- SpringMVC之CRUD(增删改查)
数据库
# 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>
