我在转换器中遇到新错误
javax.faces.component.UpdateModelException: java.lang.IllegalArgumentException: Cannot convert 5 of type class java.lang.Integer to class com.jpa.entity.Groups
at javax.faces.component.UIInput.updateModel(UIInput.java:839)
at javax.faces.component.UIInput.processUpdates(UIInput.java:722)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIForm.processUpdates(UIForm.java:270)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1239)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.IllegalArgumentException: Cannot convert 5 of type class java.lang.Integer to class com.jpa.entity.Groups
at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:397)
at com.sun.el.parser.AstValue.setValue(AstValue.java:194)
at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:286)
at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:124)
at javax.faces.component.UIInput.updateModel(UIInput.java:805)
5是GroupsID的值
我在http://balusc.blogspot.com/2007/09/objects-in-hselectonemenu.html阅读了教程 和http://www.javabeat.net/articles/15-introduction-to-jsf-core-tags-library-2.html 但我怎么能转换它？因为equals和hashcode方法我在类Groups
中被覆盖群组课程
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.jpa.entity;
import java.io.Serializable;
import java.util.List;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
/**
*
* @author KencyWindy
*/
@Entity
@Table(name = "groups")
@NamedQueries({
@NamedQuery(name = "Groups.findAll", query = "SELECT g FROM Groups g"),
@NamedQuery(name = "Groups.findByGroupid", query = "SELECT g FROM Groups g WHERE g.groupid = :groupid"),
@NamedQuery(name = "Groups.findByGroupname", query = "SELECT g FROM Groups g WHERE g.groupname = :groupname")})
public class Groups implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "groupid")
private Integer groupid;
@Basic(optional = false)
@Column(name = "groupname")
private String groupname;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "groups")
private List<TblUser> tblUserList;
public Groups() {
}
public Groups(Integer groupid) {
this.groupid = groupid;
}
public Groups(Integer groupid, String groupname) {
this.groupid = groupid;
this.groupname = groupname;
}
public Integer getGroupid() {
return groupid;
}
public void setGroupid(Integer groupid) {
this.groupid = groupid;
}
public String getGroupname() {
return groupname;
}
public void setGroupname(String groupname) {
this.groupname = groupname;
}
public List<TblUser> getTblUserList() {
return tblUserList;
}
public void setTblUserList(List<TblUser> tblUserList) {
this.tblUserList = tblUserList;
}
@Override
public int hashCode() {
int hash = 0;
hash += (groupid != null ? groupid.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Groups)) {
return false;
}
Groups other = (Groups) object;
if ((this.groupid == null && other.groupid != null) || (this.groupid != null && !this.groupid.equals(other.groupid))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.jpa.entity.Groups[groupid=" + groupid + "]";
}
}
TblUser Class
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.jpa.entity;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
*
* @author KencyWindy
*/
@Entity
@Table(name = "tbl_user")
@NamedQueries({
@NamedQuery(name = "TblUser.findAll", query = "SELECT t FROM TblUser t"),
@NamedQuery(name = "TblUser.findByUserid", query = "SELECT t FROM TblUser t WHERE t.userid = :userid"),
@NamedQuery(name = "TblUser.findByUsername", query = "SELECT t FROM TblUser t WHERE t.username = :username"),
@NamedQuery(name = "TblUser.findByPassword", query = "SELECT t FROM TblUser t WHERE t.password = :password"),
@NamedQuery(name = "TblUser.findByDob", query = "SELECT t FROM TblUser t WHERE t.dob = :dob"),
@NamedQuery(name = "TblUser.findByAddress", query = "SELECT t FROM TblUser t WHERE t.address = :address")})
public class TblUser implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@Column(name = "userid")
private Integer userid;
@Basic(optional = false)
@Column(name = "username")
private String username;
@Basic(optional = false)
@Column(name = "password")
private String password;
@Basic(optional = false)
@Column(name = "dob")
@Temporal(TemporalType.TIMESTAMP)
private Date dob;
@Basic(optional = false)
@Column(name = "address")
private String address;
@JoinColumn(name = "igroup", referencedColumnName = "groupid")
@ManyToOne(optional = false)
private Groups groups;
public TblUser() {
}
public TblUser(Integer userid) {
this.userid = userid;
}
public TblUser(Integer userid, String username, String password, Date dob, String address) {
this.userid = userid;
this.username = username;
this.password = password;
this.dob = dob;
this.address = address;
}
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 getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Groups getGroups() {
return groups;
}
public void setGroups(Groups groups) {
this.groups = groups;
}
public Integer getGroupID(){
return this.groups.getGroupid();
}
public void setGroupID(Integer iGroup){
this.groups = new Groups(iGroup);
}
@Override
public int hashCode() {
int hash = 0;
hash += (userid != null ? userid.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof TblUser)) {
return false;
}
TblUser other = (TblUser) object;
if ((this.userid == null && other.userid != null) || (this.userid != null && !this.userid.equals(other.userid))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.jpa.entity.TblUser[userid=" + userid + "]";
}
}
方法Grouplist
> public javax.faces.model.SelectItem[]
> getGroupList(){
> SelectItem[] options = null;
>
> List<Groups> iGroup = userBean.retrieveAllGroup();
> if(iGroup != null && iGroup.size() > 0){
> options = new SelectItem[iGroup.size()];
> int i = 0 ;
> for(Groups groups : iGroup){
> options[i++] = new SelectItem(groups.getGroupid(),
> groups.getGroupname());
> }
> }
>
> return options;
> }
JSF文件
<?xml version="1.0" encoding="UTF-8"?>
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
>
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>TODO supply a title</title>
</h:head>
<h:body>
<f:view>
<h:form>
<h1><h:outputText value="Create/Edit"/></h1>
<h:panelGrid columns="2">
<h:outputLabel value="Username" for="username" />
<h:inputText id="username" value="#{userController.user.username}" title="Username" required="true" requiredMessage="The Username field is required."/>
<h:outputLabel value="Password:" for="password" />
<h:inputText id="password" value="#{userController.user.password}" title="Password" required="true" requiredMessage="The Password field is required."/>
<h:outputLabel value="Dob:" for="dob" />
<h:inputText id="dob" value="#{userController.user.dob}" title="Dob" required="true" requiredMessage="The Dob field is required.">
<f:convertDateTime pattern="MM/dd/yyyy" />
</h:inputText>
<h:outputLabel value="Address:" for="address" />
<h:inputText id="address" value="#{userController.user.address}" title="Address" required="true" requiredMessage="The Address field is required."/>
<h:inputHidden/>
<h:selectOneMenu id="igroup" value="#{userController.user.groups}" title="Igroup" required="true" requiredMessage="The Igroup field is required.">
<!-- TODO: update below reference to list of available items-->
<f:selectItems value="#{userController.groupList}"/>
<f:converter converterId="javax.faces.Integer"/>
</h:selectOneMenu>
</h:panelGrid>
<h:commandButton value="Ok" action="#{userController.addUser}"/>
</h:form>
</f:view>
</h:body>
</html>
答案 0 :(得分：6)
我不知道你的JSF代码是怎样的，但我怀疑你正在使用
<h:selectOneMenu value="#{bean.group}">
而不是
<h:selectOneMenu value="#{bean.groupId}">
您的SelectItem[]包含Integer groupId作为项目值。然后，value的{{1}}属性必须与此类型匹配。异常消息正好说明了这一点。该值以h:selectOneMenu提交，但该bean期望Integer。