[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; !-: a`Vs+
} f+d{^-
int i1=l; X;-,3dy
int i2=mid+1; a].Bn#AH!C
for(int cur=l;cur<=r;cur++){ ]UMwpL&rY
if(i1==mid+1) Od"-w<'
data[cur]=temp[i2++]; #GTmC|[
else if(i2>r) r/PsFv{8
data[cur]=temp[i1++]; n^'{{@&(v
else if(temp[i1] data[cur]=temp[i1++]; NKd):>d%
else 9[:nWp^
data[cur]=temp[i2++]; /wmJMX
} 9t=erhUr
} kG%<5QH
4*'NpqC(_
} <>-UPRwqI
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改进后的归并排序: )p&xpB(
]J~5{srq:
package org.rut.util.algorithm.support; U9Y'eP.2
u+{5c5_
import org.rut.util.algorithm.SortUtil; ]SK(cfA`
DK:d'zb
/** lk8VJ~2d
* @author treeroot YTY0N5["
* @since 2006-2-2 h1,J<B@
* @version 1.0 i`E]gJ$
*/ F|V?Z
public class ImprovedMergeSort implements SortUtil.Sort { t#kmtJC
kQ|}"Tw7
private static final int THRESHOLD = 10; |s|RJA1
X~lOFH;}q
/* sW[42A
* (non-Javadoc) MTr _8tI
* b%AYYk)d?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X!r!lW
*/ enZW2o97c
public void sort(int[] data) { ${`\In_?O
int[] temp=new int[data.length]; XxV]U{i!
mergeSort(data,temp,0,data.length-1); qbB.Z#w
} >GqIpfn
d ;ry!X
private void mergeSort(int[] data, int[] temp, int l, int r) { u K 8r
int i, j, k; .2OP>:9F
int mid = (l + r) / 2; NJn~XCq
if (l == r) gJ2R(YMF
return; RL($h4d9
if ((mid - l) >= THRESHOLD) G$ipWi
mergeSort(data, temp, l, mid); )5&Wt@7Kj`
else CKj3-rcF(
insertSort(data, l, mid - l + 1); InRn!~_N
if ((r - mid) > THRESHOLD) (Iu5QLE
mergeSort(data, temp, mid + 1, r); P^+Og_$
else *,mbZE=<
insertSort(data, mid + 1, r - mid); \}Hk`n)Aq
b@nbXm]Z
for (i = l; i <= mid; i++) { S&@~F|
temp = data; 6jom6/F 4
} B,}%1+*
for (j = 1; j <= r - mid; j++) { {?,:M
temp[r - j + 1] = data[j + mid]; (gz|6N
} ~bvx<:8*%
int a = temp[l]; vw3%u+Z&
int b = temp[r]; Bf[D&O
for (i = l, j = r, k = l; k <= r; k++) { GMd81@7
if (a < b) { O=ci"2!\-
data[k] = temp[i++]; M=@U]1n*c
a = temp; ==Ju2D?%
} else { f'*HP%+Y
data[k] = temp[j--]; >[ywrB ?T
b = temp[j]; PLwa!j
} ?DM-C5$
} fFMG9]*
} <[b\V+M
+HUI1@ql
/** (,HAOs
* @param data }?"f#bI
* @param l Dr<%Lr
* @param i 90M:0SH
*/ ]oZ$,2#;~
private void insertSort(int[] data, int start, int len) { ePB=aCZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e(j"u;=
} iQS?LksQX
} h(jg7R
} %/s:G)
} Onby=Y o6
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堆排序： L<J%IlcfO
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package org.rut.util.algorithm.support; >L)Xyq
v||8Q\d
import org.rut.util.algorithm.SortUtil; (eG#JVsm9
[K%Jt
/** [JsQ/|=z
* @author treeroot lLoFM
* @since 2006-2-2 uflp4_D
* @version 1.0 2=u5N[*
*/ 4d[:{/+Q
public class HeapSort implements SortUtil.Sort{ h?fv:^vSi
i5V ly'Q
/* (non-Javadoc) Pqx=j_st
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8%I4jL<
*/ 7S),:Uy[\
public void sort(int[] data) { RVX-3FvP
MaxHeap h=new MaxHeap(); ;w[|IRa
h.init(data); T3Qa[>+\
for(int i=0;i h.remove(); B3e{'14
System.arraycopy(h.queue,1,data,0,data.length); %q(n'^#Z.y
} LR'F/.Dx
5=5~GX-kr
private static class MaxHeap{ MhHygZT[}
&&TQ0w&T
void init(int[] data){ ad }^Dj/
this.queue=new int[data.length+1]; b[VP"KZ?
