struts mysql 增删改查_struts2增删改查
1、導入相關的依賴：struts、自定義標簽庫
配置pom.xml
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
4.0.0
com
strtus
war
0.0.1-SNAPSHOT
strtus Maven Webapp
http://maven.apache.org
junit
junit
4.12
test
mysql
mysql-connector-java
5.1.44
javax.servlet
javax.servlet-api
4.0.1
provided
javax.servlet
javax.servlet-api
4.0.1
provided
org.apache.struts
struts2-core
2.5.16
jstl
jstl
1.2
taglibs
standard
1.1.2
org.apache.tomcat
tomcat-jsp-api
8.0.47
struts
org.apache.maven.plugins
maven-compiler-plugin
3.7.0
1.8
1.8
UTF-8
分頁：
package com.util;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
public class PageBean {
private int page = 1;// 頁碼
private int rows = 10;// 行數/頁大小
private int total = 0;// 總記錄數
private boolean pagination = true;// 默認分頁
private String url;// 上一次請求的地址
private Map parameterMap;// 上一次請求的所有參數
public PageBean() {
super();
}
/**
* 對分頁bean進行初始化
*
* @param request
*/
public void setRequest(HttpServletRequest request) {
// 公共參數
this.setPage(request.getParameter("page"));
this.setRows(request.getParameter("rows"));
this.setPagination(request.getParameter("pagination"));
// 請求地址和請求參數
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 getParameterMap() {
return parameterMap;
}
public void setParameterMap(Map 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;
}
}
/**
* 下一頁
*
* @return
*/
public int getNextPage() {
int nextPage = page + 1;
if (nextPage > this.getMaxPage()) {
nextPage = this.getMaxPage();
}
return nextPage;
}
/**
* 上一頁
*
* @return
*/
public int getPreviousPage() {
int previousPage = page - 1;
if (previousPage < 1) {
previousPage = 1;
}
return previousPage;
}
/**
* 最大頁碼
*
* @return
*/
public int getMaxPage() {
return total % rows == 0 ? total / rows : total / rows + 1;
}
/**
* 起始記錄的下標
*
* @return
*/
public int getStartIndex() {
return (page - 1) * rows;
}
@Override
public String toString() {
return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
}
}
Dao層：
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{
public List 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層調用數據返回給前臺
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{
private Clazz clz=new Clazz();
private ClazzDao clzDao=new ClazzDao();
public String list(){
PageBean pageBean =new PageBean();
pageBean.setRequest(request);
try {
List 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";
}
/**
* 跳轉編輯頁面
* @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
/p>
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
/clzList.jsp
/Edit.jsp
/clz_list
JSP
clzList.jsp
pageEncoding="UTF-8"%>
Insert title here小說目錄
method="post">
書名：
value="確定">
增加
| 編號 | 班級名稱 | 老師 | 班級圖片 | |
| ${b.cid } | ${b.cname } | ${b.cteacher } | ${b.pic } | href="${pageContext.request.contextPath}/sy/clz_preSave.action?cid=${b.cid}">修改 href="${pageContext.request.contextPath}/sy/clz_del.action?cid=${b.cid}">刪除 href="${pageContext.request.contextPath}/sy/clz_preUpload.action?cid=${b.cid}">圖片上傳 |
edit.jsp
Insert title herecid:cname:
cteacher:
總結
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