把项目里老大写的好用的工具类分享一下。觉得好用的拿去。
import
java.util.ArrayList;
import
java.util.List;
import
java.util.Map;
import
org.apache.http.HttpEntity;
import
org.apache.http.NameValuePair;
import
org.apache.http.client.config.RequestConfig;
import
org.apache.http.client.entity.UrlEncodedFormEntity;
import
org.apache.http.client.methods.CloseableHttpResponse;
import
org.apache.http.client.methods.HttpGet;
import
org.apache.http.client.methods.HttpPost;
import
org.apache.http.impl.client.CloseableHttpClient;
import
org.apache.http.impl.client.HttpClientBuilder;
import
org.apache.http.message.BasicNameValuePair;
import
org.apache.http.util.EntityUtils;
public
class
HttpUtilsTest {
//生成httpClient
private
static
final
CloseableHttpClient
httpClient
;
public
static
final
String
CHAESET
=
“utf-8”
;
static
{
RequestConfig
config
= RequestConfig.custom()
.setConnectTimeout(6000) //请求超时时间
.setSocketTimeout(6000) //响应超时时间
.build();
httpClient
= HttpClientBuilder.create()
.setDefaultRequestConfig(
config
)
.build();
}
public
static
String httpGet(String
url
)
throws
Exception {
return
httpGet(
url
,
null
);
}
public
static
String httpGet(String
url
, Map<String, String>
params
)
throws
Exception {
return
httpGet(
url
,
params
,
CHAESET
);
}
/**
*
*
@param
url
*
@param
params
*
@param
charset
*
@return
*
@throws
Exception
*/
public
static
String httpGet(String
url
, Map<String, String>
params
, String
charset
)
throws
Exception {
//构造
url
if
(
params
!=
null
&& !
params
.isEmpty()) {
List<NameValuePair>
pairs
=
new
ArrayList<NameValuePair>();
for
(Map.Entry<String, String>
entry
:
params
.entrySet()) {
if
(
entry
.getValue() !=
null
) {
pairs
.add(
new
BasicNameValuePair(
entry
.getKey(),
entry
.getValue()));
}
}
String
queryString
= EntityUtils.toString(
new
UrlEncodedFormEntity(
pairs
),
charset
);
if
(
url
.indexOf(
“?”
) != -1) {
url
+=
“&”
+
queryString
;
}
else
{
url
+=
“?”
+
queryString
;
}
}
//httpGet获取请求，返回数据
HttpGet
httpGet
=
new
HttpGet(
url
);
CloseableHttpResponse
response
=
httpClient
.execute(
httpGet
);
try
{
int
statusCode
=
response
.getStatusLine().getStatusCode();
if
(
statusCode
!= 200) {
httpGet
.abort();
throw
new
RuntimeException(
“httpClient: error status code:”
+
statusCode
);
}
HttpEntity
entity
=
response
.getEntity();
String
result
=
null
;
if
(
entity
!=
null
) {
result
= EntityUtils.toString(
entity
,
charset
);
}
EntityUtils.consume(
entity
);
return
result
;
}
finally
{
response
.close();
}
}
public
static
String httpPost(String
url
, HttpEntity
requestEntity
)
throws
Exception {
return
httpPost(
url
,
null
,
requestEntity
);
}
public
static
String httpPost(String
url
, Map<String, String>
params
, HttpEntity
requsetEntity
)
throws
Exception {
//构建
url
if
(
params
!=
null
&& !
params
.isEmpty()) {
List<NameValuePair>
pairs
=
new
ArrayList<NameValuePair>();
for
(Map.Entry<String, String>
entry
:
params
.entrySet()) {
if
(
entry
.getValue() !=
null
) {
pairs
.add(
new
BasicNameValuePair(
entry
.getKey(),
entry
.getValue()));
}
}
String
queryString
= EntityUtils.toString(
new
UrlEncodedFormEntity(
pairs
),
CHAESET
);
if
(
url
.indexOf(
“?”
) > 0) {
url
+=
“&”
+
queryString
;
}
else
{
url
+=
“?”
+
queryString
;
}
}
//httpPost请求获取数据
HttpPost
httpPost
=
new
HttpPost(
url
);
httpPost
.setEntity(
requsetEntity
);
CloseableHttpResponse
response
=
httpClient
.execute(
httpPost
);
try
{
int
statusCode
=
response
.getStatusLine().getStatusCode();
if
(
statusCode
!= 200) {
httpPost
.abort();
throw
new
RuntimeException(
“httpClient error status code:”
+
statusCode
);
}
HttpEntity
entity
=
response
.getEntity();
String
result
=
null
;
if
(
entity
!=
null
) {
result
= EntityUtils.toString(
entity
,
CHAESET
);
}
EntityUtils.consume(
entity
);
return
result
;
}
finally
{
response
.close();
}
}
}