[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; n 3]y$wK
} ?(=B=a[
int i1=l; $g^;*>yr
int i2=mid+1; )5v .9N6v
for(int cur=l;cur<=r;cur++){ cA\W|A)
if(i1==mid+1) <am7t[G."
data[cur]=temp[i2++]; KAzRFX),
else if(i2>r) f$'D2o, O
data[cur]=temp[i1++]; Y|~>(
else if(temp[i1] data[cur]=temp[i1++]; TK>}$.c%+
else zK92:+^C
data[cur]=temp[i2++]; BkeP?X
} F"CYrt
} el%Qxak`"
sJlKN
} BYf"l8^,
7EXmmB~>,
改进后的归并排序: !;a<E:
i5"q1dRQ
package org.rut.util.algorithm.support; iD`XD\.?
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import org.rut.util.algorithm.SortUtil; |{K:.x#^
8(;i~f:bCW
/** 9 JtG&^*
* @author treeroot OXB-.<
* @since 2006-2-2 "lZ<bG
* @version 1.0 jFv<]D%A[
*/ Uy:.m
public class ImprovedMergeSort implements SortUtil.Sort { }+J@;:
g <o;\\
private static final int THRESHOLD = 10; VLN3x.BY
co80M;4
/* :\OvVS/
* (non-Javadoc) M[{:o/]<
* 1aG}-:$t'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZM?r1Z4
*/ ]l'ki8
public void sort(int[] data) { {@%(0d{n}
int[] temp=new int[data.length]; -`UlntEdZ:
mergeSort(data,temp,0,data.length-1); s`YuH <8
} >xKRU5
Y ckbc6F
private void mergeSort(int[] data, int[] temp, int l, int r) { <k6xScy$}
int i, j, k; POXn6R!mM1
int mid = (l + r) / 2; MvmP["%J4_
if (l == r) ~B@o?8D]
return; z-G (!]:
if ((mid - l) >= THRESHOLD) am3E7u/
mergeSort(data, temp, l, mid); r|@?v,
else m5X=P5U
insertSort(data, l, mid - l + 1); Se8y-AL6x>
if ((r - mid) > THRESHOLD) `.g8JC\_m
mergeSort(data, temp, mid + 1, r); y~jIAp
else mNel3J3
insertSort(data, mid + 1, r - mid); L#Y;a 5b
|hM)e*"
for (i = l; i <= mid; i++) { ={'($t%|T
temp = data; UGt7iT<`8
} BaAb4{
for (j = 1; j <= r - mid; j++) { :nUsC+oBS
temp[r - j + 1] = data[j + mid]; bicL%I2h
} Fw m:c[G
int a = temp[l]; I "2FTGA
int b = temp[r]; |plo65
for (i = l, j = r, k = l; k <= r; k++) { *Mc\7D
if (a < b) { :t^})%
data[k] = temp[i++]; R <\Yg3m8
a = temp; 9m4rNvb
} else { s= fKAxH
data[k] = temp[j--]; Dys"|,F
b = temp[j]; 2*YXm>|1
} pNFIO t:(
} L?+|%[
} #>B1$(@
[i1D~rCcn
/** =_J<thp
* @param data j//wh1
* @param l G\ZRNb
* @param i :q<%wLs
*/ m4>oE|\
private void insertSort(int[] data, int start, int len) { h_yR$H&tX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @|Bp'`j%J
} eE%yo3
} )\Q|}JV
} H>iZVE
} nV*sdSt
,z)NKt#
堆排序： ss8v4@C
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package org.rut.util.algorithm.support; 86F+N_>Z
/exl9Ilt]
import org.rut.util.algorithm.SortUtil; M&c1iK\E8
$yFuaqG`Wo
/** KocXSh U
* @author treeroot {WOfT6y+
* @since 2006-2-2 G5J ZB7C
* @version 1.0 [F[<2{FQF
*/ }zxh:"#K
public class HeapSort implements SortUtil.Sort{ 5)NBM7h
wLe&y4
/* (non-Javadoc) L6=RD<~C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <# r.}T.l
*/ 7h/Q;P5
public void sort(int[] data) { 0]W]#X4A
MaxHeap h=new MaxHeap(); `f+g A
h.init(data); +/86w59
for(int i=0;i h.remove(); 1|w:xG^
System.arraycopy(h.queue,1,data,0,data.length); ?Hxgx
} q.[[c
rOr1H!
