500內部服務器錯誤-Java WebApp

Question

我對Java Webapp開發比較陌生。 我在開發應用程序時使用Maven，Wildfly和mySQL。

我被困住了，因為當我在webapp中輸入數據時，它不會保存到數據庫中。 我嘗試使用Firebug識別錯誤，並且狀態代碼為“ 500內部錯誤”。 我在WEB-INF和JAX-RS批注中有我的beans.xml，我似乎無法識別問題。 請幫忙。

我的beans.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans 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/beans_1_0.xsd">
</beans> 

我的對象類是：

package com.Malison.job.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.ws.rs.FormParam;


import com.Malison.common.model.BaseEntity;


@Entity
@Table
public class Job extends BaseEntity {
private static final long serialVersionUID = 1L;

@FormParam ("client")
@Column
private String client;

@FormParam ("location")
@Column (name = "Loaded_From")
private String loadedFrom;

@FormParam ("destination")
@Column
private String destination;

@Column
private int distance;

@FormParam ("product")
@Column
private String product;

@FormParam ("quantity")
@Column (name = "Quantity_Loaded")
private int quantityloaded;

@FormParam ("rate")
@Column (name = "Rate_of_Transport")
private int rateOfTransport;

@Column
private int amount = rateOfTransport * distance;

@FormParam ( "delivery")
@Column (name = "Delivery_Note_Number")
private int deliveryNoteNo;


@XmlElement (name = "distance")
public double getDistance() {
    return distance;
}

public void setDistance(int distance) {
    this.distance = distance;
}

public String getClient() {
    return client;
}


public void setClient(String client) {
    this.client = client;
}


public String getProduct() {
    return product;
}


public void setProduct(String product) {
    this.product = product;
}
public double getAmount() {
    return amount;
}


public String getLoadedFrom() {
    return loadedFrom;
}

public void setLoadedFrom(String loadedFrom) {
    this.loadedFrom = loadedFrom;
}


public String getDestination() {
    return destination;
}

public void setDestination(String destination) {
    this.destination = destination;
}


public long getQuantityloaded() {
    return quantityloaded;
}

public void setQuantityloaded(int quantityloaded) {
    this.quantityloaded = quantityloaded;
}

public long getRateOfTransport() {
return rateOfTransport;
}

public void setRateOfTransport(int rateOfTransport) {
    this.rateOfTransport = rateOfTransport;
}


public long getDeliveryNoteNo() {
    return deliveryNoteNo;
}

public void setDeliveryNoteNo(int deliveryNoteNo) {
    this.deliveryNoteNo = deliveryNoteNo;
}




}

而我的堅持班：

package com.Malison.job.restws;



import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;




import org.jboss.resteasy.annotations.Form;




@Path("/job") // http://localhost:8085/malison/api/job
public class JobApi {

    @PersistenceUnit
    private EntityManagerFactory emf;

    @POST
    @Path("/create") // http://localhost:8085/malison/api/job/create
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    public String create(@Form com.Malison.job.model.Job job){

        EntityManager em = emf.createEntityManager();
        try {
            em.getTransaction().begin();
            em.merge(job);
            em.getTransaction().commit();
        } catch (Exception e) {
            em.getTransaction().rollback();
            return "{\"success\":false, \"msg\":\"Error occured, please  try later\"}";
        }

        return "{\"success\":true, \"msg\": \"Saved successfully\"}";

    }


}

在Firebug日志上給出以下消息：

處理請求上下文上下文時出錯：/ malison

 Servlet Path: /api Path Info: /job/create Query String: null Stack Trace org.jboss.resteasy.spi.UnhandledException: java.lang.IllegalStateException: Transaction not active org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:76) org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:212) org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:149) org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:372) org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179) org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220) org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) javax.servlet.http.HttpServlet.service(HttpServlet.java:790) io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63) io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) java.lang.Thread.run(Thread.java:745) 

Answer 1

錯誤是因為這樣

org.jboss.resteasy.spi.UnhandledException：java.lang.IllegalStateException：事務未激活

交易尚未建立。 因此，如果要運行代碼。 您有兩種選擇：

1. 通過更改代碼來使用容器管理的事務來獲取管理器。 要么，

    @PersistenceContext EntityManager em; 

2. 應用程序管理的交易

    @PersistenceUnit private EntityManagerFactory emf; @Resource private UserTransaction utx; @POST @Path("/create") // http://localhost:8085/malison/api/job/create @Consumes(MediaType.APPLICATION_FORM_URLENCODED) public String create(@Form com.Malison.job.model.Job job){ EntityManager em = emf.createEntityManager(); try { utx.begin(); em.merge(job); utx.commit(); } catch (Exception e) { utx.rollback(); return "{\\"success\\":false, \\"msg\\":\\"Error occured, please try later\\"}"; } return "{\\"success\\":true, \\"msg\\": \\"Saved successfully\\"}"; }