[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; 7.Df2_)
} .YYfba#{
int i1=l; Kx,#Wg{H
int i2=mid+1; !Au'WJfE
for(int cur=l;cur<=r;cur++){ [?z`XY_-
if(i1==mid+1) 6U|An*
data[cur]=temp[i2++]; T%|{Qo<j
else if(i2>r) .!|\Y!]^r
data[cur]=temp[i1++]; XS+2OutVo
else if(temp[i1] data[cur]=temp[i1++]; E Dh$UB)
else y&;ytNG&<
data[cur]=temp[i2++]; _Q)rI%A2
} SB"Uu2)wZ
} Zi'}qs$v
LbCcOkL/@@
} `5da
<r 2$k"*:
改进后的归并排序: ?wM{NVt#-
Fo\* Cr9D
package org.rut.util.algorithm.support; ejs_ ?
G)~/$EF,_
import org.rut.util.algorithm.SortUtil; a`/\0~
>Pa&f20Hp
/** h=:Ls]ZU
* @author treeroot FfEP@$
* @since 2006-2-2 CshYUr -
* @version 1.0 b]A9$-
*/ WBc,/lgZ
public class ImprovedMergeSort implements SortUtil.Sort { ux>wa+XFa
cV8Bl="gqe
private static final int THRESHOLD = 10; O^/z7,
p1}umDb%
/* rjk{9u1a"
* (non-Javadoc) u*n%cXY;J/
* ;5S'?fj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $W}YXLFj?
*/ BF)!VnJ
public void sort(int[] data) { VY9o}J>,w
int[] temp=new int[data.length]; #Y|t,x;
mergeSort(data,temp,0,data.length-1); Z'hHXSXM
} !q]@/<=
4v[Zhf4JM
private void mergeSort(int[] data, int[] temp, int l, int r) { 2iX57-6Ub
int i, j, k; M/?*?B
int mid = (l + r) / 2; |azdFf6A:[
if (l == r) C?OqS+
return; r@WfZZ
if ((mid - l) >= THRESHOLD) ]*/%5ZOI&
mergeSort(data, temp, l, mid); sKu/VAh x
else +g.lLb*#
insertSort(data, l, mid - l + 1); *I)F5M
if ((r - mid) > THRESHOLD) eHX;*~e6)
mergeSort(data, temp, mid + 1, r); <rQ+ErDA
else opaRk.p
insertSort(data, mid + 1, r - mid); 7&O0
YB`1S
for (i = l; i <= mid; i++) { ]7|Zs]6
temp = data; cmcR@zv
} I 0vJJP#
for (j = 1; j <= r - mid; j++) { 8cKP_Ec
temp[r - j + 1] = data[j + mid]; C3k[ipCN
} Q}zd!*
int a = temp[l]; 1@}s:
int b = temp[r]; *'l|ws
for (i = l, j = r, k = l; k <= r; k++) { f3;.+hJ])
if (a < b) { bz'#YM
data[k] = temp[i++]; zEBUR%9
a = temp; NQ3EjARZt
} else { lEXER^6
data[k] = temp[j--]; Mp-hNO}.Z
b = temp[j]; Q0j4c
} Crg@05Z
} vRI0fDu
} !pJd^|4A]
4QZ|e{t
/** pB;8yz=
* @param data 59k[A~)~
* @param l XbaUmCuh
* @param i *xV
*/ 9YQYg@+R
private void insertSort(int[] data, int start, int len) { x?6 \C-i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); br3r!Vuz/-
} fVvB8[(;~
} bCfw,V{sce
} T8t_+|( G
} 07 E9[U[
d_] sV4[
堆排序： YJm64H,[
!5^&?plC@
package org.rut.util.algorithm.support; qK-\`m
-hU1wX%U
import org.rut.util.algorithm.SortUtil; 1}/37\
nBg tK
/** JIOeDuw+
* @author treeroot E{8-VmY
* @since 2006-2-2 Sv>bU4LHf
* @version 1.0 bdYx81
*/ ~q,Wj!>Ob
public class HeapSort implements SortUtil.Sort{ Rm&4Pku
.~AQxsGH
/* (non-Javadoc) QLLMSa+! \
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ha41Wn'tZ
*/ E'^$~h$
public void sort(int[] data) { 7=`_UqCV
MaxHeap h=new MaxHeap(); Cj5=UUnO
h.init(data); @AfC$T
for(int i=0;i h.remove(); Qz4n%|
System.arraycopy(h.queue,1,data,0,data.length); {oVoN>gp
} Qj3l>O
8{B]_: -:
private static class MaxHeap{ $ISx0l~
_t-e.2a v
void init(int[] data){ N2.(0 G
this.queue=new int[data.length+1]; g^)8a;/c
for(int i=0;i queue[++size]=data; oR@1/lV
fixUp(size); u"5 hlccH
