Spring Boot和thymeleaf ， freemarker , jsp三个前端模块的运用

时间 2019-11-06

标签 spring boot thymeleaf freemarker jsp 三个前端模块运用栏目 Spring 繁體版

原文原文链接

spring boot和三个前端模块的运用javascript

一 .Thymeleafhtml

在idea上建立spring boot 工程，勾选Thymeleaf前端模块，它会自动导入Thymeleaf的依赖前端

建立了spring boot工程后，勾选web和要用的前端模块java

而后随便建立一个bean类web

package com.liy.thymeleaf.bean;

public class User {
    private int id;
    private String name;

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

而后直接写个controller类把数据弄到thymeleaf前端模块里去spring

import com.liy.thymeleaf.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.ArrayList;
import java.util.List;

@Controller
public class UserController {

    @GetMapping("/user")
    public String lists(Model m){
        List<User> users = new ArrayList<>();
        for (int i = 1;i < 10 ; i++){
            User user = new User();
            user.setId(i);
            user.setName("李四"+i);
            users.add(user);
        }
       m.addAttribute("users",users);
        m.addAttribute("username","hahahh");
        return "index";
    }
}

前端模块写个表格，把数据循环出来就行，thymeleaf也是html的后缀apache

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <table border="1">
        <tr>
            <td>编号</td>
            <td>姓名</td>
            <td>username</td>
        </tr>
        <tr th:each="user : ${users}">
            <td th:text="${user.id}"></td>
            <td th:text="${user.name}"></td>
            <td th:text="${username}"></td>
        </tr>
    </table>
<script th:inline="javascript">
    var username = [[${username}]];
    console.log(username)
</script>
</body>
</html>

结果为api

Thymeleaf 在书写 <tr th:each="user : ${users}">时就能够导入“th” tomcat

若是导入的网站和下面的有异，则改为下面那个网址app

<html lang="en" xmlns:th="http://www.thymeleaf.org">

导入spring boot里的thymeleaf依赖，里面有这个前端模块的自动化配置

能够在ThymeleafProperties和ThymeleafAutoConfiguration里去看一些信息

Thymeleaf能够直接获取到controller类里的保存到model里的数据

在js里用 [[${xxxx}]]

body里面直接用 ${}

二. freemarker

freemarker和thymeleaf相似，也是直接在建立spring boot的工程师选择freemarker做为前端模块，那样会自动导入依赖

和thymeleaf只是在书写的方式不同

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>freemarker</title>
</head>
<body>
<table border="1">
    <tr>
        <td>编号</td>
        <td>姓名</td>
    </tr>
    <#list users as user>
        <tr>
            <td>${user.id}</td>
            <td>${user.name}</td>
        </tr>
    </#list>
</table>

</body>
</html>

freemarker循环用法

<#list users as user>
<tr>
<td>${user.id}</td>
<td>${user.name}</td>
</tr>
</#list>

三.jsp

jsp是咱们java开发最基础的前端模块，但在spring boot里倒是用法比较复杂的前端模块

在建立spring boot工程里的前端模块里没有jsp的依赖

因此建立了工程后，得去pom.xml里添加依赖，四个依赖

<dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>

让后得建立webapp，在webapp里面再建立 xx.jsp (导入了jstl标签库)

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2019/5/28 0028
  Time: 17:05
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <table border="1">
        <tr>
            <td>编号</td>
            <td>姓名</td>
        </tr>
        <c:forEach items="${users}" var="user">
            <tr>
                <td>${user.id}</td>
                <td>${user.name}</td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

注意和jsp不一样，thymeleaf和freemarker的页面默认是要安装到 resources 里 /templates/ 目录下，能够本身去修改