eclipse+struts2.5.22的配置和案例

2023-12-25 20:28:40

注意：不同的struts2版本，web.xml的配置可能不同

1．进入MyEclipse环境，新建一个Web Project。

2. 设计数据库表结构。

CREATE TABLE `book` (

`ID` varchar(255) NOT NULL,

`Name` varchar(255) DEFAULT NULL,

`Type` varchar(255) DEFAULT NULL,

`Author` varchar(255) DEFAULT NULL,

PRIMARY KEY (`ID`)

)

3. 采用Struts2技术完成数据库的CRUD。

Struts2版本：2.5.22

Struts2下载网址：https://struts.apache.org/download.cgi#struts2522

下载struts-2.5.22-all.zip,解压

解压后目录：

到lib文件夹中找到需要的jar包放到项目的/WEB-INF/lib下

总目录结构：

struts2.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

<package name="default" namespace="/action" extends="struts-default">

    <action name="BookAdd" class="action.BookAdd">
        <result name="Success">/index.jsp</result>
        <result name="Error">/Error.jsp</result>
    </action>
    <action name="BookEdit" class="action.BookEdit">
        <result name="Success">/index.jsp</result>
        <result name="Error">/Error.jsp</result>
    </action>
        <action name="BookDelete" class="action.BookDelete">
        <result name="Success">/index.jsp</result>
        <result name="Error">/Error.jsp</result>
    </action>
</package>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>实验二</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
       <filter>
    <filter-name>Struts2</filter-name>
    <filter-class>
    org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>Struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta charset="UTF-8">
<title>My JSP ‘index.jsp‘ starting page</title>
</head>
<body>
<form name="f1" id="f1" action="action/BookAdd.action" method="post">
    <table align="center">
        <h3 align="center">图书管理系统</h1>
        <tr>
            <td><a href="bookadd.jsp">图书添加</a></td>
        </tr>
        <tr>
            <td><a href="booklist.jsp">图书列表</a></td>
        </tr>
    </table>
</form>
</body>
</html>

bookadd.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>bookadd.jsp</title>
</head>
<body>
<form name="f1" id="f1" action="action/BookAdd.action" method="post">
    <h3 align="center">图书添加</h3>
    
    <table align="center">
        <tr>
            <td colspan="2" align="center"><a href="index.jsp">返回</a></td>
        </tr>
    
        <tr>
            <td>编号：</td>
            <td><input id="ID" name="ID"></td>
        </tr>
        <tr>
            <td>书名：</td>
            <td><input id="Name" name="Name"></td>
        </tr>
        <tr>
            <td>类型：</td>
            <td><input id="Type" name="Type"></td>
        </tr>
        <tr>
            <td>作者：</td>
            <td><input id="Author" name="Author"></td>
        </tr>
        <tr>
            <td colspan="2" align="center"><input type="submit" value=" 确定 " ></td>
        </tr>
    </table>
</form>
</body>
</html>

Error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib uri="/struts-tags" prefix="s" %>
    <%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta charset="UTF-8">
<title>My JSP ‘Error.jsp‘ starting page</title>
</head>
<body>
<form>
    <h3 align="center"><s:property value="msg" /> <br></h3>
    
    <table align="center">
        <tr>
            <td colspan="2" align="center"><a href="index.jsp">返回</a></td>
        </tr>
    </table>
</form>
</body>
</html>

BookAdd.java

package action;
import java.sql.Connection;
import java.sql.Statement;

import com.opensymphony.xwork2.ActionSupport;

import util.DBUtil;

public class BookAdd extends ActionSupport{
    private String ID;
    private String Name;
    private String Type;
    private String Author;
    private String Msg;
    
    public String execute() throws Exception
    {
        Connection conn = DBUtil.getConn();
        String sql = "insert into book(ID,Name,Type,Author) values(‘" + getID() + "‘,‘" +getName()+"‘,‘"+getType()+"‘,‘"+getAuthor()+"‘)";
        Statement state = null;
        try {
            state = conn.createStatement();
            state.executeUpdate(sql);
        }catch (Exception e) {
            setMsg("编号重复!");
            return "Error";
        }
        return "Success";
    }

    public String getID() {
        return ID;
    }

    public void setID(String iD) {
        ID = iD;
    }

    public String getName() {
        return Name;
    }

    public void setName(String name) {
        Name = name;
    }

    public String getType() {
        return Type;
    }

    public void setType(String type) {
        Type = type;
    }

    public String getAuthor() {
        return Author;
    }

    public void setAuthor(String author) {
        Author = author;
    }

    public String getMsg() {
        return Msg;
    }

    public void setMsg(String msg) {
        Msg = msg;
    }

}

DBUtil.java

package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBUtil {
    public static String db_url = "jdbc:mysql://localhost:3306/lianxi?useUnicode=true&characterEncoding=UTF-8";
    public static String db_user = "root";
    public static String db_password = "liu123";

    public static Connection getConn() {
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(db_url, db_user, db_password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }
    
    public static void close(Statement state, Connection conn) {
        if(state!=null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void close(ResultSet rs, Statement state, Connection conn) {
        if(rs!=null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(state!=null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}

eclipse+struts2.5.22的配置和案例

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