@muyanfeixiang 2017-01-12T17:27:23.000000Z 字数 2562 阅读 1337

Java Web学习笔记(5)

JavaWeb Spring SpringMVC

上一小节使用了servlet，本小节使用jsp，jsp类似asp.net mvc中cshtml文件。

添加jsp依赖

首先在pom.xml文件中添加jsp模块依赖，如下。

 <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>javax.servlet.jsp.jstl-api</artifactId>
            <version>1.2.1</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.web</groupId>
            <artifactId>javax.servlet.jsp.jstl</artifactId>
            <version>1.2.2</version>
            <scope>compile</scope>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp</groupId>
                    <artifactId>jsp-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp.jstl</groupId>
                    <artifactId>jstl-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

添加jsp文件

在web中的WEB-INF下添加jsp文件夹，添加Greet.jsp文件
image_1b68t9llp182j1ndio84ip3f199.png-62.1kB
Greet.jsp文件内容如下

<%--
  Created by IntelliJ IDEA.
  User: liuyb
  Date: 2017/1/12
  Time: 16:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>From Greet jsp</title>
</head>
<body>
<p>Hello From Greet.jsp 文件</p>
</body>
</html>

当然此时jsp还不能被使用，首先需要在web.xml中添加相应的配置。如下

    <jsp-config>
        <jsp-property-group>
            <url-pattern>*.jsp</url-pattern>
            <url-pattern>*.jspf</url-pattern>
            <page-encoding>UTF-8</page-encoding>
            <scripting-invalid>false</scripting-invalid>
            <trim-directive-whitespaces>true</trim-directive-whitespaces>
            <default-content-type>text/html</default-content-type>
        </jsp-property-group>
    </jsp-config>

再次需要修改GreetServlet，来指定返回的jsp文件，修改如下

package com.liuyb;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
 * Created by liuyb on 2017/1/12.
 */
@WebServlet(
        name = "greetServlet",
        urlPatterns = {"/greet"},
        loadOnStartup = 1
)
@MultipartConfig(
        fileSizeThreshold = 5_242_880, //5MB
        maxFileSize = 20_971_520L, //20MB
        maxRequestSize = 41_943_040L //40MB
)
public class GreetServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.getRequestDispatcher("/WEB-INF/jsp/Greet.jsp")
                .forward(req, resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().println("Hello Post From GreetServlet");
    }
}

然后运行程序，在浏览器输入http://localhost:8080/greet
可以看到如下
image_1b68vsue3f03183emhk9jrgtb9.png-10.8kB

Java Web学习笔记(5)

添加jsp依赖

添加jsp文件

内容目录