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11.1 spring-boot environment preparation
Important dependencies:
<!--thymeleaf-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>11.2 Forwarding messages without escaping
That is, if a string is <h1>a title</h1>, it will be a string if it is not escaped; if it is escaped, it will output a title according to the syntax of html. The syntax of thymeleaf is: just add the th:text attribute to the tag, which is the non-escaping writing method.
Controller class: pass the name variable to the hello.html page.
package jiang.com.springbootstudy.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/hello")
public class HelloWorldController {
@RequestMapping("/test")
public String hello(Model model){
model.addAttribute("name","<h1>这是一个标题</h1>");
return "hello";
}
}
HTML in the static folder:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div th:text="${name}"></div>
</body>
</html>Result after visiting the page:
11.3 Forwarding message escaping
Escaping means that when the forwarded string is written according to html rules, such as <h1>This is the title</h1>, the syntax output of html will be installed. Thymeleaf uses the th:utext attribute for escaping.
The controller code is consistent with 11.2.
HTML in the static folder:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div th:utext="${name}"></div>
</body>
</html>Result after visiting the page:
11.4 Traversing Arrays
Controller class: use Array.asList() to convert the array into a collection;
package jiang.com.springbootstudy.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.ArrayList;
import java.util.Arrays;
@Controller
@RequestMapping("/hello")
public class HelloWorldController {
@RequestMapping("/test")
public String hello(Model model){
model.addAttribute("names", Arrays.asList("zhangsan", "lisi")); // Arrays.asList把数组转为集合
return "hello";
}
}
html: first use th:each = "name : ${names}" to traverse the names, and assign the value extracted each time to the name variable; then use th:text = "${name}" to extract the value of the name variable :
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div th:each= "names:${names}" th:text="${names}"></div>
</body>
</html>URL access result:
