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Java SSM配置文件案例详解

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先对Spring SpringMVC和Mybatis单独进行配置,最后对三者进行整合配置 。

Spring

实际使用中,一般会使用注解+xml配置来实现spring功能,其中xml配置对上文进行总结,配置内容如下 。

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<? xml version = "1.0" encoding = "UTF-8" ?>
<!--在使用spring 相关jar包的时候进行配置 每个jar包对应一个xmlns和schemaLocation路径-->
<!--格式基本相关 只要修改相关的关键字-->
< beans xmlns = "http://www.springframework.org/schema/beans"
        xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
        xmlns:aop = "http://www.springframework.org/schema/aop"
        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.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--    开启注解扫描 ,才可以使用注解 可以使用use-default-filter配合include-filer和exclude-filter使用    -->
     < context:component-scan base-package = "com.jdbcTemplate" ></ context:component-scan >
 
<!--    开启aop-->
     < aop:aspectj-autoproxy ></ aop:aspectj-autoproxy >
 
<!--    JdbcTemplate使用-->
     < bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" destroy-method = "close" >
         < property name = "url" value = "jdbc:mysql:/book" />
         < property name = "username" value = "root" />
         < property name = "password" value = "LRY990722" />
         < property name = "driverClassName" value = "com.mysql.jdbc.Driver" />
     </ bean >
 
     < bean id = "'jdbcTemplate" class = "org.springframework.jdbc.core.JdbcTemplate" >
         < property name = "dataSource" ref = "dataSource" ></ property >
     < bean />
 
 
     <!--创建事务管理器-->
     < bean id = "transactionManager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" >
     <!--注入数据源-->
     < property name = "dataSource" ref = "dataSource" ></ property >
         <!--开启事务注解-->
     < tx:annotation-driven transaction-manager = "transactionManager" ></ tx:annotation-driven >
 
</ bean >
</ beans >

springMVC

web.xml配置文件 。

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<!-- 配置SpringMVC的前端控制器,对浏览器发送的请求统一进行处理 -->
< servlet >
     < servlet-name >springMVC</ servlet-name >
     < servlet-class >org.springframework.web.servlet.DispatcherServlet</ servlet-class >
     <!-- 通过初始化参数指定SpringMVC配置文件的位置和名称 -->
     < init-param >
         <!-- contextConfigLocation为固定值 -->
         < param-name >contextConfigLocation</ param-name >
         <!-- 使用classpath:表示从类路径查找配置文件,例如maven工程中的src/main/resources -->
         < param-value >classpath:springMVC.xml</ param-value >
     </ init-param >
     <!--
         作为框架的核心组件,在启动过程中有大量的初始化操作要做
         而这些操作放在第一次请求时才执行会严重影响访问速度
         因此需要通过此标签将启动控制DispatcherServlet的初始化时间提前到服务器启动时
     -->
     < load-on-startup >1</ load-on-startup >
</ servlet >
< servlet-mapping >
     < servlet-name >springMVC</ servlet-name >
     <!--
         设置springMVC的核心控制器所能处理的请求的请求路径
         /所匹配的请求可以是/login或.html或.js或.css方式的请求路径
         但是/不能匹配.jsp请求路径的请求
     -->
     < url-pattern >/</ url-pattern >
</ servlet-mapping >

springMVC.xml配置文件 。

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<!-- 自动扫描包 -->
< context:component-scan base-package = "com.atguigu.mvc.controller" />
 
<!-- 配置Thymeleaf视图解析器 -->
< bean id = "viewResolver" class = "org.thymeleaf.spring5.view.ThymeleafViewResolver" >
     < property name = "order" value = "1" />
     < property name = "characterEncoding" value = "UTF-8" />
     < property name = "templateEngine" >
         < bean class = "org.thymeleaf.spring5.SpringTemplateEngine" >
             < property name = "templateResolver" >
                 < bean class = "org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver" >
    
                     <!-- 视图前缀 -->
                     < property name = "prefix" value = "/WEB-INF/templates/" />
    
                     <!-- 视图后缀 -->
                     < property name = "suffix" value = ".html" />
                     < property name = "templateMode" value = "HTML5" />
                     < property name = "characterEncoding" value = "UTF-8" />
                 </ bean >
             </ property >
         </ bean >
     </ property >
</ bean >
 
<!--
    处理静态资源,例如html、js、css、jpg
   若只设置该标签,则只能访问静态资源,其他请求则无法访问
   此时必须设置<mvc:annotation-driven/>解决问题
  -->
< mvc:default-servlet-handler />
 
<!-- 开启mvc注解驱动 -->
< mvc:annotation-driven >
     < mvc:message-converters >
         <!-- 处理响应中文内容乱码 -->
         < bean class = "org.springframework.http.converter.StringHttpMessageConverter" >
             < property name = "defaultCharset" value = "UTF-8" />
             < property name = "supportedMediaTypes" >
                 < list >
                     < value >text/html</ value >
                     < value >application/json</ value >
                 </ list >
             </ property >
         </ bean >
     </ mvc:message-converters >
</ mvc:annotation-driven >

Mybatis

Mybatis-config.xml中配置文件 。

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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 >
     < environments default = "development" >
         < environment id = "development" >
             < transactionManager type = "JDBC" />
             < dataSource type = "POOLED" >
                 < property name = "driver" value = "com.mysql.jdbc.Driver" />
                 < property name = "url" value = "jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8" />
                 < property name = "username" value = "root" />
                 < property name = "password" value = "LRY990722" />
             </ dataSource >
         </ environment >
     </ environments >
 
<!--    mapper.xml都需要在mybatis核心配置文件中配置-->
     < mappers >
         < mapper resource = "com/example/mapper/UserMapper.xml" />
     </ mappers >
</ configuration >

mapper.xml中配置文件如下:

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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.example.mapper.UserMapper" >
     < select id = "selectUser" resultType = "com.example.pojo.User" >
         select * from user
     </ select >
</ mapper >

有时候读取不到mapperl.xml配置的原因,提示java.io.IOException: Could not find resource,原因可能有 1)配置文件是否在Resource路径下; 。

2)如果在src/main/java目录下,需要在项目的pom.xml中加入; 。

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< build >
     < resources >
         < resource >
             < directory >src/main/java</ directory >
             < includes >
                 < include >**/*.properties</ include >
                 < include >**/*.xml</ include >
             </ includes >
             < filtering >false</ filtering >
         </ resource >
         < resource >
             < directory >src/main/resources</ directory >
             < includes >
                 < include >**/*.properties</ include >
                 < include >**/*.xml</ include >
             </ includes >
             < filtering >false</ filtering >
         </ resource >
     </ resources >
</ build >

使得可以读取src/main/java下的xml和properti文件 。

3)如果还没有结果,看是否是自己的多层路径的问题,有时候创建文件时候例如com.example.mapper不是三层路径,可以展开看一下.

SSM整合

SSM整合配置 。

到此这篇关于Java SSM配置文件案例详解的文章就介绍到这了,更多相关Java SSM配置文件内容请搜索我以前的文章或继续浏览下面的相关文章希望大家以后多多支持我! 。

原文链接:https://blog.csdn.net/foreverlove1999/article/details/119967444 。

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