對於java+idea+ssm新手來講，跑一個demo出來簡直是災難呀。。坑！

1、新建maven專案：

一路next直到建立完成專案，maven自動建立專案會輸出如下資訊：

[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 8.249 s [INFO] Finished at: 2018-09-25T19:35:04+08:00 [INFO] Final Memory: 14M/198M [INFO] ------------------------------------------------------------------------ [INFO] Maven execution finished

2、此時idea該網頁專案已經建立完成，配置tomcat執行試試：點選右上角edit configurations

但是執行的結果是報錯：404。這裡確實還不確定原因，為什麼模板構建出來無法執行。因此做以下修改：

選擇刪除該Web，新建Web，指定Deployment Descriptors與Web Resource Directory為：

D:\workspace\maventest5\src\main\webapp\WEB-INF\web.xml

D:\workspace\maventest5\src\main\webapp

重新啟動tomcat執行得到index.jsp的Hello World！網頁。在此基礎上進行SSM框架的構建。

3、修改maven配置檔案pom.xml自動引入工程所需的jar包，對於oracle的jar包需要特殊處理：

mvn install:install-file -DgroupId=com.oracle -DartifactId=ojdbc6-Dversion=11.2.0.1.0 -Dpackaging=jar-Dfile=D:\app\hanbin\product\11.2.0\dbhome_1\jdbc\lib\ojdbc6.jar 

由於我在maven的conf資料夾下修改了setting.xml檔案：

<localRepository>D:\software\maven\apache-maven-3.3.9\repo</localRepository> 導致安裝的包預設到對應目錄下，而專案對應的reposity資料夾為D:/M2/REPOSITY資料夾內，因此需要將oracle的jar拷到對應的m2資料夾內。

pom.xml如下：

<?xml version="1.0" encoding="UTF-8"?>

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>cn.hb</groupId>
  <artifactId>ssmdemo5</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssmdemo5 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <spring.version>5.0.3.RELEASE</spring.version>
    <mybatis.version>3.4.4</mybatis.version>
  </properties>

  <dependencies>
      <!-- 單元測試 -->
      <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.12</version>
          <scope>test</scope>
      </dependency>
      <!-- 第一部分：Spring 配置-->
      <!-- Spring core -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <!-- Spring DAO -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <!-- Spring mvc -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-test</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <!-- 第二部分：Servlet web -->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.0.1</version>
          <scope>provided</scope>
      </dependency>
      <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.2</version>
          <scope>provided</scope>
      </dependency>
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
      </dependency>
      <dependency>
          <groupId>taglibs</groupId>
          <artifactId>standard</artifactId>
          <version>1.1.2</version>
      </dependency>
      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.9.4</version>
      </dependency>
      <!-- 第三部分：資料庫和mybatis -->
      <!-- 資料庫 -->
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.38</version>
      </dependency>
      <dependency>
          <groupId>com.oracle</groupId>
          <artifactId>ojdbc6</artifactId>
          <version>11.2.0.1.0</version>
      </dependency>
      <!-- 資料庫連線池 -->
      <dependency>
          <groupId>com.mchange</groupId>
          <artifactId>c3p0</artifactId>
          <version>0.9.5.2</version>
      </dependency>
      <!-- MyBatis -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>${mybatis.version}</version>
      </dependency>
      <!-- mybatis-spring整合包 -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.1</version>
      </dependency>
      <!-- 第四部分：日誌 -->
      <!-- 實現slf4j介面並整合 -->
      <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-classic</artifactId>
          <version>1.1.1</version>
      </dependency>



  </dependencies>

  <build>
    <finalName>ssmdemo5</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

注意自己的專案的名稱不要錯誤。引入結束後，應該有如下現象：

4、在main資料夾下新建java、resources資料夾，並依次設定為Sources Root、Resources Root。

在java資料夾下新建package為com及com下controller、dao、pojo、service，依次代表控制器即網頁跳轉相關、資料庫對映、資料庫對應的java實體類、所需的服務。在resource下新建mapper、spring資料夾對應放置mybatis對映檔案與spring配置相關檔案。並且在resource資料夾下新建jdbc.properties、log4j.properties、mybatis-congig.xml對應jdbc的一些配置包括資料庫登入相關的資訊、日誌的設定以及mybatis的設定如駝峰轉換等。在WEB-INF下新建jsp資料夾存放網頁jsp檔案。

jdbc.properties內容如下：

jdbc.driver=oracle.jdbc.driver.OracleDriver
jdbc.url=jdbc:oracle:thin:@localhost:1521:orcl
jdbc.username=test
jdbc.password=123456

