SpringBoot下的增删改查

需要临时写点后端代码，实现最基础的增删改查。

在已有的项目框架（Spring Boot）中，观察其他模块的实现，发现需要7个文件。

热心的同事还专门电话给我讲解spring的目录结构和层级关系。

整理记录。

目录结构

1
2
3
4
5
6
7
8
9
10
11
12
 
src/main
├──  java/com.geodaoyu
|    ├──  manager
|    |    ├──  data/model/MsgDialog.java
|    |    ├──  mapper/MsgDialogMapper.java
|    |    ├──  filter/MsgDialogFilter.java
|    |    └──  service
|    |         ├──  impls/MsgDialogServiceImpl.java
|    |         └──  MsgDialogService.java
|    └──  webcontroller/PortalManagerController.java
└──  resources/mapper
     └──  MsgDialogMapper.xml

层级关系

  • model层，数据库实体层，定义实体
  • dao层，数据持久层，访问数据库，向数据库发送sql语句
  • service层，业务逻辑层
  • controller层，控制层

model

相对路径：com/geodaoyu/manager/data/model/MsgDialog.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
package com.geodaoyu.manager.data.model;

/**
 * @descript: 消息提醒Model类
 * @author: zhanggy
 * @Date: 2018/08/21
 */
public class MsgDialog {
    private String msgId; //消息唯一标识标识
    private String sender; //发送人
    private String receiver; //接收人
    private String sendTime; //发送时间
    private String content; //发送内容
    private String state;  //消息状态
    private String readTime; //查看时间

    public String getMsgId() {
        return msgId;
    }

    public void setMsgId(String msgId) {
        this.msgId = msgId;
    }

    public String getSender() {
        return sender;
    }

    ...
}

IntelliJ IDEA 可以使用快捷键ALT+INSERT生成get和set。

filter

相对路径：com/geodaoyu/manager/filter/MsgDialogFilter.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
package com.geodaoyu.manager.filter;

/**
 * @descript: 消息提醒过滤类
 * @author: zhanggy
 * @Date: 2018/08/21
 */
public class MsgDialogFilter {
    private String msgId; //消息唯一标识标识
    private String receiver; //接收人
    private String sendTime; //发送时间
    private String content; //发送内容
    private String state;  //消息状态
    private String readTime; //查看时间
    private int startIndex; //起始索引
    private int endIndex; //终止索引

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    ...
}

model mapper

相对路径：com/geodaoyu/manager/data/mapper/MsgDialogMapper.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
package com.geodaoyu.manager.data.mapper;

import com.geodaoyu.manager.data.model.MsgDialog;
import com.geodaoyu.manager.filter.MsgDialogFilter;

import java.util.List;

public interface MsgDialogMapper {
    int insertMsg(MsgDialog msgDialog);
    int insertMsgs(List<MsgDialog> msgDialogs);
    int deleteMsg(MsgDialog msgDialog);
    int updateMsg(MsgDialog msgDialog);
    int updateMsgs(MsgDialog msgDialog);
    List<MsgDialog> selectMsgsByFilter(MsgDialogFilter filter);
    int selectMsgsCountByFilter(MsgDialogFilter filter);
}

service

相对路径：com/geodaoyu/manager/service/MsgDialogService.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
package com.geodaoyu.manager.service;

import com.geodaoyu.manager.data.model.MsgDialog;
import com.geodaoyu.manager.filter.MsgDialogFilter;

import java.util.List;

public interface MsgDialogService {
    int insertMsg(MsgDialog msgDialog);
    int insertMsgs(List<MsgDialog> msgDialogs);
    int deleteMsg(MsgDialog msgDialog);
    int updateMsg(MsgDialog msgDialog);
    int updateMsgs(MsgDialog msgDialog);
    List<MsgDialog> selectMsgsByFilter(MsgDialogFilter filter);
    int selectMsgsCountByFilter(MsgDialogFilter filter);
}

impl

相对路径：com/geodaoyu/manager/service/impls/MsgDialogServiceImpl.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
package com.geodaoyu.manager.service.impls;

import com.geodaoyu.manager.data.mapper.MsgDialogMapper;
...

/**
 * @descript:
 * @author: zhanggy
 * @Date: 2018/08/21
 */
@Service(value = "MsgDialogService")
public class MsgDialogServiceImpl implements MsgDialogService {

    @Autowired
    private MsgDialogMapper msgDialogMapper;

    /*
    插入单条消息
     */
    @Override
    public int insertMsg(MsgDialog msgDialog) {
        msgDialog.setMsgId(UUID.randomUUID().toString());
        MsgHandler msgHandler = new MsgHandler();
        msgHandler.sendMsg(msgDialog.getReceiver(), new TextMessage("message"));
        return msgDialogMapper.insertMsg(msgDialog);
    }

