之類的: 錯誤原因有幾種: 1、mapper.xml中沒有加入namespace !!!! 2、mapper.xml中的方法和接口mapper的方法不對應 !!! 3、mapper.xml沒有加入到mybatis-config.xml中(即總的配置文件),例外:配置了mapper文件的包路徑的除外 !!! 4、mapper.xml文件名和所寫的mapper名稱不相同。 !! 5.java文件和xml文件的名稱不一致 ! 6.可能是你的controller 或者說是handler 有問題!!
另外:jsp 文件的位置要特別注意! index,一般在WebContent下!!!
那個xml文件出現問題一般是你的dtd約束,taglib等沒弄好,自己細細品味下嘛,不知道度娘娘,實在不行在一起討論哦!
5.完整Demo項目下載地址
Demo_SpringMVC_MyBatis 完整登錄及list查詢,無錯誤,幾經驗證!共同學習! |
SpringMVC MyBatis 相關jar包下載 |
如果無法下載,請留言索取,因爲上傳可能出現問題!
水平不咋地,就愛瞎折騰,歡迎大家一起折騰( ⊙ o ⊙ )啊!
有問題,請留言!
提供源碼其它下載方式:SpringMVC3,4+Mybatis3.1+Mysql