for(int i=0;i queue[++size]=data; .,UpI|b
fixUp(size); rEz=\yY^j'
} B4_0+K H
} X|@|ZRN
&nTB^MF
private int size=0; *_3+ DF
KGzBK:
private int[] queue; y~Sh|2x8v
.,<-lMC+
public int get() { ;g7nG{
return queue[1]; [u=b[(
} 5k<qJ9
Yc+/="&z
public void remove() { Mryi6XT
SortUtil.swap(queue,1,size--); i{!i%`"
fixDown(1); \} P}H
} OT\[qaK
file://fixdown r4D6g>)h1q
private void fixDown(int k) { l^WFMeMD3a
int j; ,B h[jb`y
while ((j = k << 1) <= size) { )#M*@e$k
if (j < size %26amp;%26amp; queue[j] j++; @tRq(*(/:
if (queue[k]>queue[j]) file://不用交换 2U)H2%
break; 66Huqo
SortUtil.swap(queue,j,k); R/A40i
k = j; ?:~Y%4;
} Skq%S`1%Q
} Ri"3o
private void fixUp(int k) { z9u"?vdA
while (k > 1) { XM>ByfD{
int j = k >> 1; \<]nv}1O
if (queue[j]>queue[k]) hA/K>Z
break; LH3PgGi,
SortUtil.swap(queue,j,k); _Z@- q
k = j; 0ppZ~}&
} #p6#,PZ
} 5<Xq7|Jt
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} Oy&Myjny<
IH'DCY:
} "#qyX[\
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SortUtil： 39BGwKXb
khyn4
package org.rut.util.algorithm; w<tr<Pu'
-{-w5_B$
import org.rut.util.algorithm.support.BubbleSort; `$fwLC3j
import org.rut.util.algorithm.support.HeapSort; <pK72
import org.rut.util.algorithm.support.ImprovedMergeSort; k#w[GL|T
import org.rut.util.algorithm.support.ImprovedQuickSort; 3;>|*(cO
import org.rut.util.algorithm.support.InsertSort; Kisd.~u8j
import org.rut.util.algorithm.support.MergeSort; I.euuzBgA
import org.rut.util.algorithm.support.QuickSort; Wu,'S;>C
import org.rut.util.algorithm.support.SelectionSort; bH~ue5q
import org.rut.util.algorithm.support.ShellSort; qR--lvO
7fgA)dU:K
/** wMT?p/9Blm
* @author treeroot OGzth$7A
* @since 2006-2-2 A|O7W|"W
* @version 1.0 x{6/di
*/ }2|>Y[v2j
public class SortUtil { rH8w||S2U
public final static int INSERT = 1; W]4Gs;
public final static int BUBBLE = 2; 3<AZ,gF1
public final static int SELECTION = 3; 9pb4!=g*
public final static int SHELL = 4; % tN{
public final static int QUICK = 5; ez"Xb 7
public final static int IMPROVED_QUICK = 6; Z1wN+Y.CA
public final static int MERGE = 7; ;%"UZ~]f
public final static int IMPROVED_MERGE = 8; o=X6PoJN_
public final static int HEAP = 9; {]n5h#c 5*
@K7#}7,t
public static void sort(int[] data) { ^EPM~cEY\
sort(data, IMPROVED_QUICK); p%jl-CC1
} 7^A;.x
private static String[] name={ Bq#?g@V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" weEmUw Z
}; %}MZWf{
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private static Sort[] impl=new Sort[]{ .>Gq/[c0|
new InsertSort(), AhZ8B'Ee
new BubbleSort(), l(-6pP5`
new SelectionSort(), k+f!)7_
new ShellSort(), :[ F`tDL
new QuickSort(), S>Z V8
new ImprovedQuickSort(), Ysz{~E'
new MergeSort(), )3V5P%Q
new ImprovedMergeSort(), HcXyU/>D
new HeapSort() FYFP6ti
}; \H!ECTI
hyH"
public static String toString(int algorithm){ n\Uh5P1W"
return name[algorithm-1]; ):
} #joGIw
ZqsI\"bj
public static void sort(int[] data, int algorithm) { CLg;
impl[algorithm-1].sort(data); >?ZH[A
} vd c k
3)^-A4~E
public static interface Sort { {.GC7dx
public void sort(int[] data); )@DH&
} rDX_$,3L
Z$ {I4a
public static void swap(int[] data, int i, int j) { .cdm@_Ls
int temp = data; OW<i"?0
data = data[j]; k6_RJ8I
data[j] = temp; HeZ! "^w
} }#ZQ\[
} %3M(!X:[