使用CXF开发RestFul WebService问题解决方案
最近在项目中，因为几个系统自己需要数据交换，所以采用进来都比较流行的RestFul风格WebService，实现框架采用apache的cxf，apache的东西一直以来都是比较的好用，回话少说，进入正题。
首先，提出两个问题，已经解决方案，后面跟上代码。
1、cxf中如何实现java中泛型的数据序列化和反序列化（通常使用json、xml格式，cxf默认不支持泛型）
2、cxf后台异常，在前台如何反映
问题1答案比较简单，cxf中的数据序列化是可以替换掉使用你实现MessageBodyReader
问题2同样的比较简单，因为基于http的restful实现时，服务器返回数据的时候都会告诉客户端一个响应状态吗，就是我们常看到的200、404、500等，cxf框架的rs webservice客户端实现是通过判断状态大于等于300时，抛出异常webapplicationexception，所以如果服务器端有异常时，通过设置状态就可以实现，并返回Response（通过实现ExceptionMapper
代码：
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@XmlRootElement
(name=
"Customer"
)
public
class
Customer {
private
String id;
private
String name;
private
Date birthday;
public
String getId() {
return
id;
}
public
void
setId(String id) {
this
.id = id;
}
public
String getName() {
return
name;
}
public
void
setName(String name) {
this
.name = name;
}
public
Date getBirthday() {
return
birthday;
}
public
void
setBirthday(Date birthday) {
this
.birthday = birthday;
}
}
@XmlRootElement
(name=
"Me"
)
public
class
Me
implements
Serializable {
private
String name;
/**
* @return the name
*/
public
String getName() {
return
name;
}
/**
* @param name the name to set
*/
public
void
setName(String name) {
this
.name = name;
}
}
@XmlRootElement
(name =
"Page"
)
@XmlSeeAlso
({Customer.
class
,Me.
class
})
public
class
Page
implements
Serializable{
/**
*
*/
private
static
final
long
serialVersionUID = 5859907455479273251L;
public
static
int
DEFAULT_PAGE_SIZE =
10
;
private
int
pageSize = DEFAULT_PAGE_SIZE;
// 每页的记录数
private
long
start;
// 当前页第一条数据在List中的位置,从0开始
private
List
// 当前页中存放的记录,类型一般为List
private
long
totalCount;
// 总记录数
/**
* 构造方法，只构造空页.
*/
public
Page() {
this
(
0
,
0
, DEFAULT_PAGE_SIZE,
new
ArrayList
}
public
Page(
int
pageSize) {
this
(
0
,
0
, pageSize,
new
ArrayList
}
/**
* 默认构造方法.
*
* @param start
* 本页数据在数据库中的起始位置
* @param totalSize
* 数据库中总记录条数
* @param pageSize
* 本页容量
* @param data
* 本页包含的数据
*/
public
Page(
long
start,
long
totalSize,
int
pageSize, List
this
.pageSize = pageSize;
this
.start = start;
this
.totalCount = totalSize;
this
.data = data;
}
/**
* 取总记录数.
*/
public
long
getTotalCount() {
return
this
.totalCount;
}
/**
* 取总页数.
*/
public
long
getTotalPageCount() {
if
(totalCount % pageSize ==
0
)
return
totalCount / pageSize;
else
return
totalCount / pageSize +
1
;
}
/**
* 取每页数据容量.
*/
public
int
getPageSize() {
return
pageSize;
}
/**
* 取当前页中的记录.
*/
public
List
return
data;
}
/**
* 取该页当前页码,页码从1开始.
*/
public
long
getCurrentPageNo() {
return
start / pageSize +
1
;
}
/**
* 该页是否有下一页.
*/
public
boolean
hasNextPage() {
return
this
.getCurrentPageNo() <
this
.getTotalPageCount();
}
/**
* 该页是否有上一页.
*/
public
boolean
hasPreviousPage() {
return
this
.getCurrentPageNo() >
1
;
}
/**
* 获取任一页第一条数据在数据集的位置，每页条数使用默认值.
