本篇我们来学习Spring MVC表单标签的使用，借助于Spring MVC提供的表单标签可以让我们在视图上展示WebModel中的数据更加轻松。
一.首先我们先做一个简单了例子来对Spring MVC表单表单标签的使用有一个大致的印象，然后再结合例子对各个标签介绍一下如何使用。
1.首先，在com.demo.web.models包中添加一个模型TagsModel内容如下：
package com.demo.web.models; import java.util.List; import java.util.Map; public class TagsModel{ private String username; private String password; private boolean testBoolean; private String[] selectArray; private String[] testArray; private Integer radiobuttonId; private Integer selectId; private List<Integer> selectIds; private Map<Integer,String> testMap; private String remark; public void setUsername(String username){ this.username=username; } public void setPassword(String password){ this.password=password; } public void setTestBoolean(boolean testBoolean){ this.testBoolean=testBoolean; } public void setSelectArray(String[] selectArray){ this.selectArray=selectArray; } public void setTestArray(String[] testArray){ this.testArray=testArray; } public void setRadiobuttonId(Integer radiobuttonId){ this.radiobuttonId=radiobuttonId; } public void setSelectId(Integer selectId){ this.selectId=selectId; } public void setSelectIds(List<Integer> selectIds){ this.selectIds=selectIds; } public void setTestMap(Map<Integer,String> testMap){ this.testMap=testMap; } public void setRemark(String remark){ this.remark=remark; } public String getUsername(){ return this.username; } public String getPassword(){ return this.password; } public boolean getTestBoolean(){ return this.testBoolean; } public String[] getSelectArray(){ return this.selectArray; } public String[] getTestArray(){ return this.testArray; } public Integer getRadiobuttonId(){ return this.radiobuttonId; } public Integer getSelectId(){ return this.selectId; } public List<Integer> getSelectIds(){ return this.selectIds; } public Map<Integer,String> getTestMap(){ return this.testMap; } public String getRemark(){ return this.remark; } }
2.其次，在包com.demo.web.controllers添加一个TagsController内容如下：
package com.demo.web.controllers; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import com.demo.web.models.TagsModel; @Controller @RequestMapping(value = "/tags") public class TagsController { @RequestMapping(value="/test", method = {RequestMethod.GET}) public String test(Model model){ if(!model.containsAttribute("contentModel")){ TagsModel tagsModel=new TagsModel(); tagsModel.setUsername("aaa"); tagsModel.setPassword("bbb"); tagsModel.setTestBoolean(true); tagsModel.setSelectArray(new String[] {"arrayItem 路人甲"}); tagsModel.setTestArray(new String[] {"arrayItem 路人甲","arrayItem 路人乙","arrayItem 路人丙"}); tagsModel.setRadiobuttonId(1); tagsModel.setSelectId(2); tagsModel.setSelectIds(Arrays.asList(1,2)); Map<Integer,String> map=new HashMap<Integer,String>(); map.put(1, "mapItem 路人甲"); map.put(2, "mapItem 路人乙"); map.put(3, "mapItem 路人丙"); tagsModel.setTestMap(map); tagsModel.setRemark("备注..."); model.addAttribute("contentModel", tagsModel); } return "tagstest"; } }
3.最后，在views文件夹下添加视图tagstest.jsp内容如下：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form:form modelAttribute="contentModel" method="post"> input 标签：<form:input path="username"/><br/> password 标签：<form:password path="password"/><br/> 绑定boolean的checkbox 标签：<br/> <form:checkbox path="testBoolean"/><br/> 绑定Array的checkbox 标签：<br/> <form:checkbox path="testArray" value="arrayItem 路人甲"/>arrayItem 路人甲 <form:checkbox path="testArray" value="arrayItem 路人乙"/>arrayItem 路人乙 <form:checkbox path="testArray" value="arrayItem 路人丙"/>arrayItem 路人丙 <form:checkbox path="testArray" value="arrayItem 路人丁"/>arrayItem 路人丁<br/> 绑定Array的checkboxs 标签：<br/> <form:checkboxes path="selectArray" items="${contentModel.testArray}"/><br/> 绑定Map的checkboxs 标签：<br/> <form:checkboxes path="selectIds" items="${contentModel.testMap}"/><br/> 绑定Integer的radiobutton 标签：<br/> <form:radiobutton path="radiobuttonId" value="0"/>0 <form:radiobutton path="radiobuttonId" value="1"/>1 <form:radiobutton path="radiobuttonId" value="2"/>2<br/> 绑定Map的radiobuttons 标签：<br/> <form:radiobuttons path="selectId" items="${contentModel.testMap}"/><br/> 绑定Map的select 标签：<br/> <form:select path="selectId" items="${contentModel.testMap}"/><br/> 不绑定items数据直接在form:option添加的select 标签：<br/> <form:select path="selectId"> <option>请选择人员</option> <form:option value="1">路人甲</form:option> <form:option value="2">路人乙</form:option> <form:option value="3">路人丙</form:option> </form:select><br/> 不绑定items数据直接在html的option添加的select 标签：<br/> <form:select path="selectId"> <option>请选择人员</option> <option value="1">路人甲</option> <option value="2">路人乙</option> <option value="3">路人丙</option> </form:select><br/> 用form:option绑定items的select 标签：<br/> <form:select path="selectId"> <option/>请选择人员
原创文章，作者：Maggie-Hunter，如若转载，请注明出处：https://blog.ytso.com/tech/pnotes/11214.html