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JAVA中SSM框架的搭建實(shí)現(xiàn)CRUD的方法

 更新時(shí)間：2017年11月27日 17:30:09   投稿：laozhang  
這篇文章主要介紹了JAVA中SSM框架的搭建實(shí)現(xiàn)CRUD的方法，小編把運(yùn)行代碼列了出來，供大家參考。

最近在開發(fā)公司的一個(gè)系統(tǒng)，系統(tǒng)的框架是用ssm的框架搭建的，當(dāng)然和這次寫博客的不一樣，它擁有很多的配置文件，企業(yè)級的開發(fā)所需要的配置文件是非常繁瑣的，今天記錄一下一個(gè)簡單的SSM框架的搭建和實(shí)現(xiàn)一個(gè)CRUD的操作。

使用的是Maven插件來配置我們需要的jar包，由于操作不多，所以并沒有配置很多，要注意自己使用的jdk的版本，選擇不同版本號的jdk

<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.lr</groupId>
 <artifactId>ssm</artifactId>
 <packaging>war</packaging>
 <version>0.0.1-SNAPSHOT</version>
 <name>ssm Maven Webapp</name>
 <url>http://maven.apache.org</url>
 <!-- 用來設(shè)置版本號 --> 
  <properties> 
    <srping.version>4.0.2.RELEASE</srping.version> 
    <mybatis.version>3.2.8</mybatis.version> 
    <slf4j.version>1.7.12</slf4j.version> 
    <log4j.version>1.2.17</log4j.version> 
  </properties> 
  <!-- 用到的jar包 --> 
  <dependencies> 
    <!-- 單元測試 --> 
    <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>4.11</version> 
      <!-- 表示開發(fā)的時(shí)候引入，發(fā)布的時(shí)候不會(huì)加載此包 --> 
      <scope>test</scope> 
    </dependency> 
    <!-- java ee包 --> 
    <dependency> 
      <groupId>javax</groupId> 
      <artifactId>javaee-api</artifactId> 
      <version>7.0</version> 
    </dependency> 
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.8</version>
    </dependency>
    
    <!-- spring框架包 start --> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-test</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-core</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-oxm</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-tx</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-jdbc</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-aop</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-context</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-context-support</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-expression</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-orm</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-web</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-webmvc</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-aspects</artifactId> 
      <version>${srping.version}</version> 
    </dependency> 
    <!-- spring框架包 end --> 
    <!-- mybatis框架包 start --> 
    <dependency> 
      <groupId>org.mybatis</groupId> 
      <artifactId>mybatis</artifactId> 
      <version>${mybatis.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.mybatis</groupId> 
      <artifactId>mybatis-spring</artifactId> 
      <version>1.2.2</version> 
    </dependency> 
    <!-- mybatis框架包 end --> 
    <!-- 數(shù)據(jù)庫驅(qū)動(dòng) --> 
    <dependency> 
      <groupId>mysql</groupId> 
      <artifactId>mysql-connector-java</artifactId> 
      <version>5.1.35</version> 
    </dependency> 
    <!-- 導(dǎo)入dbcp的jar包，用來在applicationContext.xml中配置數(shù)據(jù)庫 --> 
    <dependency> 
      <groupId>commons-dbcp</groupId> 
      <artifactId>commons-dbcp</artifactId> 
      <version>1.4</version> 
    </dependency> 
    <!-- jstl標(biāo)簽類 --> 
    <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> 
    <!-- log start --> 
    <dependency> 
      <groupId>log4j</groupId> 
      <artifactId>log4j</artifactId> 
      <version>${log4j.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-api</artifactId> 
      <version>${slf4j.version}</version> 
    </dependency> 
    <dependency> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-log4j12</artifactId> 
      <version>${slf4j.version}</version> 
    </dependency> 
    <!-- log END --> 
    <!-- Json --> 
    <!-- 格式化對象，方便輸出日志 --> 
    <dependency> 
      <groupId>com.alibaba</groupId> 
      <artifactId>fastjson</artifactId> 
      <version>1.2.6</version> 
    </dependency> 
    <dependency> 
      <groupId>org.codehaus.jackson</groupId> 
      <artifactId>jackson-mapper-asl</artifactId> 
      <version>1.9.13</version> 
    </dependency> 
    <!-- 上傳組件包 start --> 
    <dependency> 
      <groupId>commons-fileupload</groupId> 
      <artifactId>commons-fileupload</artifactId> 
      <version>1.3.1</version> 
    </dependency> 
    <dependency> 
      <groupId>commons-io</groupId> 
      <artifactId>commons-io</artifactId> 
      <version>2.4</version> 
    </dependency> 
    <dependency> 
      <groupId>commons-codec</groupId> 
      <artifactId>commons-codec</artifactId> 
      <version>1.10</version> 
    </dependency> 
    <!-- 上傳組件包 end --> 
 
