- SpringMVC之CRUD(增删改查)
# 创建表 CREATE TABLE Student ( sid INT PRIMARY KEY, sname VARCHAR(50), sage INT, spic VARCHAR(255)); 给student表插入数据 INSERT INTO Student (sid, sname, sage, spic) VALUES (1, 'John Do', 25, 'path/to/image1.jpg'), (2, 'Jane Smith', 30, 'path/to/image2.jpg'), (3, 'Alex Johnson', 35, 'path/to/image3.jpg'), (4, 'Emily Davis', 28, 'path/to/image4.jpg'), (5, 'Michael Wilson', 40, 'path/to/image5.jpg'), (6, 'Sarah Brown', 37, 'path/to/image6.jpg'), (7, 'David Lee', 45, 'path/to/image7.jpg'), (8, 'Carolyn Taylor', 22, 'path/to/image8.jpg');
公共页面跳转,配置。。。
package com.zlj.web; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; /** * @author zlj * @create 2023-09-07 14:50 * 处理页面跳转 * 以往 *<a href="clz/preSave">新增</a> *<a href="book/preSave">新增</a> *<a href="order/preSave">新增</a> * 现在 *<a href="page/clz/preSave">新增</a> *<a href="page/book/preSave">新增</a> *<a href="page/order/preSave">新增</a> */ @Controller public class pageController { @RequestMapping("/page/{page}") public String toPage(@PathVariable("page") String page){ return page; } @RequestMapping("/page/{dir}{page}") public String toDirPage( @PathVariable("dir") String dir, @PathVariable("page") String page){ return dir + "/" + page; } // @RequestMapping("/order/presave") // public String orderpre(){ // return "/order/presave"; // } // @RequestMapping("/clz/presave") // public String clzpre(){ // return "/clz/presave"; // } }
package com.zlj.util; import javax.servlet.http.HttpServletRequest; import java.io.Serializable; import java.util.Map; public class PageBean implements Serializable { private static final long serialVersionUID = 2422581023658455731L; //页码 private int page=1; //每页显示记录数 private int rows=10; //总记录数 private int total=0; //是否分页 private boolean isPagination=true; //上一次的请求路径 private String url; //获取所有的请求参数 private Map<String,String[]> map; public PageBean() { super(); } //设置请求参数 public void setRequest(HttpServletRequest req) { String page=req.getParameter("page"); String rows=req.getParameter("rows"); String pagination=req.getParameter("pagination"); this.setPage(page); this.setRows(rows); this.setPagination(pagination); this.url=req.getContextPath()+req.getServletPath(); this.map=req.getParameterMap(); } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public Map<String, String[]> getMap() { return map; } public void setMap(Map<String, String[]> map) { this.map = map; } public int getPage() { return page; } public void setPage(int page) { this.page = page; } public void setPage(String page) { if(null!=page&&!"".equals(page.trim())) this.page = Integer.parseInt(page); } public int getRows() { return rows; } public void setRows(int rows) { this.rows = rows; } public void setRows(String rows) { if(null!=rows&&!"".equals(rows.trim())) this.rows = Integer.parseInt(rows); } public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public void setTotal(String total) { this.total = Integer.parseInt(total); } public boolean isPagination() { return isPagination; } public void setPagination(boolean isPagination) { this.isPagination = isPagination; } public void setPagination(String isPagination) { if(null!=isPagination&&!"".equals(isPagination.trim())) this.isPagination = Boolean.parseBoolean(isPagination); } /** * 获取分页起始标记位置 * @return */ public int getStartIndex() { //(当前页码-1)*显示记录数 return (this.getPage()-1)*this.rows; } /** * 末页 * @return */ public int getMaxPage() { int totalpage=this.total/this.rows; if(this.total%this.rows!=0) totalpage++; return totalpage; } /** * 下一页 * @return */ public int getNextPage() { int nextPage=this.page+1; if(this.page>=this.getMaxPage()) nextPage=this.getMaxPage(); return nextPage; } /** * 上一页 * @return */ public int getPreivousPage() { int previousPage=this.page-1; if(previousPage<1) previousPage=1; return previousPage; } @Override public String toString() { return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination + "]"; } }
package com.zlj.util; import com.fasterxml.jackson.databind.ObjectMapper; import javax.servlet.http.HttpServletResponse; import java.io.PrintWriter; public class ResponseUtil { public static void write(HttpServletResponse response,Object o)throws Exception{ response.setContentType("text/html;charset=utf-8"); PrintWriter out=response.getWriter(); out.println(o.toString()); out.flush(); out.close(); } public static void writeJson(HttpServletResponse response,Object o)throws Exception{ ObjectMapper om = new ObjectMapper(); // om.writeValueAsString(o)代表了json串 write(response, om.writeValueAsString(o)); } }
//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:\\software\\apache-maven-3.5.0-bin\\apache-maven-3.5.0-bin\\apache-maven-3.5.0\\conf\\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.zlj.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.zlj.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.zlj.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="student" domainObjectName="Stu" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"> </table> </context> </generatorConfiguration>
