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SpringMVC和FreeMarker整合Hibernate-validator在页面渲染校验错误信息

2018-01-30 11:45 597 查看

1、整合背景

项目中使用了SpringMVC整合FreeMarker作为页面渲染，在后台管理端页面存在大量的form输入项，每个输入项在提交到Controller层时都需要对数据的有效性进行校验，工作量非常大而且繁琐。

2、校验框架

为了解决数据校验的问题，调研了一下Hibernate-validator，发现该框架功能非常的全面，能很好的解决我遇到的数据校验问题，官方文档：https://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/#validator-gettingstarted-createproject

Hibernate-validator 的优势：

支持校验规则分组

支持国际化错误消息

支持错误的fail-fast模式：https://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/#section-fail-fast

支持自定义校验注解

3、校验依赖包

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.3.5.Final</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>

4、示例代码

UserDemoDO .java

import com.jd.jdpetrol.dao.enums.YNEnum;
import org.apache.ibatis.type.Alias;
import org.hibernate.validator.constraints.NotBlank;

import javax.validation.constraints.NotNull;

@Alias("UserDemoDO")
public class UserDemoDO {

@NotNull
private Long id;

@NotBlank
private String name;

private YNEnum yn;

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public YNEnum getYn() {
return yn;
}

public void setYn(YNEnum yn) {
this.yn = yn;
}

@Override
public String toString() {
final StringBuffer sb = new StringBuffer("UserDemo{");
sb.append("id=").append(id);
sb.append(", name='").append(name).append('\'');
sb.append('}');
return sb.toString();
}

public static void main(String[] args) {
String str = "/abc";
if (str.startsWith("/")) {
System.out.println(str.substring(1));
}
}

}

import java.util.HashMap;
import java.util.Map;

/**
* Created by XFrame on 2016/1/29.
*/
public enum YNEnum {

VALID(1, "有效"),
INVALID(0, "无效");

YNEnum(Integer code, String desc) {
this.code = code;
this.desc = desc;
}

private Integer code;

private String desc;

private static Map<Integer, YNEnum> map = new HashMap<Integer, YNEnum>();

static {
for (YNEnum ele : values()) {
map.put(ele.code, ele);
}
}

public static YNEnum getByCode(Integer code) {
return map.get(code);
}

public Integer getCode() {
return code;
}

public String getDesc() {
return desc;
}

}

UserDemoController .java

@Controller
@RequestMapping("/demo")
public class UserDemoController {

@RequestMapping("/user2")
public String index(ModelMap model) {//UserDemoDO userVo

UserDemoDO userVo = new UserDemoDO();

model.addAttribute("userDemoDO", userVo);

return "userdemo/user2";
}

@RequestMapping(value = "/user", method = POST)
//@ResponseBody
public ModelAndView addUser(@Validated UserDemoDO user, BindingResult br) {

ModelAndView modelView = new ModelAndView();
modelView.setViewName("userdemo/user2");

//基础校验
if (br.hasErrors()) {

return modelView;
}
user.setYn(YNEnum.VALID);

//userDemoService.save(user);

return modelView;
}
}

5、FreeeMarker 页面

<!DOCTYPE html>

<html>
<head>
<meta charset="UTF-8">
<title>user demo</title>
<style>
.outer {
margin-top: 20px;
}
</style>
</head>
<body>

<#import "/spring.ftl" as spring/>

<div class="outer">
<form action="/demo/user/" name="user" method="post">

<@spring.bind "userDemoDO.id" />
用户Id：<input type="text" id="id" name="id"/> <br/>
<@spring.showErrors "<br>"/>

用户名：<input type="text" id="name" name="name"/> <br/>

<input type="submit" value="提交">

<br>
<#if userDemoDO??>

<@spring.bind "userDemoDO.id" />
<#--<@spring.showErrors "<br>"/>-->
<@spring.bind "userDemoDO.name" />

<#list spring.status.errorMessages as error> <b>${error}</b> <br> </#list>

<br>****************11****************<br>

<@spring.bind "userDemoDO.*" />

<@spring.showErrors "<br>"/>

</#if>
--------------------
<br>
<br>

=====================333========================
</form>

</div>

</body>
</html>

6、校验效果

7、解析错误信息的核心源代码

org.springframework.web.servlet.support.BindStatus

8、参考文章：

http://yunzhu.iteye.com/blog/2088548

http://hualong.iteye.com/blog/2038092

http://blog.csdn.net/fengyong7723131/article/details/54668905

PDF 文档下载：https://pan.baidu.com/s/1htA4BAG

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标签： Springmvc freemarker error validator

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