    <!-- AL相關(guān)添加 --> 
    <dependency> 
      <groupId>net.sourceforge.jexcelapi</groupId> 
      <artifactId>jxl</artifactId> 
      <version>2.6</version> 
    </dependency> 
    <dependency> 
      <groupId>org.apache.poi</groupId> 
      <artifactId>poi</artifactId> 
      <version>3.8</version> 
    </dependency> 
    <dependency> 
      <groupId>org.apache.poi</groupId> 
      <artifactId>poi-ooxml</artifactId> 
      <version>3.9</version> 
    </dependency> 
    <!-- AL相關(guān)添加 --> 
  </dependencies> 
 
   <build> 
    <finalName>Maven_Project</finalName> 
    <plugins> 
      <plugin> 
        <groupId>org.apache.maven.plugins</groupId> 
        <artifactId>maven-compiler-plugin</artifactId> 
        <version>2.3.2</version> 
        <configuration> 
          <source>1.7</source> 
          <target>1.7</target> 
        </configuration> 
      </plugin> 
    </plugins> 
  </build>  
</project>

然后配置數(shù)據(jù)庫的連接，改成自己的數(shù)據(jù)庫就行了

driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://locahost\:3306/db
username=root
password=root
maxActive=20
maxIdle=20
minIdle=1
maxWait=60000

配置文件spring-dao.xml，Spring會(huì)自動(dòng)查找其下的類

<?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:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.1.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
             
             
  <!-- DAO接口所在包名，Spring會(huì)自動(dòng)查找其下的類 --> 
  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
    <!--basePackage指定要掃描的包，在此包之下的映射器都會(huì)被搜索到。 
     可指定多個(gè)包，包與包之間用逗號或分號分隔--> 
    <property name="basePackage" value="com.lr.dao" /> 
    <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> 
  </bean>             
             
</beans>

配置文件Spring和Mybatis的整合文件

<?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:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-4.0.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
 
  <!-- 引入配置文件 --> 
<context:property-placeholder location="classpath:/jdbc.properties" />
  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/db?useUnicode=true&amp;characterEncoding=utf8" />
    <property name="username" value="root" />
    <property name="password" value="root" />
    <!-- 初始化連接大小 -->
    <property name="initialSize" value="3" /> 
    <!-- 連接池最大數(shù)量 -->
    <property name="maxActive" value="20" />
    <!-- 連接池最大空閑 -->
    <property name="maxIdle" value="20" />
    <!-- 連接池最小空閑 --> 
    <property name="minIdle" value="1" />
    <!-- 獲取連接最大等待時(shí)間 --> 
    <property name="maxWait" value="60000" />
  </bean> 
 
  <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 --> 
  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 
    <property name="dataSource" ref="dataSource" /> 
    <!-- 自動(dòng)掃描mapping.xml文件 --> 
    <property name="mapperLocations" value="classpath:com/lr/mapper/*.xml"></property> 
  </bean> 
   
</beans>

配置事物的文件

<?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:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:aop="http://www.springframework.org/schema/aop" 
  xmlns:tx="http://www.springframework.org/schema/tx" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.1.xsd  
            http://www.springframework.org/schema/aop  
            http://www.springframework.org/schema/aop/spring-aop-3.1.xsd 
            http://www.springframework.org/schema/tx 
            http://www.springframework.org/schema/tx/spring-tx-3.1.xsd"> 
 
  <!-- (事務(wù)管理)transaction manager, use JtaTransactionManager for global tx --> 
  <bean id="transactionManager" 
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
    <property name="dataSource" ref="dataSource" /> 
  </bean> 
   
   <!-- 配置參與事務(wù)的類 --> 
   <aop:config> 
     <aop:pointcut id="allServiceMethod" expression="execution(* com.lr.service.*.*(..))"/> 
     <aop:advisor pointcut-ref="allServiceMethod" advice-ref="txAdvice" /> 
   </aop:config> 
   
  <!-- 使用聲明方式配置事務(wù) --> 
  <tx:advice id="txAdvice" transaction-manager="transactionManager"> 
     <tx:attributes> 
        <tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> 
     </tx:attributes> 
  </tx:advice> 
   
</beans>

配置Springmvc.xml文件

<?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:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.1.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
   
  <!-- 自動(dòng)掃描 --> 
  <context:component-scan base-package="com.lr.controller" /> 
   
