总结的几点：
1、在jsp中注意<%! %>声明代码块中的变量只会在项目开始的时候第一次运行jsp的时候执行一遍，有点类似于java类中的static代码块，所以如果是会改变的值不应该声明在这里面。而是卸载<%%>代码块中
2、使用js中的location.href有时候就是无法生效，也就是无法跳转到你想要的页面。你可以在location.href语句后面加上 event.returnValue=false即可
3、进行编辑一条信息或者删除信息的时候id字段可以使用隐藏域或者直接使用el传递。这样就不需要通过js找到id列或者其他了
4、在增加的时候注意在servlet或者对应的jsp进行对象的补全
5、在修改的时候如果有那种类似于下拉列表或者单选按钮的东西，可以使用jstl中的<c:if>实现选择。
例子：
CREATE TABLE profile(
id NUMBER PRIMARY KEY,
name VARCHAR2(20),
birthday DATE,
gender VARCHAR2(10),
career VARCHAR2(20),
address VARCHAR2(50),
mobile VARCHAR2(11)
);
CREATE SEQUENCE seq_profile;
package com.dao;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.ResultSetHandler;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import com.domain.Profile;
import com.jdbc.JdbcUtils;
public class ProfileDao {
/**
* zeng
* @param p
* @throws SQLException
*/
public void addProfile(Profile p) throws SQLException{
String sql="INSERT INTO profile VALUES (seq_profile.NEXTVAL,?,?,?,?,?,?)";
QueryRunner qr=new QueryRunner();
Connection con=JdbcUtils.getConnection();
Object[] params={p.getName(),p.getBirthday(),p.getGender(),p.getCareer(),p.getAddress(),p.getMobile()};
qr.update(con, sql,params);
JdbcUtils.releaseConnection(con);
}
public void deleteById(int id) throws SQLException{
String sql="DELETE FROM profile WHERE id=?";
QueryRunner qr=new QueryRunner();
Connection con=JdbcUtils.getConnection();
Object[] params={id};
qr.update(con,sql, params);
JdbcUtils.releaseConnection(con);
}
public void update(Profile p) throws SQLException{
String sql="UPDATE profile SET name=?,birthday=?,gender=?,career=?,address=?,mobile=? WHERE id=?";
QueryRunner qr=new QueryRunner();
Connection con=JdbcUtils.getConnection();
Object[] params={p.getName(),p.getBirthday(),p.getGender(),p.getCareer(),p.getAddress(),p.getMobile(),p.getId()};
// System.out.println(Arrays.toString(params));
qr.update(con,sql, params);
JdbcUtils.releaseConnection(con);
}
public ArrayList<Profile> findAll() throws SQLException{
String sql="SELECT * FROM profile";
QueryRunner qr=new QueryRunner();
Connection con=JdbcUtils.getConnection();
ResultSetHandler<List<Profile>> rsh=new BeanListHandler<Profile>(Profile.class);
ArrayList<Profile> profiles=(ArrayList<Profile>) qr.query(con, sql, rsh);
JdbcUtils.releaseConnection(con);
return profiles;
}
public Profile load(int id) throws SQLException{
String sql="SELECT * FROM profile WHERE id=?";
QueryRunner qr=new QueryRunner();
Object[] params={id};
Connection con=JdbcUtils.getConnection();
ResultSetHandler<Profile> rsh=new BeanHandler<Profile>(Profile.class);
Profile profile= (Profile) qr.query(con, sql, rsh,params);
JdbcUtils.releaseConnection(con);
return profile;
}
}
package com.domain;
import java.io.Serializable;
import java.sql.Date;
public class Profile implements Serializable{
private static final long serialVersionUID = 1L;
private int id;
private String name;
private Date birthday;
private String gender;
private String career;
private String address;
private String mobile;
@Override
public String toString() {
return "Profile [id=" + id + ", name=" + name + ", birthday="
+ birthday + ", gender=" + gender + ", career=" + career
+ ", address=" + address + ", mobile=" + mobile + "]";
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getCareer() {
return career;
}
public void setCareer(String career) {
this.career = career;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public Profile() {
super();
// TODO Auto-generated constructor stub
}
public Profile(int id, String name, Date birthday, String gender,
String career, String address, String mobile) {
super();
this.id = id;
this.name = name;
this.birthday = birthday;
this.gender = gender;
this.career = career;
this.address = address;
this.mobile = mobile;
}
}
package com.jdbc;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class JdbcUtils {
/*
* 配置文件的恶魔人配置！要求你必须给出c3p0-config。xnl!
