springMVC数据验证

最新推荐文章于 2024-11-13 11:56:39 发布

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#springMVC数据验证

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本文介绍如何使用JSR303规范进行数据验证，并结合Spring MVC实现请求参数的有效性检查。具体包括导入hibernate-validator库、在控制器中使用@Valid注解以及错误消息的处理。

导入JSR303jar

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hibernate Validator扩展注解

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在springmvc.xml中配置mvc:annotation-driven/，在处理方法中添加@valid注解。

@Component
public class Student{
	@Length(min =3,message = "最小长度为3")
	private String stuName;
	private String stuAiHao;
	private String stuSex;
	private Clazz slazz;
	public Student(String stuName, String stuAiHao, String stuSex, Clazz slazz) {
		super();
		this.stuName = stuName;
		this.stuAiHao = stuAiHao;
		this.stuSex = stuSex;
		this.slazz = slazz;
	}
	public Student() {
		super();
	}
	public String getStuName() {
		return stuName;
	}
	public void setStuName(String stuName) {
		this.stuName = stuName;
	}
	public String getStuAiHao() {
		return stuAiHao;
	}
	public void setStuAiHao(String stuAiHao) {
		this.stuAiHao = stuAiHao;
	}
	public String getStuSex() {
		return stuSex;
	}
	public void setStuSex(String stuSex) {
		this.stuSex = stuSex;
	}
	public Clazz getSlazz() {
		return slazz;
	}
	public void setSlazz(Clazz slazz) {
		this.slazz = slazz;
	}
	@Override
	public String toString() {
		return "Student [stuName=" + stuName + ", stuAiHao=" + stuAiHao + ", stuSex=" + stuSex + ", slazz=" + slazz
				+ "]";
	}
}

@RequestMapping(value = "/listadd",method = RequestMethod.POST)
	public String add(@ModelAttribute("student")@Valid Student sutdent,BindingResult result,Map<String,Object> map,HttpServletRequest request) {
		List<String> list12=new ArrayList<String>();
		System.out.println(result.getErrorCount());
		if(result.getErrorCount()>0) {
			for (ObjectError  error: result.getAllErrors()) {
			    list12.add(error.getDefaultMessage());
			}
			init(map, request);
			//将错误通过map传入jsp页面
			map.put("list5",list12);
			return "listadd";
		}
		service.add(sutdent);
		return "redirect:/index";
	}