//jdbc.properties jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://47.100.191.44:3308/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8 jdbc.username=test01 jdbc.password=test01
//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-content.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"> <!-- String框架与mybatis整合的配置文件加载到Spring的上下文中--> <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.zlj"/> <!--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/**"/> <!-- 处理controller层发送请求到biz，会经过切面拦截处理--> <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.zlj"/> <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/zlj/**/mapper/*.xml"/> <!-- 指定别名 --> <property name="typeAliasesPackage" value="com/zlj/**/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/zlj/**/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>
//header.jsp <%@ page contentType="text/html; charset=UTF-8" language="java" %> <%@ 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 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"> <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> <title>学生信息</title> <base href="${pageContext.request.contextPath }"/> <style type="text/css"> .page-item input { padding: 0; width: 40px; height: 100%; text-align: center; margin: 0 6px; } .page-item input, .page-item b { line-height: 38px; float: left; font-weight: 400; } .page-item.go-input { margin: 0 10px; } </style> </head> <body> <% request.setAttribute("ctx",request.getContextPath()); %> </body> </html>
//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-content.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>
//zlj.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>zlj 1.1 core library</description> <display-name>zlj core</display-name> <tlib-version>1.1</tlib-version> <short-name>zlj</short-name> <uri>http://jsp.veryedu.cn</uri> <tag> <name>page</name> <tag-class>com.zlj.tag.PageTag</tag-class> <body-content>JSP</body-content> <attribute> <name>pageBean</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
后台接口准备
ssm的增删改查
1.先逆向生成对应的类（model，mapper.xml，mapper.java）
2.biz层
3.web层（依托于自定义mvc的分页标签==>pom.xml）
4.前端
package com.zlj.model; import lombok.ToString; @ToString public class Stu { private Integer sid; private String sname; private Integer sage; private String spic="暂无图片"; public Stu(Integer sid, String sname, Integer sage, String spic) { this.sid = sid; this.sname = sname; this.sage = sage; this.spic = spic; } public Stu() { super(); } public Integer getSid() { return sid; } public void setSid(Integer sid) { this.sid = sid; } public String getSname() { return sname; } public void setSname(String sname) { this.sname = sname; } public Integer getSage() { return sage; } public void setSage(Integer sage) { this.sage = sage; } public String getSpic() { return spic; } public void setSpic(String spic) { this.spic = spic; } }
<?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.zlj.mapper.StuMapper" > <resultMap id="BaseResultMap" type="com.zlj.model.Stu" > <constructor > <idArg column="sid" jdbcType="INTEGER" javaType="java.lang.Integer" /> <arg column="sname" jdbcType="VARCHAR" javaType="java.lang.String" /> <arg column="sage" jdbcType="INTEGER" javaType="java.lang.Integer" /> <arg column="spic" jdbcType="VARCHAR" javaType="java.lang.String" /> </constructor> </resultMap> <sql id="Base_Column_List" > sid, sname, sage, spic </sql> <select id="selectByCon" resultType="com.zlj.model.Stu" parameterType="com.zlj.model.Stu" > select <include refid="Base_Column_List" /> from student <where> <if test="sname != null"> and sname like concat('%' , #{sname} , '%') </if> </where> </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from student where sid = #{sid,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from student where sid = #{sid,jdbcType=INTEGER} </delete> <insert id="insert" parameterType="com.zlj.model.Stu" > insert into student (sid, sname, sage, spic) values (#{sid,jdbcType=INTEGER}, #{sname,jdbcType=VARCHAR}, #{sage,jdbcType=INTEGER}, #{spic,jdbcType=VARCHAR}) </insert> <insert id="insertSelective" parameterType="com.zlj.model.Stu" > insert into student <trim prefix="(" suffix=")" suffixOverrides="," > <if test="sid != null" > sid, </if> <if test="sname != null" > sname, </if> <if test="sage != null" > sage, </if> <if test="spic != null" > spic, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="sid != null" > #{sid,jdbcType=INTEGER}, </if> <if test="sname != null" > #{sname,jdbcType=VARCHAR}, </if> <if test="sage != null" > #{sage,jdbcType=INTEGER}, </if> <if test="spic != null" > #{spic,jdbcType=VARCHAR}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.zlj.model.Stu" > update student <set > <if test="sname != null" > sname = #{sname,jdbcType=VARCHAR}, </if> <if test="sage != null" > sage = #{sage,jdbcType=INTEGER}, </if> <if test="spic != null" > spic = #{spic,jdbcType=VARCHAR}, </if> </set> where sid = #{sid,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="com.zlj.model.Stu" > update student set sname = #{sname,jdbcType=VARCHAR}, sage = #{sage,jdbcType=INTEGER}, spic = #{spic,jdbcType=VARCHAR} where sid = #{sid,jdbcType=INTEGER} </update> </mapper>