  <mvc:annotation-driven /> 
  
  <mvc:default-servlet-handler/>
  
  <!-- 定義跳轉(zhuǎn)的文件的前后綴 ，視圖模式配置--> 
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    
    <property name="prefix" value="/WEB-INF/jsp/" /> 
    <property name="suffix" value=".jsp" /> 
  </bean>

好了！??！需要配置的文件已經(jīng)配置完成了，足夠我們進(jìn)行一波操作了

接下來是后臺的一些代碼，這里主要是實(shí)體類，dao層，service層，controller層，我把后臺的文件一起上傳了，mapper.xml文件是實(shí)現(xiàn)方法最關(guān)鍵的地方

<?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.lr.dao.IUserDao">
  <resultMap id="BaseResultMap" type="com.lr.dto.User">
    <result column="id" property="id" jdbcType="INTEGER" /> 
    <result column="name" property="name" jdbcType="VARCHAR" /> 
    <result column="password" property="password" jdbcType="VARCHAR" /> 
    <result column="age" property="age" jdbcType="INTEGER" /> 
  </resultMap>
  
  <sql id="Base_Column_List"> 
    id, name, password, age 
  </sql> 
  
  
   <!--  增加用戶 -->
   <insert id="addUser" parameterType="com.lr.dto.User">
    insert into user(name,password,age) values(#{name},#{password},#{age})
  </insert>
  
   <!-- 查詢用戶--> 
  <select id="queryByPrimaryKey" resultMap="BaseResultMap" 
    parameterType="java.lang.Integer"> 
    select 
    <include refid="Base_Column_List" /> 
    from user 
    where id = #{id} 
  </select> 
  
  
   <!-- 刪除用戶 --> 
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer"> 
    delete from user 
    where id = #{id}  
  </delete> 
  
  
  <!-- 更新用戶 --> 
  <update id="updateByPrimaryKey" parameterType="com.lr.dto.User" >  
    update user set name=#{name},password=#{password},age=#{age} where id=#{id}
  </update> 
  
  <select id="findallUser" resultType="com.lr.dto.User">
    select * from user
  </select>
  
</mapper>
package com.lr.dao;

import java.util.List;

import com.lr.dto.User;

public interface IUserDao {
   //查詢用戶 
  public User queryByPrimaryKey(int id); 
   //刪除用戶 
  public int deleteByPrimaryKey(int id); 
  //更新用戶
  public int updateByPrimaryKey(User user);
  //添加用戶
  public int addUser(User user);
  //查詢所有用戶
  public List<User> findallUser();
}
package com.lr.service;

import java.util.List;

import com.lr.dto.User;

public interface IUserService {
  //查詢用戶 
   public User getUserById(int userId);
   //刪除
   public void deleteUser(int id);
   //更新用戶
   public void updateUser(User user);
  //添加用戶
   public void addUser(User user);
   //查看所有用戶
   public List<User> findallUser();
}
package com.lr.service.Impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.lr.dao.IUserDao;
import com.lr.dto.User;
import com.lr.service.IUserService;
@Service("userService")
public class UserServiceImpl implements IUserService{
  @Resource
  private IUserDao userdao;
  
  public IUserDao getUserdao() {
    return userdao;
  }
  public void setUserdao(IUserDao userdao) {
    this.userdao = userdao;
  }
  //查詢用戶
  @Override
  public User getUserById(int userId) {
    
    return userdao.queryByPrimaryKey(userId);
  }
  //更新用戶
  @Override
  public void updateUser(User user) {
    userdao.updateByPrimaryKey(user);
    
  }
  //刪除用戶
  @Override
  public void deleteUser(int id) {
    
    userdao.deleteByPrimaryKey(id);
  }
  
  //添加用戶
  @Override
  public void addUser(User user) {
    
    userdao.addUser(user);
  }
  
  //查詢所有用戶
  @Override
  public List<User> findallUser() {
    
    return userdao.findallUser();
  }
}
package com.lr.controller;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.lr.dto.User;
import com.lr.service.IUserService;

@Controller
public class UserController {
  @Autowired
  private IUserService userService;
  
  public IUserService getUserService() {
    return userService;
  }
  public void setUserService(IUserService userService) {
    this.userService = userService;
  } 
  
  //主頁面
  @RequestMapping("/")
  public String userMgr() {
    return "showUser";
  }
  
  //添加用戶
  @RequestMapping("/addUser")
  @ResponseBody
  public void userAdd(User user) {
    userService.addUser(user);
  }
  
  //刪除用戶
  @RequestMapping("/deleteUser")
  @ResponseBody
  public void deleteUser(int id){
    userService.deleteUser(id);
  }
  
  //修改用戶
  @RequestMapping("/updateUser")
  @ResponseBody
  public void upadteUser(User user){
    
    userService.updateUser(user);
    
  }
  //根據(jù)id查找用戶
  @RequestMapping("/showUser") 
  @ResponseBody
  public User showUser(int id,Model model){ 
     return userService.getUserById(id);     
  }
  
  //查詢所有用戶
  @RequestMapping("/findallUser")
  @ResponseBody
  public List<User> findallUser(){
    return userService.findallUser();
  }
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML>
<html>
 <head>  
  <meta charset="utf-8"><script type="text/javascript" src="<%= application.getContextPath() %>/js/jquery-1.12.4.min.js"></script>
  <script type="text/javascript">
  
  
  
  //添加用戶
    $(function(){
      $("#add").on("click", addNewUser);    
    })
    function addNewUser(){
      var name = $.trim($("#txtName").val());
      var password = $.trim($("#txtPassword").val());
      var age = $.trim($("#txtAge").val());
      
      $.post("/ssm/addUser", {"name": name, "password": password, "age": age}, function(){
        alert("添加成功！")
      });
    }
    
    
    
  //刪除用戶
    $(function(){
      $("#delete").on("click",deleteUser);
    })
    function deleteUser(){
      var id=$.trim($("#deleteid").val());
      $.get("/ssm/deleteUser",{"id":id},function(){
        alert("刪除成功！")
      });
    }
    
    
  //查詢所有用戶
    $(function(){
      $("#findalluser").click(function(){
        $.ajax({
          type:"POST",
          dataType:"json",
          url:"/ssm/findallUser",
          success:function(msg){
            var str="";
            for(i in msg){
              str+="<tr><th>"+msg[i].id+"</th><th>"+msg[i].name+"</th><th>"
              +msg[i].password+"</th><th>"+msg[i].age+"</th><tr>"
            }
            $("#findall").append(str);
          }
        });
      });
    });
    
    
    //根據(jù)id查找一個(gè)用戶
    
    $(function(){
      $("#find").click(function(){
        $.ajax({
          type:"POST",
          data:{id:$("#findid").val()},
          dataType:"json",
          url:"/ssm/showUser",
          success:function(user){
            var str="";
              str+="<tr><th>"+user.id+"</th><th>"+user.name+"</th><th>"
              +user.password+"</th><th>"+user.age+"</th><tr>"
            $("#finduserbyid").append(str);
          }
          
        })
      })
    })
    
    
    //根據(jù)id修改用戶信息
    $(function(){
      $("#update").on("click",updateUser);
    })
    function updateUser(){
       alert($.trim($("#updateid").val()))
      alert($.trim($("#updatename").val()))
      alert($.trim($("#updatepassword").val()))
      alert($.trim($("#updateage").val())) 
    
      var id=$.trim($("#updateid").val());
      var name=$.trim($("#updatename").val());
      var password=$.trim($("#updatepassword").val());
      var age=$.trim($("#updateage").val());
      $.post("/ssm/updateUser",{"id":id,"name":name,"password":password,"age":age},function(){
        alert("修改成功！")
      });
    }
  </script>
  
  
 <title>用戶管理</title>  
 </head>
 <body>
  <div>
    <p>姓名：<input type="text" id="txtName"></p>
    <p>密碼：<input type="password" id="txtPassword"></p>
    <p>年齡：<input type="text" id="txtAge"></p>
    <p><button id="add">添加</button></p>
  </div>
  <hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
  
  <div>
    <p>輸入用戶id:<input type="text" id="deleteid"></p>
    <p><button id="delete">刪除</button></p>
  </div>
  
  <hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
  
  <div><p><button id="findalluser">查詢所有</button></p></div>
  <div>
    <table width="300" border="1" >
      <thead id="findall">
        <tr>
          <th width="50">id</th>
          <th width="50">姓名</th>
          <th width="50">密碼</th>
          <th width="50">年齡</th>
        </tr>
      </thead>
    </table>
  </div>
  <hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
  
  <div>
    <p>輸入用戶id:<input type="text" id="findid"></p>
    <p><button id="find">查詢</button></p>
  </div>
   <div>
    <table width="300" border="1" >
      <thead id="finduserbyid">
        <tr>
          <th width="50">id</th>
          <th width="50">姓名</th>
          <th width="50">密碼</th>
          <th width="50">年齡</th>
        </tr>
      </thead>
    </table>
  </div>
  <hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
  <div>
    <p>輸入用戶id:<input type="text" id="updateid"></p>
    <p>輸入用戶姓名:<input type="text" id="updatename"></p>
    <p>輸入密碼：<input type="password" id="updatepassword"></p>
    <p>輸入用戶年齡:<input type="password" id="updateage"></p>
    <p><button id="update">修改</button></p>
  </div>
 </body>
</html>

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