Thymeleaf教學 » Thymeleaf表單

Thymeleaf表單

本文章將介紹Thymeleaf中實現表單的語法和概念。

編輯原始碼以便將產品列表中的某個資料。已經將Product類的物件列表設定為具有變數名稱product的上下文模型(參考:MyController.java中的實現)。

如果要上機實踐，請參考:Thymeleaf+SpringMVC5範例專案。這裡不再重複建立專案的過程，這裡將只介紹如何使用Thymeleaf Spring表示式和標籤。

這裡建立一個Maven Web專案: thymeleaf-tutorials ，其目錄結構如下所示 -

資料存取類的實現:DAO.java - 

package com.yiibai.dao;

import java.math.BigDecimal;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import com.yiibai.spring.bean.*;

/**
 * Mock persistence.
 */
public class DAO {

    private static final String NO_WEBSITE = null;

    public static Product loadProduct() {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            return new Product("Wooden wardrobe with glass doors", Integer.valueOf(850), sdf.parse("2013-02-18"));
        } catch (ParseException ex) {
            throw new RuntimeException("Invalid date");
        }
    }

    public static List<Product> loadAllProducts() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        List<Product> products = new ArrayList<Product>();
        try {
            products.add(new Product("花生油", Integer.valueOf(125), sdf.parse("2018-02-18")));
            products.add(new Product("蘇打餅乾", Integer.valueOf(15), sdf.parse("208-02-15")));
            products.add(new Product("拿鐵", Integer.valueOf(45), sdf.parse("2019-02-20")));
            products.add(new Product("調和油", Integer.valueOf(20), sdf.parse("2019-02-21")));
            products.add(new Product("大豆油", Integer.valueOf(49), sdf.parse("2019-02-15")));
            products.add(new Product("玉米汁", Integer.valueOf(80), sdf.parse("2019-02-17")));
        } catch (ParseException ex) {
            throw new RuntimeException("Invalid date");
        }
        return products;
    }

    public static Timestamp loadReleaseDate() {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
            Date date = sdf.parse("2014-01-31 15:00");
            return new Timestamp(date.getTime());
        } catch (ParseException ex) {
            throw new RuntimeException("Invalid date");
        }
    }
}

控制器類的實現:MyController.java - 

package com.yiibai.spring.controller;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.yiibai.dao.DAO;
import com.yiibai.spring.bean.Product;

@Controller
public class MyController {

    @GetMapping("/")
    public String index(Model model) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Product product = new Product("花生油", 129, sdf.parse("2018-02-18"), "");
        model.addAttribute("product", product);
        return "index";
    }

    @RequestMapping(value = { "/addProduct" }, method = RequestMethod.GET)
    public String showaddProduct(Model model)throws ParseException {
        //List<Product> saleTypes = new ArrayList<Product>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Product product = new Product("花生油","花生油描述~", 119, sdf.parse("2018-02-11"), "CX");
        model.addAttribute("product", product);

        return "addProduct";
    }

    @RequestMapping(value = { "/saveProduct" }, method = RequestMethod.POST)
    public String saveprodcut(Model model, String name) throws ParseException {
        //List productList = DAO.loadAllProducts();
        //model.addAttribute("productList", productList);
        return "springel";
    }

}

模板檔案的實現:/webapp/WEB-INFO/views/addProduct.html - 

<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<link rel="stylesheet" th:href="@{/css/main.css}" />
<title>Spring MVC5 + Thymeleaf 表單範例</title>
</head>
<body>
    <h2>Spring MVC5 + Thymeleaf 表單範例</h2>
    <form th:action="@{/saveProduct}" th:object="${product}" method="POST">
          <label for="firstName">產品名稱:</label>
          <input type="text" th:field="*{name}" value="" /><br/>

          <label for="firstName">有效日期:</label>
          <input type="text" th:field="*{availableFrom}" value="2018-03-28" /> <br/>        

          <label for="price">價格 (RMB):</label>
          <input type="text" th:field="*{price}" size="10" value="198" /><br/>

          <input type="submit" value="提交"/>
    </form>
</body>
</html>

執行上面專案，在瀏覽器中顯示效果如下 -