blog/毕业论文/毕业论文-5.md

---
title: 毕业设计(5)
tags: 
    - java
    - ssm
    - react
    - ant design
    - typescript
categories: 毕业设计
date: 2022-12-15 12:40:32
summary: Undertow的配置何使用
---

## 十二、Undertow使用

因为在开发过程中使用tomact运行过程中，每一次更改后启动的过程中启动时间大概要30s-60s左右，为了加速启动过程，我搜索了适配servlet的容器，找到了undertow这个容器，并成功适配。

### 1.underwot介绍

Undertow 是红帽公司开发的一款**基于 NIO 的高性能 Web 嵌入式服务器**

#### 特点：

    **轻量级**：它是一个 Web 服务器，但不像传统的 Web 服务器有容器概念，它由两个核心     Jar 包组成，加载一个 Web 应用可以小于 10MB 内存

    **Servlet3.1 支持**：它提供了对 Servlet3.1 的支持

    **WebSocket 支持**：对 Web Socket 完全支持，用以满足 Web 应用巨大数量的客户端

    **嵌套性**：它不需要容器，只需通过 API 即可快速搭建 Web 服务器

### 2.添加依赖

在pom.xml的依赖中添加如下节点

```xml
<!-- https://mvnrepository.com/artifact/com.jfinal/jfinal-undertow -->
    <dependency>
      <groupId>com.jfinal</groupId>
      <artifactId>jfinal-undertow</artifactId>
      <version>3.3</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.jfinal/jfinal -->
    <dependency>
      <groupId>com.jfinal</groupId>
      <artifactId>jfinal</artifactId>
      <version>5.0.7</version>
    </dependency>
```

### 3.配置webbuilder

webbuilder相当于tomact的web.xml，我们只需要将web.xml文件翻译成对应的代码就行了

关键代码

```java
    Consumer<WebBuilder> webBuilderConsumer = e -> { };


    protected void config(){
        WebBuilder wb = new WebBuilder(this);
        wb.addServlet("mvc", "org.springframework.web.servlet.DispatcherServlet")
                .addServletMapping("mvc","/")
                .addServletInitParam("mvc","contextConfigLocation","classpath:spring/spring-mvc.xml")
                .addInitParameter("contextConfigLocation","classpath:spring/spring.xml")
                .addListener("org.springframework.web.context.ContextLoaderListener")
                .addInitParameter("log4jConfigLocation","classpath:log4j.properties")
                .addFilter("Encoding","org.springframework.web.filter.CharacterEncodingFilter")
                .addFilterInitParam("Encoding","encoding","utf-8")
                .addFilterUrlMapping("Encoding","/*");

        webBuilder.accept(wb);
    }
```

### 4.继承UndertowServer

创建自定义类 **Myserver**，继承自 **UndertowServer**，在初始化方法中为一些变量赋值。

```java
public class MyServer extends UndertowServer {

    protected MyServer(UndertowConfig undertowConfig) {
        super(undertowConfig);
    }



    protected void init() {

        super.builder = Undertow.builder();
        super.webBuilder = webBuilderConsumer;
        super.configUndertow();
        config();
    }
}
```

### 5.重写main方法

因为undertow会读取配置文件 **undertow.txt**,所以我们先准备undertow.txt配置文件

```properties
undertow.devMode=true
undertow.port=8080
undertow.host=0.0.0.0
undertow.contextPath=/
undertow.gzip.enable=true
undertow.gzip.level=5
undertow.gzip.minLength=1024
undertow.ioThreads=4
```

然后重写main方法

```java
public static void main(String[] args) {
        new MyServer(new UndertowConfig(UndertowConfig.class)).start(); 
 }
```

### 6.全部代码

```java
package org.gjs.undertow;

import com.jfinal.server.undertow.UndertowConfig;
import com.jfinal.server.undertow.UndertowServer;
import com.jfinal.server.undertow.WebBuilder;
import io.undertow.Undertow;
import java.util.function.Consumer;

public class MyServer extends UndertowServer {

    protected MyServer(UndertowConfig undertowConfig) {
        super(undertowConfig);
    }



    protected void init() {

        super.builder = Undertow.builder();
        super.webBuilder = webBuilderConsumer;
        super.configUndertow();
        config();
    }


    Consumer<WebBuilder> webBuilderConsumer = e -> {
    };
    protected void config(){
        WebBuilder wb = new WebBuilder(this);
        wb.addServlet("mvc", "org.springframework.web.servlet.DispatcherServlet")
                .addServletMapping("mvc","/")
                .addServletInitParam("mvc","contextConfigLocation","classpath:spring/spring-mvc.xml")
                .addInitParameter("contextConfigLocation","classpath:spring/spring.xml")
                .addListener("org.springframework.web.context.ContextLoaderListener")
                .addInitParameter("log4jConfigLocation","classpath:log4j.properties")
                .addFilter("Encoding","org.springframework.web.filter.CharacterEncodingFilter")
                .addFilterInitParam("Encoding","encoding","utf-8")
                .addFilterUrlMapping("Encoding","/*");

        webBuilder.accept(wb);
    }

    public static void main(String[] args) {
        new MyServer(new UndertowConfig(UndertowConfig.class)).start();
    }


}
```

运行测试

![](https://s2.loli.net/2022/12/15/wH9jG3dgMoE7OrS.png)

启动时间只需要7.2s,启动速度显著提升