Question

我一直盯着这个问题太久了。执行.list（）行时，spring会抛出一个关于.add的异常（Restrictions.in（“LocationCode”，locations）） java.util.Arrays $ ArrayList无法强制转换为java.lang.String。

Restrictions.in期待（string，Object []）no ??

有人可以指出我在传入Restrictions.in时错过了什么吗？

public List getIDsByDivision(String SelectedAccountCode,
        List SelectedDivision, String SelectedLocation) {
    List IDs=null;
    String result="--Select--";
    Session session=null;


    String[] locations=SelectedLocation.split(",");



    try
    {

        session=sessionFactory.openSession();
        if(null!=SelectedAccountCode && !SelectedAccountCode.equals("--Select--") 
                &&SelectedDivision.size()>0&&!SelectedDivision.equals("--Select--") 
                &&locations.length>0&&!SelectedLocation.equals("--Select--"))
        {

            IDs=session.createCriteria(Customer.class)
            // TODO fix this to location
            .setProjection(Projections.distinct(Projections.property("ID")))
            .add(Restrictions.eq("AcctCode", SelectedAccountCode))
            .add(Restrictions.eq("Division", SelectedDivision))
            .add(Restrictions.in("LocationCode", locations ))
            .list();

        }

客户类

package <removed>;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Customer {

@Id
private String ID;
@Column
private String Name;
private String AcctCode;
private String LocationCode;
private String Division;
private String ContactEmail;


public Customer(){}

public Customer(String iD, String name, String acctCode,
        String locationCode, String division, String contactEmail) {
    super();
    ID = iD;
    Name = name;
    AcctCode = acctCode;
    LocationCode = locationCode;
    Division = division;
    ContactEmail=contactEmail;
}



public String getID() {
    return ID;
}

public void setID(String iD) {
    ID = iD;
}

public String getName() {
    return Name;
}

public void setName(String name) {
    Name = name;
}

public String getAcctCode() {
    return AcctCode;
}

public void setAcctCode(String acctCode) {
    AcctCode = acctCode;
}

public String getLocationCode() {
    return LocationCode;
}

public void setLocationCode(String locationCode) {
    LocationCode = locationCode;
}

public String getDivision() {
    return Division;
}

public void setDivision(String division) {
    Division = division;
}

public String getContactEmail() {
    return ContactEmail;
}

public void setContactEmail(String contactEmail) {
    ContactEmail = contactEmail;
}


}

Answer 1

关于问题的半假性积极，下面的工作（我需要重构，但希望理解要点）：

    String[] locations=SelectedLocation.split(",");
    List<String> locs=new ArrayList<String>();
    for(String l:locations)
    {
    locs.add(l);
    }

...

该例外实际上指的是：

.add(Restrictions.in("Division", SelectedDivision))

（为了完整性而添加此内容）

.add(Restrictions.in("LocationCode", locs.toArray(new String[locs.size()]) ))

java.util.Arrays $ ArrayList不能在hibernate限制时强制转换为java.lang.String

1 个答案: