[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; aK7}}
} !%.=35NS@E
int i1=l; i6g=fx6j*
int i2=mid+1; iq,rS"
for(int cur=l;cur<=r;cur++){ e^$JGh2
if(i1==mid+1) 15r=d
data[cur]=temp[i2++]; {w7/M]m-
else if(i2>r) BfD&e`KI
data[cur]=temp[i1++]; \NKQ:F1
else if(temp[i1] data[cur]=temp[i1++]; dcyHp>\)|
else E]=>@EX
data[cur]=temp[i2++]; |"+Ufw^
} `3@?)xa
} C2\zbC[qm
T''<yS
} NB+/S;`
m(0X_&&?z
改进后的归并排序: uL^`uI#I
7!\zo mx
package org.rut.util.algorithm.support; |=MhI5gsx
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import org.rut.util.algorithm.SortUtil; 5L_`Fw\l
v G9>e&Be
/** "\=Phqw
* @author treeroot cLw|[!5:
* @since 2006-2-2 `*D"=5G+
* @version 1.0 ,]]*}4[r
*/ 8_"NF%%(n
public class ImprovedMergeSort implements SortUtil.Sort { (OA4H1DL^
U3Z-1G~*r
private static final int THRESHOLD = 10; kg\8 (@h]
<Y2$'ETD
/* P+wpX
* (non-Javadoc) =|8hG*D8
* -Tn%O|#K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QHc([%oV
*/ O%N.;Ve
public void sort(int[] data) { yxU9W,D v
int[] temp=new int[data.length]; jL'`M%8O
mergeSort(data,temp,0,data.length-1); #<EYO
} SvrUXf
c*\;!dbP
private void mergeSort(int[] data, int[] temp, int l, int r) { bdG@%K',
int i, j, k; +.OdrvN4)
int mid = (l + r) / 2; HrfS^B
if (l == r) 9%1J..c
return; 't5`Ni
if ((mid - l) >= THRESHOLD) m^=El7+
mergeSort(data, temp, l, mid); N/--6)5~0
else T[#q0bv
insertSort(data, l, mid - l + 1); y%spI/(
if ((r - mid) > THRESHOLD) n?;rWq"
mergeSort(data, temp, mid + 1, r); xu%eg]
else 1<5Ug8q
insertSort(data, mid + 1, r - mid); HIx%c5^
~_c1h@
for (i = l; i <= mid; i++) { n.z,-H17
temp = data; '+27_j
} ${eV3LSC
for (j = 1; j <= r - mid; j++) { R=F_U
temp[r - j + 1] = data[j + mid]; 0U H]
} \4^rb?B
int a = temp[l]; (<8}un
int b = temp[r]; c?u*,d) G
for (i = l, j = r, k = l; k <= r; k++) { RS l*u[fB
if (a < b) { M.r7^9P
data[k] = temp[i++]; B?- poB&
a = temp; bLAHVi<.
} else { A.dbb'^
data[k] = temp[j--]; :tI F*pC
b = temp[j]; R&a$w8
} {]Hv*{ ]
} /-G_0A2wF
} 9dBxCdpu
,&qC R sw
/** eZN"t~\rX
* @param data "H<us?r{
* @param l @un+y9m[C
* @param i S2_(lS+R
*/ L+(ng
private void insertSort(int[] data, int start, int len) { zsJermF,O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y[dq"
} )>S,#_e*b
} %W)pZN}
} $(Mz@#%
} F= %A9b_a
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堆排序： `fTM/"
Y)+q[MZ R
package org.rut.util.algorithm.support; +yHz7^6-5
c38XM]Jeq
import org.rut.util.algorithm.SortUtil; 4=MjyH|[Jx
'A3skznX{
/** H(rD*R[
* @author treeroot =I)43ahd
* @since 2006-2-2 ~~ rR< re
* @version 1.0 !hhL",
*/ ~rJG4U
public class HeapSort implements SortUtil.Sort{ |E.BGdS
[nPs
/* (non-Javadoc) 5<R m{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L/V^#$
*/ });Rjg
public void sort(int[] data) { Np/\}J&IF
MaxHeap h=new MaxHeap(); Zo yO[#
h.init(data); VL$ T
for(int i=0;i h.remove(); NX.xEW@
System.arraycopy(h.queue,1,data,0,data.length); OmO#} k<
} G7Sw\wW
,1$F#Eh
private static class MaxHeap{ uMS+,dXy
u0 tlf
void init(int[] data){ ?!6Itkg
this.queue=new int[data.length+1]; @2)nhW/z6
for(int i=0;i queue[++size]=data; %dFJ'[jDL
fixUp(size); Qop,~yK
} E<[ s+iX
} }|Mwv $`
*_o(~5w-K
private int size=0; kzDN(_<1
HdJ g
private int[] queue; v#d\YV{I
%gh#gH
public int get() { N}K [Q=
return queue[1]; ?YLq iAA
} ~<m^
r~j [Qm"CJ
public void remove() { DylO;+
SortUtil.swap(queue,1,size--); C;N6",s!
