SpringMVC是一个基于MVC架构的框架,它可以帮助我们实现前后端的分离,同时也能很好地支持前端的增删改查操作。
配置
Cloudjun
<?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>CloudJun 1.1 core library</description> <display-name>CloudJun core</display-name> <tlib-version>1.1</tlib-version> <short-name>CloudJun</short-name> <uri>http://jsp.veryedu.cn</uri> <tag> <name>page</name> <tag-class>com.CloudJun.tag.PageTag</tag-class> <body-content>JSP</body-content> <attribute> <name>pageBean</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <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> <!-- Spring和web项目集成start --> <!-- spring上下文配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context.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和web项目集成end --> <!-- 中文乱码处理 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <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> <!-- 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>classpath:spring-mvc.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> </web-app>
zhang.tld
<?xml version="1.0" encoding="UTF-8"?> <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> <!-- Spring和web项目集成start --> <!-- spring上下文配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context.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和web项目集成end --> <!-- 中文乱码处理 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <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> <!-- 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>classpath:spring-mvc.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> </web-app>
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:\\temp\\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.CloudJun.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.CloudJun.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.CloudJun.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_hotel" domainObjectName="Hotel" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"> </table> </context> </generatorConfiguration>
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost/mybatis_ssm?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>
spring-context.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="classpath:spring-mybatis.xml"></import> </beans>
spring-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:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1) 扫描com.zking.zf及子子孙孙包下的控制器(扫描范围过大,耗时)--> <context:component-scan base-package="com.yuan"/> <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter --> <mvc:annotation-driven /> <!--3) 创建ViewResolver视图解析器 --> <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="/WEB-INF/jsp/"/> <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="/js/" mapping="/js/**"/> <mvc:resources location="WEB-INF/images/" mapping="/images/**"/>--> <!-- <mvc:resources location="/static/" mapping="/static/**"/>--> <aop:aspectj-autoproxy/> </beans>
spring-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.yuan"/> <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/yuan/**/mapper/*.xml"/> <!-- 指定别名 --> <property name="typeAliasesPackage" value="com/yuan/**/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--> <property name="basePackage" value="com/yuan/**/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>
StudentBizImpl
package com.zhanghao.Biz.Impl; import com.zhanghao.Biz.StudentBiz; import com.zhanghao.mapper.StudentMapper; import com.zhanghao.model.Student; import com.zhanghao.utils.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * @author zhanghao * @site * @company s集团 * @create 2023-09-08 23:12 */ @Service public class StudentBizImpl implements StudentBiz { @Autowired private StudentMapper studentMapper; @Override public int deleteByPrimaryKey(String sid) { return studentMapper.deleteByPrimaryKey(sid); } @Override public int insert(Student record) { return studentMapper.insert(record); } @Override public int insertSelective(Student record) { return studentMapper.insertSelective(record); } @Override public Student selectByPrimaryKey(String sid) { return studentMapper.selectByPrimaryKey(sid); } @Override public int updateByPrimaryKeySelective(Student record) { return studentMapper.updateByPrimaryKeySelective(record); } @Override public int updateByPrimaryKey(Student record) { return studentMapper.updateByPrimaryKey(record); } @Override public List<Student> selBySnamePager(Student student, PageBean pageBean) { return studentMapper.selBySnamePager(student); } }