注意使用者名稱密碼不要錯誤。

log4j.properties如下：

log4j.rootLogger=ERROR, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

mybatis-congig.xml如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!-- 配置全域性屬性 -->
    <settings>
        <!-- 使用jdbc的getGeneratedKeys獲取資料庫自增主鍵值 -->
        <setting name="useGeneratedKeys" value="true" />

        <!-- 使用列別名替換列名 預設:true -->
        <setting name="useColumnLabel" value="true" />

        <!-- 開啟駝峰命名轉換:Table{create_time} -> Entity{createTime} -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>
</configuration>

開啟駝峰轉化，網上說是避免下劃線“_”的錯誤，目前還沒有遇到。

5、本文部分轉載一下部落格，因此採用的例子與該部落格相同，略有改動。

仿照一個論文管理系統的增刪改查操作。

6、在oracle資料庫建立表

create table PAPER ( PAPER_ID NUMBER(20) not null, PAPERNAME VARCHAR2(100) not null, PAPERNUMBER NUMBER(11) not null, DETAIL VARCHAR2(200) not null )

插入幾條資料：

INSERT INTO paper VALUES (2, '深度學習', 3, 'dldldl'); INSERT INTO paper VALUES (3, '大資料', 4, 'bdbdbd'); 7、在pojo package下新建java實體類Paper，與資料庫表內欄位一一對應：

package com.pojo;

public class Paper {
    private long paperId;
    private String paperName;
    private int paperNum;
    private String paperDetail;

    public long getPaperId() {
        return paperId;
    }

    public void setPaperId(long paperId) {
        this.paperId = paperId;
    }

    public String getPaperName() {
        return paperName;
    }

    public void setPaperName(String paperName) {
        this.paperName = paperName;
    }

    public int getPaperNum() {
        return paperNum;
    }

    public void setPaperNum(int paperNum) {
        this.paperNum = paperNum;
    }

    public String getPaperDetail() {
        return paperDetail;
    }

    public void setPaperDetail(String paperDetail) {
        this.paperDetail = paperDetail;
    }
}

idea內alt+insert選擇自動插入setter和getter，setter和getter是必須的，理由還沒看。。。

8、在dao下新建PaperDao介面類：

package com.dao;

import com.pojo.Paper;

import java.util.List;

public interface PaperDao {
    int addPaper(Paper paper);

    int deletePaperById(long id);

    int updatePaper(Paper paper);

    Paper queryById(long id);

    List<Paper> queryAllPaper();
}

實現對資料庫表的增刪改查基礎操作。

9、此時配置SSM資料庫與DAO的對映，在spring下新建spring-dao.xml並在mapper下新建PapperMapper.xml檔案，完成資料庫的對映。

spring-dao.xml內容為：

<?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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 配置整合mybatis過程 -->
    <!-- 1.配置資料庫相關引數properties的屬性：${url} -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!-- 2.資料庫連線池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 配置連線池屬性 -->
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>

        <!-- c3p0連線池的私有屬性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 關閉連線後不自動commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 獲取連線超時時間 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 當獲取連線失敗重試次數 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!-- 3.配置SqlSessionFactory物件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入資料庫連線池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBaties全域性配置檔案:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!-- 掃描pojo包 使用別名 -->
        <property name="typeAliasesPackage" value="com.pojo"/>
        <!-- 掃描sql配置檔案:mapper需要的xml檔案 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <!-- 4.配置掃描Dao介面包，動態實現Dao介面，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 給出需要掃描Dao介面包 -->
        <property name="basePackage" value="com.dao"/>
    </bean>
</beans>

PapperMapper.xml內容為：

<?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.dao.PaperDao">
    <resultMap type="Paper" id="paperResultMap" >
        <id property="paperId" column="paper_id"/>
        <result property="paperName" column="papername"/>
        <result property="paperNum" column="papernumber"/>
        <result property="paperDetail" column="detail"/>
    </resultMap>
    <insert id="addPaper" parameterType="Paper">
        INSERT INTO paper(paper_id,papername,papernumber,detail) VALUE (#{paperId},#{paperName}, #{paperNum}, #{paperDetail})
    </insert>