private static class MaxHeap{ [W=S8>
6_K#,_oZ
void init(int[] data){ aEdJri
this.queue=new int[data.length+1]; b\m(0/x
for(int i=0;i queue[++size]=data; kdPm # $-
fixUp(size); w!w _`7[
} n12c075
} P\6T4s
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private int size=0; .x?zky^
#n)W
private int[] queue; "d>g)rvOc
]m#MwN$
public int get() { A""*vqA
return queue[1]; <?7,`P:h[
} ||ZufFO
V^/^OR4k
public void remove() { *Q120R
SortUtil.swap(queue,1,size--); -U;LiO;N
fixDown(1); FK >8kC
} '!h0![OH
file://fixdown h]DECd{
private void fixDown(int k) { MGyB8(
int j; KXA)i5z
while ((j = k << 1) <= size) { l@/kPEh
if (j < size %26amp;%26amp; queue[j] j++; aC Lg~g4
if (queue[k]>queue[j]) file://不用交换 y{I[}$k
break; 8 E+C:"
SortUtil.swap(queue,j,k); 8Pr7aT:,
k = j; #L= eK8^e
} fy>And*
} iA{jKk=
private void fixUp(int k) { r5da/*G/O
while (k > 1) { z/&a\`DsU
int j = k >> 1; v[DbhIXU
if (queue[j]>queue[k]) *[~o~e/YCb
break; qq7X",s
SortUtil.swap(queue,j,k); nC.2./OwMf
k = j; !v4j`A;%
} bKJ7vXC05
} yO,`"Dc_0
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} zpr@!76
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} n.XhK_6n]M
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SortUtil： A1t~&?
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package org.rut.util.algorithm; >g"M.gW
[gns8F#H\
import org.rut.util.algorithm.support.BubbleSort; 3?Eoj95w!
import org.rut.util.algorithm.support.HeapSort; $gl<{{
import org.rut.util.algorithm.support.ImprovedMergeSort; $#ju?B~
import org.rut.util.algorithm.support.ImprovedQuickSort; QUZQY`'@
import org.rut.util.algorithm.support.InsertSort; N|O]z
import org.rut.util.algorithm.support.MergeSort; ZIL| .<8I
import org.rut.util.algorithm.support.QuickSort; n$|c{2]=
import org.rut.util.algorithm.support.SelectionSort; zvb}p
import org.rut.util.algorithm.support.ShellSort; 9C)3 b3
!+DJhw&c,
/** i|]Va44
* @author treeroot =Pb5b6Y@6
* @since 2006-2-2 (p.3'j(
* @version 1.0 -0VA!3l
*/ Li-(p"
public class SortUtil { oBNX8%5w
public final static int INSERT = 1; T'b/]&0Tio
public final static int BUBBLE = 2; 11y.z^
public final static int SELECTION = 3; 5+/b$mHZX
public final static int SHELL = 4; T<e7(=
public final static int QUICK = 5; d:<H?~
public final static int IMPROVED_QUICK = 6; MjXE|3&
public final static int MERGE = 7; hN_f h J
public final static int IMPROVED_MERGE = 8; hKZ`DB4
public final static int HEAP = 9; ,WB_C\.#XN
Z-h7
public static void sort(int[] data) { +5t bK
sort(data, IMPROVED_QUICK); 7Cd_zZ
} X:``{!~geo
private static String[] name={ uQu/(5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >g>`!Sf
}; =GKS;d#/
MYw8wwX0kJ
private static Sort[] impl=new Sort[]{ \9(- /rE
new InsertSort(), 4o4 =
new BubbleSort(), 4`U0">gY
new SelectionSort(), 24jtJC,7
new ShellSort(), rx6-~0!eI=
new QuickSort(), A6NxM8ybn+
new ImprovedQuickSort(), Z2rzb{oS}
new MergeSort(), << ;HY}s
new ImprovedMergeSort(), 7{An@hNh
new HeapSort() LZc$:<J<6
}; lTr*'fX
a\{1UD
public static String toString(int algorithm){ ]KXMGH_
return name[algorithm-1]; 8L-4}!~C
} "<w2v'6S
M.)}e7
public static void sort(int[] data, int algorithm) { ~3bZ+*H>
impl[algorithm-1].sort(data); h^A3 0f_x
} pFJQ7Jlx
! FR%QGn1
public static interface Sort { 6mu<&m@
public void sort(int[] data); Ob8B
} sCF40AoY&
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public static void swap(int[] data, int i, int j) { {+"g':><
int temp = data; Ki/'Ic1
data = data[j]; 2sqm7th
data[j] = temp; bbNU\r5%
} ]dHB}
} &v$,pg%-: