使用FreeMarker生成静态HTML

向右看齐 2022-10-01 04:43 303阅读 0赞

1、FreeMarker需要添加的Maven依赖：

1 <dependency>
    2     <groupId>org.freemarker</groupId>
    3     <artifactId>freemarker</artifactId>
    4     <version>2.3.23</version>
    5 </dependency>

2、使用模板生成HTML代码

2.1 数据模型

![复制代码][copycode.gif]

1 public class User {
     2 
     3     private String username;
     4 
     5     private String password;
     6 
     7     private Integer age;
     8 
     9     private String address;
    10 
    11     //省略setter和getter方法  
    12 }

![复制代码][copycode.gif]

2.2 FreeMarker模板

![复制代码][copycode.gif]

1 <!DOCTYPE html>
     2 <html>
     3 <head>
     4 <meta charset="UTF-8">
     5 <title>用户信息</title>
     6 
     7 <link rel="stylesheet"
     8     href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css" />
     9 </head>
    10 <body style="font-family:'Courier New'">
    11     <h3 class="text-center">这是用户${username}的信息页！</h3>
    12     <div class="col-md-6 column">
    13         <table class="table table-bordered">
    14             <tr>
    15                 <th>用户名</th>
    16                 <th>密码</th>
    17                 <th>年龄</th>
    18                 <th>地址</th>
    19             </tr>
    20             <tr>
    21                 <td>${username}</td>
    22                 <td>${password}</td>
    23                 <td>${age}</td>
    24                 <td>${address}</td>
    25             </tr>
    26         </table>
    27     </div>
    28 </body>
    29 </html>

![复制代码][copycode.gif]

2.3 使用FreeMarker生成HTML代码

![复制代码][copycode.gif]

1     /**
     2      * 使用模板生成HTML代码
     3      */
     4     public static void createHtmlFromModel() {
     5         FileWriter out = null;
     6         try {
     7             // 通过FreeMarker的Confuguration读取相应的模板文件
     8             Configuration configuration = new Configuration(Configuration.VERSION_2_3_23);
     9             // 设置模板路径
    10             configuration.setClassForTemplateLoading(CreateHtmlByFreemarker.class, "/static/ftl");
    11             // 设置默认字体
    12             configuration.setDefaultEncoding("utf-8");
    13 
    14             // 获取模板
    15             Template template = configuration.getTemplate("user.ftl");
    16             //设置模型
    17             User user = new User("tom", "hahahah", 28, "上海市");
    18             
    19             //设置输出文件
    20             File file = new File("e:/html/result.html");
    21             if(!file.exists()) {
    22                 file.createNewFile();
    23             }
    24             //设置输出流
    25             out = new FileWriter(file);
    26             //模板输出静态文件
    27             template.process(user, out);
    28         } catch (TemplateNotFoundException e) {
    29             e.printStackTrace();
    30         } catch (MalformedTemplateNameException e) {
    31             e.printStackTrace();
    32         } catch (ParseException e) {
    33             e.printStackTrace();
    34         } catch (IOException e) {
    35             e.printStackTrace();
    36         } catch (TemplateException e) {
    37             e.printStackTrace();
    38         } finally {
    39             if(null != out) {
    40                 try {
    41                     out.close();
    42                 } catch (IOException e) {
    43                     e.printStackTrace();
    44                 }
    45             }
    46         }
    47     }

![复制代码][copycode.gif]

3、使用String作为FreeMarker模板，生成HTML代码

3.1 数据模型使用2.1模型

3.2 模板使用2.2模板

3.3 使用FreeMarker生成HTML代码

![复制代码][copycode.gif]

1 /**
     2      * 把模板读入到String中，然后根据String构造FreeMarker模板
     3      */
     4     public static void createHtmlFromString() {
     5         BufferedInputStream in = null;
     6         FileWriter out = null;
     7         try {
     8             //模板文件
     9             File file = new File("D:/EclipseLearnSpace/ResearchSpace/Html2Pdf/src/main/resources/static/html/user.html");
    10             //构造输入流
    11             in = new BufferedInputStream(new FileInputStream(file));
    12             int len;
    13             byte[] bytes = new byte[1024];
    14             //模板内容
    15             StringBuilder content = new StringBuilder();
    16             while((len = in.read(bytes)) != -1) {
    17                 content.append(new String(bytes, 0, len, "utf-8"));
    18             }
    19             
    20             //构造Configuration
    21             Configuration configuration = new Configuration(Configuration.VERSION_2_3_23);
    22             //构造StringTemplateLoader
    23             StringTemplateLoader loader = new StringTemplateLoader();
    24             //添加String模板
    25             loader.putTemplate("test", content.toString());
    26             //把StringTemplateLoader添加到Configuration中
    27             configuration.setTemplateLoader(loader);
    28             
    29             //构造Model
    30             User user = new User("tom", "kkkkk", 29, "北京山东");
    31             //获取模板
    32             Template template = configuration.getTemplate("test");
    33             //构造输出路
    34             out = new FileWriter("e:/html/result.html");
    35             //生成HTML
    36             template.process(user, out);
    37         } catch (FileNotFoundException e) {
    38             e.printStackTrace();
    39         } catch (UnsupportedEncodingException e) {
    40             e.printStackTrace();
    41         } catch (IOException e) {
    42             e.printStackTrace();
    43         } catch (TemplateException e) {
    44             e.printStackTrace();
    45         } finally {
    46             if(null != in) {
    47                 try {
    48                     in.close();
    49                 } catch (IOException e) {
    50                     e.printStackTrace();
    51                 }
    52             }
    53             if(null != out) {
    54                 try {
    55                     out.close();
    56                 } catch (IOException e) {
    57                     e.printStackTrace();
    58                 }
    59             }
    60         }
    61         
    62     }

