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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); }}读到这里，这篇“SpringCloud Feign多参数传递的方法及需要注意哪些问题”文章已经介绍完毕，想要掌握这篇文章的知识点还需要大家自己动手实践使用过才能领会，如果想了解更多相关内容的文章，欢迎关注编程网行业资讯频道。