    /*
    批量插入消息
     */
    @Override
    public int insertMsgs(List<MsgDialog> msgDialogs) {
        MsgDialog msgDialog =  msgDialogs.get(0);
        MsgHandler msgHandler = new MsgHandler();
        msgHandler.sendMsg(msgDialog.getReceiver(), new TextMessage("message"));
        return msgDialogMapper.insertMsgs(msgDialogs);
    }

    /*
    根据MSGID删除消息
     */
    @Override
    public int deleteMsg(MsgDialog msgDialog) {
        return msgDialogMapper.deleteMsg(msgDialog);
    }

    /*
    更改消息状态
     */
    @Override
    public int updateMsg(MsgDialog msgDialog) {
        msgDialog.setState("已读");
        msgDialog.setReadTime(NowTime.GetTimeString2());
        return msgDialogMapper.updateMsg(msgDialog);
    }

    /*
    批量将所有未读更改为已读
     */
    @Override
    public int updateMsgs(MsgDialog msgDialog) {
        msgDialog.setState("已读");
        msgDialog.setReadTime(NowTime.GetTimeString2());
        return msgDialogMapper.updateMsgs(msgDialog);
    }

    /*
    根据接收者查询消息，按时间倒序排列
     */
    @Override
    public List<MsgDialog> selectMsgsByFilter(MsgDialogFilter filter) {
        return msgDialogMapper.selectMsgsByFilter(filter);
    }

    /*
    查询消息数量
     */
    @Override
    public int selectMsgsCountByFilter(MsgDialogFilter filter) {
        return msgDialogMapper.selectMsgsCountByFilter(filter);
    }
}

dao

相对路径：mapper/MsgDialogMapper.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.geodaoyu.manager.data.mapper.MsgDialogMapper">
    <resultMap id="BaseResultMap" type="com.geodaoyu.manager.data.model.MsgDialog">
        <id property="msgId" column="MSGID"  javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="sender" column="SENDER" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="receiver" column="RECEIVER" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="sendTime" column="SENDTIME" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="content" column="CONTENT" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="state" column="STATE" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="readTime" column="READTIME" javaType="java.lang.String" jdbcType="VARCHAR"/>
    </resultMap>

    <insert id="insertMsg" parameterType="com.geodaoyu.manager.data.model.MsgDialog">
        INSERT INTO
        w_message
        (
          MSGID,SENDER,RECEIVER,SENDTIME,CONTENT,STATE,READTIME
        )
        VALUES
        (
        #{msgId,jdbcType=VARCHAR},
        #{sender,jdbcType=VARCHAR},
        #{receiver,jdbcType=VARCHAR},
        #{sendTime,jdbcType=VARCHAR},
        #{content,jdbcType=VARCHAR},
        #{state,jdbcType=VARCHAR},
        #{readTime,jdbcType=VARCHAR}
        )
    </insert>

    <insert id="insertMsgs" parameterType="java.util.List" >
        INSERT ALL
        <foreach collection="list" item="item" separator="  ">
            INTO
            w_message
            (
            MSGID,SENDER,RECEIVER,SENDTIME,CONTENT,STATE,READTIME
            )
            VALUES
            (
            #{item.msgId,jdbcType=VARCHAR},
            #{item.sender,jdbcType=VARCHAR},
            #{item.receiver,jdbcType=VARCHAR},
            #{item.sendTime,jdbcType=VARCHAR},
            #{item.content,jdbcType=VARCHAR},
            #{item.state,jdbcType=VARCHAR},
            #{item.readTime,jdbcType=VARCHAR},
            )
        </foreach>
        select * from dual
    </insert>

    <delete id="deleteMsg" parameterType="com.geodaoyu.manager.data.model.MsgDialog">
        DELETE FROM
          w_message
        WHERE
          MSGID=#{msgId,jdbcType=VARCHAR}
     </delete>

    <update id="updateMsg" parameterType="com.geodaoyu.manager.data.model.MsgDialog">
        UPDATE
          w_message
        SET
          STATE=#{state,jdbcType=VARCHAR},
          READTIME=#{readTime,jdbcType=VARCHAR}
        WHERE
          MSGID=#{msgId,jdbcType=VARCHAR}
    </update>

    <update id="updateMsgs" parameterType="com.geodaoyu.manager.data.model.MsgDialog">
    UPDATE
      w_message
    SET
      STATE='已读',
      READTIME=#{readTime,jdbcType=VARCHAR}
    WHERE
      RECEIVER=#{receiver,jdbcType=VARCHAR}
      AND
      STATE='未读'
    </update>

