忙活了大半天,饭也没顾得上吃,哎许久不动手,一动手就出事,下面请看今天的重头戏,额吃个饭回来再发了!
1.整体结构
2.准备工作
数据库:
--Mysql 5.6
创建数据库 wolf
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CREATE DATABASE wolf;
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创建用户表 user
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create table user (
id int AUTO_INCREMENT primary key ,
name varchar (25) not null ,
pwd varchar (20) not null ,
create_time date
) |
向表中插入测试数据
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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
我们先文字,后图吧,细心的你,看完所有内容会发现,这里的东西在哪里也有哦,别想多了,肯定在这里,你猜猜猜..
jar:
1.驱动: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
(若出现问题,可以替换 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 相关的
spring-web-4.0.0.RELEASE.jar
spring-webmvc-4.0.0.RELEASE.jar
下面是jar包在项目中的结构图
3.项目代码及简析
Bean类
User.java
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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 那么接口以及配置文件最后都带有Mapper,且名字一致)
UserMapper.java
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package com.springmvc_mybatis.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Param;
import com.springmvc_mybatis.bean.User;
//userMapper只能传入一个参数,多个的话需要注解 public interface UserMapper {
// value 必须与Bean 属性一致!
User login( @Param (value = "name" ) String name,
@Param (value = "password" ) String password);
List<User> getAllUsers();
} |
UserMapper.xml
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<? 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... --> |
下面该干嘛了?╮(╯▽╰)╭好吧,我们先来配置下在木有服务器的环境下,看看Mybatis是否能正确运行。
所以我们先来配置哪个呢?
哦是她,
spring 配置
beans_wolf.xml 哈哈,wolf 哦,够那个啥吧。。。
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<? 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. 数据源 : 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的工厂: 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自动扫描加载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. 事务管理 : DataSourceTransactionManager -->
< bean id = "manager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" >
< property name = "dataSource" ref = "datasource" />
</ bean >
<!-- 5. 使用声明式事务 -->
< tx:annotation-driven transaction-manager = "manager" />
</ beans >
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Spring 基本配置都在上面咯,数据库如果想读入配置文件的话,自己新建属性文件配置下下了
哦,差点过了,现在我们就可以来测试下咯,后面的mvc配置主要是为web服务的哈,不急!!
TestSimpleMyBatis.java
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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.SpringJUnit4ClassRunner;
import com.springmvc_mybatis.bean.User;
import com.springmvc_mybatis.mapper.UserMapper;
@RunWith (SpringJUnit4ClassRunner. 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( "用户不存在" );
} else {
System.out.println(loginExit);
System.out.println( "登录成功!" );
}
}
} |
如果你成功了,恭喜你可以继续咯!如果出现问题那么尝试在配置一个哈,
mybatis-config.xml,特意把她放到下下个咯,就看你细心嘛
Let`s go...
applicationContext-mvc.xml
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<? 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 >
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mybatis-config.xml
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<? 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后,这个配置文件基本可以不要了 -->
<!-- 设置外部配置文件 -->
<!-- 设置类别名 -->
< typeAliases >
< typeAlias type = "com.springmvc_mybatis.bean.User" alias = "User" />
</ typeAliases >
<!-- 设置数据库连接环境 -->
<!-- 映射文件 -->
< mappers >
< mapper resource = "com/springmvc_mybatis/mapper/userMapper.xml" />
</ mappers >
</ configuration >
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到此配置工作基本完成了,为了页面数据提交和查找,再弄个Handler吧,这个也可以叫做Controller吧,反正都是流程数据处理的哈
UserController.java
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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" ;
}
} |
下面我们该弄什么咯???
前端显示了,当然是。
先给出结构图吧,挺简单的!
神啊,你未来来的吧,我还在5,啊,6啊,7都少用,你都,,,,,
WEB
index.jsp
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<jsp:forward page= "/WEB-INF/test/login.jsp" ></jsp:forward>
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login.jsp
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<%@ 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>用户名:</td>
<td><input id= "userName" type= "text" name= "username" ></td>
</tr>
<tr>
<td>密码:</td>
<td><input id= "password" type= "password" name= "password" ></td>
</tr>
<tr>
<td><button type= "submit" name= "Submit" >登录</button></td>
</tr>
</table>
</form>
</body> </html> |
success.jsp 登录成功
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<%@ 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" >${requestScope.user.name} </font>!
<br>
<br>
<a href= "list.action" >用户信息列表</a>
</body> </html> |
fail.jsp
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<%@ page language= "java" contentType= "text/html; charset=UTF-8"
pageEncoding= "UTF-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html> <head> <meta http-equiv= "Content-Type" content= "text/html; charset=UTF-8" >
<title>Insert title here</title> </head> <body> <h3>
<font color= "red" >fail login!</font>
</h3>
<h2>
<a href= "${pageContext.request.contextPath}" > return the Login
Page!</a>
</h2>
</body> </html> |
list.jsp
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<%@ 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= "${empty requestScope.users }" >
<font color= "red" >没有员工信息!</font>
</c: if >
<c: if test= "${!(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> |
页面终于完蛋了,,但是能运行吗????????
好像少了个吧
web.xml
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<? 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 >
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4.其他
下面简单说下项目中的xml文件哦
XML文件
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1.Spring基本的ApplicationContext.xml 本例中用的是 beans_wolf.xml(名字一定要注意,尽量用前面的) 配置了:
<!-- 1. 数据源 : DriverManagerDataSource -->
<!-- 2. mybatis的SqlSession的工厂: SqlSessionFactoryBean
dataSource / typeAliasesPackage -->
<!-- 3. mybatis自动扫描加载Sql映射文件 : MapperScannerConfigurer
sqlSessionFactory / basePackage /configLocation-->
<!-- 4. 事务管理 : DataSourceTransactionManager -->
<!-- 5. 使用声明式事务 -->
其中配置了数据库的具体信息,所以不在另外用属性文件了!
2.Spring MVC 的applicationContext-mvc.xml
配置了:自动扫描包,注解驱动,视图解析器
3.mybatis-config.xml 这个具体配置根据你的实际来弄!
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 >
<!-- 配置什么样的请求交由 SpringMVC 处理 -->
< url-pattern >*.action</ url-pattern >
</ servlet-mapping >
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遇到的一个很不咋地的问题
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
!!!少了这个<property name="configLocation" value="classpath:mybatis-config.xml" />
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< 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 >
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网友的一些问题及解决方法。。。
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Mapped Statements collection does not contain value for后面是什么类什么方法之类的: 错误原因有几种: 1、mapper.xml中没有加入namespace !!!! 2、mapper.xml中的方法和接口mapper的方法不对应 !!! 3、mapper.xml没有加入到mybatis-config.xml中(即总的配置文件),例外:配置了mapper文件的包路径的除外 !!! 4、mapper.xml文件名和所写的mapper名称不相同。 !! 5.java文件和xml文件的名称不一致 ! 6.可能是你的controller 或者说是handler 有问题!! |
另外:jsp 文件的位置要特别注意! index,一般在WebContent下!!!
那个xml文件出现问题一般是你的dtd约束,taglib等没弄好,自己细细品味下嘛,不知道度娘娘,实在不行在一起讨论哦!
5.完整Demo项目下载地址
Demo_SpringMVC_MyBatis 完整登录及list查询,无错误,几经验证!共同学习! |
SpringMVC MyBatis 相关jar包下载 |
如果无法下载,请留言索取,因为上传可能出现问题!