httpClient发送post请求的demo

/**
 * 发送HttpClient
 * 
 */
public class HttpClientTest {

public static void main(String[] args) throws IOException {
delete();
}

public static void query() throws IOException {

CloseableHttpClient client = HttpClientBuilder.create().build();

HttpPost post = new HttpPost(
"http://localhost:7001/pa18shoplife/lifegame/ItemareaBag/query.do3");

Map map = new HashMap();
List list = new ArrayList();
list.add("41");
list.add("42");
map.put("ids", list);
map.put("pageNumber", "1");
map.put("pageSize", "5000");
String str = Utils.convertToString4Obj(map);
System.out.println(str);

respCallback(client, post, str);
}

public static void saveorupdate() throws IOException,
UnsupportedEncodingException, ClientProtocolException {
CloseableHttpClient client = HttpClientBuilder.create().build();

HttpPost post = new HttpPost(
"http://localhost:7001/pa18shoplife/lifegame/ItemareaBag/saveorupdate.do3");

List list = new ArrayList();

LifeGameItemareaBagDTO dto = new LifeGameItemareaBagDTO();
dto.setId(41);
dto.setRoleId(3);
dto.setGridbag("11111");
dto.setGridnum(3);
list.add(dto);

dto = new LifeGameItemareaBagDTO();
dto.setId(42);
dto.setRoleId(4);
dto.setGridbag("222222");
dto.setGridnum(3);
list.add(dto);

String jsOnStr= JSON.json(list);
System.out.println(jsonStr);
respCallback(client, post, jsonStr);
}

public static void delete() throws IOException,
UnsupportedEncodingException, ClientProtocolException {
CloseableHttpClient client = HttpClientBuilder.create().build();

HttpPost post = new HttpPost(
"http://localhost:7001/pa18shoplife/lifegame/ItemareaBag/delete.do3");
List> list = new ArrayList>();

Map map1 = new HashMap();
map1.put("id", "41");

Map map2 = new HashMap();
map2.put("id", "42");

list.add(map1);
list.add(map2);

String str = Utils.convertToString4Obj(list);
System.out.println(str);
respCallback(client, post, str);
}

private static void respCallback(CloseableHttpClient client, HttpPost post,
String str) throws IOException {
post.setEntity(new StringEntity(str, "utf-8"));

ByteArrayOutputStream bos = new ByteArrayOutputStream();
InputStream ins = null;
try {
CloseableHttpResponse resp = client.execute(post);
if (resp.getStatusLine().getStatusCode() == 200) {
ins = resp.getEntity().getContent();
IOUtils.copy(ins, bos);
System.out.println(new String(bos.toByteArray(), "UTF-8"));
} else {
System.out.println("error..............");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
IOUtils.closeQuietly(ins);
IOUtils.closeQuietly(bos);
client.close();
}
}

}

/**
 * 物品区域 --> 背包
 * 
 */
public class LifeGameItemareaBagDTO {

private long id;
private long roleId;
private String gridbag;
private int gridnum;

public long getId() {
return id;
}

public void setId(long id) {
this.id = id;
}

public long getRoleId() {
return roleId;
}

public void setRoleId(long roleId) {
this.roleId = roleId;
}

public String getGridbag() {
return gridbag;
}

public void setGridbag(String gridbag) {
this.gridbag = gridbag;
}

public int getGridnum() {
return gridnum;
}

public void setGridnum(int gridnum) {
this.gridnum = gridnum;
}

}

/**
 * 专用工具类
 * 
 */
public class Utils {

private static final Logger logger = LoggerFactory.getLogger(Utils.class);

/**
 * @param obj
 * @return 返回JSON字符串
 */
public static  String convertToString4Obj(T obj){

try {
return JSON.json(obj);
} catch (IOException e) {
e.printStackTrace();
}
return "{\"resultCode\":-500,\"msg\":\"不能把Obj变为JSON字符串.\"}";
}

/**
 * @param clazz
 * @param req
 * @return
 * @throws Exception
 * 
 * 根据请求的request 的 body 返回 clazz的list形式
 */
public static  List convertToListObject(Class clazz,
HttpServletRequest req) throws Exception{
return convertToListObject(clazz, toString(req));
}

/**
 * @param clazz
 * @param jsonStr
 * @return
 * 
 * 根据字符串返回clazz的list形式
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public static  List convertToListObject(Class clazz, String jsonStr)
throws Exception{
List retVal = new ArrayList();
if(StringUtils.isBlank(jsonStr)){
return retVal;
}
try {
Object obj = JSON.parse(jsonStr);
if (obj instanceof JSONArray) {
List

相关jar包：

commons-beanutils.jar
commons-collections-3.1.jar
commons-io-1.4.jar
commons-lang.jar
commons-logging.jar
dubbo-2.4.9.1.jar
httpclient-4.3.6.jar
httpcore-4.3.3.jar
javaee.jar
javassist-3.16.1-GA.jar
log4j-1.2.15.jar
slf4j-api-1.7.2.jar
slf4j-log4j12-1.7.2.jar