Feign多参数传递及注意的问题
这边沿用前面的Eureka，Feign，Service
在服务提供者cloud-shop-userservice中新增几个方法
@PostMapping("/user")
public String aveUser(@RequestBody User user) {
logger.info("保存用户 :" +user.toString());
return "Success";
}
@GetMapping("/findUser")
public User findUserByNameAndPassword(String name ,String password) {
logger.info("name :"+name +"---password :" +password);
User user= new User();
user.setName(name);
user.setPassword(password);
return user;
}修改feign的UserService,新增对应的方法
package cn.sh.daniel.service;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import cn.sh.daniel.entity.User;
@FeignClient(value = "cloud-shop-userservice")
public interface UserService {
@GetMapping("/user/{id}")
public User findUserById(@PathVariable("id")Long id);
@PostMapping("/user/user")
public String aveUser(@RequestBody User user) ;
@GetMapping("/user/findUser")
public User findUserByNameAndPassword(String name ,String password);
}在feign的controller中调用方法
@PostMapping("/user")
public String aveUser(@RequestBody User user) {
return userService.aveUser(user);
}
@GetMapping("/findUser")
public User findUserByNameAndPassword(String name ,String password) {
return userService.findUserByNameAndPassword(name, password);
}重启修改过的服务,查看服务注册是否正常
在启动过程中可以发现Feign服务启动报错：
为什么会报错呢？
这个方法有两个参数，而Feign去映射的时候它不会去自动给你区分那个参数是哪个，会直接给你报错
解决方法：添加注解，自己去指定要映射的属性
重新启动Feign服务:
启动成功！！！！
使用工具调用这几个方法进行测试
成功调用两个方法！！！！
Feign如何接收多个参数
feigin多个参数POST情况下
method(String str1,String str2,String str3);
method2(String str1,@RequestParam Map<String, Object> map,String str3);1.API
package com.hwasee.hsc.api.redis;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import java.util.Map;
public interface RedisMapAPI {
//===============================Map===============================
@PostMapping("/redis/map/get")
String getMap(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item);
@PostMapping("/redis/map/getAll")
Map<Object, Object> getAllMap(@RequestParam(value = "key") String key);
@PostMapping("/redis/map/set")
Boolean setMap(@RequestParam(value = "key") String key, @RequestParam Map<String, Object> map);
@PostMapping("/redis/map/setMapAndTime")
Boolean setMapAndTime(@RequestParam(value = "key") String key, @RequestParam Map<String, Object> map, @RequestParam(value = "time") Long time);
@PostMapping("/redis/map/setMapItem")
Boolean setMapItem(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item, @RequestParam(value = "value") String value);
@PostMapping("/redis/map/setMapItemAndTime")
Boolean setMapItemAndTime(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item, @RequestParam(value = "value") String value, @RequestParam(value = "time") Long time);
@PostMapping("/redis/map/del")
void delMap(@RequestParam(value = "key") String key, @RequestParam(value = "items") Object[] items);
@PostMapping("/redis/map/hashKey")
Boolean mhashKey(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item);
@PostMapping("/redis/map/incr")
Double incrMap(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item, @RequestParam(value = "delta") Double delta);
@PostMapping("/redis/map/decr")
Double decrMap(@RequestParam(value = "key") String key, @RequestParam(value = "item") String item, @RequestParam(value = "delta") Double delta);
}
2.Feign
package com.hwasee.hsc.feign.redis;
import com.hwasee.hsc.api.redis.RedisMapAPI;
import com.hwasee.hsc.constants.ServiceConstants;
import org.springframework.cloud.openfeign.FeignClient;
@FeignClient(name = ServiceConstants.Services.SERVICE_REDIS)
public interface RedisMapFeign extends RedisMapAPI {
}
3.controller
如果实现了API就不用添加，没有实现就要添加
package com.hwasee.hsc.redis.controller;
import com.hwasee.hsc.redis.util.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Map;
import java.util.Set;
@RestController
@RequestMapping("/redis")
public class RedisController {
@Autowired
private RedisUtil redisUtil;
@Autowired
private RedisUtil.redisMap redisMap;
@Autowired
private RedisUtil.redisString redisString;
@Autowired
private RedisUtil.redisSet redisSet;
@Autowired
private RedisUtil.redisList redisList;
//===============================Common===============================
@PostMapping("/changeDatabase")
public void changeDatabase(Integer index){
redisUtil.changeDatabase(index);
}
@PostMapping("/expire")
public Boolean expire(String key, Long time) {
return redisUtil.expire(key, time);
}
@PostMapping("/getExpire")
public Long getExpire(String key) {
return redisUtil.getExpire(key);
}
@PostMapping("/hasKey")
