SprimgMVC增删改查·
1.项目创建
在IDEA创建一个maven项目
2.项目依赖
pom.xml
4.0.0
org.example
lzxzyssm
war
1.0-SNAPSHOT
lzxzyssmMaven Webapp
http://maven.apache.org
UTF-8
1.8
1.8
3.7.0
5.0.2.RELEASE
3.4.5
5.1.44
5.1.2
1.3.1
2.1.1
2.4.3
2.9.1
3.2.0
1.7.13
4.12
4.0.0
1.18.2
1.1.0
2.10.0
2.9.0
1.7.1.RELEASE
2.9.3
1.2
1.1.2
8.0.47
1.3.3
5.0.2.Final
1.3.2
org.springframework
spring-core
${spring.version}
org.springframework
spring-beans
${spring.version}
org.springframework
spring-context
${spring.version}
org.springframework
spring-orm
${spring.version}
org.springframework
spring-tx
${spring.version}
org.springframework
spring-aspects
${spring.version}
org.springframework
spring-web
${spring.version}
org.springframework
spring-test
${spring.version}
org.mybatis
mybatis
${mybatis.version}
mysql
mysql-connector-java
${mysql.version}
com.github.pagehelper
pagehelper
${pagehelper.version}
org.mybatis
mybatis-spring
${mybatis.spring.version}
org.springframework
spring-context-support
${spring.version}
org.mybatis.caches
mybatis-ehcache
${mybatis.ehcache.version}
net.sf.ehcache
ehcache
${ehcache.version}
redis.clients
jedis
${redis.version}
org.springframework.data
spring-data-redis
${redis.spring.version}
com.fasterxml.jackson.core
jackson-databind
${jackson.version}
com.fasterxml.jackson.core
jackson-core
${jackson.version}
com.fasterxml.jackson.core
jackson-annotations
${jackson.version}
org.apache.commons
commons-dbcp2
${commons.dbcp2.version}
commons-pool2
org.apache.commons
org.apache.commons
commons-pool2
${commons.pool2.version}
org.springframework
spring-webmvc
${spring.version}
org.slf4j
slf4j-api
${slf4j.version}
org.slf4j
jcl-over-slf4j
${slf4j.version}
runtime
org.apache.logging.log4j
log4j-api
${log4j2.version}
org.apache.logging.log4j
log4j-core
${log4j2.version}
org.apache.logging.log4j
log4j-slf4j-impl
${log4j2.version}
org.apache.logging.log4j
log4j-web
${log4j2.version}
runtime
com.lmax
disruptor
${log4j2.disruptor.version}
junit
junit
${junit.version}
javax.servlet
javax.servlet-api
${servlet.version}
provided
org.projectlombok
lombok
${lombok.version}
provided
jstl
jstl
${jstl.version}
taglibs
standard
${standard.version}
org.apache.tomcat
tomcat-jsp-api
${tomcat-jsp-api.version}
commons-fileupload
commons-fileupload
${commons-fileupload.version}
org.hibernate
hibernate-validator
${hibernate-validator.version}
org.apache.shiro
shiro-core
${shiro.version}
org.apache.shiro
shiro-web
${shiro.version}
org.apache.shiro
shiro-spring
${shiro.version}
lzxzyssm
src/main/java
**/*.xml
src/main/resources
*.properties
*.xml
org.apache.maven.plugins
maven-compiler-plugin
${maven.compiler.plugin.version}
${maven.compiler.source}
${maven.compiler.target}
${project.build.sourceEncoding}
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
mysql
mysql-connector-java
${mysql.version}
true
maven-clean-plugin
3.1.0
maven-resources-plugin
3.0.2
maven-compiler-plugin
3.8.0
maven-surefire-plugin
2.22.1
maven-war-plugin
3.2.2
maven-install-plugin
2.5.2
maven-deploy-plugin
2.8.2
web.xml
Archetype Created Web Application
contextConfigLocation
classpath:spring-context.xml
org.springframework.web.context.ContextLoaderListener
encodingFilter
org.springframework.web.filter.CharacterEncodingFilter
true
encoding
UTF-8
encodingFilter
/*
SpringMVC
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:spring-mvc.xml
1
true
SpringMVC
/
3.配置文件
generatorConfig.xml
数据库配置文件： jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456spring-mybatis.xml
helperDialect=mysql
spring-context.xml
spring-mvc-xml:
4.后端代码
分页功能
PageBean
package com.liao.utils;
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 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 getMap() {
return map;
}
public void setMap(Map 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
+ "]";
}
} PageTag
package com.liao.tag;
import com.liao.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("");
// 分页条
sb.append("");
// 分页执行的JS代码
sb.append("");
return sb.toString();
}
}tld
