Jsf Primefaces树堆栈溢出异常
我已经使用了标准的递归树代码来填充数据库中的树。但是我得到了这个错误,页面无法打开Jsf Primefaces树堆栈溢出异常,jsf,primefaces,tree,Jsf,Primefaces,Tree,我已经使用了标准的递归树代码来填充数据库中的树。但是我得到了这个错误,页面无法打开 Caused by: java.lang.StackOverflowError at org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:40) at org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:22) at org.primefaces
Caused by: java.lang.StackOverflowError
at org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:40)
at org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:22)
at org.primefaces.model.DefaultTreeNode.<init>(DefaultTreeNode.java:59)
at com.mesutemre.kitapislemleri.KitapListeTreeBean.createTree(KitapListeTreeBean.java:55)
原因:java.lang.StackOverflower错误
位于org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:40)
位于org.primefaces.model.TreeNodeChildren.add(TreeNodeChildren.java:22)
位于org.primefaces.model.DefaultTreeNode(DefaultTreeNode.java:59)
在com.mesutemre.kitapislemleri.kitaListeTreebean.createTree(kitaListeTreebean.java:55)
我在manegedbean中使用了这些代码
private static final long serialVersionUID = 1L;
@EJB
private KitaplarFacade service;
TreeNode root;
TreeNode yazarAd;
private static List<Kitaplar> entityList = new ArrayList<Kitaplar>();
private static List<Kitaplar> araEntitylist;
private Kitaplar kitap;
private List<Kitaplar> subEntitylist;
public KitapListeTreeBean() {
root = new DefaultTreeNode("Root", null);
yazarAd = new DefaultTreeNode("", root);
}
@PostConstruct
public void initialize() {
entityList = service.findAllKitaplar();
createTree(entityList, 10, yazarAd);
}
private void createTree(List<Kitaplar> liste, int id, TreeNode node) {
subEntitylist = subKitaplar(id);
for (Kitaplar k : subEntitylist) {
TreeNode childNode = new DefaultTreeNode(k.getKitapad(), node);
createTree(subEntitylist, k.getKitapID(), childNode);
}
}
public static List<Kitaplar> subKitaplar(int i) {
araEntitylist = new ArrayList<Kitaplar>();
for (Kitaplar k : getEntityList()) {
if (k.getKitapID() == i) {
araEntitylist.add(k);
}
}
return araEntitylist;
}
public static List<Kitaplar> getEntityList() {
return entityList;
}
public static void setEntityList(List<Kitaplar> entityList) {
KitapListeTreeBean.entityList = entityList;
}
public TreeNode getRoot() {
return root;
}
public void setRoot(TreeNode root) {
this.root = root;
}
private static final long serialVersionUID=1L;
@EJB
私人厨房服务;
树根;
特雷诺德·亚扎拉德;
私有静态列表entityList=new ArrayList();
私有静态列表AragentityList;
私人Kitaplar kitap;
私有列表子实体列表;
公共KitaListeTreebean(){
root=新的DefaultTreeNode(“root”,null);
yazarAd=新的DefaultTreeNode(“,根);
}
@施工后
公共无效初始化(){
entityList=service.findAllKitaplar();
createTree(entityList,10,yazarAd);
}
私有void createTree(列表列表、int-id、TreeNode节点){
subEntitylist=subKitaplar(id);
for(Kitaplar k:子实体列表){
TreeNode childNode=新的DefaultTreeNode(k.getKitapad(),节点);
createTree(subEntitylist,k.getKitapID(),childNode);
}
}
公共静态列表子Kitaplar(int i){
ArantityList=新的ArrayList();
for(Kitaplar k:getEntityList()){
if(k.getKitapID()==i){
a实体列表。添加(k);
}
}
返回实体列表;
}
公共静态列表getEntityList(){
返回实体列表;
}
公共静态void setEntityList(列表entityList){
KitaListTreebean.entityList=entityList;
}
公共树节点getRoot(){
返回根;
}
public void setRoot(TreeNode root){
this.root=根;
}
}
为了获取数据,我使用了JPA。为什么会出现此错误?是关于服务器设置还是我的代码?为了解决递归永无止境问题,您应该装入新变量,如childID
class Kitaplar {
private int kitapID;
private int childID;
public Kitaplar(int kitapID, int childID){
this.kitapID = kitapID;
this.childID = childID;
}
public int getChildID() {
return childID;
}
public void setChildID(int childID) {
this.childID = childID;
}
public int getKitapID() {
return kitapID;
}
public void setKitapID(int kitapID) {
this.kitapID = kitapID;
}
}
主类
public class App {
public static List<Kitaplar> dummy;
public static void main(String[] args) {
dummy = new ArrayList<Kitaplar>();
dummy.add(new Kitaplar(10, 11));
dummy.add(new Kitaplar(11, 12));
dummy.add(new Kitaplar(12, 13));
createTree(10);
}
public static void createTree(int childID) {
List<Kitaplar> subEntitylist = subKitaplar(childID);
for (Kitaplar k : subEntitylist) {
createTree(k.getChildID());
}
}
public static List<Kitaplar> subKitaplar(int i) {
List<Kitaplar> araEntitylist = new ArrayList<Kitaplar>();
for (Kitaplar k : dummy) {
if (k.getKitapID() == i) {
araEntitylist.add(k);
}
}
return araEntitylist;
}
}
公共类应用程序{
公共静态列表;
公共静态void main(字符串[]args){
dummy=新的ArrayList();
添加(新Kitaplar(10,11));
添加(新Kitaplar(11,12));
添加(新Kitaplar(12,13));
createTree(10);
}
公共静态void createTree(int-childID){
List subEntitylist=subKitaplar(childID);
for(Kitaplar k:子实体列表){
createTree(k.getChildID());
}
}
公共静态列表子Kitaplar(int i){
List AragentityList=新建ArrayList();
用于(Kitaplar k:虚拟){
if(k.getKitapID()==i){
a实体列表。添加(k);
}
}
返回实体列表;
}
}
谢谢。现在作者和书名一个接一个提交。我想展示一位作者和他的书