public Boolean hasKey(String key) {
return redisUtil.hasKey(key);
}
@SuppressWarnings("unchecked")
@PostMapping("/del")
public void del(@RequestParam String[] keys) {
redisUtil.del(keys);
}
//===============================String===============================
@PostMapping("/string/get")
public String getString(String key) {
return redisString.get(key).toString();
}
@PostMapping("/string/set")
public Boolean setString(String key, String value) {
return redisString.set(key, value);
}
@PostMapping("/string/setValueAndTime")
public Boolean setValueAndTime(String key, String value, Long time) {
return redisString.set(key, value, time);
}
@PostMapping("/string/incr")
public Long incrString(String key, Long delta) {
return redisString.incr(key, delta);
}
@PostMapping("/string/decr")
public Long decrString(String key, Long delta) {
return redisString.decr(key, delta);
}
//===============================Map===============================
@PostMapping("/map/get")
public String getMap(String key, String item) {
return redisMap.get(key, item);
}
@PostMapping("/map/getAll")
public Map<Object, Object> getAllMap(String key) {
return redisMap.getAll(key);
}
@PostMapping("/map/set")
public Boolean setMap(String key, @RequestParam Map<String, Object> map) {
return redisMap.set(key, map);
}
@PostMapping("/map/setMapAndTime")
public Boolean setMapAndTime(@RequestParam String key,@RequestParam Map<String, Object> map,@RequestParam Long time) {
return redisMap.set(key, map, time);
}
@PostMapping("/map/setMapItem")
public Boolean setMapItem(String key, String item, String value) {
return redisMap.set(key, item, value);
}
@PostMapping("/map/setMapItemAndTime")
public Boolean setMapItemAndTime(String key, String item, String value, Long time) {
return redisMap.set(key, item,value, time);
}
@PostMapping("/map/del")
public void delMap(String key,@RequestParam Object[] items) {
redisMap.del(key, items);
}
@PostMapping("/map/hashKey")
public Boolean mhashKey(String key, String item) {
return redisMap.hasKey(key, item);
}
@PostMapping("/map/incr")
public Double incrMap(String key, String item, Double delta) {
return redisMap.incr(key, item, delta);
}
@PostMapping("/map/decr")
public Double decrMap(String key, String item, Double delta) {
return redisMap.decr(key, item, delta);
}
//===============================Set===============================
@PostMapping("/set/get")
public Set<Object> getSet(String key) {
return redisSet.get(key);
}
@PostMapping("/set/setValue")
public Long setValue(String key,@RequestParam Object[] values) {
return redisSet.set(key, values);
}
@PostMapping("/set/hashKey")
public Boolean hashKey(String key, String value) {
return redisSet.hasKey(key, value);
}
@PostMapping("/set/setValueAndTime")
public Long setValueAndTime(String key, Long time,@RequestParam Object[] values) {
return redisSet.set(key, time, values);
}
@PostMapping("/set/getSize")
public Long getSize(String key) {
return redisSet.getSize(key);
}
@PostMapping("/set/remove")
public Long remove(String key,@RequestParam Object[] values) {
return redisSet.remove(key, values);
}
//===============================List===============================
@PostMapping("/list/get")
public List<Object> get(String key, Long start, Long end) {
return redisList.get(key, start, end);
}
@PostMapping("/list/getSize")
public Long getListSize(String key) {
return redisList.getSize(key);
}
@PostMapping("/list/getByIndex")
public Object getByIndex(@RequestParam("key") String key, @RequestParam("index") Long index) {
return redisList.getByIndex(key, index);
}
@PostMapping("/list/setValue")
public Boolean setValue(String key, Object value) {
return redisList.set(key, value);
}
@PostMapping("/list/setValueAndTime")
public Boolean setValueAndTime(String key, Object value, Long time) {
return redisList.set(key, value, time);
}
@PostMapping("/list/setList")
public Boolean setList(String key, List<Object> value) {
return redisList.set(key, value);
}
@PostMapping("/list/setListAndTime")
public Boolean setListAndTime(String key, List<Object> value, Long time) {
return redisList.set(key, value, time);
}
@PostMapping("/list/updateByIndex")
public Boolean updateByIndex(String key, Long index, Object value) {
return redisList.updateIndex(key, index, value);
}
@PostMapping("/list/remove")
public Long remove(String key, Long count, Object value) {
return redisList.remove(key, count, value);
}
}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
