springboot中配置restTemplate及简单使用

一、引入web的starter

确保classpath中含有

compile("org.springframework.boot:spring-boot-starter-web")

二、配置restTemplate的Bean

    @Bean    public RestTemplate restTemplate() {        RestTemplateBuilder restTemplateBuilder = new RestTemplateBuilder();        return restTemplateBuilder.build();    }

三、自己简单封装的工具类

package com.kingboy.common.utils.restTemplate;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.HttpEntity;import org.springframework.http.HttpHeaders;import org.springframework.http.MediaType;import org.springframework.stereotype.Component;import org.springframework.web.client.RestTemplate;import javax.annotation.Resource;import java.util.Map;/** * @Author kingboy * @Date 2017/7/21 下午3:19 * @Description RestClient is used to http请求 */@Componentpublic class RestKingClient {    @Resource    RestTemplate restTemplate;    /**     * get     * @param url 请求地址     * @param param  参数     * @param returnClass 返回类型     * @return     */    public <T> T get(String url, Class<T> returnClass, Map<String, ?> param) {        return restTemplate.getForObject(url, returnClass, param);    }    /**     * post     * @param url 请求地址     * @param param 参数     * @param returnClass 返回类型     * @param header 自定义的头信息     * @return     */    public <E> E post(String url, E param, Class<E> returnClass, Map<String, String> header) {        HttpHeaders headers = new HttpHeaders();        header.forEach((o1, o2) -> headers.set(o1, o2));        HttpEntity<E> httpEntity = new HttpEntity<E>(param,headers);        return restTemplate.postForObject(url, httpEntity, returnClass);    }    /**     * post     * @param url 请求地址     * @param param 参数     * @param returnClass 返回类型     * @return     */    public <E> E postByDefault(String url, E param, Class<E> returnClass) {        HttpHeaders headers = new HttpHeaders();        headers.setContentType(MediaType.APPLICATION_JSON);        headers.set("Accept", "application/json");        HttpEntity<E> httpEntity = new HttpEntity<E>(param,headers);        return restTemplate.postForObject(url, httpEntity, returnClass);    }}

四、使用示例模拟

public class User {    private String id;    private String telephone;    private String password;    //setter,getter}

package com.kingboy.sso.controller.rest;import com.kingboy.common.utils.apiresult.ApiResult;import com.kingboy.common.utils.restTemplate.RestKingClient;import com.kingboy.ssoservice.domain.user.User;import org.springframework.web.bind.annotation.*;import javax.annotation.Resource;import java.util.HashMap;import java.util.Map;/** * @Author kingboy * @Date 2017/7/21 下午2:04 * @Description RestTemplateController is used to 测试RestTemplate */@RestController@RequestMapping("/Rest")public class RestTemplateController {    @Resource    private RestKingClient restKingClient;    /**     * 通过Get提供信息     * @return     */    @GetMapping("/GetUser")    public User getUserForRest() {        //模拟假数据        return new User(1, "telephone", "password");    }    /**     * 测试Get方式     * @param telephone     * @param password     * @return     */    @GetMapping("/GetUserFromRest/{telephone}/{password}")    public ApiResult getUserByRest(@PathVariable String telephone, @PathVariable String password) {        Map<String, String> param = new HashMap<>(2);        param.put("telephone", telephone);        param.put("password", password);        //参数仅是演示用途        User user = restKingClient.get("http://localhost:8080/Rest/GetUser", User.class, param);        return ApiResult.success(user);    }    /**     * 通过POST提供信息     * @return     */    @PostMapping("/PostUser")    public User postUserForRest(@RequestBody User user,@RequestHeader String Token) {        //模拟假数据        return new User(1, user.getTelephone(), user.getPassword());    }    /**     * 测试POST方式     * @param telephone     * @param password     * @return     */    @GetMapping("/PostUserFromRest/{telephone}/{password}")    public ApiResult postUserByRest(@PathVariable String telephone, @PathVariable String password) {        //设置头信息        Map<String, String> headers = new HashMap<>();        headers.put("ContentType", "application/json");        headers.put("Token", "mytoken");        //设置Body        User param = new User(null, telephone, password);        User user = restKingClient.post("http://localhost:8080/Rest/PostUser", param, User.class,headers);        return ApiResult.success(user);    }}