springmvc的标签库和和Jsr303验证
springmvc的标签库和和Jsr303验证
Spirngmvc的便签库
1.导入相对于的jar，此时我就不多说了，就是springmvc和sping的几个核心包
2.将对象存入到Model转发到页面上
3.引入相对于标签的头标签
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
4.编写相关的标签的库中的标签，即可以完成标签库的查询
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%--
springmvc的标签库已经其验证的执行的流程
1.首先引入相关的标题头
2.form.jsp页面的相关的写法
3.请求相关的后台的方法的书写
--%>
<form:form action="${pageContext.request.contextPath}/user/testJsr303" modelAttribute="user">
ID:<form:hidden path="uid"/><br>
姓名:<form:input path="uname"/><br>
<form:label path="pwd">密码:</form:label>
<form:password path="pwd"/><br/>
详情:<form:textarea path="remark"/><br>
<form:checkbox path="hobbies" value="1"/>打篮球
<form:checkbox path="hobbies" value="1"/>游泳
<form:checkbox path="hobbies" value="1"/>健身<br>
职务:<form:checkboxes path="jobs" items="${wlist}" itemLabel="wname" itemValue="wid"/><br>
<form:button>保存</form:button>
</form:form>
</body>
</html>
Jsr303验证
1.先再其结果上进行Valid验证
2.2.然后在实体的属性上对每一个属性进行验证
package cn.ujiuye.domain;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.NotNull;
import java.util.List;
/**
* @author liugang
* @date 2019/10/17
* User对象的实体类
*/
public class User {
private int uid;
@NotNull(message = "用户名不能为空")
private String uname;
@Length(min = 3,max = 8,message = "密码的长度介于3到6之间")
private String pwd;
private String remark;
private String hobbies;
@NotNull(message = "职务不能为空")
private List<Integer> jobs;
public User() {
}
public User(int uid, String uname) {
this.uid = uid;
this.uname = uname;
}
public int getUid() {
return uid;
}
public void setUid(int uid) {
this.uid = uid;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
public String getHobbies() {
return hobbies;
}
public void setHobbies(String hobbies) {
this.hobbies = hobbies;
}
public List<Integer> getJobs() {
return jobs;
}
public void setJobs(List<Integer> jobs) {
this.jobs = jobs;
}
@Override
public String toString() {
return "User{" +
"uid=" + uid +
", uname='" + uname + '\'' +
", pwd='" + pwd + '\'' +
", remark='" + remark + '\'' +
", hobbies='" + hobbies + '\'' +
", jobs=" + jobs +
'}';
}
}
3.在处理器的方法中通过BindingResult接收验证的错误信息,同时将通过@ModelAttribute注解将实体和验证后的错误信息返回到原页面上
4.在处理器方法中进行逻辑的判断,验证没有错误则跳转到其他的页面,如果错误将将错误的信息转发到当前的页面
@RequestMapping("/testJsr303")
private String testJsr303(Model model, @ModelAttribute("user") @Valid User user, BindingResult br){
if (br.hasErrors()){
//做逻辑的判读,如果有错误将跳转到本页面
List<Work> list = new ArrayList<Work>();
list.add(new Work(1,"程序员"));
list.add(new Work(2,"项目经理"));
list.add(new Work(3,"产品经理"));
model.addAttribute("wlist",list);
return "form";
}else {
//如果成功,则跳转到成功的页面
return "success";
}
}
5.5.错误信息通过error.jsp标签
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%--
springmvc的标签库已经其验证的执行的流程
1.首先引入相关的标题头
2.form.jsp页面的相关的写法
3.请求相关的后台的方法的书写
--%>
<form:form action="${pageContext.request.contextPath}/user/testJsr303" modelAttribute="user">
ID:<form:hidden path="uid"/><br>
姓名:<form:input path="uname"/><form:errors path="uname"/><br>
<form:label path="pwd">密码:</form:label>
<form:password path="pwd"/><form:errors path="pwd"/><br/>
详情:<form:textarea path="remark"/><br>
<form:checkbox path="hobbies" value="1"/>打篮球
<form:checkbox path="hobbies" value="1"/>游泳
<form:checkbox path="hobbies" value="1"/>健身<br>
职务:<form:checkboxes path="jobs" items="${wlist}" itemLabel="wname" itemValue="wid"/><form:errors path="jobs"/><br>
<form:button>保存</form:button>
</form:form>
</body>
</html>
6.对结果的信息的显示