*
* @see #getStartOfPage(int,int)
*/
protected
static
int
getStartOfPage(
int
pageNo) {
return
getStartOfPage(pageNo, DEFAULT_PAGE_SIZE);
}
/**
* 获取任一页第一条数据在数据集的位置.
*
* @param pageNo
* 从1开始的页号
* @param pageSize
* 每页记录条数
* @return 该页第一条数据
*/
public
static
int
getStartOfPage(
int
pageNo,
int
pageSize) {
return
(pageNo -
1
) * pageSize;
}
@Override
public
String toString() {
return
ToStringBuilder.reflectionToString(
this
,
ToStringStyle.SHORT_PREFIX_STYLE);
}
/**
* @return the start
*/
public
long
getStart() {
return
start;
}
/**
* @param start the start to set
*/
public
void
setStart(
long
start) {
this
.start = start;
}
/**
* @return the data
*/
public
List
return
data;
}
/**
* @param data the data to set
*/
public
void
setData(List
this
.data = data;
}
/**
* @param pageSize the pageSize to set
*/
public
void
setPageSize(
int
pageSize) {
this
.pageSize = pageSize;
}
/**
* @param totalCount the totalCount to set
*/
public
void
setTotalCount(
long
totalCount) {
this
.totalCount = totalCount;
}
}
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public
class
ServiceException
extends
RuntimeException {
private
static
final
long
serialVersionUID = 7607640803750403555L;
public
ServiceException() {
super
();
}
public
ServiceException(String message) {
super
(message);
}
public
ServiceException(String message, Throwable cause) {
super
(message, cause);
}
public
ServiceException(Throwable cause) {
super
(cause);
}
}
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@Path
(value =
"/customer"
)
@Produces
({
"application/xml"
,
"application/json"
})
public
interface
CustomerService {
@GET
@Path
(value =
"/{id}/info"
)
Customer findCustomerById(
@PathParam
(
"id"
)String id);
@GET
@Path
(value =
"/search"
)
Customer findCustomerByName(
@QueryParam
(
"name"
)String name);
@POST
@Path
(value =
"/all"
)
List
@POST
@Path
(value =
"/page"
)
Page
throws
ServiceException;
@POST
@Path
(value =
"/pageMe"
)
Page
}
public
class
CustomerServiceImpl
implements
CustomerService {
public
Customer findCustomerById(String id) {
Customer customer =
new
Customer();
customer.setId(id);
customer.setName(id);
customer.setBirthday(Calendar.getInstance().getTime());
return
customer;
}
public
Customer findCustomerByName(String name) {
Customer customer =
new
Customer();
customer.setId(name);
customer.setName(name);
customer.setBirthday(Calendar.getInstance().getTime());
return
customer;
}
/** (non-Javadoc)
* @see edu.xdev.restful.CustomerService#findAllCustomer()
*/
@Override
public
List
List
new
LinkedList
Customer customer =
new
Customer();
customer.setId(
"e24234"
);
customer.setName(
"張三"
);
customer.setBirthday(Calendar.getInstance().getTime());
tar.add(customer);
customer =
new
Customer();
customer.setId(
"324324"
);
customer.setName(
"李四"
);
customer.setBirthday(Calendar.getInstance().getTime());
tar.add(customer);
return
tar;
}
/** (non-Javadoc)
* @see edu.xdev.restful.CustomerService#findPageCustomer()
*/
public
Page
throws
ServiceException {
List
new
LinkedList
Customer customer =
new
Customer();
customer.setId(
"e24234"
);
customer.setName(
"張三"
);
customer.setBirthday(Calendar.getInstance().getTime());
tar.add(customer);
customer =
new
Customer();
customer.setId(
"324324"
);
customer.setName(
"李四"
);
customer.setBirthday(Calendar.getInstance().getTime());
tar.add(customer);
Page
new
Page
1
,
2
,
1
, tar);
if
(
1
==
1
){
throw
new
ServiceException(
"abcd"
);
}
return
page;
}
/** (non-Javadoc)
* @see edu.xdev.restful.CustomerService#findPage()
*/
public
Page
List
new
LinkedList
Me m =
new
Me();
m.setName(
"中文"
);
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