javaBean转为json

一个测试用例

javabean转json

    @Test

    @Rollback(false)

    public void policyQueryTest() throws Exception {

        // 查询数据

        String id = "402892816136971701613699f23f0002";

        DmPolicy tem = policyService.queryPolicy(id);

        System.out.println("1111111111111111111111111111111111111111111111111111");

        ObjectMapper mapper = new ObjectMapper();
        //javabean转json

        String jsonString = mapper.writeValueAsString(tem);

        System.out.println(jsonString);

        System.out.println("1111111111111111111111111111111111111111111111111111");

    }

}

json转 javabean

DmPolicy zz = mapper.readValue(jsonString, DmPolicy.class);