Thymeleaf 錯誤 以及thymeleafMVC配置，前端程式碼例子
阿新 • • 發佈：2019-01-10
springMVC java配置檔案 配置使用 thymeleaf 的時候一直報 這個錯：
The type org.thymeleaf.ITemplateEngine cannot be resolved. It is indirectly referenced from required .class files
還以為是 引用的JRE版本太低或者太高 試了很久也沒用，後來發現是由於 缺少jar包引起的
缺少：thymeleaf-3.0.3.RELEASE， 使用thymeleaf 需要thymeleaf-3.0.3.RELEASE 和thymeleaf-spring4-3.0.3.RELEASE.jar 兩個jar包
可見：不只classNotFound 錯誤是可能缺少jar包，錯誤引用也可能是缺少jar包
看spring4 in action 根本沒說需要什麼bean，碰了很多釘子 最終得出 需要的thyleaf jar 包為：
thymeleaf-3.0.3.RELEASE 、thymeleaf-spring4-3.0.3.RELEASE.jar、attoparser-2.0.0.RELEASE.jar、unbescape-1.0.jar
mvc java 配置程式碼：
package config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ITemplateResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
@EnableWebMvc
@ComponentScan(basePackages="controller")
@Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {
@Bean
public ITemplateResolver templateResolver() {
SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
templateResolver.setTemplateMode("HTML5");
templateResolver.setPrefix("/WEB-INF/thymeleaf/");
templateResolver.setSuffix(".html");
templateResolver.setCharacterEncoding("utf-8");
templateResolver.setOrder(1);
templateResolver.setCacheable(false);
return templateResolver;
}
@Bean
public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver) {
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(templateResolver);
return templateEngine;
}
@Bean
// public ViewResolver viewResolver() {
public ThymeleafViewResolver viewResolver(TemplateEngine templateEngine) {
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setTemplateEngine(templateEngine);
viewResolver.setCharacterEncoding("utf-8");
return viewResolver;
}
}
前端例子程式碼：
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<style type="text/css">
label.error{
color:red;
}
input.error{
background:yellow
}
</style>
</head>
<body>
//th:object 代表命令物件也就是表單要繫結的物件，跟spring form表單繫結標籤中commandName 繫結物件類似
//當請求跳轉到該頁面需要相應的傳一個帶有key為user的物件，key預設為該物件型別的小寫字母開頭
//th:action 代表要提交的表單連結, url格式為 @{} 後臺程式碼controller：
@Controller
public class ThyController {
@RequestMapping("/toleaf")
public String tleaf(Model model){
//向前臺新增一個命令物件
//預設key為該型別User->小寫字母user
//也就是表單中th:object=${user}
model.addAttribute(new User());
return "tleaf";
}
@RequestMapping("/register")
public String register(@Valid User user,Errors errors){
System.out.println(user.getUsername());
if(errors.hasErrors()){
return "tleaf";
}
return "success";
}
}