[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; bO-8<IjC_3
} ==$Ox6.
int i1=l; FC(m)S2
int i2=mid+1; RVD=CX
for(int cur=l;cur<=r;cur++){ &4]%&mX)-
if(i1==mid+1) fz:F*zT1
data[cur]=temp[i2++]; P afmHXx
else if(i2>r) 'Y[\[]3[8
data[cur]=temp[i1++]; -2f0CAh~
else if(temp[i1] data[cur]=temp[i1++]; m0 `wmM
else %F03cI,
data[cur]=temp[i2++]; py)V7*CgH
} o'W &gkb9
} @#sQ7eMoy
keX0br7u_
} ~,ac{%8x
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改进后的归并排序: Xc'yz 2B
SMnbI.0
package org.rut.util.algorithm.support; O9!<L.X,%
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import org.rut.util.algorithm.SortUtil; z.7 UfLV9
_c`Gxt%
/** P4s:wuJ^
* @author treeroot 64[j:t=N
* @since 2006-2-2 7pkc*@t
* @version 1.0 n`CmbM@@
*/ D`Fl*Wc4H
public class ImprovedMergeSort implements SortUtil.Sort { u U\UULH0
Q5baY\"9^
private static final int THRESHOLD = 10; ~?nPp$^
%2V_%KA
/* mz>"4-]
* (non-Javadoc) nc([e9_9v
* jo+T!CUM'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T"3WB o
*/ ;5oY)1
public void sort(int[] data) { +>{{91mN
int[] temp=new int[data.length]; D_'Zucq
mergeSort(data,temp,0,data.length-1); az7L0pp
} ^lbOv}C*
F)!B%4
private void mergeSort(int[] data, int[] temp, int l, int r) { Rg+V;C C~
int i, j, k; m/CA
int mid = (l + r) / 2; d[jxU/.p;
if (l == r) 5'.j+{"
return; !k Hpw2
if ((mid - l) >= THRESHOLD) XYf;72*
mergeSort(data, temp, l, mid); ?f:FmgQk
else _^Rf*G!
insertSort(data, l, mid - l + 1); vfmKYiLp
if ((r - mid) > THRESHOLD) E+csK*A7
mergeSort(data, temp, mid + 1, r); . [*6W.X
else ix,5-j
insertSort(data, mid + 1, r - mid); :QB Wy
c!E+&5|n
for (i = l; i <= mid; i++) { KK/~W
temp = data; _epi[zf@
} -SZ^;t
for (j = 1; j <= r - mid; j++) { q^k6.5*"
temp[r - j + 1] = data[j + mid]; ; *r5 d+]
} iw<+rh*C
int a = temp[l]; J$@3,=L6V
int b = temp[r]; -&%#R_RV
for (i = l, j = r, k = l; k <= r; k++) { {'EQ%H$q
if (a < b) { 0t'WM=W<!8
data[k] = temp[i++]; -g_PJ.Hk
a = temp; C {gYrz)
} else { Vtr0=-m&
data[k] = temp[j--]; LBbk]I
b = temp[j]; x_AG=5OJX,
} { +MqXeq
} ,,lrF.
} PudwcP{
/mF%uI>:
/** <LH(>
* @param data !/sXG\
* @param l g/J ^YT!
* @param i Q(>89*b&
*/ XF'K dz>p
private void insertSort(int[] data, int start, int len) { BPwFcT)i!(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6xvyhg#B
} !Zlvz%X
} ney6N@
} Sycs u_je
} _T)dmhG
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堆排序： rt^<=|Z
!ku5P+y$
package org.rut.util.algorithm.support; [r<lAS{ .
CZuV{Oh}?
import org.rut.util.algorithm.SortUtil; L1 O\PEeT
P]bI".A8
/** pk:YjJs
* @author treeroot xOp8[6Ga'
* @since 2006-2-2 rs`H':a/
* @version 1.0 q!t_qX7u
*/ XSkx<"U*
public class HeapSort implements SortUtil.Sort{ P0Z1cN}
[2WJ>2r}6
/* (non-Javadoc) mtOCk 5E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E0o=
*/ |Rf4^vN
public void sort(int[] data) { $&OoxC
MaxHeap h=new MaxHeap(); 7?Q<kB=f
h.init(data); (ylpH`
for(int i=0;i h.remove(); vdyLwBz:
System.arraycopy(h.queue,1,data,0,data.length); dX^OV$
} =I-SQI8
:RBp
private static class MaxHeap{ NffZttN
{|9x*I
void init(int[] data){ q$Gf9&ZO
this.queue=new int[data.length+1]; ]hJ#%1
for(int i=0;i queue[++size]=data; NnRR"'
fixUp(size); )`, Bt
} ou0(C`
} +vY8HQ|v
tg_v\n
private int size=0; R/VrBiw
TyI"fP
private int[] queue; }'U"HHv
w)2X0ev"
public int get() { Yg3Vj=
return queue[1]; 7j8nDX<
} }\!&3^I
_l<e>zj
public void remove() { 8!(4;fN$j.
