Thymeleaf

• https://www.thymeleaf.org/
• modern server-side Java template engine

pom.xml

xmlCopy
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
  </dependency>

base

• src/main/resources/templates/greeting.html

htmlCopy
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>Getting Started: Serving Web Content</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <p th:text="'Hello, ' + ${name} + '!'" />
</body>
</html>

Controller

javaCopy
@Controller
public class GreetingController {
  @GetMapping("/greeting")
  public String greeting(@RequestParam(name="name", required=false, defaultValue="World") String name, Model model) {
    model.addAttribute("name", name);
    return "greeting";
  }
}

Syntax

Simple expressions

• Variable Expressions: ${...}
• Selection Variable Expressions: *{...}
• Message Expressions: #{...}
• Link URL Expressions: @{...}
• Fragment Expressions: ~{...}

Literals

• Text literals: 'one text', 'Another one!',…
• Number literals: 0, 34, 3.0, 12.3,…
• Boolean literals: true, false
• Null literal: null
• Literal tokens: one, sometext, main,…

Text operations:

• String concatenation: +
• Literal substitutions: |The name is ${name}|

Arithmetic operations:

• Binary operators: +, -, *, /, %
• Minus sign (unary operator): -

Boolean operations:

• Binary operators: and, or
• Boolean negation (unary operator): !, not

Comparisons and equality:

• Comparators: >, <, >=, <= (gt, lt, ge, le)
• Equality operators: ==, != (eq, ne)

Conditional operators:

• If-then: (if) ? (then)
• If-then-else: (if) ? (then) : (else)
• Default: (value) ?: (defaultvalue)

Special tokens:

• No-Operation: _