PagerAspect
package com.zhanghao.aspect; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.zhanghao.utils.PageBean; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; import java.util.List; /** * @author zhanghao * @site * @company s集团 * @create 2023-08-25 17:01 */ @Aspect @Component public class PagerAspect { @Around("execution(* *..*Biz.*Pager(..))") public Object invoke(ProceedingJoinPoint args) throws Throwable { PageBean pageBean = null; //获取目标中的所有方法 Object[] args1 = args.getArgs(); for (Object o : args1) { if (o instanceof PageBean) { pageBean = (PageBean) o; break; } } if (pageBean != null && pageBean.isPagination()) { PageHelper.startPage(pageBean.getPage(), pageBean.getRows()); } Object proceed = args.proceed(); if (pageBean != null && pageBean.isPagination()) { PageInfo pageInfo = new PageInfo((List) proceed); pageBean.setTotal((int) pageInfo.getTotal()); } return proceed; } }
PageTag
package com.zhanghao.tag; import com.zhanghao.utils.PageBean; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.BodyTagSupport; import java.io.IOException; import java.util.Map; import java.util.Map.Entry; import java.util.Set; public class PageTag extends BodyTagSupport{ private PageBean pageBean;// 包含了所有分页相关的元素 public PageBean getPageBean() { return pageBean; } public void setPageBean(PageBean pageBean) { this.pageBean = pageBean; } @Override public int doStartTag() throws JspException { // 没有标签体,要输出内容 JspWriter out = pageContext.getOut(); try { out.print(toHTML()); } catch (IOException e) { e.printStackTrace(); } return super.doStartTag(); } private String toHTML() { StringBuffer sb = new StringBuffer(); // 隐藏的form表单---这个就是上一次请求下次重新发的奥义所在 // 上一次请求的URL sb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>"); sb.append(" <input type='hidden' name='page'>"); // 上一次请求的参数 Map<String, String[]> paramMap = pageBean.getMap(); if(paramMap != null && paramMap.size() > 0) { Set<Entry<String, String[]>> entrySet = paramMap.entrySet(); for (Entry<String, String[]> entry : entrySet) { // 参数名 String key = entry.getKey(); // 参数值 for (String value : entry.getValue()) { // 上一次请求的参数,再一次组装成了新的Form表单 // 注意:page参数每次都会提交,我们需要避免 if(!"page".equals(key)) { sb.append(" <input type='hidden' name='"+key+"' value='"+value+"' >"); } } } } sb.append("</form>"); // 分页条 sb.append("<ul class='pagination justify-content-center'>"); sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'"); sb.append(" href='javascript:gotoPage(1)'>首页</a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'"); sb.append(" href='javascript:gotoPage("+pageBean.getPreivousPage()+")'><</a></li>");// less than 小于号 // sb.append(" <li class='page-item'><a class='page-link' href='#'>1</a></li>"); // sb.append(" <li class='page-item'><a class='page-link' href='#'>2</a></li>"); sb.append(" <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getNextPage()+")'>></a></li>"); sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getMaxPage()+")'>尾页</a></li>"); sb.append(" <li class='page-item go-input'><b>到第</b><input class='page-link'"); sb.append(" type='text' id='skipPage' name='' /><b>页</b></li>"); sb.append(" <li class='page-item go'><a class='page-link'"); sb.append(" href='javascript:skipPage()'>确定</a></li>"); sb.append(" <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>"); sb.append("</ul>"); // 分页执行的JS代码 sb.append("<script type='text/javascript'>"); sb.append(" function gotoPage(page) {"); sb.append(" document.getElementById('pageBeanForm').page.value = page;"); sb.append(" document.getElementById('pageBeanForm').submit();"); sb.append(" }"); sb.append(" function skipPage() {"); sb.append(" var page = document.getElementById('skipPage').value;"); sb.append(" if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.getMaxPage()+") {"); sb.append(" alert('请输入1~"+pageBean.getMaxPage()+"的数字');"); sb.append(" return;"); sb.append(" }"); sb.append(" gotoPage(page);"); sb.append(" }"); sb.append("</script>"); return sb.toString(); } }
