Learn from the station b springcloud, now summarize the summary removal of a small error appearing in the video, some of the error-prone places were reminded
b outbound links: https://www.bilibili.com/video/av55993157
data link:
https://pan.baidu.com/s/1o0Aju3IydKA15Vo1pP4z5w
extraction code: 21ru
On a link
next section link:
The following list summarizes:
Implementation Details:
still implemented on a project in springboot:
1. Add the code in the controller / Index.html in:
@GetMapping("/index2")
public String index2(Map<String,String>map){
map.put("name","张三");
return "index";
}
Complete IndexHandler Code:
package com.southwind.controller;
import com.southwind.entity.Student;
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 java.util.ArrayList;
import java.util.List;
import java.util.Map;
@Controller
@RequestMapping("/index")
public class IndexHandler {
@GetMapping("/index")
public String index(Model model){
System.out.println("index...");
List<Student> list = new ArrayList<>();
list.add(new Student(1l,"张三",12));
list.add(new Student(2l,"李四",22));
list.add(new Student(3l,"王五",14));
model.addAttribute("list",list);
return "index";
}
@GetMapping("/index2")
public String index2(Map<String,String>map){
map.put("name","张三");
return "index";
}
}
2. resources / templates / index.html in the, <table> </ table> portion commented,
tagging thereafter:
<p th:text="${name}"></p>
<p th:text="'学生姓名：' + ${name} + 2"></p>
<p th:text="|学生姓名:,${name}|"></p>
Complete index.html Code:
<!DOCTYPE html>
<html xmlns:th="http:www.thymeleaf.org"></html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>hello world</h1>
<!--<table>
<tr>
<th>学生ID</th>
<th>学生姓名</th>
<th>学生年龄</th>
</tr>
<tr th:each="student:${list}"><!– 对应第二行html –>
<td th:text="${student.id}"></td>
<td th:text="${student.name}"></td>
<td th:text="${student.age}"></td>
</tr>
</table>-->
<p th:text="${name}"></p>
<p th:text="'学生姓名：' + ${name} + 2"></p>
<p th:text="|学生姓名:,${name}|"></p>
</body>
</html>
3. Open Application startup class
entering http: // localhost: 9090 / index / index2
conditional:
4. Add code in the IndexHandler.java:
@GetMapping("/if")
public String index3(Map<String,boolean>map){
map.put("flag",true);
return "index";
}
5. in the resources / templates / index.html 3 OK <p> commented, in the subsequent add code:
<p th:if="${flag == true}" th:text="if判断成立"></p>
<p th:unless="${flag != true}" th:text="unless判断成立"></p>
<!-- unless的意思是当该情况不成立时候才成立，即负负得正，则输出text中内容 -->
6. Start Start Application class
entering http: // localhost: 9090 / index / i
cycles:
7 is the controller / IndexHandler of:
@GetMapping("/index")
public String index(Model model){
System.out.println("index...");
List<Student> list = new ArrayList<>();
list.add(new Student(1l,"张三",12));
list.add(new Student(2l,"李四",22));
list.add(new Student(3l,"王五",14));
model.addAttribute("list",list);
return "index";
}
And modify resources / templates / index.html in
Note stat.index not stat: index
<table>
<tr>
<th>index</th>
<th>count</th>
<th>学生ID</th>
<th>学生姓名</th>
<th>学生年龄</th>
</tr>
<tr th:each="student,stat:${list}" th:style="'background-color:'+@{${stat.odd}?'#F2F2F2'}"><!-- 对应第二行html -->
<!-- stat.odd表示如果是奇数行就变色为 #F2F2F2 -->
<td th:text="${stat.index}"></td>
<td th:text="${stat.count}"></td>
<td th:text="${student.id}"></td>
<td th:text="${student.name}"></td>
<td th:text="${student.age}"></td>
</tr>
</table>
stat is a state variable, attribute:
index element in the collection index (starting from 0)
COUNT COUNT elements in a set (starting from 1)
the size of the size set
current of the current iteration variable
even / odd current iteration is an even number / odd number (starting with 0)
First current iteration element is The first is a
last element if the current iteration is the last one
8. Application restart
enter HTTP: // localhost: 9090 / index / index
URL hyperlink
is processed by @ {...}
9. test.html in new resources / templates in
the second line introduced
<html xmlns:th="http:www.thymeleaf.org"></html>
Tagging the <body> </ body> in
<h1>hello world</h1>
<a th:href="@{http://www.baidu.com}">跳转</a>
10. Add the code IndexHandler
@GetMapping("/test")
public String test(){
return "test";
}
11. enter http: // localhost: 9090 / index / test
12. Add the templates / test.html of </ a> later
<a th:href="@{http://localhost:9090/index/url/{na}(na=${name})}">跳转2</a>
13. IndexHandler modify the test code and add the code section:
@GetMapping("/test")
public String test(Model model){
model.addAttribute("name","tom");
return "test";
}
@GetMapping("/url/{name}")
@ResponseBody
public String url(@PathVariable("name")String name){
return name;
}
14. Restart startup class Application
enter http: // localhost: 9090 / index / test