*/
private static ComboPooledDataSource dataSource=new ComboPooledDataSource("oracle-config");
/**
* 它是事务专用连接
*/
private static Connection con=null;
/**
* 使用连接池返回一个连接对象
* @return
* @throws SQLException
*/
public static Connection getConnection() throws SQLException{
//当con！=null，表示已经调用过beginTransaction方法了
if(con!=null) return con;
return dataSource.getConnection();
}
/**
* 返回连接池对象
* @return
*/
public static DataSource getDataSource(){
return dataSource;
}
/**
* 1、开启一个Connection，设置它的setAutoCommit(false)
* 2、还要保证dao中使用的连接是我们刚刚创建的
* ------------------------
* 1、创建一个Connection，设置为手动提交
* 2、把这个Connection给dao用
* 3、还要让commitTransaction或rollbackTransaction可以获取到
* @throws SQLException
*/
public static void beignTransaction() throws SQLException{
if(con!=null) throw new SQLException("已经开始了事务，就不要继续开启事务了！");
con=getConnection();
con.setAutoCommit(false);
}
/**
* 提交事务
* 获取之前开启的Connection，兵提交
* @throws SQLException
*/
public static void commitTransaction() throws SQLException{
if(con==null) throw new SQLException("还没有开启事务，不能提交！");
con.commit();
con.close();
con=null;//因为前面的close()不会销毁连接而是放回连接池
}
/**
* 回滚事务
* 获取之前开启的Connection，兵回滚
* @throws SQLException
*/
public static void rollbackTransaction() throws SQLException{
if(con==null) throw new SQLException("还没有开启事务，不能提交！");
con.rollback();
con.close();
con=null;//因为前面的close()不会销毁连接而是放回连接池
}
public static void releaseConnection(Connection connection) throws SQLException{
/*
*判斷它是不是中事務專用，如果是就不關閉
*如果不是就要關閉
*/
//如果con==null，說明沒有事務，那麼connection一定不是事務專用的
if(con==null) connection.close();
if(con!=connection) connection.close();
}
}
package com.service;
import java.sql.SQLException;
import java.util.ArrayList;
import com.dao.ProfileDao;
import com.domain.Profile;
public class ProfileService {
private ProfileDao profileDao=new ProfileDao();
public void addProfile(Profile p){
try {
profileDao.addProfile(p);
} catch (SQLException e) {
e.printStackTrace();
}
}
public void deleteProfile(int id){
try {
profileDao.deleteById(id);
} catch (SQLException e) {
e.printStackTrace();
}
}
public void updateProfile(Profile p){
try {
profileDao.update(p);
} catch (SQLException e) {
e.printStackTrace();
}
}
public ArrayList<Profile> findAll(){
try {
return profileDao.findAll();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public Profile findById(int id){
try {
return profileDao.load(id);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
package com.test;
import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import org.junit.Test;
import com.domain.Profile;
import com.service.ProfileService;
public class Test01 {
@Test
public void fun1() throws ParseException{
ProfileService ps=new ProfileService();
Profile p=new Profile();
p.setName("liu");
p.setBirthday(geDate("1994-10-12"));
p.setAddress("江西");
p.setGender("女");
p.setMobile("8482973");
p.setCareer("学生");
ps.addProfile(p);
// p.setCareer("工人");
// p.setId(1);
// ps.updateProfile(p);
// System.out.println(ps.findAll());
// System.out.println(ps.findById(1));
}
public Date geDate(String date) throws ParseException{
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
return new Date(sdf.parse(date).getTime());
}
}
<?xml version="1.0" encoding="UTF-8" ?>
<c3p0-config>
<!-- 默认连接配置 -->
<default-config>
<!-- 连接四大参数配置 -->
<property name="jdbcUrl">jdbc:mysql://127.0.0.1:3306/demo</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="user">guodaxia</property>
