目录
一,JSR303
1.服务端验证
2.步骤
二,拦截器
1.简介
2.拦截器与过滤器
2.1 什么是过滤器
2.2 拦截器和过滤器的区别
3.拦截器案例
3.1 使用原理
一,JSR303
1.服务端验证
2.步骤
1.导入pom.xml配置
<!--做服务端参数校验 jSR303的jar包依赖-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.7.Final</version>
</dependency>
<?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>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>springmvc</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>springmvc Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>5.1.44</mysql.version>
<!--pagehelper分页jar依赖-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--pagehelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web,非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<!-- ********************** 日志配置 ********************** -->
<!--记得修改mybatis.cfg.xml添加如下内容-->
<!--<setting name="logImpl" value="LOG4J2"/>-->
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.9.1</version>
</dependency>
<!--web工程需要包含log4j-web,非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jsp依赖-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
<!--做服务端参数校验 jSR303的jar包依赖-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.7.Final</version>
</dependency>
</dependencies>
<build>
<finalName>springmvc</finalName>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>jdbc.properties</include>
<include>*.xml</include>
</includes>
</resource>
</resources>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
再进行其他的配置
applicationContext-mybatis.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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--1. 注解式开发 -->
<!-- 注解驱动 -->
<context:annotation-config/>
<!-- 用注解方式注入bean,并指定查找范围:com.javaxl.ssm及子子孙孙包-->
<context:component-scan base-package="com.ruojuan.ssm"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!--初始连接数-->
<property name="initialSize" value="10"/>
<!--最大活动连接数-->
<property name="maxTotal" value="100"/>
<!--最大空闲连接数-->
<property name="maxIdle" value="50"/>
<!--最小空闲连接数-->
<property name="minIdle" value="10"/>
<!--设置为-1时,如果没有可用连接,连接池会一直无限期等待,直到获取到连接为止。-->
<!--如果设置为N(毫秒),则连接池会等待N毫秒,等待不到,则抛出异常-->
<property name="maxWaitMillis" value="-1"/>
</bean>
<!--4. spring和MyBatis整合 -->
<!--1) 创建sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 指定数据源 -->
<property name="dataSource" ref="dataSource"/>
<!-- 自动扫描XxxMapping.xml文件,**任意路径 -->
<property name="mapperLocations" value="classpath*:com/ruojuan/ssm/**/mapper/*.xml"/>
<!-- 指定别名 -->
<property name="typeAliasesPackage" value="com/ruojuan/ssm/**/model"/>
<!--配置pagehelper插件-->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
helperDialect=mysql
</value>
</property>
</bean>
</array>
</property>
</bean>
<!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口),并实现这些接口,-->
<!-- 即可直接在程序中使用dao接口,不用再获取sqlsession对象-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--basePackage 属性是映射器接口文件的包路径。-->
<!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
<!--"com/javaxl/ssm/**/mapper"-->
<property name="basePackage" value="com/ruojuan/ssm/**/mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<aop:aspectj-autoproxy/>
</beans>
generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
<!-- 引入配置文件 -->
<properties resource="jdbc.properties"/>
<!--指定数据库jdbc驱动jar包的位置-->
<classPathEntry location="D:\\maven mulu\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>
<!-- 一个数据库一个context -->
<context id="infoGuardian">
<!-- 注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
</commentGenerator>
<!-- jdbc连接 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 类型转换 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) -->
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 01 指定javaBean生成的位置 -->
<!-- targetPackage:指定生成的model生成所在的包名 -->
<!-- targetProject:指定在该项目下所在的路径 -->
<javaModelGenerator targetPackage="com.ruojuan.ssm.model"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否对model添加构造函数 -->
