map转换成String到数据库存储

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";
    }
}