我正在使用java（Netbeans IDE）来创建restful服务。我从两个相关表中创建了两个实体claees。我也从模式中创造了宁静的服务。当我测试子表的HTTP GET方法（在本例中为Category）时，它提供来自子表和父表的数据，但我需要来自子表的数据，只有foreing键的列值。到目前为止的步骤如下：
我在mysql中创建了两个表 1）站点表
create table `revise`.site
(
siteId INT not null auto_increment primary key,
shortName VARCHAR(255),
longName VARCHAR(1024) ,
addressLineFirst VARCHAR(2024)l,
city VARCHAR(255) ,
state VARCHAR(255),
pincode VARCHAR(255),
country VARCHAR(255) ,
phoneNo VARCHAR(255),
mobileNo VARCHAR(255),
fax VARCHAR(255),
emailId VARCHAR(255),
logoSmall VARCHAR(1024),
logoBig VARCHAR(1024),
activeStatus VARCHAR(255),
action VARCHAR(255)
)
2）类别表
create table `revise`.category
(
categoryId INT not null auto_increment primary key,
siteId INT,
shortName VARCHAR(255),
longName VARCHAR(1024),
description VARCHAR(8000),
logoSmall VARCHAR(8000),
logoBig VARCHAR(8000),
CONSTRAINT fk_Site FOREIGN KEY (siteId) REFERENCES site(siteId) on delete cascade on update cascade
)
从这两个表中我创建了以下两个实体类 1）Site.java
@Entity
@Table(name = "site")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Site.findAll", query = "SELECT s FROM Site s"),
@NamedQuery(name = "Site.findBySiteId", query = "SELECT s FROM Site s WHERE s.siteId = :siteId"),
@NamedQuery(name = "Site.findByShortName", query = "SELECT s FROM Site s WHERE s.shortName = :shortName"),
@NamedQuery(name = "Site.findByLongName", query = "SELECT s FROM Site s WHERE s.longName = :longName"),
@NamedQuery(name = "Site.findByAddressLineFirst", query = "SELECT s FROM Site s WHERE s.addressLineFirst = :addressLineFirst"),
@NamedQuery(name = "Site.findByCity", query = "SELECT s FROM Site s WHERE s.city = :city"),
@NamedQuery(name = "Site.findByState", query = "SELECT s FROM Site s WHERE s.state = :state"),
@NamedQuery(name = "Site.findByPincode", query = "SELECT s FROM Site s WHERE s.pincode = :pincode"),
@NamedQuery(name = "Site.findByCountry", query = "SELECT s FROM Site s WHERE s.country = :country"),
@NamedQuery(name = "Site.findByPhoneNo", query = "SELECT s FROM Site s WHERE s.phoneNo = :phoneNo"),
@NamedQuery(name = "Site.findByMobileNo", query = "SELECT s FROM Site s WHERE s.mobileNo = :mobileNo"),
@NamedQuery(name = "Site.findByFax", query = "SELECT s FROM Site s WHERE s.fax = :fax"),
@NamedQuery(name = "Site.findByEmailId", query = "SELECT s FROM Site s WHERE s.emailId = :emailId"),
@NamedQuery(name = "Site.findByLogoSmall", query = "SELECT s FROM Site s WHERE s.logoSmall = :logoSmall"),
@NamedQuery(name = "Site.findByLogoBig", query = "SELECT s FROM Site s WHERE s.logoBig = :logoBig"),
@NamedQuery(name = "Site.findByActiveStatus", query = "SELECT s FROM Site s WHERE s.activeStatus = :activeStatus"),
@NamedQuery(name = "Site.findByAction", query = "SELECT s FROM Site s WHERE s.action = :action")})
public class Site implements Serializable {
@OneToMany(mappedBy = "siteId", fetch = FetchType.EAGER)
private List<Category> categoryList;
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "siteId")
private Integer siteId;
@Size(max = 255)
@Column(name = "shortName")
private String shortName;
@Size(max = 1024)
@Column(name = "longName")
private String longName;
@Size(max = 2024)
@Column(name = "addressLineFirst")
private String addressLineFirst;
@Size(max = 255)
@Column(name = "city")
private String city;
@Size(max = 255)
@Column(name = "state")
private String state;
@Size(max = 255)
@Column(name = "pincode")
private String pincode;
@Size(max = 255)
@Column(name = "country")
private String country;
@Size(max = 255)
@Column(name = "phoneNo")
private String phoneNo;
@Size(max = 255)
@Column(name = "mobileNo")
private String mobileNo;
// @Pattern(regexp="^\\(?(\\d{3})\\)?[- ]?(\\d{3})[- ]?(\\d{4})$", message="Invalid phone/fax format, should be as xxx-xxx-xxxx")//if the field contains phone or fax number consider using this annotation to enforce field validation
@Size(max = 255)
@Column(name = "fax")
private String fax;
@Size(max = 255)
@Column(name = "emailId")
private String emailId;
@Size(max = 1024)
@Column(name = "logoSmall")
private String logoSmall;
@Size(max = 1024)
@Column(name = "logoBig")
private String logoBig;
@Size(max = 255)
@Column(name = "activeStatus")
private String activeStatus;
@Size(max = 255)
@Column(name = "action")
private String action;
public Site() {
}
public Site(Integer siteId) {
this.siteId = siteId;
}
public Integer getSiteId() {
return siteId;
}
public void setSiteId(Integer siteId) {
this.siteId = siteId;
}
public String getShortName() {
return shortName;
}
public void setShortName(String shortName) {
this.shortName = shortName;
}
public String getLongName() {
return longName;
}
public void setLongName(String longName) {
this.longName = longName;
}
public String getAddressLineFirst() {
return addressLineFirst;
}
public void setAddressLineFirst(String addressLineFirst) {
this.addressLineFirst = addressLineFirst;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getPincode() {
return pincode;
}
public void setPincode(String pincode) {