<property name="password">961012gz</property>
<!-- 池参数配置 -->
<property name="acquireIncrement">3</property>
<property name="initialPoolSize">10</property>
<property name="minPoolSize">2</property>
<property name="maxPoolSize">10</property>
</default-config>
<named-config name="oracle-config">
<!-- 连接四大参数配置 -->
<property name="jdbcUrl">jdbc:oracle:thin:@localhost:1521:db</property>
<property name="driverClass">oracle.jdbc.driver.OracleDriver</property>
<property name="user">scott</property>
<property name="password">961012gz</property>
<property name="acquireIncrement">3</property>
<property name="initialPoolSize">10</property>
<property name="minPoolSize">2</property>
<property name="maxPoolSize">10</property>
</named-config>
</c3p0-config>
$(function(){
$("button[name=‘show‘]").click(function(){
var id=$($(this).parents("tr").find("td")[0]).text();
//alert(id);
window.location.href="detail.jsp?id="+id;
});
$("button[name=‘alert‘]").click(function(){
var id=$($(this).parents("tr").find("td")[0]).text();
//alert(id);
window.location.href="update.jsp?id="+id;
});
$("button[name=‘delete‘]").click(function(){
var id=$($(this).parents("tr").find("td")[0]).text();
//alert(id);
window.location.href="delete.jsp?id="+id;
});
});
$(function(){
$("option").each(function(){
var v1=$("#hhh").val();
var v2=$(this).val();
//alert($("#hhh").val()+" "+$(this).val());
if(v1==v2){
$(this).attr("selected",true);
}
});
$("button[name=‘back‘").click(function(){
//alert(1);
window.location.href="list.jsp?date="+new Date().getTime();
event.returnValue=false;
});
});
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘index.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
response.sendRedirect(path+"/list.jsp");
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.domain.Profile,java.sql.Date,com.service.ProfileService,java.text.SimpleDateFormat" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘list.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
td{
/* width:80px; */
border:1px solid;
}
table{
border:1px solid;
}
#tr1{
background-color: yellow;
}
</style>
<script type="text/javascript" src="js/jquery1.8.3.js"></script>
<script type="text/javascript" src="js/list.js"></script>
</head>
<%
ProfileService ps=new ProfileService();
ArrayList<Profile> profiles=ps.findAll();
%>
<%!
String date2Str(Date d){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(d);
}
%>
<body>
<table>
<tr id="tr1">
<td>编号</td>
<td>姓名</td>
<td>生日</td>
<td>性别</td>
<td>职业</td>
<td>住所</td>
<td>电话</td>
<td>操作</td>
</tr>
<%for(Profile p:profiles){%>
<tr>
<td><%=p.getId() %></td>
<td><%=p.getName() %></td>
<td><%=date2Str(p.getBirthday()) %></td>
<td><%=p.getGender() %></td>
<td><%=p.getCareer() %></td>
<td><%=p.getAddress() %></td>
<td><%=p.getMobile() %></td>
<td>
<button name="show" >明细</button>
<button name="alert" >修改</button>
<button name="delete" >删除</button>
</td>
</tr>
<%
}
%>
</table>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.domain.Profile,java.sql.Date,com.service.ProfileService,java.text.SimpleDateFormat" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘update.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
table{
border:1px solid;
}
td{
border:1px solid;
}
</style>
<script type="text/javascript" src="js/jquery1.8.3.js"></script>
<script type="text/javascript" src="js/update.js"></script>
</head>
<body>
<%!
