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);