} aB^`3J
} Aa!#=V1d
+Ua.\1"6
private int size=0; j21>\K!p
a0)]W%F
private int[] queue; LB\+*P6QM
;=lQMKx0
public int get() { @!KG;d:l
return queue[1]; UZ-[vD1n
} neBcS[
qBF}-N_
public void remove() { hOM#j
SortUtil.swap(queue,1,size--); VK[`e[.C
fixDown(1); ["BD,mB
} Xf%wW[~
file://fixdown zL=PxFw0
private void fixDown(int k) { ,/Al'
int j; s<'WTgy1i
while ((j = k << 1) <= size) { _)a!g-Do7
if (j < size %26amp;%26amp; queue[j] j++; 8dlhL8#
if (queue[k]>queue[j]) file://不用交换 8T"8C
break; @$R^-_m
SortUtil.swap(queue,j,k); \rSofn#c
k = j; p"|0PlW
} ?F^O7\rw
} $0,lE+7*
private void fixUp(int k) { ~vV+)KI
while (k > 1) { /7&WFCc)(
int j = k >> 1; {1L{
if (queue[j]>queue[k]) u,`cmyZ
break; >p>B-m
SortUtil.swap(queue,j,k); ~yu\vqN
k = j; V7)<MY
} Q7pjF`wu
} d37|o3oC
r68d\N`.
} %mNd9 ]<
XLj|y#h
} PwS7!dzH-
fp2uk3Bm[
SortUtil： WVdF/H
@XN*H- |
package org.rut.util.algorithm; (dHil#l
4Ixu%
import org.rut.util.algorithm.support.BubbleSort; h:Hpz
import org.rut.util.algorithm.support.HeapSort; 4=C7V,a
import org.rut.util.algorithm.support.ImprovedMergeSort; !~-@p?kW/
import org.rut.util.algorithm.support.ImprovedQuickSort; k{E!X
import org.rut.util.algorithm.support.InsertSort; DgGG*OXY
import org.rut.util.algorithm.support.MergeSort; EeDK ^W8N
import org.rut.util.algorithm.support.QuickSort; gT#hF]c:
import org.rut.util.algorithm.support.SelectionSort; _Eus7
import org.rut.util.algorithm.support.ShellSort; xi}3)5
NU(YllPB
/** d_)VeuE2
* @author treeroot =@s{H +
* @since 2006-2-2 DpvMY94Qh
* @version 1.0 %3es+A@
*/ fa2hQJ02
public class SortUtil { f<LRM
public final static int INSERT = 1; aB2t/ua
public final static int BUBBLE = 2; !"bU|a
public final static int SELECTION = 3; -^WW7 g`
public final static int SHELL = 4; W3y9>]{x^
public final static int QUICK = 5; [_1K1i"m
public final static int IMPROVED_QUICK = 6; li
public final static int MERGE = 7; fT0+inRG
public final static int IMPROVED_MERGE = 8; cjc1iciZ
public final static int HEAP = 9; >{.|Ng4K
mu@IcIb>
public static void sort(int[] data) { AR6hfdDDT
sort(data, IMPROVED_QUICK); J9q[u[QZ9O
} n7iIY4gZ
private static String[] name={ VY j pl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ct9dV7SH
}; 18AlQ+')?w
,`U'q|b
private static Sort[] impl=new Sort[]{ s/0~!0
new InsertSort(), &e;GoJ
new BubbleSort(), 3u&)6C?YM
new SelectionSort(), UsnIx54D3
new ShellSort(), de,4Ms!%
new QuickSort(), fea4Ul{ib
new ImprovedQuickSort(), A*TO0L
new MergeSort(), :nn(Ndlz9
new ImprovedMergeSort(), DNGj81'c
new HeapSort() x?n13C
}; KpfQ=~'
+.IncY8C$
public static String toString(int algorithm){ @9\L|O'~?
return name[algorithm-1]; #s0Wx47~
} cOb,Md
6'ia^om
public static void sort(int[] data, int algorithm) { Ae^Idz
impl[algorithm-1].sort(data); P"<,@Mn
} Ag_I'
(T1d!v"~"
public static interface Sort { 57`9{.HB
public void sort(int[] data); ]udH`{]
} YV)h"u+@0
(i>bGmiN
public static void swap(int[] data, int i, int j) { lj"72
int temp = data; D:fLQ8a
data = data[j]; v<V9Z <ub
data[j] = temp; C$7dmGjZ
} (x/xqDpmBS
} 5v5K}hx