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當選項是字符串時，我在'select'中選擇正確的值時遇到問題。我無法在論壇中找到解決方案。選擇從控制器傳遞的選項
我在控制器中傳遞'kind'，我可以看到值很好，但只有整數字段在'select'中被正確選擇。用String的那些總是顯示第一個值，而不是'kind'中的一個傳遞。
我添加了代碼我認爲它可以幫助 任何人都可以幫忙嗎？
我的HTML代碼。該表格包含了許多「選擇」，但我留下了兩個，第一個作品，但第二個始終顯示的第一個選項：
<form role="form" th:action="@{/kind/update}" th:object="${kind}" method="post">
<div class="form-group col-md-4">
<label for="replicates">No. of Replicates</label>
<select id="replicates" class="form-control" style="width: 70%;" th:field="${kind.replicates}">
<option th:each="rep: ${replicatesnumber}" th:value="${rep}" th:text="${rep}"> </option>
</select>
</div>
<div class="form-group col-md-3">
<label for="substrate">Substrate</label>
<select id="substrate" class="form-control" th:field="${kind.substrate}">
<option th:each="substrate: ${substrates}" th:value="${substrate}" th:text="${substrate}"> </option>
</select>
</div>
<div class="box-footer">
<button type="submit" class="btn btn-primary">Save</button>
<a class="btn btn-primary" th:href="@{/division/edit/}+${kind.division.id}" role="button">Cancel</a>
</div>
</form>
控制器是這樣的：
@Controller
@RequestMapping("/kind")
public class KindController {
@Autowired
private KindService kindService;
@ModelAttribute("replicatesnumber")
public int[] getReplicates() {
int[] reps = new int[3];
reps[0] = 2;
reps[1] = 4;
reps[2] = 8;
return reps;
}
@ModelAttribute("substrates")
public List<String> getSubstrates() {
return Arrays.asList("BP", "PP", "TP", "OGM", "Sand");
}
@GetMapping(value= "/edit/{kindId}")
public String viewDivision(@PathVariable Integer kindId, Model model){
Kind kind= kindService.findById(kindId);
model.addAttribute("kind",kind);
return "kind_edit";
}
和實體：
@Entity
@Table(name = "kind", schema = "ostscourses")
public class Kind implements java.io.Serializable {
private Integer id;
private Division division;
private String name;
private Integer germinationDays;
private Integer firstCount;
private Integer replicates;
private Boolean dark;
private Integer chill;
private String temperature;
private String substrate;
private Integer noSeeds;
private List<Sample> samples;
public Kind() {
}
public Kind(Integer id, Division division) {
this.id = id;
this.division = division;
}
public Kind(Integer id, Division division, String name, Integer germinationDays, Integer firstCount, Integer replicates, Boolean dark, Integer chill, String temperature, String substrate, Integer noSeeds, List<Sample> samples) {
this.id = id;
this.division = division;
this.name = name;
this.germinationDays = germinationDays;
this.firstCount = firstCount;
this.replicates = replicates;
this.dark = dark;
this.chill = chill;
this.temperature = temperature;
this.substrate = substrate;
this.noSeeds = noSeeds;
this.samples = samples;
}
@Id
@Column(name = "id", unique = true, nullable = false)
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "division_id", nullable = false)
@JsonIgnore
public Division getDivision() {
return this.division;
}
public void setDivision(Division division) {
this.division = division;
}
@Column(name = "name", length = 25)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "germination_days")
public Integer getGerminationDays() {
return this.germinationDays;
}
public void setGerminationDays(Integer germinationDays) {
this.germinationDays = germinationDays;
}
@Column(name = "first_count")
public Integer getFirstCount() {
return this.firstCount;
}
public void setFirstCount(Integer firstCount) {
this.firstCount = firstCount;
}
@Column(name = "replicates")
public Integer getReplicates() {
return this.replicates;
}
public void setReplicates(Integer replicates) {
this.replicates = replicates;
}
@Column(name = "dark")
public Boolean getDark() {
return this.dark;
}
public void setDark(Boolean dark) {
this.dark = dark;
}
@Column(name = "chill")
public Integer getChill() {
return this.chill;
}
public void setChill(Integer chill) {
this.chill = chill;
}
@Column(name = "temperature", length = 10)
public String getTemperature() {
return this.temperature;
}
public void setTemperature(String temperature) {
this.temperature = temperature;
}
@Column(name = "substrate", length = 5)
public String getSubstrate() {
return this.substrate;
}
public void setSubstrate(String substrate) {
this.substrate = substrate;
}
@Column(name = "no_seeds")
public Integer getNoSeeds() {
return this.noSeeds;
}
public void setNoSeeds(Integer noSeeds) {
this.noSeeds = noSeeds;
}
@OneToMany(fetch = FetchType.LAZY, mappedBy = "kind")
@JsonIgnore
public List<Sample> getSamples() {
return this.samples;
}
public void setSamples(List<Sample> samples) {
this.samples = samples;
}
@Override
public int hashCode() {
int hash = 3;
hash = 47 * hash + Objects.hashCode(this.id);
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Kind other = (Kind) obj;
if (!Objects.equals(this.id, other.id)) {
return false;
}
return true;
}
@Override
public String toString() {
return "Kind{" + "id=" + id + ", name=" + name + ", germinationDays=" + germinationDays + ", firstCount=" + firstCount + ", replicates=" + replicates + ", dark=" + dark + ", chill=" + chill + ", temperature=" + temperature + ", substrate=" + substrate + ", noSeeds=" + noSeeds + '}';
}
}
大家好，我仍在爲此而苦苦掙扎。我已檢查控制器是否發送了正確的值，但在'select'中選擇的選項仍然是第一個選項，而不是通過購買控制器的選項。這是基本的還是我的問題難以理解？ – Nils