1、导入相关的依赖：struts、自定义标签库
配置pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com</groupId>
<artifactId>strtus</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>strtus Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.5.16</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jsp-api</artifactId>
<version>8.0.47</version>
</dependency>
</dependencies>
<build>
<finalName>struts</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
分页：
package com.util;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
public class PageBean {
private int page = 1;// 页码
private int rows = 10;// 行数/页大小
private int total = 0;// 总记录数
private boolean pagination = true;// 默认分页
private String url;// 上一次请求的地址
private Map<String, String[]> parameterMap;// 上一次请求的所有参数
public PageBean() {
super();
}
/**
* 对分页bean进行初始化
*
* @param request
*/
public void setRequest(HttpServletRequest request) {
// 公共参数
this.setPage(request.getParameter("page"));
this.setRows(request.getParameter("rows"));
this.setPagination(request.getParameter("pagination"));
// 请求地址和请求参数
this.setUrl(request.getContextPath() + request.getServletPath());
this.setParameterMap(request.getParameterMap());
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public Map<String, String[]> getParameterMap() {
return parameterMap;
}
public void setParameterMap(Map<String, String[]> parameterMap) {
this.parameterMap = parameterMap;
}
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 pagination;
}
public void setPagination(boolean pagination) {
this.pagination = pagination;
}
public void setPagination(String pagination) {
if ("false".equals(pagination)) {
this.pagination = false;
}
}
/**
* 下一页
*
* @return
*/
public int getNextPage() {
int nextPage = page + 1;
if (nextPage > this.getMaxPage()) {
nextPage = this.getMaxPage();
}
return nextPage;
}
/**
* 上一页
*
* @return
*/
public int getPreviousPage() {
int previousPage = page - 1;
if (previousPage < 1) {
previousPage = 1;
}
return previousPage;
}
/**
* 最大页码
*
* @return
*/
public int getMaxPage() {
return total % rows == 0 ? total / rows : total / rows + 1;
}
/**
* 起始记录的下标
*
* @return
*/
public int getStartIndex() {
return (page - 1) * rows;
}
@Override
public String toString() {
return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
}
}
Dao层：
ClazzDao
package com.dao;
import java.util.List;
import com.entity.Clazz;
import com.util.BaseDao;
import com.util.PageBean;
import com.util.StringUtils;
public class ClazzDao extends BaseDao<Clazz>{
public List<Clazz> list(Clazz clz, PageBean pageBean) throws InstantiationException, IllegalAccessException{
String sql="select * from t_strtus_class";
String cname=clz.getCname();
if (StringUtils.isNotBlank(cname)) {
sql+=" and cname like '%"+cname+"%'";
}
return super.executeQuery(sql, pageBean,Clazz.class);
}
public int add(Clazz clazz) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
String sql="insert into t_struts_class values(?,?,?,?)";
return super.executeupdate(sql, new String[] {"cid","cname","cteacher","pic"}, clazz);
}
public int del(Clazz clazz) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
String sql="delete from t_struts_class where cid=?";
return super.executeupdate(sql, new String[] {"cid"}, clazz);
}
public int edit(Clazz clazz) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
String sql="update t_struts_class set cname=?,cteacher=?,pic=?";
return super.executeupdate(sql, new String[] {"cname","cteacher","pic","cid"}, clazz);
}
}
web层调用数据返回给前台
package com.web;
import java.sql.SQLException;
import java.util.List;
import com.dao.ClazzDao;
import com.entity.Clazz;
import com.util.BaseAction;
import com.util.PageBean;
import com.opensymphony.xwork2.ModelDriven;
public class ClazzAction extends BaseAction implements ModelDriven<Clazz>{
private Clazz clz=new Clazz();
private ClazzDao clzDao=new ClazzDao();
public String list(){
PageBean pageBean =new PageBean();
pageBean.setRequest(request);
try {
List<Clazz> list = this.clzDao.list(clz, pageBean);
request.setAttribute("clzList",list);
request.setAttribute("pageBean",pageBean);
} catch (InstantiationException | IllegalAccessException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "list";
}
/**
* 跳转编辑页面
* @return
*/
public String preSave() {
if(clz.getCid()!=0) {
try {
this.result= this.clzDao.list(clz, null).get(0);
} catch (InstantiationException | IllegalAccessException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return "preSave";
}
public String add() {
try {
this.code= this.clzDao.add(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
public String edit() {
try {
this.clzDao.edit(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
public String del() {
try {
this.clzDao.del(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
@Override
public Clazz getModel() {
// TODO Auto-generated method stub
return clz;
}
}
配置strtus-sy.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<package name="sy" extends="base" >
<action name="/clz_*" class="com.web.ClazzAction" method="{1}">
<result name="list">/clzList.jsp</result>
<result name="preSave">/Edit.jsp</result>
<result name="toList" type="redirectAction">/clz_list</result>
</action>
</package>
</struts>
JSP
clzList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="z" uri="/lingerqi"%>
<!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>Insert title here</title>
</head>
<body>
<h2>小说目录</h2>
<br>
<form action="${pageContext.request.contextPath}/sy/clz_list.action"
method="post">
书名：<input type="text" name="bname"> <input type="submit"
value="确定">
</form>
<a href="${pageContext.request.contextPath}/sy/clz_preSave.action">增加</a>
<table border="1" width="100%">
<tr>
<td>编号</td>
<td>班级名称</td>
<td>老师</td>
<td>班级图片</td>
</tr>
<c:forEach items="${clzList }" var="b">
<tr>
<td>${b.cid }</td>
<td>${b.cname }</td>
<td>${b.cteacher }</td>
<td>${b.pic }</td>
<td><a
href="${pageContext.request.contextPath}/sy/clz_preSave.action?cid=${b.cid}">修改</a>
<a
href="${pageContext.request.contextPath}/sy/clz_del.action?cid=${b.cid}">删除</a>
<a
href="${pageContext.request.contextPath}/sy/clz_preUpload.action?cid=${b.cid}">图片上传</a>
</td>
</tr>
</c:forEach>
</table>
<z:page pageBean="${pageBean }"></z:page>
</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>Insert title here</title> </head> <body> <form action="${pageContext.request.contextPath}${result.cname == null ? '/sy/clz_add.action' : '/sy/clz_edit.action'}" method="post"> cid:<input type="text" value="${result.cid }" name="cid"><br> cname:<input type="text" value="${result.cname }" name="cname"><br> cteacher:<input type="text" value="${result.cteacher }" name="cteacher"><br> <input type="submit" value="ok"> </form> </body> </html>