package com.zlj.mapper; import com.zlj.model.Stu; import org.springframework.stereotype.Repository; import java.util.List; @Repository public interface StuMapper { int deleteByPrimaryKey(Integer sid); int insert(Stu record); int insertSelective(Stu record); Stu selectByPrimaryKey(Integer sid); int updateByPrimaryKeySelective(Stu record); int updateByPrimaryKey(Stu record); List<Stu> selectByCon(Stu stu); }
package com.zlj.biz; import com.zlj.model.Stu; import com.zlj.util.PageBean; import java.util.List; /** * @author zlj * @create 2023-09-07 17:09 */ public interface StuBiz { int deleteByPrimaryKey(Integer sid); int insert(Stu record); int insertSelective(Stu record); Stu selectByPrimaryKey(Integer sid); int updateByPrimaryKeySelective(Stu record); int updateByPrimaryKey(Stu record); List<Stu> ListPager(Stu stu, PageBean PageBean); }
package com.zlj.biz.Impl; import com.zlj.biz.StuBiz; import com.zlj.mapper.StuMapper; import com.zlj.model.Stu; import com.zlj.util.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * @author zlj * @create 2023-09-08 14:52 */ @Service public class StuBizImpl implements StuBiz { @Autowired private StuMapper stuMapper; @Override public int deleteByPrimaryKey(Integer sid) { return stuMapper.deleteByPrimaryKey(sid); } @Override public int insert(Stu record) { return stuMapper.insert(record); } @Override public int insertSelective(Stu record) { return stuMapper.insertSelective(record); } @Override public Stu selectByPrimaryKey(Integer sid) { return stuMapper.selectByPrimaryKey(sid); } @Override public int updateByPrimaryKeySelective(Stu record) { return stuMapper.updateByPrimaryKeySelective(record); } @Override public int updateByPrimaryKey(Stu record) { return stuMapper.updateByPrimaryKey(record); } @Override public List<Stu> ListPager(Stu stu, PageBean pageBean) { return stuMapper.selectByCon(stu); } }
package com.zlj.web; import com.zlj.biz.StuBiz; import com.zlj.model.Stu; import com.zlj.util.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 zlj * @create 2023-09-08 16:55 */ @Controller @RequestMapping("/stu") public class StuController { @Autowired private StuBiz stuBiz; // 增 @RequestMapping("/add") public String add(Stu stu,HttpServletRequest request) { int i = stuBiz.insert(stu); return "redirect:list"; } // 删 @RequestMapping("/del/{sid}") public String del(@PathVariable("sid") Integer sid) { stuBiz.deleteByPrimaryKey(sid); return "redirect:/stu/list"; } // 改 @RequestMapping("/edit") public String edit(Stu stu) { stuBiz.updateByPrimaryKeySelective(stu); return "redirect:list"; } // 查 @RequestMapping("/list") public String list(Stu stu, HttpServletRequest request) { //stu是用来接收前台传递后台的参数 PageBean pageBean = new PageBean(); pageBean.setRequest(request); List<Stu> stus = stuBiz.ListPager(stu, pageBean); request.setAttribute("lst", stus); request.setAttribute("pageBean", pageBean); // WEB-INF/jsp/stu/list.jsp return "stu/list"; } //数据回显 @RequestMapping("/preSave") public String preSave(Stu stu, Model model) { if (stu != null && stu.getSid() != null && stu.getSid() != 0) { Stu s = stuBiz.selectByPrimaryKey(stu.getSid()); model.addAttribute("s", s); } return "stu/edit"; } }
<%@ page language="java" pageEncoding="UTF-8"%> <%@include file="/common/header.jsp"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>博客的编辑界面</title> </head> <body> <form action="${ctx }${empty s ? 'add' : 'edit'}" method="post"> 学生id:<input type="text" name="sid" value="${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> 学生图片:<input type="text" name="spic" value="${s.spic }"><br> <input type="submit"> </form> </body> </html>
//list.jsp <%@ page language="java" pageEncoding="UTF-8"%> <%@include file="/common/header.jsp"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>学生信息</title> </head> <body> <form class="form-inline" action="${ctx}/stu/list" method="post"> <div class="form-group mb-2"> <input type="text" class="form-control-plaintext" name="sname" placeholder="请输入学生姓名"> <!-- <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="${ctx}/stu/preSave">新增</a> </form> <table class="table table-striped"> <thead> <tr> <th scope="col">学生id</th> <th scope="col">学生姓名</th> <th scope="col">学生年龄</th> <th scope="col">学生图片</th> <th scope="col">操作</th> </tr> </thead> <tbody> <c:forEach var="s" items="${lst }"> <tr> <td>${s.sid }</td> <td>${s.sname }</td> <td>${s.sage }</td> <td>${s.spic }</td> <td> <a href="${ctx}/stu/preSave?sid=${s.sid}">修改</a> <a href="${ctx}/stu/del/${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> </body> </html>
<%-- Created by IntelliJ IDEA. User: 朱 Date: 2023/9/8 Time: 23:47 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> 博客列表 </body> </html>