    <delete id="deletePaperById" parameterType="long">
        DELETE FROM paper WHERE paper_id=#{paperID}
    </delete>

    <update id="updatePaper" parameterType="Paper">
        UPDATE paper
        SET PAPERNAME = #{paperName},PAPERNUMBER = #{paperNum},detail = #{paperDetail}
        WHERE  paper_id = #{paperId}
    </update>

    <select id="queryById" resultType="Paper" parameterType="long">
        SELECT paper_id,papername,papernumber,detail
        FROM paper
        WHERE paper_id=#{paperId}
    </select>
    <select id="queryAllPaper" resultMap="paperResultMap">
        SELECT paper_id,papername,papernumber,detail
        FROM paper
    </select>

</mapper>

但是注意，mapper中型別轉換的問題。varchar2可以轉換為java中的String。但是number要根據位數來判斷是integer或long，否則會出現其他正常但是始終查詢結果為空的情況。

10、在service下新建PaperService介面類：

package com.service;

import com.pojo.Paper;

import java.util.List;

public interface PaperService {
    int addPaper(Paper paper);

    int deletePaperById(long id);

    int updatePaper(Paper paper);

    Paper queryById(long id);

    List<Paper> queryAllPaper();

}

並在service下新建package  impl並在impl下新建

PaperServiceImpl服務實現類：

package com.service.impl;

import com.dao.PaperDao;
import com.pojo.Paper;
import com.service.PaperService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class PaperServiceImpl implements PaperService {
    @Autowired
    private PaperDao paperDao;

    @Override
    public int addPaper(Paper paper) {
        return paperDao.addPaper(paper);
    }

    @Override
    public int deletePaperById(long id) {
        return paperDao.deletePaperById(id);
    }

    @Override
    public int updatePaper(Paper paper) {
        return paperDao.updatePaper(paper);
    }

    @Override
    public Paper queryById(long id) {
        return paperDao.queryById(id);
    }

    @Override
    public List<Paper> queryAllPaper() {
        return paperDao.queryAllPaper();
    }

}

11、在spring下新建spring-service.xml

<?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:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 掃描service包下所有使用註解的型別 -->
    <context:component-scan base-package="com.service" />

    <!-- 配置事務管理器 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入資料庫連線池 -->
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 配置基於註解的宣告式事務 -->
    <tx:annotation-driven transaction-manager="transactionManager" />
</beans>

12、這樣，可以通過呼叫服務呼叫資料相關的操作。在controller下新建

PaperController類：

package com.controller;

import com.pojo.Paper;
import com.service.PaperService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/paper")
public class PapperController {
    @Autowired
    private PaperService paperService;

    @RequestMapping("/allPaper")
    public String list(Model model) {
        List<Paper> list = paperService.queryAllPaper();
        model.addAttribute("list", list);
        return "allPaper";
    }

    @RequestMapping("toAddPaper")
    public String toAddPaper() {
        return "addPaper";
    }

    @RequestMapping("/addPaper")
    public String addPaper(Paper paper) {
        paperService.addPaper(paper);
        return "redirect:/paper/allPaper";
    }

    @RequestMapping("/del/{paperId}")
    public String deletePaper(@PathVariable("paperId") Long id) {
        paperService.deletePaperById(id);
        return "redirect:/paper/allPaper";
    }

    @RequestMapping("toUpdatePaper")
    public String toUpdatePaper(Model model, Long id) {
        model.addAttribute("paper", paperService.queryById(id));
        return "updatePaper";
    }

    @RequestMapping("/updatePaper")
    public String updatePaper(Model model, Paper paper) {
        paperService.updatePaper(paper);
        paper = paperService.queryById(paper.getPaperId());
        model.addAttribute("paper", paper);
        return "redirect:/paper/allPaper";
    }
}

13、在spring下新建spring-mvc.xml

<?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: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.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    <!-- 配置SpringMVC -->
    <!-- 1.開啟SpringMVC註解模式 -->
    <!-- 簡化配置：
        (1)自動註冊DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter
        (2)提供一些列：資料繫結，數字和日期的format @NumberFormat, @DateTimeFormat, xml,json預設讀寫支援
    -->
    <mvc:annotation-driven />

    <!-- 2.靜態資源預設servlet配置
        (1)加入對靜態資源的處理：js,gif,png
        (2)允許使用"/"做整體對映
     -->
    <mvc:default-servlet-handler/>

    <!-- 3.配置jsp 顯示ViewResolver -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 4.掃描web相關的bean -->
    <context:component-scan base-package="com.controller" />
</beans>

14、修改web.xml配置：

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1" metadata-complete="true">


  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置springMVC需要載入的配置檔案
        spring-dao.xml,spring-service.xml,spring-mvc.xml
        Mybatis - > spring -> springmvc
     -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring/spring-*.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <!-- 預設匹配所有的請求 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>
      org.springframework.web.filter.CharacterEncodingFilter
    </filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

15、至此整個工程構建完畢，構成結構如圖所示：

16、在jsp資料夾下新增allPaper.jsp、addPaper.jsp、updatePaper.jsp三個網頁檔案：

allPaper.jsp：

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2018/4/6
  Time: 16:57
  To change this template use File | Settings | File Templates.
--%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<% String appPath = request.getContextPath(); %>
<html>
<head>
    <title>Paper列表</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    基於SSM框架的管理系統：簡單實現增、刪、改、查。
                </h1>
            </div>
        </div>
    </div>

    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>論文列表 —— 顯示所有論文</small>
                </h1>
            </div>
        </div>
    </div>
    <div class="row">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${path}/paper/toAddPaper">新增</a>
        </div>
    </div>
    <div class="row clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>論文編號</th>
                    <th>論文名字</th>
                    <th>論文數量</th>
                    <th>論文詳情</th>
                    <th>操作</th>
                </tr>
                </thead>
                <tbody>
                <c:forEach var="paper" items="${requestScope.get('list')}" varStatus="status">
                    <tr>
                        <td>${paper.paperId}</td>
                        <td>${paper.paperName}</td>
                        <td>${paper.paperNum}</td>
                        <td>${paper.paperDetail}</td>
                        <td>
                            <a href="${path}/paper/toUpdatePaper?id=${paper.paperId}">更改</a> |
                            <a href="<%=appPath%>/paper/del/${paper.paperId}">刪除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

addPaper.jsp:

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2018/4/7
  Time: 16:45
  To change this template use File | Settings | File Templates.
--%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>
<html>
<head>
    <title>新增論文</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    基於SSM框架的管理系統：簡單實現增、刪、改、查。
                </h1>
            </div>
        </div>
    </div>

    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>新增論文</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="" name="userForm">
        論文名稱：<input type="text" name="paperName"><br><br><br>
        論文數量：<input type="text" name="paperNum"><br><br><br>
        論文詳情：<input type="text" name="paperDetail"><br><br><br>
        <input type="button" value="新增" onclick="addPaper()">
    </form>

    <script type="text/javascript">
        function addPaper() {
            var form = document.forms[0];
            form.action = "<%=basePath %>paper/addPaper";
            form.method = "post";
            form.submit();
        }
    </script>
</div>

updatePaper.jsp:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>
<html>
<head>
    <title>修改論文</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    基於SSM框架的管理系統：簡單實現增、刪、改、查。
                </h1>
            </div>
        </div>
    </div>

    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>修改論文</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="" name="userForm">
        <input type="hidden" name="paperId" value="${paper.paperId}"/>
        論文名稱：<input type="text" name="paperName" value="${paper.paperName}"/>
        論文數量：<input type="text" name="paperNum" value="${paper.paperNum}"/>
        論文詳情：<input type="text" name="paperDetail" value="${paper.paperDetail }"/>
        <input type="button" value="提交" onclick="updatePaper()"/>
    </form>
    <script type="text/javascript">
        function updatePaper() {
            var form = document.forms[0];
            form.action = "<%=basePath %>paper/updatePaper";
            form.method = "post";
            form.submit();
        }
    </script>
</div>

感謝原作者，但是在自己的IDEA跑了好幾個都是404，找了很多部落格最終執行成功！希望接下來能順利完成開發任務！