SortUtil.swap(queue,1,size--); 9TuE.
fixDown(1); G|*^W;(Z
} HN9!~G
file://fixdown S:"R/EE(
private void fixDown(int k) { p(-f$Q(
int j; IxNY%&* `
while ((j = k << 1) <= size) { eo.y,Uh
if (j < size %26amp;%26amp; queue[j] j++; 38ChS.(
if (queue[k]>queue[j]) file://不用交换 %9cu(yc*}
break; 8q58H[/c
SortUtil.swap(queue,j,k); Oc8]A=M12
k = j; r+r-[z D(
} (,z0V+!
} =BzyI
private void fixUp(int k) { G}<%%U D
while (k > 1) { 3GqvL_
int j = k >> 1; e@}zp
if (queue[j]>queue[k]) ~M7 J{hK
break; ?=}~]A5N
SortUtil.swap(queue,j,k); ]A+q:kP
k = j; f?}~$agc
} 5Arx"=c
} \3a(8Em
'mx_]b^O
} )GhMM
nG hFYQl
} " lar~
1#9qP~#]'{
SortUtil： sq1Z;l31"
a"ZBSg(
package org.rut.util.algorithm; -L<''2t
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import org.rut.util.algorithm.support.BubbleSort; XMzL\Edo
import org.rut.util.algorithm.support.HeapSort; >T: Yp<
import org.rut.util.algorithm.support.ImprovedMergeSort; %P05k
import org.rut.util.algorithm.support.ImprovedQuickSort; 6P@3UQ)}s
import org.rut.util.algorithm.support.InsertSort; 8#b>4Dx
import org.rut.util.algorithm.support.MergeSort; 5:ca6H
import org.rut.util.algorithm.support.QuickSort; t 1gH9
import org.rut.util.algorithm.support.SelectionSort; Hry*.s -
import org.rut.util.algorithm.support.ShellSort; j[2?}?
EA_6L\+8&
/** o0t/
* @author treeroot C QO gR GW
* @since 2006-2-2 YbjeM6#E
* @version 1.0 BIyNiol$AJ
*/ s2s}5b3
public class SortUtil { j<[+vrj
public final static int INSERT = 1; 4|i.b?"
public final static int BUBBLE = 2; rN* ,U\q
public final static int SELECTION = 3; H%2Y8}
public final static int SHELL = 4; aM/sD=}
public final static int QUICK = 5; B^`'2$3
public final static int IMPROVED_QUICK = 6; jF4h/((|EU
public final static int MERGE = 7; H]>b<Cs
public final static int IMPROVED_MERGE = 8; z@5t7e)!R
public final static int HEAP = 9; (9R;a np
~{MmUp rS
public static void sort(int[] data) { U6SgV 8
sort(data, IMPROVED_QUICK); l{OU\
} Hp`Mp)1s
private static String[] name={ 9;,_Qq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E5@U~|V[
}; (KQAKEhD!
GjF'03Z4
private static Sort[] impl=new Sort[]{ aDr46TB`J
new InsertSort(), 'U=D6X%V9m
new BubbleSort(), A'(v]w
new SelectionSort(), U-+%e:v
new ShellSort(), Okd?=*sBx
new QuickSort(), n$>E'oG2t
new ImprovedQuickSort(), v"x{oD$R
new MergeSort(), ;533;(d*o
new ImprovedMergeSort(), j(JUOief
new HeapSort() ;yh}$)^9
}; PP{2{
~xz3- a/
public static String toString(int algorithm){ O}VI8OB(&
return name[algorithm-1]; 5G-)>
} )'\pa2
%*4Gx +b
public static void sort(int[] data, int algorithm) { w783e
impl[algorithm-1].sort(data); n- cEa/g
} 49Sq)jd<
_ElA\L4g%
public static interface Sort { mG;Gt=4
public void sort(int[] data); B/@9.a.c
} ^ 'jJ~U
b.Wf*I?
public static void swap(int[] data, int i, int j) { SVvR]T&_
int temp = data; ?9<byEO%M
data = data[j]; [p3)C<;ZC
data[j] = temp; ^"Y5V5
} K&{*sa r
} 40VdT|n$$