实体:
package com.ars.mybatis.car_book.entity;public class CarBrand { private static final long serialVersionUID = 1L;
/**
*厂牌ID
*/
private int brand_id;
public int getBrand_id() {
return brand_id;
}
public void setBrand_id(int brandId) {
brand_id = brandId;
}
/**
*厂牌名称
*/
private String brand_name;
public String getBrand_name() {
return brand_name;
}
public void setBrand_name(String brandName) {
brand_name = brandName;
}
}Action:
package com.ars.struts.car_book.action;import java.util.List;import com.ars.mybatis.car_book.entity.CarBrand;public class CbAction {
private static final long serialVersionUID = 1L;
private List<CarBrand> carbrands;
public List<CarBrand> getCarbrands() {
return carbrands;
}
public void setCarbrands(List<CarBrand> carbrands) {
this.carbrands = carbrands;
} /**
* 绑定厂牌
* @return String
* @exception Exception
*/
public String cbManage() throws Exception {
return "success";
}
}jsp:
<%@ page contentType="text/html;charset=GBK"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>test</title>
</head>
<body>
<s:form action="cbManage" namespace="/cb" id="form1">
<div>
<s:select list="carbrands"
listValue="brand_name"
listKey="brand_id"
name="carbrand"
id="carbrand"
headerKey="-l"
headerValue="厂牌"
></s:select>
</div>
</s:form>
</body>
</html>报错说:tag 'select', field 'list', name 'carbrand': The requested list key 'carbrands' could not be resolved as a collection/array/map/enumeration/iterator type.
package com.ars.mybatis.car_book.entity;public class CarBrand { private static final long serialVersionUID = 1L;
/**
*厂牌ID
*/
private int brand_id;
public int getBrand_id() {
return brand_id;
}
public void setBrand_id(int brandId) {
brand_id = brandId;
}
/**
*厂牌名称
*/
private String brand_name;
public String getBrand_name() {
return brand_name;
}
public void setBrand_name(String brandName) {
brand_name = brandName;
}
}Action:
package com.ars.struts.car_book.action;import java.util.List;import com.ars.mybatis.car_book.entity.CarBrand;public class CbAction {
private static final long serialVersionUID = 1L;
private List<CarBrand> carbrands;
public List<CarBrand> getCarbrands() {
return carbrands;
}
public void setCarbrands(List<CarBrand> carbrands) {
this.carbrands = carbrands;
} /**
* 绑定厂牌
* @return String
* @exception Exception
*/
public String cbManage() throws Exception {
return "success";
}
}jsp:
<%@ page contentType="text/html;charset=GBK"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>test</title>
</head>
<body>
<s:form action="cbManage" namespace="/cb" id="form1">
<div>
<s:select list="carbrands"
listValue="brand_name"
listKey="brand_id"
name="carbrand"
id="carbrand"
headerKey="-l"
headerValue="厂牌"
></s:select>
</div>
</s:form>
</body>
</html>报错说:tag 'select', field 'list', name 'carbrand': The requested list key 'carbrands' could not be resolved as a collection/array/map/enumeration/iterator type.
解决方案 »
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确保先set后执行Action,
或者,这样改 private List<CarBrand> carbrands = new ArrayList<CarBrand>();
出版社:<s:select name="book.chuBanShe.id" id="book.chuBanShe.id" list="chsList" listKey="id" listValue="name" headerKey="-1" headerValue="请选择爱好"></s:select><br />
作者:<s:select name="book.author.id" id="book.author.id" list="authorList" listKey="id" listValue="name" headerKey="-1" headerValue="请选择爱好"></s:select><br />
我的实体类public class Book implements Serializable { /**
*
*/
private static final long serialVersionUID = 1L; private long id;
private String name;
private double price;
private ChuBanShe chuBanShe;
private Author author; public Author getAuthor() {
return author;
} public void setAuthor(Author author) {
this.author = author;
} public ChuBanShe getChuBanShe() {
return chuBanShe;
} public void setChuBanShe(ChuBanShe chuBanShe) {
this.chuBanShe = chuBanShe;
} public long getId() {
return id;
} public void setId(long id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public double getPrice() {
return price;
} public void setPrice(double price) {
this.price = price;
}
}public class Author implements Serializable { /**
*
*/
private static final long serialVersionUID = 1L;
private long id;
private String name;
private String miaoShu; public long getId() {
return id;
} public void setId(long id) {
this.id = id;
} public String getMiaoShu() {
return miaoShu;
} public void setMiaoShu(String miaoShu) {
this.miaoShu = miaoShu;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
}public class ChuBanShe implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L; private long id ;
private String name;
private String pic ;
private String date; public String getDate() {
return date;
} public void setDate(String date) {
this.date = date;
} public long getId() {
return id;
} public void setId(long id) {
this.id = id;
} public String getPic() {
return pic;
} public void setPic(String pic) {
this.pic = pic;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
}
如何是的话,新建一个Action,ListAllCarbrandAction,把所有的carbrand找出来,放在list里面,然后传到页面上去;
Map request =(Map) ActionContext.getContext().get("request");
request.put("list", service.findAll());
jsp页面上 <s:select list="#request.list" ...