我使用JPA運行Spring MVC應用程序進行持久化。我有一個有更新按鈕的表單。當點擊這個按鈕時,它應該更新數據庫中的用戶記錄。用戶表中有嵌入的表格地址。我能夠訪問用戶表中的所有字段,但不能訪問嵌入表。這是我的請求映射從JPA嵌入表中POST訪問表單數據
@RequestMapping(value="/user/{userid}",method=RequestMethod.POST)
public String Update(@ModelAttribute("user")User user,@PathVariable("userid") String userid,Model model){
這是我User.java
@Entity
@Table(name="User")
public class User {
@Id
@Column(name = "userid")
private String id;
@Column(name="firstname")
private String firstname;
@Column(name="lastname")
private String lastname;
@Column(name="title")
private String title;
@Embedded
private Address address;
@ManyToMany
@JoinTable(name="phone_user", joinColumns={@JoinColumn(name="userid")},
inverseJoinColumns={@JoinColumn(name="phoneid")})
private List<Phone> phones;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public List<Phone> getPhones() {
return phones;
}
public void setPhones(List<Phone> phones) {
this.phones = phones;
}
} 注意地址字段的@Embedded標籤。 這裏是我的Address.java
@Embeddable
public class Address {
String street;
String city;
String state;
String zip;
@Column(name="street")
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
@Column(name="city")
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
@Column(name="state")
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
@Column(name="zip")
public String getZip() {
return zip;
}
public void setZip(String zip) {
this.zip = zip;
}
}
這裏是我的JSP它的形式發送數據
<html>
<head>
<title>Home</title>
</head>
<body>
<h1>
Hello world!
</h1>
<form method="POST" action="/cmpe275/user/${userid}">
<table>
<tr>
<td>Name</td>
<td><input type="text" readonly="readonly" name="userid" value="${id}"/></td>
</tr>
<tr><tr><tr><tr><tr><tr><tr><tr><tr>
<td>First Name</td>
<td><input type="text" name="firstname" value="${firstname}"/></td>
<td>Last Name</td>
<td><input type="text" name="lastname" value="${lastname}"/></td>
</tr>
<tr>
<tr><tr><tr><tr>
<td>Street</td>
<td><input type="text" name="street" value="${street}"/></td>
<td>City</td>
<td><input type="text" name="city" value="${city}"/></td>
<td>State</td>
<td><input type="text" name="state" value="${state}"/></td>
<td>Zip</td>
<td><input type="text" name="zip" value="${zip}"/></td>
</tr>
<tr><tr><tr><tr>
<td><input type="submit" onclick="updateUser();" name="Update" value="Update"/></td>
<td><input type="button" name="Delete" value="Delete"/></td>
</table>
</form>
</body>
<script>
function updateUser(){
console.log("hi");
}
</script>
</html>
我無法訪問使用的getter/setter方法的地址字段。 例如 - 在我的處理程序映射 - 要使用獲得更新的配置文件,我可以訪問它的名字:
user.getFirstName()
但如果我要訪問的更新地址我做了
user.getAddress.getCity()
我得到一個空值。 任何想法爲什麼?
你可以發佈一些客戶端代碼和請求的樣子? – denov