[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; R!y`p:O C
} ka?EXF:
int i1=l; KbM1b
int i2=mid+1; u.9syr
for(int cur=l;cur<=r;cur++){ "*JyNwf
if(i1==mid+1) i=AQ1X\s
data[cur]=temp[i2++]; a*bAf'=
else if(i2>r) Su*f`~G];
data[cur]=temp[i1++]; 3\E G
else if(temp[i1] data[cur]=temp[i1++]; '8V>:dy>
else -W'T3_
data[cur]=temp[i2++]; cZl/8?dj}
} linvK.Lf
} } 3JOC!;;
bW?cb5C
} &E0L 2gbI
Q1^kU0M}
改进后的归并排序: v)s; wD
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package org.rut.util.algorithm.support; cTu"Tu\Qw
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import org.rut.util.algorithm.SortUtil; 2e|m3
X3Yi|dyn T
/** 'wd&O03&
* @author treeroot ~Hb2-V
* @since 2006-2-2 t*(buAx
* @version 1.0 aM!%EaT
*/ "U o~fJ
public class ImprovedMergeSort implements SortUtil.Sort { BVe c
Pt\GVWi_t
private static final int THRESHOLD = 10; HMl M!Xk?
H}PZJf_E
/* lqZUU92;
* (non-Javadoc) FfpP<(4
* TaNcnAY>9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Z1y1%a
*/ 9*;OHoDh
public void sort(int[] data) { <Oihwr@5<
int[] temp=new int[data.length]; I'e`?H t
mergeSort(data,temp,0,data.length-1); %shCqS
} 4o,G[Cf_
v/[*Pze,C
private void mergeSort(int[] data, int[] temp, int l, int r) { &\L\n}i-
int i, j, k; Bh5z4
int mid = (l + r) / 2; 2f0qfF
if (l == r) HJ0Rcw%
return; (Q F-=o
if ((mid - l) >= THRESHOLD) A#Ne07d
mergeSort(data, temp, l, mid); ?4H>1Wkb
else JN>h:
insertSort(data, l, mid - l + 1); S:{`eDk\A_
if ((r - mid) > THRESHOLD) kj/v$m
mergeSort(data, temp, mid + 1, r); >bbvQb+j
else P&5kO;ia
insertSort(data, mid + 1, r - mid); Yx':~
nNpXkI:
for (i = l; i <= mid; i++) { 82KWe=
temp = data; /4{IxQk
} vu|-}v?:
for (j = 1; j <= r - mid; j++) { -h%1rw
temp[r - j + 1] = data[j + mid]; 4gh` >
} l9vJ]
int a = temp[l]; V(P 1{g
int b = temp[r]; ?F/)<r
for (i = l, j = r, k = l; k <= r; k++) { X1FKcWv
if (a < b) { sj8lvIY5
data[k] = temp[i++]; dLtmG:II
a = temp; M@<r8M]G
} else { a,eJO??
data[k] = temp[j--]; NN]8T
b = temp[j]; O6$n VpD3
} G0b##-.'^
} ,iMdv+
} p@[n(?duC.
+Y"HbNz
/** K8 Hj)$E61
* @param data #8r1<`']!
* @param l )(-aw,iK
* @param i 1a_;(T
*/ S0H|:J
private void insertSort(int[] data, int start, int len) { 4GG0jCNk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8/zv3.+[
} Uc( z|
} sOhKMz
} Y{g[LG`U
} J!d=aGY0-
.tA=5QY,
堆排序： NKMVp/66D
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package org.rut.util.algorithm.support; f[Xsri
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import org.rut.util.algorithm.SortUtil; x<1t/o
N ,nvAM
/** 6[\1Nzy>
* @author treeroot \JDxN
* @since 2006-2-2 L3Ivm:
* @version 1.0 vY);7
*/ pMV?vH
public class HeapSort implements SortUtil.Sort{ *X8Pa;x
EL(BXJrx{
/* (non-Javadoc) !112u#V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I|. <
*/ Xh@;4n
public void sort(int[] data) { IubzHf
MaxHeap h=new MaxHeap(); z LZHVvL3
h.init(data); ?$.x%G+
for(int i=0;i h.remove(); g4&f2D5
System.arraycopy(h.queue,1,data,0,data.length); FXh*!%"*
} SS!b`
<['ucp
private static class MaxHeap{ ?\_vqW
lY[\eQ 1:
void init(int[] data){ Qb8Z+7
this.queue=new int[data.length+1]; o]@'R<F(u
for(int i=0;i queue[++size]=data; ?G 'sb}.