实现功能
StudentController
package com.zhanghao.web; import com.zhanghao.Biz.StudentBiz; import com.zhanghao.model.Student; import com.zhanghao.utils.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpServletRequest; import java.util.List; /** * @author zhanghao * @site * @company s集团 * @create 2023-09-08 21:52 */ @Controller @RequestMapping("/student") public class StudentController { @Autowired private StudentBiz studentBiz; @RequestMapping("/list") public String list(Student student, HttpServletRequest request){ PageBean pageBean = new PageBean(); pageBean.setRequest(request); List<Student> students = studentBiz.selBySnamePager(student, pageBean); request.setAttribute("list",students); request.setAttribute("pageBean",pageBean); return "stu/list"; } @RequestMapping("/add") public String add(Student student){ studentBiz.insertSelective(student); return "redirect:list"; } @RequestMapping("/del/{sid}") public String add(@PathVariable("sid") String sid){ studentBiz.deleteByPrimaryKey(sid); return "redirect:/student/list"; } @RequestMapping("/edit") public String edit(Student student){ studentBiz.updateByPrimaryKeySelective(student); return "redirect:list"; } @RequestMapping("/pareSave") public String pareSave(Student student, Model model){ if(student!=null && student.getSid()!=null){ Student s = studentBiz.selectByPrimaryKey(student.getSid()); model.addAttribute("s",s); } return "stu/edit"; } }
JSP
List.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html > <html> <head> <%@ include file="/common/header.jsp" %> </head> <body> <form class="form-inline" action="/student/list" method="post"> <div class="form-group mb-2"> <input type="text" class="form-control-plaintext" name="sname" placeholder="请输入学生名称"> <!-- <input name="rows" value="20" type="hidden"> --> <!-- 不想分页 --> <%-- <input name="pagination" value="false" type="hidden">--%> </div> <button type="submit" class="btn btn-primary mb-2">查询</button> <a class="btn btn-primary mb-2" href="/student/pareSave">新增</a> </form> <table class="table table-striped "> <thead> <tr> <th scope="col">学生编号</th> <th scope="col">学生名称</th> <th scope="col">学生年龄</th> <th scope="col">学生性别</th> <th scope="col">操作</th> </tr> </thead> <tbody> <c:forEach var="s" items="${list }"> <tr> <td>${s.sid }</td> <td>${s.sname }</td> <td>${s.sage }</td> <td>${s.ssex }</td> <td> <a href="/student/pareSave?sid=${s.sid}">修改</a> <a href="/student/del/${s.sid}">删除</a> </td> </tr> </c:forEach> </tbody> </table> <!-- 这一行代码就相当于前面分页需求前端的几十行了 --> <z:page pageBean="${pageBean }"></z:page> ${pageBean} </body> </html>
edit.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title></title> </head> <body> <form action="${pageContext.request.contextPath }/${empty s ? 'student/add' : 'student/edit'}" method="post"> 学生编号:<input type="text" name="sid" value="${s.sid }"><br> 学生姓名:<input type="text" name="sname" value="${s.sname }"><br> 学生年龄:<input type="text" name="sage" value="${s.sage }"><br> 学生性别:<input type="text" name="ssex" value="${s.ssex }"><br> <input type="submit"> </form> </body> </html>
heard.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html > <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css" rel="stylesheet"> <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script> <base href="${pageContext.request.contextPath }" /> </head>
前端增删改查实现一般需要完成以下几个步骤:
- 前端页面设计。前端页面应该清晰明了,使用户易于理解和使用。需要定义表格用于展示数据,包括表头和表内容,同时还需要添加各种操作按钮用于增加、修改和删除数据。
- 接口设计。接口是前后端之间的桥梁,要实现增删改查功能,需要定义对应的增删改查接口。接口应该具有明确的功能和参数,以便前端能够正确调用。
- 数据库设计。数据库是存储数据的重要组成部分。需要定义对应的数据表,包括数据列、数据类型和主键等,以便后台能够存储数据并进行操作。
- 前端逻辑实现。前端需要编写对应的JavaScript代码来实现增删改查功能。具体包括:对表格进行初始化、监听操作按钮点击事件、调用后台接口进行数据操作等。
- 后台接口实现。后台接口需要根据前端定义的接口进行实现。一般需要包括对应的增删改查方法,以便能够正确处理前端传递的参数和数据。
- 后台逻辑实现。后台需要根据前端传递的参数和数据,进行相应的处理,包括数据的存储和修改、数据的查询和删除等。同时,还需要对数据进行校验和验证,保证数据的正确性和安全性。
综上所述,前端增删改查实现需要前后端配合完成,同时还需要遵循一定的规范和标准,才能够实现功能完善、性能优良的系统。