    <select id="selectMsgsByFilter" parameterType="com.geodaoyu.manager.filter.MsgDialogFilter" resultMap="BaseResultMap">
        SELECT * FROM
        (
        SELECT r.*,ROWNUM oracleRN FROM
        (
        SELECT t.* FROM w_message t
        <trim prefix="WHERE" prefixOverrides="AND">
            <if test="receiver != null and receiver != ''">
                AND t.RECEIVER = #{receiver,jdbcType=VARCHAR}
            </if>
            <if test="state != null and state != ''">
                AND t.STATE  = #{state,jdbcType=VARCHAR}
            </if>
            <if test="content != null and content != ''">
                AND t.CONTENT LIKE CONCAT('%',CONCAT(#{content},'%'))
            </if>
        </trim>
        ORDER BY STATE DESC, SENDTIME DESC
        ) r
        )
        <trim prefix="WHERE" prefixOverrides="AND">
            <if test="startIndex != null and startIndex &gt; 0" >
                AND oracleRN &gt;= ${startIndex}
            </if>
            <if test="endIndex != null and endIndex &gt; 0" >
                AND oracleRN &lt;= ${endIndex}
            </if>
        </trim>
    </select>

    <select id="selectMsgsCountByFilter" parameterType="com.geodaoyu.manager.filter.MsgDialogFilter" resultType="java.lang.Integer">
        SELECT
        COUNT(*)
        FROM
        w_message t
        <trim prefix="WHERE" prefixOverrides="AND">
            <if test="receiver != null and receiver != ''">
                AND t.RECEIVER = #{receiver,jdbcType=VARCHAR}
            </if>
            <if test="state != null and state != ''">
                AND t.STATE  = #{state,jdbcType=VARCHAR}
            </if>
            <if test="content != null and content != ''">
                AND t.CONTENT LIKE CONCAT('%',CONCAT(#{content},'%'))
            </if>
        </trim>
    </select>
</mapper>

注意：oracle和pg的分页查询写法不同

controller

相对路径：com/geodaoyu/webcontroller/MsgDialogController.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
package com.geodaoyu.webcontroller;

import com.geodaoyu.manager.data.model.MsgDialog;
...

@Api(value="/msgDialog", description = "消息接口")
@Controller
@RequestMapping(value="/msgDialog")
@CrossOrigin
public class MsgDialogController {

    @Autowired
    private MsgDialogService msgDialogService;

    @Autowired
    private LogService logService;

    @RequestMapping(value="/insertMsg", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "添加消息",notes = "添加消息")
    @ApiImplicitParam(name = "msgDialog", value = "MsgDialog 模型", required = true)
    public Map insertMsgDialog(@RequestBody MsgDialog msgDialog) {
        Map map = new HashMap();
        int insertMsg = msgDialogService.insertMsg(msgDialog);
        map.put("insert", insertMsg);
        return map;
    }

    @RequestMapping(value="/deleteMsg", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "删除消息",notes = "删除消息")
    @ApiImplicitParam(name = "msgDialog", value = "MsgDialog 模型", required = true)
    public Map deleteMsgDialog(@RequestBody MsgDialog msgDialog) {
        Map map = new HashMap();
        int deleteMsg = msgDialogService.deleteMsg(msgDialog);
        map.put("delete", deleteMsg);
        return map;
    }

    @RequestMapping(value="/updateMsg", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "更改消息状态",notes = "更改消息状态")
    @ApiImplicitParam(name = "msgDialog", value = "MsgDialog 模型", required = true)
    public Map updateMsgDialog(@RequestBody MsgDialog msgDialog) {
        Map map = new HashMap();
        int updateMsg = msgDialogService.updateMsg(msgDialog);
        map.put("update", updateMsg);
        return map;
    }

    @RequestMapping(value="/updateMsgs", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "批量更改消息状态",notes = "批量更改消息状态")
    @ApiImplicitParam(name = "msgDialog", value = "MsgDialog 模型", required = true)
    public Map updateMsgDialogs(@RequestBody MsgDialog msgDialog) {
        Map map = new HashMap();
        int updateMsgs = msgDialogService.updateMsgs(msgDialog);
        map.put("update", updateMsgs);
        return map;
    }

    @RequestMapping(value="/select", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "按条件查询消息",notes = "按条件查询消息")
    @ApiImplicitParam(name = "msgDialogFilter", value = "msgDialogFilter 模型", required = true)
    public Map selectMsgsByFilter(@RequestBody MsgDialogFilter msgDialogFilter) {
        Map map = new HashMap();
        List<MsgDialog> pageData = msgDialogService.selectMsgsByFilter(msgDialogFilter);
        map.put("pageData", pageData);
        return map;
    }

    @RequestMapping(value="/selectCount", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    @ApiOperation(value = "按条件查询消息数量",notes = "按条件查询消息数量")
    @ApiImplicitParam(name = "msgDialogFilter", value = "msgDialogFilter 模型", required = true)
    public Map selectMsgsCountByFilter(@RequestBody MsgDialogFilter msgDialogFilter) {
        Map map = new HashMap();
        int count = msgDialogService.selectMsgsCountByFilter(msgDialogFilter);
        map.put("count", count);
        return map;
    }
}
posted @ 2021-03-18 19:40  李海家  阅读(181)  评论(0)  编辑  收藏  举报