Profile p=null;
String date2Str(Date d){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(d);
}
%>
<%
Integer i=Integer.valueOf(request.getParameter("id"));
ProfileService ps=new ProfileService();
p=ps.findById(i);
%>
<form action="utu.jsp" method="post">
<table>
<tr>
<td>编号</td>
<td><input name="id" type="text" value="<%=p.getId() %>" readonly></td>
</tr>
<tr>
<td>姓名</td>
<td><input name="name" type="text" value="<%=p.getName() %>" ></td>
</tr>
<tr>
<td>生日</td>
<td><input name="birthday" type="text" value="<%=p.getBirthday() %>" ></td>
</tr>
<tr>
<td>性别</td>
<td>
<select name="gender">
<option value="女">女</option>
<option value="男">男</option>
</select>
<input id="hhh" type="hidden" value="<%=p.getGender() %>">
</td>
</tr>
<tr>
<td>职业</td>
<td><input name="career" type="text" value="<%=p.getCareer() %>" ></td>
</tr>
<tr>
<td>住所</td>
<td><input name="address" type="text" value="<%=p.getAddress() %>" ></td>
</tr>
<tr>
<td>电话</td>
<td><input name="mobile" type="text" value="<%=p.getMobile() %>" ></td>
</tr>
</table>
<input type="submit" value="修改">
<button name="back">返回</button>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.domain.Profile,java.sql.Date,com.service.ProfileService,java.text.SimpleDateFormat,java.text.ParseException" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%!
Date str2Date(String str)throws ParseException{
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
return new Date(sdf.parse(str).getTime());
}
%>
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
int id=Integer.parseInt(request.getParameter("id"));
String name=request.getParameter("name");
Date birthday=str2Date(request.getParameter("birthday"));
String gender=request.getParameter("gender");
String career=request.getParameter("career");
String address=request.getParameter("address");
String mobile=request.getParameter("mobile");
System.out.println(id+"---"+name+"--"+birthday+"--"+gender+"--"+career+"--"+address+"--"+mobile);
Profile p=new Profile();
p.setId(id);
p.setName(name);
p.setBirthday(birthday);
p.setGender(gender);
p.setCareer(career);
p.setAddress(address);
p.setMobile(mobile);
ProfileService ps=new ProfileService();
ps.updateProfile(p);
response.sendRedirect(path+"/update.jsp?id="+id);
%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.domain.Profile,java.sql.Date,com.service.ProfileService,java.text.SimpleDateFormat" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘detail.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
table{
border:1px solid;
}
td{
border:1px solid;
}
</style>
</head>
<%!
Profile p=null;
String date2Str(Date d){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(d);
}
%>
<%
Integer i=Integer.valueOf(request.getParameter("id"));
ProfileService ps=new ProfileService();
p=ps.findById(i);
%>
<body>
<table>
<tr>
<td>编号</td>
<td><%=p.getId() %></td>
</tr>
<tr>
<td>姓名</td>
<td><%=p.getName() %></td>
</tr>
<tr>
<td>生日</td>
<td><%=p.getBirthday() %></td>
</tr>
<tr>
<td>性别</td>
<td><%=p.getGender() %></td>
</tr>
<tr>
<td>职业</td>
<td><%=p.getCareer() %></td>
</tr>
<tr>
<td>住所</td>
<td><%=p.getAddress() %></td>
</tr>
<tr>
<td>电话</td>
<td><%=p.getMobile() %></td>
</tr>
</table>
<button onclick="javascript:history.go(-1)">返回</button>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.domain.Profile,java.sql.Date,com.service.ProfileService,java.text.SimpleDateFormat" %>
<%
int id=Integer.parseInt(request.getParameter("id"));
ProfileService ps=new ProfileService();
ps.deleteProfile(id);
response.sendRedirect(request.getContextPath()+"/list.jsp?date="+System.currentTimeMillis());
%>
jar：
时间： 2024-10-11 15:30:21