Thymeleaf

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

pom.xml

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

base

src/main/resources/templates/greeting.html

<!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

@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: _

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