liao 1.1 core library
liao core
1.1
liao
http://jsp.veryedu.cn
page
com.liao .tag.PageTag
JSP
pageBean
true
true
编写业务逻辑层（增删改查方法）
在UserMapper.xml中新建一条查询sql
UserMapper接口方法
List listPager(User user); 业务逻辑层接口
package com.liao.biz;
import com.liao.model.User;
import com.liao.utils.PageBean;
import java.util.List;
public interface UserBiz {
int deleteByPrimaryKey(Long id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Long id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
List listPager(User user, PageBean page);
} 实现接口
package com.liao.biz.impl;
import com.liao.biz.UserBiz;
import com.liao.mapper.UserMapper;
import com.liao.model.User;
import com.liao.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserBizImpl implements UserBiz {
@Autowired
private UserMapper userMapper;
@Override
public int deleteByPrimaryKey(Long id) {
return userMapper.deleteByPrimaryKey(id);
}
@Override
public int insert(User record) {
return userMapper.insert(record);
}
@Override
public int insertSelective(User record) {
return userMapper.insertSelective(record);
}
@Override
public User selectByPrimaryKey(Long id) {
return userMapper.selectByPrimaryKey(id);
}
@Override
public int updateByPrimaryKeySelective(User record) {
return userMapper.updateByPrimaryKeySelective(record);
}
@Override
public int updateByPrimaryKey(User record) {
return userMapper.updateByPrimaryKey(record);
}
@Override
public List listPager(User user, PageBean page) {
return userMapper.listPager(user);
}
} .编写切面
package com.liao.aspect;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liao.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;
@Aspect
@Component
public class PageAspect {
@Around("execution(* *..*Biz.*Pager(..))")
public Object invoke(ProceedingJoinPoint args) throws Throwable {
PageBean pageBean = null;
Object[] args1 = args.getArgs();
for (Object param:args1) {
if (param instanceof PageBean){
pageBean = (PageBean) param;
break;
}
}
if(pageBean!=null && pageBean.isPagination())
PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
Object proceed = args.proceed();
if(pageBean!=null && pageBean.isPagination()){
PageInfo info = new PageInfo((List) proceed);
pageBean.setTotal((int) info.getTotal());
}
return proceed;
}
}web层控制器
package com.liao.web;
import com.liao.biz.UserBiz;
import com.liao.model.User;
import com.liao.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
/**
* @author 云村小威
* @site blog.csdn.net/Justw320
* @create 2023-09-08 11:56
*/
@Controller
@RequestMapping("/users")
public class UserController {
@Autowired
private UserBiz userBiz;
/*新增方法*/
@RequestMapping("/add")
public String save(User user, HttpServletRequest request) {
userBiz.insertSelective(user);
return "redirect:list";
}
/*删除方法*/
@RequestMapping("/del/{id}")
public String del(@PathVariable("id") Long id, HttpServletRequest request) {
userBiz.deleteByPrimaryKey(id);
return "redirect:/users/list";
}
/*修改方法*/
@RequestMapping("/edit")
public String edit(User user, HttpServletRequest request) {
userBiz.updateByPrimaryKeySelective(user);
return "redirect:list";
}
/*查询方法*/
@GetMapping("/list")
public ModelAndView list(User user, HttpServletRequest request) {
PageBean pageBean = new PageBean();
pageBean.setRequest(request);
List users = userBiz.listPager(user, pageBean);
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("users", users);
modelAndView.addObject("pageBean", pageBean);
modelAndView.setViewName("user/list");
return modelAndView;
}
/*数据回显*/
@RequestMapping("/preSave")
public String preSave(User user, HttpServletRequest request) {
if (user != null && user.getId() != null && user.getId() != 0) {
User u = userBiz.selectByPrimaryKey(user.getId());
request.setAttribute("u", u);
}
return "user/edit";
}
} 5.前端代码
list.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="z" uri="http://jsp.veryedu.cn" %>
博客列表
用户ID
用户名
账号
密码
权限
${u.id }
${u.name }
${u.loginname }
${u.pwd }
${u.rid }
修改
删除
edit.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
用户编辑、新增公共页面