![复制代码][copycode.gif]

4、使用String模板，模板中使用List

4.1 数据模型

![复制代码][copycode.gif]

1 public class Classes {
     2 
     3     private String classId; // 班级ID
     4 
     5     private String className; // 班级名称
     6 
     7     private List<User> users;
     8 
     9     public String getClassId() {
    10         return classId;
    11     }
    12 
    13     //省略settter和getter方法
    14 
    15 }

![复制代码][copycode.gif]

4.2 FreeMarker模板

![复制代码][copycode.gif]

1 <!DOCTYPE html>
     2 <html>
     3 <head>
     4 <meta charset="UTF-8">
     5 <title>班级信息</title>
     6 
     7 <link rel="stylesheet"
     8     href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css" />
     9 <style type="text/css">
    10     .table-align{
        
    11         margin-left: 25%;
    12     }
    13 </style>
    14 </head>
    15 <body style="font-family:'Courier New'">
    16 
    17     <h3 class="text-center">下面是班级ID【${classId}】，班级名称【${className}】的人员信息</h3>
    18     <div class="col-md-6 column table-align">
    19         <table class="table">
    20             <tr>
    21                 <th>姓名</th>
    22                 <th>密码</th>
    23                 <th>年龄</th>
    24                 <th>地址</th>
    25             </tr>
    26             
    27             <#list users as user>
    28                 <tr>
    29                     <td>${user.username}</td>
    30                     <td>${user.password}</td>
    31                     <td>${user.age}</td>
    32                     <td>${user.address}</td>
    33                 </tr>
    34             </#list>
    35         </table>
    36     </div>
    37 </body>
    38 </html>

![复制代码][copycode.gif]

4.3 使用FreeMarker生成HTML代码

![复制代码][copycode.gif]

1 /**
     2      * 根据String模板生成HTML，模板中存在List循环
     3      */
     4     public static void createHtmlFromStringList() {
     5         BufferedInputStream in = null;
     6         FileWriter out = null;
     7         try {
     8             //模板文件
     9             File file = new File("D:/EclipseLearnSpace/ResearchSpace/Html2Pdf/src/main/resources/static/html/class.html");
    10             //构造输入流
    11             in = new BufferedInputStream(new FileInputStream(file));
    12             int len;
    13             byte[] bytes = new byte[1024];
    14             //模板内容
    15             StringBuilder content = new StringBuilder();
    16             while((len = in.read(bytes)) != -1) {
    17                 content.append(new String(bytes, 0, len, "utf-8"));
    18             }
    19             
    20             //构造Configuration
    21             Configuration configuration = new Configuration(Configuration.VERSION_2_3_23);
    22             //构造StringTemplateLoader
    23             StringTemplateLoader loader = new StringTemplateLoader();
    24             //添加String模板
    25             loader.putTemplate("test", content.toString());
    26             //把StringTemplateLoader添加到Configuration中
    27             configuration.setTemplateLoader(loader);
    28             
    29             //构造Model
    30             Classes classes = new Classes();
    31             classes.setClassId("23");
    32             classes.setClassName("实验一班");
    33             List<User> users = new ArrayList<User>();
    34             User user = new User("tom", "kkkkk", 29, "北京");
    35             users.add(user);
    36             User user2 = new User("Jim", "hhhh", 22, "上海");
    37             users.add(user2);
    38             User user3 = new User("Jerry", "aaaa", 25, "南京");
    39             users.add(user3);
    40             classes.setUsers(users);
    41             //获取模板
    42             Template template = configuration.getTemplate("test");
    43             //构造输出路
    44             out = new FileWriter("e:/html/result.html");
    45             //生成HTML
    46             template.process(classes, out);
    47         } catch (FileNotFoundException e) {
    48             e.printStackTrace();
    49         } catch (UnsupportedEncodingException e) {
    50             e.printStackTrace();
    51         } catch (IOException e) {
    52             e.printStackTrace();
    53         } catch (TemplateException e) {
    54             e.printStackTrace();
    55         } finally {
    56             if(null != in) {
    57                 try {
    58                     in.close();
    59                 } catch (IOException e) {
    60                     e.printStackTrace();
    61                 }
    62             }
    63             if(null != out) {
    64                 try {
    65                     out.close();
    66                 } catch (IOException e) {
    67                     e.printStackTrace();
    68                 }
    69             }
    70         }
    71         
    72     }

[copycode.gif]: /images/20220705/463a8a9728604d4fb162ed90639762b4.png