数据模型：

public class AddressVo implements Serializable {    private static final long serialVersionUID = 1137197211343312155L;    private String name;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public AddressVo(String name) {        this.name = name;    }    public AddressVo() {    }}

public class UserVo implements Serializable {    private String name;    private Integer age;    private List
     
       addressVoList;    private Date birthday;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public List
      
        getAddressVoList() {        return addressVoList;    }    public void setAddressVoList(List
       
         addressVoList) {        this.addressVoList = addressVoList;    }    public Date getBirthday() {        return birthday;    }    public void setBirthday(Date birthday) {        this.birthday = birthday;    }}
       
      
     

 

@GetMapping("list")    public String list(Model model){        List
     
       userVoList=new ArrayList<>();        for (int i=0;i<5;i++){            UserVo userVo=new UserVo();            userVo.setName("张三"+i);            if(i!=3){                userVo.setAddressVoList(Arrays.asList(new AddressVo("上海"+i),new AddressVo("北京"+i)));            }            userVo.setAge(i*5);            if(i!=2){                userVo.setBirthday(DateTime.now().plusDays(i).toDate());            }            userVoList.add(userVo);        }        model.addAttribute("userList",userVoList);        return "userList";    }
     

 

 

freemarker模板

     
        <#list userList as user >            
                        <#--防止user里没有name-->                
              
                   
                        
姓名
                        
年龄
                        
地址
                        
生日
                        
操作
                   
              
      
       
        
${user.name!}
                        
${user.age!}
                        
                    <#--防止user的addressVoList为空-->                   <#list user.addressVoList!>                       <#items as address>                           ${address.name!} <#sep >,                       
                             <#else >无地址                   
                         
                        
                    ${(user.birthday?string("yyyy-MM-dd"))!"日期不存在"}                
                        
                    <#if user?is_even_item>偶数                    <#else> 奇数                    
                             ${user?counter}        
                   
                         
     

 

展示：

 

 1、freemarker格式化日期防止为空导致异常。

 2、freemark遍历列表防止值为空导致异常。