现在开源的web项目都带有自动安装的功能，它的原理就是把项目的web.xml等配置文件放在一个目录下(install/config)，新创建一个web.xml来进行安装，包括项目的配置信息、数据库的相关配置(jdbc.properties)及初始化数据、然后再把配置文件及web.xml拷贝到相应的目录。项目如下图：

cms安装

1.把项目的配置文件放在一个目录下
我这里有web.xml和springmvc的配置文件(study-servlet.xml)这两个配置文件，把他先放在install/config目录下

2.创建一个新的web.xml文件，引导安装

web.xml的代码如下：

<servlet>
    <servlet-name>Install</servlet-name>
    <servlet-class>com.naxsu.cms.InstallServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>Install</servlet-name>
    <url-pattern>/install/install_setup.svl</url-pattern>
</servlet-mapping>
<welcome-file-list>
    <welcome-file>install.html</welcome-file>
</welcome-file-list>

3.创建install.html
这个html文件，会自动跳到install/index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="pragma" content="no-cache"/>
<meta http-equiv="Cache-Control" content="no-cache,must-revalidate"/>
<meta http-equiv="expires" content="Wed, 26 Feb 1997 08:21:57 GMT"/> 
<meta http-equiv="expires" content="0"/>
<meta http-equiv="refresh" content="0;URL=install/index.html"/>
<title>CMS安装</title>
</head>
<body>
    您还没有安装JEECMS，将自动跳转到安装页面。<br/>
    如果您的浏览器长时间没有反应，请直接点击<a href="install/index.html">CMS安装</a>。
</body>
</html>

4.创建许可协议html文件：install/index.html

用户许可协议

主要代码如下：

<form id="license_form" action="install_params.jsp" method="post">
    <input type="checkbox" id="license_agree" name="license_agree"/>
    我已经阅读并同意此协议
    <input type="button" class="btn" value="下一步 >"/>
</form>

5.许可协议后，进入install_params.jsp，配置一些参数信息

系统参数配置

这里的代码比较简单，就是input表单，给一些默认值就可以了

域名、部署路径和端口号这里是获取的默认值，代码如下：

域名：<input name="domain" type="text" class="input" value="<%=request.getServerName()%>"/>
部署路径：<input name="cxtPath" type="text" class="input" value="<%=request.getContextPath()%>"/>
端口号：<input name="port" type="text" class="input" value="<%=request.getServerPort()%>"/>

一定要注意一下，要把数据库和初始化数据库的文件路径给传过去
<input type="hidden" name="dbFileName" value="/install/db/db.sql"/>
<input type="hidden" name="initFileName" value="/install/db/init.sql"/>

6.提交表单，进行安装InstallServlet.java

在这里就直接贴代码了，代码很简单：

package com.naxsu.cms;
 
import java.io.IOException;
import java.util.List;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class InstallServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    @Override
    protected void doPost(HttpServletRequest request,
    HttpServletResponse response) throws            
        ServletException, IOException {
     
        String dbHost = request.getParameter("dbHost");
    String dbPort = request.getParameter("dbPort");
    String dbName = request.getParameter("dbName");
    String dbUser = request.getParameter("dbUser");
    String dbPassword = request.getParameter("dbPassword");
 
    String isCreateDb = request.getParameter("isCreateDb");
    String isCreateTable = request.getParameter("isCreateTable");
    String isInitData = request.getParameter("isInitData");
    String domain = request.getParameter("domain");
    String cxtPath = request.getParameter("cxtPath");
    String port = request.getParameter("port");
 
    String dbFileName = request.getParameter("dbFileName");
    String initFileName = request.getParameter("initFileName");
    String dbXmlFileName = "/WEB-INF/config/jdbc.properties";
    String webXmlFrom = "/install/config/web.xml";
    String webXmlTo = "/WEB-INF/web.xml";
         
    try {
        // 创建数据库
        if ("true".equals(isCreateDb)) {
            Install.createDb(dbHost, dbPort, dbName, dbUser, dbPassword);
        } else {
            Install.changeDbCharset(dbHost, dbPort, dbName, dbUser,dbPassword);
        }
        // 创建表
        if ("true".equals(isCreateTable)) {
            String sqlPath = getServletContext().getRealPath(dbFileName);
            List<String> sqlList = Install.readSql(sqlPath);
            Install.createTable(dbHost, dbPort, dbName, dbUser, dbPassword,sqlList);
        }
        // 初始化数据
        if ("true".equals(isInitData)) {
            String initPath = getServletContext().getRealPath(initFileName);
            List<String> initList = Install.readSql(initPath);
            Install.createTable(dbHost, dbPort, dbName, dbUser, dbPassword,initList);
        }
        // 处理数据库配置文件
        String dbXmlPath = getServletContext().getRealPath(dbXmlFileName);
        Install.dbXml(dbXmlPath, dbHost, dbPort, dbName, dbUser,dbPassword);
        // 处理web.xml
        String webXmlFromPath = getServletContext().getRealPath(webXmlFrom);
        String webXmlToPath = getServletContext().getRealPath(webXmlTo);
        Install.webXml(webXmlFromPath, webXmlToPath);
    } catch (Exception e) {
        throw new ServletException("install failed!", e);
    }
    RequestDispatcher dispatcher = request
        .getRequestDispatcher("/install/install_setup.jsp");
    dispatcher.forward(request, response);
    }
}

