Java SpringMVC项目未在视图的表中显示mysql数据
我已经建立了一个maven、SpringMVCwebapp和crud项目。当我运行我的视图页面时,我的表不会显示数据库中的任何数据 我的控制器Java SpringMVC项目未在视图的表中显示mysql数据,java,mysql,spring,spring-mvc,Java,Mysql,Spring,Spring Mvc,我已经建立了一个maven、SpringMVCwebapp和crud项目。当我运行我的视图页面时,我的表不会显示数据库中的任何数据 我的控制器 import java.util.List; import javax.servlet.http.HttpServletRequest; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controll
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.eoh.imp.service.AssetService;
import com.eoh.imp.model.Asset;
@Controller
public class AssetController {
@Autowired
private AssetService assetService;
@RequestMapping(value = "/ManageAssets", method = RequestMethod.GET)
public ModelAndView newAsset(ModelAndView model) {
Asset asset = new Asset();
List<Asset> listAsset = assetService.listAsset();
model.addObject("asset", asset);
model.addObject("listAssets",listAsset);
model.setViewName("ManageInventory");
return model;
}
我的刀
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import com.eoh.imp.model.Asset;
@Repository
public class AssetDAOImpl implements AssetDAO {
@Autowired
private SessionFactory sessionFactory;
public void addAsset(Asset a) {
sessionFactory.getCurrentSession().saveOrUpdate(a);
}
public Asset updateAsset(Asset a) {
sessionFactory.getCurrentSession().update(a);
return a;
}
@SuppressWarnings("unchecked")
public List<Asset> listAsset() {
Session session = sessionFactory.getCurrentSession();
Criteria criteria = session.createCriteria(Asset.class);
return (List<Asset>)criteria.list();
}
看法
输出
数据库有1个资产
mysql>从资产中选择*
|id |类型|品牌|型号|序列号|采购日期|供应商|评论|寿命|
|1 |笔记本电脑|联想| ThinkPad W510 | | | | | | | | | | | | | | | |尝试使用c:out标签
<!-------------------------------------- ASSETS TABLE ---------------------------------------------->
<table class="table table-hover">
<tr>
<th>Asset Type</th>
<th>Asset Make</th>
<th>Asset Model</th>
<th>Serial Number</th>
<th>Date Of Purchase</th>
<th>Supplier</th>
<th>Comments</th>
<th>Life Span</th>
<th>Actions</th>
</tr>
<c:forEach var="assets" items="${listAssets}">
<tr>
<td><c:out value="${assets.getType()}"/></td>
<td><c:out value="${assets.getMake()}"/></td>
<td><c:out value="${assets.getModel()}"/></td>
<td><c:out value="${assets.getSerialNumber()}"/></td>
<td><c:out value="${assets.getDateOfPurchase()}"/></td>
<td><c:out value="${assets.getSupplier()}"/></td>
<td><c:out value="${assets.getComments()}"/></td>
<td><c:out value="${assets.getLifeSpan()}"/></td>
<td><a href="editAsset?id=${assets.getId()}"
class="btn btn-info col-lg-6"><span
class="glyphicon glyphicon-pencil" aria-hidden="true"></span></a> <a
href="deleteAsset?id=${assets.getId()}"
class="btn btn-danger col-lg-6"><span
class="glyphicon glyphicon-trash" aria-hidden="true"></span></a></td>
</tr>
</c:forEach>
在JSP EL中,您不会这样调用该方法,而是使用属性名,或者如果它是一个名为Getting的方法,则编写asset.thing: ${assets.getType}错误 ${assets.type}正确
编辑:这行吗 在表达式语言中,应该有变量名,如下所示 像这样固定了!!!!! 问题出现在my web.xml中,缺少以下内容:
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"
谢谢你的帮助你试过调试吗?存储在模型中的listAsset是否为空?listAsset不为空。但是当我放置一个c标记来测试listAssets是否为空时,表不会显示;对我愿意。添加了-System.out.printlnlistAsset.get0;-在那之后。输出:id=1,type=Laptop,make=Lenovo,model=ThinkPad W510,serialnumber=,dateofpurchase=null,supplier=,comments=,lifespan=null谢谢…尝试过,但输出相同。奇怪。。我每天都这么做:你有没有试过把它和c:out标签结合起来?在答案中检查我的变化
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"