（转）SpringMVC：提交数据遭遇基础类型和日期类型报400错误解决方法

原文地址：http://www.cnblogs.com/morlin/p/4382707.html?utm_source=tuicool&utm_medium=referral
使用SpringMVC开发的时候，页面如果有日期格式的数据，后台接受也是java.util.Date，则报告400错误 。下面是解决方案的演示示例：

这个是实体类，里面createDate就是java.util.Date类型

import java.util.Date;public class User {    private int userId;    private String userName;    private Date createDate;    public User() {}    public User(int userId, String userName, Date createDate) {        super();        this.userId = userId;        this.userName = userName;        this.createDate = createDate;    }    public User(String userName, Date createDate) {        super();        this.userName = userName;        this.createDate = createDate;    }    public int getUserId() {        return userId;    }    public void setUserId(int userId) {        this.userId = userId;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public Date getCreateDate() {        return createDate;    }    public void setCreateDate(Date createDate) {        this.createDate = createDate;    }    @Override    public String toString() {        return "User [createDate=" + createDate + ", userId=" + userId                + ", userName=" + userName + "]";    }}

页面代码

<form action="regUser" method="post">        userName:<input type="text" name="userName"/><br>        createDate:<input type="text" name="createDate"/><br>        double类型:<input type="text" name="dd"/><br>        <input type="submit" value="注册">    </form>

因为对于原生基本类型的form表单绑定，会出错。需要指定具体的类型编辑器。用法如下：首先在BaseController中增加方法initBinder，并使用注解@InitBinder标注，那么spring mvc在绑定表单之前，都会先注册这些编辑器。剩下的控制器都继承该类。CustomDateEditor spring自己已经提供了。代码如下：

import java.text.SimpleDateFormat;import java.util.Date;import org.springframework.beans.propertyeditors.CustomDateEditor;import org.springframework.stereotype.Controller;import org.springframework.web.bind.WebDataBinder;import org.springframework.web.bind.annotation.InitBinder;import sun.beans.editors.DoubleEditor;import sun.beans.editors.FloatEditor;import sun.beans.editors.IntEditor;import sun.beans.editors.LongEditor;@Controllerpublic class BaseController {    @InitBinder        public void initBinder(WebDataBinder binder) {            binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));         binder.registerCustomEditor(int.class, new IntEditor());        binder.registerCustomEditor(long.class, new LongEditor());          binder.registerCustomEditor(double.class, new DoubleEditor());          binder.registerCustomEditor(float.class, new FloatEditor());      }}

上面的代码不仅仅有日期格式的编辑器，还有基础类型的编辑器，这样就解决了SpringMVC中controller方法接受参数的时候，基础类型报错的问题了。

下面是测试用代码，继承BaseController之后就可以直接运行了。接受的参数有实体类和基础类型。

import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import com.kickstarter.entity.User;@Controller("userController")public class UserController extends BaseController{    @RequestMapping(value="regUser")    public String dateTest(User user , double dd){        System.out.println( user.toString() );        System.out.println( dd );        return "index";     }}

以上，问题解决。然后我们切换第二种方式，删除 BaseController 这个类，直接在User实体类中的 createDate字段上加上注解

import java.util.Date;import org.springframework.format.annotation.DateTimeFormat;public class User {    private int userId;    private String userName;    @DateTimeFormat(pattern="yyyy-MM-dd")    private Date createDate;    public User() {}    public User(int userId, String userName, Date createDate) {        super();        this.userId = userId;        this.userName = userName;        this.createDate = createDate;    }    public User(String userName, Date createDate) {        super();        this.userName = userName;        this.createDate = createDate;    }    public int getUserId() {        return userId;    }    public void setUserId(int userId) {        this.userId = userId;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public Date getCreateDate() {        return createDate;    }    public void setCreateDate(Date createDate) {        this.createDate = createDate;    }    @Override    public String toString() {        return "User [createDate=" + createDate + ", userId=" + userId                + ", userName=" + userName + "]";    }}

这样也可以解决日期格式报400问题。而且不管页面是否有数据都可以正常使用。