fixDown(1); =abcLrf2G
} jk03 Hd
file://fixdown bj`\;_oo
private void fixDown(int k) { 2!Dz9m3
int j; E,}{iqAb
while ((j = k << 1) <= size) { 7|DG1p9C
if (j < size %26amp;%26amp; queue[j] j++; v{VF>qEP
if (queue[k]>queue[j]) file://不用交换 j)?M
break; ehr-o7](
SortUtil.swap(queue,j,k); *WQ?r&[_'
k = j; 6FA+qYSV
} pOc2V
} 5mD8$%\8
private void fixUp(int k) { 7"!b5(4=
while (k > 1) { 'bi;Y1:
int j = k >> 1; >+P}S@
if (queue[j]>queue[k]) ?K>)bA&l'
break; 2@<_,'
SortUtil.swap(queue,j,k); 49~d6fH
k = j; H@=oVyn/
} vSH,fS-n
} Q'/sP 5Pj
ERpAV-Zf
} Zj2 si
t]$n~!
} [-])$~WfW
w={q@. g%
SortUtil： o@e/P;E
%N*[{j= ^
package org.rut.util.algorithm; i[!|0U`p
J rx^
import org.rut.util.algorithm.support.BubbleSort; )8@-
import org.rut.util.algorithm.support.HeapSort; j Q5F}
import org.rut.util.algorithm.support.ImprovedMergeSort; mH&7{2r
import org.rut.util.algorithm.support.ImprovedQuickSort; r ;RYGLx
import org.rut.util.algorithm.support.InsertSort; 4,I,f>V
import org.rut.util.algorithm.support.MergeSort; H9/!oI1P?
import org.rut.util.algorithm.support.QuickSort; )S g6B;CJ
import org.rut.util.algorithm.support.SelectionSort; D_DwP$wSo
import org.rut.util.algorithm.support.ShellSort; ub-3/T
&zdS9e-fF
/** ""0Y^M2I
* @author treeroot Rql/@j`JX
* @since 2006-2-2 mgAjD.
* @version 1.0 yYA*5 7^A
*/ V`^*Z}d9
public class SortUtil { ,t9EL 21
public final static int INSERT = 1; @N4_){s*
public final static int BUBBLE = 2; ws'e
public final static int SELECTION = 3; .Vbd-jr'M
public final static int SHELL = 4; n1."Qix0
public final static int QUICK = 5; .SD-6GVD
public final static int IMPROVED_QUICK = 6; .\R9tt}
public final static int MERGE = 7; mWT+15\5r(
public final static int IMPROVED_MERGE = 8; o5o myMN
public final static int HEAP = 9; )@NFV*@I
i1vz{Tc
public static void sort(int[] data) { d4S4 e
sort(data, IMPROVED_QUICK); V*jl
} fEHFlgN3Ap
private static String[] name={ &B{zS K$N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qn*l,Z]US
}; ]<;7ZNG"Y5
Lv%3 jj
private static Sort[] impl=new Sort[]{ 8;@y\0
new InsertSort(), >n"0>[:4
new BubbleSort(), NnLK!Q
new SelectionSort(), [ohLG_9
new ShellSort(), $hhXsu=
new QuickSort(), 0cS$S Mn{
new ImprovedQuickSort(), U>2KjZB
new MergeSort(), 9 C[~*,qx
new ImprovedMergeSort(), Nk7y2[
new HeapSort() NUV">i.(
}; nn7LL+h
Q,KNZxT,q
public static String toString(int algorithm){ hIe.Mv-I)
return name[algorithm-1]; .-Lrrk)R+
} >v+1v
a !VWWUTm?
public static void sort(int[] data, int algorithm) { ip-X r|Bq
impl[algorithm-1].sort(data); |a{;<a
} Nny*C`uDF
;ElCWs->\
public static interface Sort { W=+n|1
public void sort(int[] data); hVzyvpw
} @_ %RQO_X
cMY}Y [2c
public static void swap(int[] data, int i, int j) { <?.eU<+O`S
int temp = data; & kC
data = data[j]; //63|;EEkl
data[j] = temp; g04^M(
} (47?lw &
} 4Zbn8GpC