fixUp(size); K&BaGrR
} R{UZCFZ
} 5V8`-yO9
cp2a @
private int size=0; *0x!C8*`Xe
=55V<VI
private int[] queue; 2hY"bpGW
k_`YVsEYP
public int get() { qAi:F=> X
return queue[1]; 4"#F=f0
} z?WkHQ9
\|6Q]3l
public void remove() { %J+k.UrM
SortUtil.swap(queue,1,size--); 8^!ib/@v"
fixDown(1); 1pP q)}=+
} !*PX-
file://fixdown emIF{oP
private void fixDown(int k) { ubQr[/
int j; EOXuc9>G
while ((j = k << 1) <= size) { @./@"mR<
if (j < size %26amp;%26amp; queue[j] j++; *0Wkz'=U
if (queue[k]>queue[j]) file://不用交换 J3hhh(
break; V$bq|r
SortUtil.swap(queue,j,k); u3\_![Jt?
k = j; ?f:ND1jU
} CEJqo8ds
} >=/DCQ$
private void fixUp(int k) { 0Ok[`r`
while (k > 1) { 2]V8-
int j = k >> 1; 3:bP>l!
if (queue[j]>queue[k]) m@"p#pt(_
break; Kh{_BdN
SortUtil.swap(queue,j,k); r=#v@]zB
k = j; `$ pJ2S
} kW&zkE{
} r{wf;5d(
HG^~7oMf
} JPpNCC.b
Rp !Rzl<
} lL&p?MUp
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SortUtil： WS"v"J%
c=<^pCa9t1
package org.rut.util.algorithm; \6!s";=hQ
Ict+|<f
import org.rut.util.algorithm.support.BubbleSort; `HILsU=|
import org.rut.util.algorithm.support.HeapSort; oI"gQFGu`u
import org.rut.util.algorithm.support.ImprovedMergeSort; GQ}Rxu]
import org.rut.util.algorithm.support.ImprovedQuickSort; j]m|}n
import org.rut.util.algorithm.support.InsertSort; XsX];I{E,
import org.rut.util.algorithm.support.MergeSort; 'y7<!uo?
import org.rut.util.algorithm.support.QuickSort; ^_/gM[H.
import org.rut.util.algorithm.support.SelectionSort; 0aGAF ]
import org.rut.util.algorithm.support.ShellSort; eBqF@'DQ
3935cxT1U
/** aT8A+=K6
* @author treeroot R)Dh;XA
* @since 2006-2-2 T#a6X;9P
* @version 1.0 S"/gZfxer
*/ :Yn{:%p
public class SortUtil { \wV ?QH
public final static int INSERT = 1; G{0f* cH)
public final static int BUBBLE = 2; !J(6E:,b#
public final static int SELECTION = 3; a>S-50
public final static int SHELL = 4; +f,I$&d.V
public final static int QUICK = 5; r@ba1*y0
public final static int IMPROVED_QUICK = 6; BJjxy0+
public final static int MERGE = 7; Pt7C/ qM/
public final static int IMPROVED_MERGE = 8; 1~vv<`-
public final static int HEAP = 9; ZVz*1]}
/Q'O]h0a
public static void sort(int[] data) { le2 v"Y
sort(data, IMPROVED_QUICK); -l{ wB"
} h([qq<Lzs
private static String[] name={ \3whM6tK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0gr#<(
}; c[EG cY={
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private static Sort[] impl=new Sort[]{ 'Me(qpsq
new InsertSort(), 8xHjdQr
new BubbleSort(), }R`}Ey|{
new SelectionSort(), '8b=4mrbH
new ShellSort(), _#w5hXcu
new QuickSort(), P7!gUxcv9Y
new ImprovedQuickSort(), \>+BvF
new MergeSort(), Jo9c|\4
new ImprovedMergeSort(), PRK*7-(
new HeapSort() !%QbE[Kl>
}; Tx/KL%X
!={QL:
public static String toString(int algorithm){ ]%UAN_T
return name[algorithm-1]; n yNHjn |W
} jyC>~}?
sVP2$?
public static void sort(int[] data, int algorithm) { CN7qqd
impl[algorithm-1].sort(data); S.^x)5/,,T
} uU1q?|4
BF U#FE)s
public static interface Sort { >2tosxH M
public void sort(int[] data); Rr>""
} _? u} Jy_
`;&=m, W'
public static void swap(int[] data, int i, int j) { =%wBC;
int temp = data; +N!/>w]n
data = data[j]; |sDp>..
data[j] = temp; sJ|IW0Mr
} 7/BA!V(na
} DIh[%