Install.java

package com.naxsu.cms;
 
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
 
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
 
/**
 * 安装类
 */
public class Install {
    public static void dbXml(String fileName, String dbHost, String dbPort,
        String dbName, String dbUser, String dbPassword) throws Exception {
        String s = FileUtils.readFileToString(new File(fileName));
        s = StringUtils.replace(s, "DB_HOST", dbHost);
        s = StringUtils.replace(s, "DB_PORT", dbPort);
        s = StringUtils.replace(s, "DB_NAME", dbName);
        s = StringUtils.replace(s, "DB_USER", dbUser);
        s = StringUtils.replace(s, "DB_PASSWORD", dbPassword);
        FileUtils.writeStringToFile(new File(fileName), s);
    }
 
    public static Connection getConn(String dbHost, String dbPort,
        String dbName, String dbUser, String dbPassword) throws Exception {
        Class.forName("com.mysql.jdbc.Driver");
     
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        String connStr = "jdbc:mysql://" + dbHost + ":" + dbPort + "/" 
            + dbName+ "?user=" + dbUser + "&password=" + dbPassword
            + "&characterEncoding=utf8";
        Connection conn = DriverManager.getConnection(connStr);
        return conn;
    }
 
    public static void webXml(String fromFile, String toFile) throws Exception {
        FileUtils.copyFile(new File(fromFile), new File(toFile));
    }
 
    /**
     * 创建数据库
     * 
     * @param dbHost
     * @param dbName
     * @param dbPort
     * @param dbUser
     * @param dbPassword
     * @throws Exception
     */
    public static void createDb(String dbHost, String dbPort, String dbName,
        String dbUser, String dbPassword) throws Exception {
        Class.forName("com.mysql.jdbc.Driver");
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        String connStr = "jdbc:mysql://" + dbHost + ":" + dbPort + "?user="
            + dbUser + "&password=" + dbPassword
            + "&characterEncoding=UTF8";
        Connection conn = DriverManager.getConnection(connStr);
        Statement stat = conn.createStatement();
        String sql = "drop database if exists " + dbName;
        stat.execute(sql);
        sql = "create database " + dbName + " CHARACTER SET UTF8";
        stat.execute(sql);
        stat.close();
        conn.close();
    }
 
    public static void changeDbCharset(String dbHost, String dbPort,
        String dbName, String dbUser, String dbPassword) throws Exception {
        Connection conn = getConn(dbHost, dbPort, dbName, dbUser, dbPassword);
        Statement stat = conn.createStatement();
        String sql = "ALTER DATABASE " + dbName + " CHARACTER SET UTF8";
        stat.execute(sql);
        stat.close();
        conn.close();
    }
 
    /**
     * 创建表
     * 
     * @param dbHost
     * @param dbName
     * @param dbPort
     * @param dbUser
     * @param dbPassword
     * @param sqlList
     * @throws Exception
     */
    public static void createTable(String dbHost, String dbPort, String dbName,
        String dbUser, String dbPassword, List<String> sqlList)
        throws Exception {
        Connection conn = getConn(dbHost, dbPort, dbName, dbUser, dbPassword);
        Statement stat = conn.createStatement();
        for (String dllsql : sqlList) {
            System.out.println(dllsql);
            stat.execute(dllsql);
        }
        stat.close();
        conn.close();
    }
 
    /**
     * 读取sql语句。“/*”开头为注释，“;”为sql结束。
     * 
     * @param fileName
     *            sql文件地址
     * @return list of sql
     * @throws Exception
     */
    public static List<String> readSql(String fileName) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(
            new FileInputStream(fileName), "UTF-8"));
        List<String> sqlList = new ArrayList<String>();
        StringBuilder sqlSb = new StringBuilder();
        String s = null;
        while ((s = br.readLine()) != null) {
            if (s.startsWith("/*") || s.startsWith("#")
                || StringUtils.isBlank(s)) {
                continue;
            }
            if (s.endsWith(";")) {
                sqlSb.append(s);
                sqlSb.setLength(sqlSb.length() - 1);
                sqlList.add(sqlSb.toString());
                sqlSb.setLength(0);
            } else {
                sqlSb.append(s);
            }
        }
        br.close();
        return sqlList;
    }
}

7.安装成功

系统安装成功

本文链接：java cms 在线安装原理及详细步骤，转载请注明出处

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