SpringBoot集成之jsp

朴灿烈づ我的快乐病毒、 2021-11-11 13:06 415阅读 0赞

目前市面上用springboot和jsp开发的已经不多，因为jsp有加载的速度慢，每次启动工程重新编译等问题。springboot官网也不太推荐使用jsp，他们推荐使用静态模板，比如Thymeleaf等。但是目前还是有一部分老项目或者少部分公司采用此方式，我们简单了解一下。

### 首先我们将之前的集成springmvc的代码copy一份，稍作改造，pom依赖如下： ###

<?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>
      <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/> 
      </parent>
      <groupId>com.example</groupId>
      <artifactId>demo</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <name>demo</name>
      <description>Demo project for Spring Boot</description>
    
      <properties>
        <java.version>1.8</java.version>
      </properties>
    
      <dependencies>
        <dependency>
          <groupId>org.apache.tomcat.embed</groupId>
          <artifactId>tomcat-embed-jasper</artifactId>
          <scope>provided</scope>
        </dependency>
    
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
        </dependency>
    
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter</artifactId>
        </dependency>
    
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-test</artifactId>
          <scope>test</scope>
        </dependency>
      </dependencies>
    
      <build>
        <plugins>
          <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
          </plugin>
        </plugins>
      </build>
    
    </project>

### controller代码： ###

package com.example.springboot02.controller;
    
    import com.example.springboot02.entity.User;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * Created by linjiaming
     */
    @Controller
    public class HelloController {
        @Value("${boot.name}")
        private String name;
    
        @RequestMapping("/hello")
        public String hello(Model md){
            User user = new User();
            user.setName(name);
            user.setAge("18");
            md.addAttribute("name",user.getName());
            return "index";
        }
    }

###    接下来我们定义springmvc映射的配置 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70][]

### 如下图所示，当前工程中并没有webapp相关的目录 ###

![20190805222745406.png][]

### 我们可通过项目的结构图中，选择添加web模块，然后选择web模块部署的位置 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 2][]

### 确定之后，在web-inf下新建一个index.jsp ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 3][]

### index.jsp ###

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        你好呀,${name}!
    </body>
    </html>

### 运行项目后结果如下： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 4][]

### 若遇到访问不到jsp页面，可能是jsp页面没编译，pom文件下添加如下配置 ###

<resources>
          <resource>
            <directory>src/main/webapp</directory>
            <targetPath>META-INF/resources</targetPath>
            <includes>**/*.*</includes>
          </resource>
        </resources>

### 此时classes文件内有相应的jsp ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 5][]

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[20190805222745406.png]: /images/20211109/0e9eb7d062984f3baa1230f1e0be6801.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTEx_size_16_color_FFFFFF_t_70 1]: /images/20211109/11e9143b92434203a7ce24894102e6a1.png
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