<property name="constructorBased" value="true"/>
<!-- 是否针对string类型的字段在set的时候进行trim调用 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法,只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- 02 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.ruojuan.ssm.mapper"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
<!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
<!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
<javaClientGenerator targetPackage="com.ruojuan.ssm.mapper"
targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即为数据库名 -->
<!-- tableName为对应的数据库表 -->
<!-- domainObjectName是要生成的实体类 -->
<!-- enable*ByExample是否生成 example类 -->
<!--<table schema="" tableName="t_book" domainObjectName="Book"-->
<!--enableCountByExample="false" enableDeleteByExample="false"-->
<!--enableSelectByExample="false" enableUpdateByExample="false">-->
<!--<!– 忽略列,不生成bean 字段 –>-->
<!--<!– <ignoreColumn column="FRED" /> –>-->
<!--<!– 指定列的java数据类型 –>-->
<!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
<!--</table>-->
<!--<table schema="" tableName="t_hibernate_Book" domainObjectName="Hbook"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<!– 忽略列,不生成bean 字段 –>
<!– <ignoreColumn column="FRED" /> –>
<!– 指定列的java数据类型 –>
<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>
</table>
<table schema="" tableName="t_hibernate_category" domainObjectName="Category"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
</table>
<table schema="" tableName="t_hibernate_book_category" domainObjectName="HbookCategory"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
</table>-->
<table schema="" tableName="t_struts_class" domainObjectName="Clazz"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
</table>
</context>
</generatorConfiguration>
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/t280?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456
log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR
< FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间,单位是s,最小是5s. -->
<Configuration status="WARN" monitorInterval="30">
<Properties>
<!-- 配置日志文件输出目录 ${sys:user.home} -->
<Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property>
<property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property>
<property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property>
<property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property>
</Properties>
<Appenders>
<!--这个输出控制台的配置 -->
<Console name="Console" target="SYSTEM_OUT">
<!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
<ThresholdFilter level="trace" onMatch="ACCEPT"
onMismatch="DENY" />
<!-- 输出日志的格式 -->
<!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称
%m : 日志内容,即 logger.info("message") %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M
: 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 -->
<PatternLayout pattern="${PATTERN}" />
</Console>
<!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用 -->
<!--append为TRUE表示消息增加到指定文件中,false表示消息覆盖指定的文件内容,默认值是true -->
<File name="log" fileName="logs/test.log" append="false">
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</File>
<!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size, 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档 -->
<RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
<!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
<ThresholdFilter level="info" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<!-- 基于时间的滚动策略,interval属性用来指定多久滚动一次,默认是1 hour。 modulate=true用来调整时间:比如现在是早上3am,interval是4,那么第一次滚动是在4am,接着是8am,12am...而不是7am. -->
<!-- 关键点在于 filePattern后的日期格式,以及TimeBasedTriggeringPolicy的interval, 日期格式精确到哪一位,interval也精确到哪一个单位 -->
<!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log -->
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
