map转换成String到数据库存储

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package com.fengshun.tst.entity;   import com.alibaba.fastjson.JSON; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;   import javax.annotation.Resource; import javax.transaction.Transactional; import java.util.HashMap; import java.util.Map;   @Transactional @RestController @RequestMapping("/sss/dict") public class TestController {     @Resource     TestService ts;         @GetMapping("/test")     public String test (){         Map<String, String> map = new HashMap<>();         map.put("123","456");         map.put("178", "789");         String str = JSON.toJSONString(map);         TestEntity t = new TestEntity();         t.setMap(str);         t.setId("1");         ts.save(t);         return "1111111";     }     @GetMapping("/test1")     public String test1 (){         TestEntity t = ts.findOne("1");         String map = t.getMap();         Map maps1 = (Map)JSON.parse(map);         System.out.println(maps1);         return "22";     } }