this.pincode = pincode;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getPhoneNo() {
return phoneNo;
}
public void setPhoneNo(String phoneNo) {
this.phoneNo = phoneNo;
}
public String getMobileNo() {
return mobileNo;
}
public void setMobileNo(String mobileNo) {
this.mobileNo = mobileNo;
}
public String getFax() {
return fax;
}
public void setFax(String fax) {
this.fax = fax;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public String getLogoSmall() {
return logoSmall;
}
public void setLogoSmall(String logoSmall) {
this.logoSmall = logoSmall;
}
public String getLogoBig() {
return logoBig;
}
public void setLogoBig(String logoBig) {
this.logoBig = logoBig;
}
public String getActiveStatus() {
return activeStatus;
}
public void setActiveStatus(String activeStatus) {
this.activeStatus = activeStatus;
}
public String getAction() {
return action;
}
public void setAction(String action) {
this.action = action;
}
@Override
public int hashCode() {
int hash = 0;
hash += (siteId != null ? siteId.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 Site)) {
return false;
}
Site other = (Site) object;
if ((this.siteId == null && other.siteId != null) || (this.siteId != null && !this.siteId.equals(other.siteId))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.ikanksha.reviseplus.api.entity.Site[ siteId=" + siteId + " ]";
}
}
2）Category.java
@Entity
@Table(name = "category")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Category.findAll", query = "SELECT c FROM Category c"),
@NamedQuery(name = "Category.findByCategoryId", query = "SELECT c FROM Category c WHERE c.categoryId = :categoryId"),
@NamedQuery(name = "Category.findByShortName", query = "SELECT c FROM Category c WHERE c.shortName = :shortName"),
@NamedQuery(name = "Category.findByLongName", query = "SELECT c FROM Category c WHERE c.longName = :longName"),
@NamedQuery(name = "Category.findByDescription", query = "SELECT c FROM Category c WHERE c.description = :description"),
@NamedQuery(name = "Category.findByLogoSmall", query = "SELECT c FROM Category c WHERE c.logoSmall = :logoSmall"),
@NamedQuery(name = "Category.findByLogoBig", query = "SELECT c FROM Category c WHERE c.logoBig = :logoBig")})
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "categoryId")
private Integer categoryId;
@Size(max = 255)
@Column(name = "shortName")
private String shortName;
@Size(max = 1024)
@Column(name = "longName")
private String longName;
@Size(max = 8000)
@Column(name = "description")
private String description;
@Size(max = 8000)
@Column(name = "logoSmall")
private String logoSmall;
@Size(max = 8000)
@Column(name = "logoBig")
private String logoBig;
@OneToMany(mappedBy = "categoryId", fetch = FetchType.EAGER)
private List<Topic> topicList;
@JoinColumn(name = "siteId", referencedColumnName = "siteId")
@ManyToOne(fetch = FetchType.EAGER)
private Site siteId;
public Category() {
}
public Category(Integer categoryId) {
this.categoryId = categoryId;
}
public Integer getCategoryId() {
return categoryId;
}
public void setCategoryId(Integer categoryId) {
this.categoryId = categoryId;
}
public String getShortName() {
return shortName;
}
public void setShortName(String shortName) {
this.shortName = shortName;
}
public String getLongName() {
return longName;
}
public void setLongName(String longName) {
this.longName = longName;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getLogoSmall() {
return logoSmall;
}
public void setLogoSmall(String logoSmall) {
this.logoSmall = logoSmall;
}
public String getLogoBig() {
return logoBig;
}
public void setLogoBig(String logoBig) {
this.logoBig = logoBig;
}
public Site getSiteId() {
return siteId;
}
public void setSiteId(Site siteId) {
this.siteId = siteId;
}
@Override
public int hashCode() {
int hash = 0;
hash += (categoryId != null ? categoryId.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 Category)) {
return false;
}
Category other = (Category) object;
if ((this.categoryId == null && other.categoryId != null) || (this.categoryId != null && !this.categoryId.equals(other.categoryId))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.ikanksha.reviseplus.api.entity.Category[ categoryId=" + categoryId + " ]";
}
}
我得到了关于请求的json数据
http://localhost:8080/ReviseAPIDemo-war/webresources/categories/1
{
"categoryId": "1",
"description": "fdgfd",
"logoBig": "dfgf",
"logoSmall": "fgdf",
"longName": "lnhdr",
"shortName": "shrt",
"siteId": {
"addressLineFirst": "Vijapurroad",
"city": "Solapur",
"country": "India",
"emailId": "soni@dhb.com",
"fax": "834343443",
"logoBig": "biglogo",
"logoSmall": "small",
"longName": "DHB Soni College",
"mobileNo": "9898123844",
"phoneNo": "23203361",
"pincode": "413004",
"shortName": "DHB",
"siteId": "1",
"state": "Maharashtra"
}
}
但我需要回复
{
"categoryId": "1",
"description": "fdgfd",
"logoBig": "dfgf",
"logoSmall": "fgdf",
"longName": "lnhdr",
"shortName": "shrt",
"siteId": "1",
}
答案 0 :(得分：0)
您可以做的是加载Category实体（在您的JAX-RS资源中？）从相应的Site读取Id，然后创建一个所有属性为null的新Site对象，设置正确的siteId然后将其存储在Category对象。然后JSON marshaller应该只返回id。