<!-- SizeBasedTriggeringPolicy:Policies子节点, 基于指定文件大小的滚动策略,size属性用来定义每个日志文件的大小. -->
<!-- <SizeBasedTriggeringPolicy size="2 kB" /> -->
</Policies>
</RollingFile>
<RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
<ThresholdFilter level="warn" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="2 kB" />
</Policies>
<!-- DefaultRolloverStrategy属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 -->
<DefaultRolloverStrategy max="20" />
</RollingFile>
<RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
<ThresholdFilter level="error" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log -->
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
<!-- <SizeBasedTriggeringPolicy size="10 MB" /> -->
</Policies>
</RollingFile>
</Appenders>
<!--然后定义logger,只有定义了logger并引入的appender,appender才会生效 -->
<Loggers>
<!--过滤掉spring和mybatis的一些无用的DEBUG信息 -->
<logger name="org.springframework" level="INFO"></logger>
<logger name="org.mybatis" level="INFO"></logger>
<!-- 第三方日志系统 -->
<logger name="org.springframework" level="ERROR" />
<logger name="org.hibernate" level="ERROR" />
<logger name="org.apache.struts2" level="ERROR" />
<logger name="com.opensymphony.xwork2" level="ERROR" />
<logger name="org.jboss" level="ERROR" />
<!-- 配置日志的根节点 -->
<root level="all">
<appender-ref ref="Console" />
<appender-ref ref="RollingFileInfo" />
<appender-ref ref="RollingFileWarn" />
<appender-ref ref="RollingFileError" />
</root>
</Loggers>
</Configuration>
mybits.cfg.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>
<!-- 引入外部配置文件 -->
<properties resource="jdbc.properties"/>
<settings>
<setting name="logImpl" value="LOG4J2"/>
</settings>
<!-- 别名 -->
<typeAliases>
<!--<typeAlias type="com.javaxl.model.Book" alias="Book"/>-->
</typeAliases>
<plugins>
<!-- 配置分页插件PageHelper, 4.0.0以后的版本支持自动识别使用的数据库 -->
<plugin interceptor="com.github.pagehelper.PageInterceptor">
</plugin>
</plugins>
<!-- 配置mybatis运行环境 -->
<environments default="development">
<environment id="development">
<!-- type="JDBC" 代表使用JDBC的提交和回滚来管理事务 -->
<transactionManager type="jdbc"/>
<!-- mybatis提供了3种数据源类型,分别是:POOLED,UNPOOLED,JNDI -->
<!-- POOLED 表示支持JDBC数据源连接池 -->
<!-- UNPOOLED 表示不支持数据源连接池 -->
<!-- JNDI 表示支持外部数据源连接池 -->
<dataSource type="POOLED">
<property name="driver"
value="${jdbc.driver}"/>
<property name="url"
value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/ruojuan/ssm/mapper/ClazzMapper.xml"/>
</mappers>
</configuration>
mvc.tld
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>mvc 1.1 core library</description>
<display-name>mvc core</display-name>
<tlib-version>1.1</tlib-version>
<short-name>mvc</short-name>
<uri>http://jsp.veryedu.cn</uri>
<tag>
<name>page</name>
<tag-class>com.ruojuan.ssm.tag.PageTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>pageBean</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
springmvc-servlet.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" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 通过context:component-scan元素扫描指定包下的控制器-->
<!--1) 扫描com.javaxl.zf及子子孙孙包下的控制器(扫描范围过大,耗时)-->
<aop:aspectj-autoproxy/>
<context:component-scan base-package="com.ruojuan.ssm"/>
<!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
<!--两个bean,这两个bean是spring MVC为@Controllers分发请求所必须的。并提供了数据绑定支持,-->
<!--@NumberFormatannotation支持,@DateTimeFormat支持,@Valid支持,读写XML的支持(JAXB),读写JSON的支持(Jackson)-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--3) ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- viewClass需要在pom中引入两个包:standard.jar and jstl.jar -->
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--4) 单独处理图片、样式、js等资源 -->
<!--<mvc:resources location="/css/" mapping="/css/**"/>-->
<mvc:resources location="/images/" mapping="/images/**"/>
<!--<mvc:resources location="/js/" mapping="/js/**"/>-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 必须和用户JSP 的pageEncoding属性一致,以便正确解析表单的内容 -->
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 文件最大大小(字节) 1024*1024*50=50M-->
<property name="maxUploadSize" value="52428800"></property>
<!--resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常-->
<property name="resolveLazily" value="true"/>
</bean>
<!--配置拦截器-->
<!--<mvc:interceptors>
<!–针对于所有的请求进行拦截–>
<bean class="com.ruojuan.ssm.intercept.OneHandlerInterceptor"></bean>
</mvc:interceptors>-->
<!--配置拦截器-->
<mvc:interceptors>
<mvc:interceptor>
<!--拦截所有请求-->
<mvc:mapping path="/**"/>
<bean class="com.ruojuan.ssm.intercept.OneHandlerInterceptor"></bean>
</mvc:interceptor>
<mvc:interceptor>
<!--拦截以clz开头的-->
<mvc:mapping path="/clz/**"/>
<bean class="com.ruojuan.ssm.intercept.TwoHandlerInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>
</beans>
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 读取Spring上下文的监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC servlet -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--此参数可以不配置,默认值为:/WEB-INF/springmvc-servlet.xml-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<!--web.xml 3.0的新特性,是否支持异步-->
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 中文乱码处理 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!--web.xml 3.0的新特性,是否支持异步-->
<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>
</web-app>
实体类:
用注解的方式来提示是否输入
Clzz.java实体类
package com.ruojuan.ssm.model;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
/**
* @NotNull :作用于基本数据类型
* @NotEmpty 作用于集合
* @NotBlank 作用于字符串
*/
public class Clazz {
@NotNull(message = "cid不能为空")
private Integer cid;
@NotBlank(message = "班级名不能为空")
private String cname;
@NotBlank(message = "教员老师不能为空")
private String cteacher;
private String pic;
public Clazz(Integer cid, String cname, String cteacher, String pic) {
this.cid = cid;
this.cname = cname;
this.cteacher = cteacher;
this.pic = pic;
}
public Clazz() {
super();
}
public Integer getCid() {
return cid;
}
public void setCid(Integer cid) {
this.cid = cid;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getCteacher() {
return cteacher;
}
public void setCteacher(String cteacher) {
this.cteacher = cteacher;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
}
控制层ClazzController.java
// 给数据添加服务端校验
@RequestMapping("/valiAdd")
public String valiAdd(@Validated Clazz clazz, BindingResult result,HttpServletRequest req){
// 如果服务端验证不通过,有错误
if(result.hasErrors()){
// 服务端验证了实体类的多个属性,多个属性都没有验证通过
List<FieldError> fieldErrors = result.getFieldErrors();
Map<String,Object> map = new HashMap<>();
for (FieldError fieldError : fieldErrors) {
// 将多个属性的验证失败信息输送到控制台
System.out.println(fieldError.getField() + ":" + fieldError.getDefaultMessage());
map.put(fieldError.getField(),fieldError.getDefaultMessage());
}
req.setAttribute("errorMap",map);
}else {
this.clazzBiz.insertSelective(clazz);
return "redirect:/clz/list";
}
return "clzEdit";
}
前端代码:
<body>
<%--<form action="${pageContext.request.contextPath }/clz/${empty b ? 'add' : 'edit'}" method="post">--%>
<form action="${pageContext.request.contextPath }/clz/${empty b ? 'valiAdd' : 'edit'}" method="post">
id:<input type="text" name="cid" value="${b.cid }"><span style="color: red;">${errorMap.cid}</span><br>
cname:<input type="text" name="cname" value="${b.cname }"><span style="color: red;">${errorMap.cname}</span><br>
cteacher:<input type="text" name="cteacher" value="${b.cteacher }"><span style="color: red;">${errorMap.cteacher}</span><br>
<input type="submit">
</form>
</body>
效果:
当你不输入时就提示不能输入空值
二,拦截器
1.简介
SpringMVC的处理器拦截器,类似于Servlet开发中的过滤器Filter,用于对处理器进行预处理和后处理。
依赖于web框架,在实现上基于Java的反射机制,属于面向切面编程(AOP)的一种运用。由于拦截器是基于web框架的调用,因此可以使用Spring的依赖注入(DI)进行一些业务操作,同时一个拦截器实例在一个
controller生命周期之内可以多次调用。
2.拦截器与过滤器
2.1 什么是过滤器
依赖于servlet容器。在实现上基于函数回调,可以对几乎所有请求进行过滤,但是缺点是一个过滤器实例
只能在容器初始化时调用一次。使用过滤器的目的是用来做一些过滤操作,比如:在过滤器中修改字符编码;
在过滤器中修改HttpServletRequest的一些参数,包括:过滤低俗文字、危险字符等。
2.2 拦截器和过滤器的区别
过滤器(filter):
