标签：email 空格 doctype 类型 artifact ati errors ceo group
springboot-2.3.0的 spring-boot-starter-web启动器好像不包含 spring-boot-starter-validation启动器，需要自己添加
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
pojo类：
public class Users { /*@NotNull(message = "userId不能为空")*/ @NotNull(message = "{userId.notnull}") private Integer userId; /*@NotBlank(message = "userName不能为空")*/ @NotBlank(message = "{userName.notnull}") private String userName; /*@NotBlank(message = "userSex不能为空")*/ @NotBlank(message = "{userSex.notnull}") private String userSex; /*@NotBlank(message = "password不能为空")*/ @NotBlank(message = "{password.notnull}") private String password; public Users(@NotNull Integer userId, @NotBlank String userName, @NotEmpty String userSex, @NotNull String password) { this.userId = userId; this.userName = userName; this.userSex = userSex; this.password = password; } public Users() { } public Integer getUserId() { return userId; } public void setUserId(Integer userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getUserSex() { return userSex; } public void setUserSex(String userSex) { this.userSex = userSex; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "Users{" + "userId=" + userId + ", userName=‘" + userName + ‘\‘‘ + ", userSex=‘" + userSex + ‘\‘‘ + ", password=‘" + password + ‘\‘‘ + ‘}‘; } }
错误信息可以自定义，通过注解的message属性自定义，有两种方式：
#用户ID不能为空 userId.notnull=\u7528\u6237ID\u4e0d\u80fd\u4e3a\u7a7a #用户姓名不能为空 userName.notnull=\u7528\u6237\u59d3\u540d\u4e0d\u80fd\u4e3a\u7a7a #用户性别不能为空 userSex.notnull=\u7528\u6237\u6027\u522b\u4e0d\u80fd\u4e3a\u7a7a #用户密码不能为空 password.notnull=\u7528\u6237\u5bc6\u7801\u4e0d\u80fd\u4e3a\u7a7a
controller类:
/* * * @Validated 对该对象进行数据校验 * * BindingResult：users对象校验不合法的信息 * * 如果有多个对象需要进行校验，那么每个对象后面都需要加bindingResult对象 * * SpringMvc会将users放到model对象中,防止前端报错。model中key的名称会使用对象的类型并且用驼峰规则来命名，可以通过@ModelAttribute自定义key * * */ @RequestMapping("/addUser") public String addUser(@ModelAttribute("u") @Validated Users users, BindingResult bindingResult) { //hasErrors()是否含有关于数据校验的错误信息 if(bindingResult.hasErrors()){ return "addUser"; } return "OK"; }
addUser.html:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html xmlns:th="http://www.thymeleaf.org"> <head> <link rel="shortcut icon" href="../resources/favicon.ico" th:href="@{/static/favicon.ico}"> <title>springbootjdbc</title> </head> <body> <form th:action="@{/user/addUser}" method="post"> @NotBlank-string：<input type="text" name="userName"><font color="red"><span th:errors="${u.userName}"></span></font><br> @NotNull-Integer：<input type="text" name="userId"><font color="red"><span th:errors="${u.userId}"></span></font><br> @NotEmpty-string：<input type="text" name="userSex"><font color="red"><span th:errors="${u.userSex}"></span></font><br> @NotNull-string：<input type="text" name="password"><font color="red"><span th:errors="${u.password}"></span></font><br> <input type="submit" value="OK"> </form> </body> </html>
controller类：
/* * BindingResult类型是针对于实体类的，这里无法使用，想要返回错误信息，需要配置全局异常信息页面 * */ @RequestMapping("/findUser") public String findUser(@NotBlank(message = "用户名不能为空") String userName) { System.out.println(userName); return "OK"; }
GlobalException类(全局异常类配置):
@Configuration public class GlobalException implements HandlerExceptionResolver { /* * httpServletRequest产生异常的请求对象 * httpServletResponse产生异常的响应对象 * handler此次产生异常的handler对象 * e 产生异常的异常对象 * */ @Override public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object handler, Exception e) { ModelAndView mv = new ModelAndView(); //判断不同异常类型，做不同视图跳转 if(e instanceof ConstraintViolationException){ mv.setViewName("findUser"); } mv.addObject("error", e.getMessage().split(":")[1]); return mv; } }
findUser.html:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html xmlns:th="http://www.thymeleaf.org"> <head> <link rel="shortcut icon" href="../resources/favicon.ico" th:href="@{/static/favicon.ico}"> <title>springbootjdbc</title> </head> <body> <form th:action="@{/user/findUser}" method="post"> userName：<input type="text" name="userName"><font color="red"><span th:text="${error}"></span></font><br> <input type="submit" value="OK"> </form> </body> </html>
标签：email 空格 doctype 类型 artifact ati errors ceo group
原文地址：https://www.cnblogs.com/activestruggle/p/12901535.html