1) filter属于Servlet技术,只要是web工程都可以使用
2) filter主要对所有请求过滤
3) filter的执行时机早于Interceptor
拦截器(interceptor)
1) interceptor属于SpringMVC技术,必须要有SpringMVC环境才可以使用
2) interceptor通常对处理器Controller进行拦截
3) interceptor只能拦截dispatcherServlet处理的请求
应用场景
1)日志记录:记录请求信息的日志,以便进行信息监控、信息统计、计算PV(Page View)等。
2)权限检查:如登录检测,进入处理器检测是否登录,如果没有直接返回到登录页面;
3)性能监控:有时候系统在某段时间莫名其妙的慢,可以通过拦截器在进入处理器之前记录开始时间,在处理完后记录结束时间,从而得到该请求的处理时间(如果有反向代理,如apache可以自动记录);
4)通用行为:读取cookie得到用户信息并将用户对象放入请求,从而方便后续流程使用,还有如提取Locale、Theme信息等,只要是多个Controller中的处理方法都需要的,我们就可以使用拦截器实现。
3.拦截器案例
3.1 使用原理
1. 拦截器入门:
①创建一个类名为HellController
package com.ruojuan.ssm.web;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author ruojuan
* @site 123456999
* @company 玉渊工作室
* @create 2022-08-19 16:44
*/
@Controller
public class HellController {
@RequestMapping("/hello")
public String hello(){
System.out.println("进入业务方法。。。。");
return "List";
}
}
②再创建一个类为拦截器OneHandlerInterceptor
package com.ruojuan.ssm.intercept;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @author ruojuan
* @site 123456999
* @company 玉渊工作室
* @create 2022-08-19 16:37
*/
public class OneInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("【OneInterceptor】:preHandle...");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("【OneInterceptor】:postHandle...");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("【OneInterceptor】:afterCompletion...");
}
}
③在springmvc-servlet.xml配置拦截器文件
<mvc:interceptors>
<bean class="com.ruojuan.ssm.intercept.OneHandlerInterceptor"></bean>
</mvc:interceptors>
④结果
2.拦截器链
①创建另一个拦截器
package com.ruojuan.ssm.intercept;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @author ruojuan
* @site 123456999
* @company 玉渊工作室
* @create 2022-08-19 16:37
*/
public class OneInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("【OneInterceptor】:preHandle...");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("【OneInterceptor】:postHandle...");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("【OneInterceptor】:afterCompletion...");
}
}
package com.ruojuan.ssm.intercept;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @author ruojuan
* @site 123456999
* @company 玉渊工作室
* @create 2022-08-19 16:47
*/
public class TwoHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//预处理
System.out.println("[OneHandlerInterceptor].preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//后处理
System.out.println("[OneHandlerInterceptor].postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//完成后处理
System.out.println("[OneHandlerInterceptor].afterCompletion");
}
}
②springmvc-servlet.xml配置文件
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.zking.ssm.interceptor.OneInterceptor"></bean>
</mvc:interceptor>
<mvc:interceptor>
<mvc:mapping path="/clz/**"/>
<bean class="com.zking.ssm.interceptor.TwoInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>
③
④
public class OneInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("【OneInterceptor】:preHandle...");
StringBuffer url = request.getRequestURL();
if (url.indexOf("/login") > 0 || url.indexOf("/logout") > 0){
// 如果是 登录、退出 中的一种
return true;
}
// 代表不是登录,也不是退出
// 除了登录、退出,其他操作都需要判断是否 session 登录成功过
String uname = (String) request.getSession().getAttribute("uname");
if (uname == null || "".equals(uname)){
return false;
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("【OneInterceptor】:postHandle...");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("【OneInterceptor】:afterCompletion...");
}
}
⑤
@Controller
public class LoginController {
@RequestMapping("/login")
public String login(HttpServletRequest req){
String uname = req.getParameter("uname");
HttpSession session = req.getSession();
if ("zs".equals(uname)){
session.setAttribute("uname",uname);
}
return "redirect:/clz/list";
}
@RequestMapping("/logout")
public String logout(HttpServletRequest req){
req.getSession().invalidate();
return "redirect:/clz/list";
}
}
⑥