[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; CjZ6NAHc
} jr1Se9u D
int i1=l; JS2!)aqc
int i2=mid+1; &ps6s.K
for(int cur=l;cur<=r;cur++){ EG1x
if(i1==mid+1) Ph\F'xROe
data[cur]=temp[i2++]; * D3
else if(i2>r) ^V,@=QL3U
data[cur]=temp[i1++]; Kz^hQd
else if(temp[i1] data[cur]=temp[i1++]; Vx(;|/:
else 9jjL9f_3
data[cur]=temp[i2++]; .Bijc G
} <^'{ G
} ke</x+\F
<M>#qd@c
} k7[)g]u
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改进后的归并排序: OAyE/Q|
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package org.rut.util.algorithm.support; Ua!Odju*w
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import org.rut.util.algorithm.SortUtil; N>T=L0`
,dq`EsHg`M
/** "p2u+ 8?
* @author treeroot ,DQ >&_DK
* @since 2006-2-2 '.xkn{c
* @version 1.0 $q=hcu
*/ s-o~@(r6
public class ImprovedMergeSort implements SortUtil.Sort { )S"o{N3B
J2x$uO{Bn
private static final int THRESHOLD = 10; kfIbgya
6q!7i%fK?
/* 5vl2yN
* (non-Javadoc) /XC;.dLA#
* ,9+nfj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2}1!WIin
*/ uFa-QG^Y{
public void sort(int[] data) { gB'`I(q5.
int[] temp=new int[data.length]; Zj5NWzj X
mergeSort(data,temp,0,data.length-1); yA457'R1
} M|aQ)ivh3
j=p|'`
private void mergeSort(int[] data, int[] temp, int l, int r) { i$2MjFC-
int i, j, k; (p'/p
int mid = (l + r) / 2; i,^>uf
if (l == r) !k ;[^>
return; 1j8/4:
if ((mid - l) >= THRESHOLD) A89Y;_4y
mergeSort(data, temp, l, mid); pPU2ar
else R#rh
insertSort(data, l, mid - l + 1); GWVEIZ
if ((r - mid) > THRESHOLD) 4j2~"K
mergeSort(data, temp, mid + 1, r); $XtV8
else pyGFDB5_P
insertSort(data, mid + 1, r - mid); QLxXp
i@sCMCu6
for (i = l; i <= mid; i++) { Zz{[Al{
temp = data; %!1@aL]pQ
} yKel|vM#
for (j = 1; j <= r - mid; j++) { jLpgWt`8)E
temp[r - j + 1] = data[j + mid]; Vu^Q4Z
} jauc*347
int a = temp[l]; gt(X!iN]
int b = temp[r]; ,=x.aX Spz
for (i = l, j = r, k = l; k <= r; k++) { w;g)Iy6x
if (a < b) { h/fb<jIP1
data[k] = temp[i++]; Uj y6vgU;
a = temp; ~QQEHx\4zZ
} else { {3_Ffsg`
data[k] = temp[j--]; il 8A&`%
b = temp[j]; j X^&4f
} `*.r'k2R
} )4VLm
} }Etd#">
l[ZQ7$kL
/** IDL^0:eg<.
* @param data !ds"88:5^
* @param l [v>Z(
* @param i AOq9v~)z-
*/ Hj-<{#,
private void insertSort(int[] data, int start, int len) { 3tx0y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `t/@ L:
} v{\n^|=])
} H@OrX
} .T N`p*
} `i_L?C7
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堆排序： Z n"TG/:
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package org.rut.util.algorithm.support; P*nT\B
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import org.rut.util.algorithm.SortUtil; 4N0W& Dy
K[3D{=
/** 2rE~V.)%
* @author treeroot #E~WVTOw
* @since 2006-2-2 d"e%tsj
* @version 1.0 i32_ZBZ?y
*/ R)DNFc:
public class HeapSort implements SortUtil.Sort{ /d]V{I~6
GhfUCW%
/* (non-Javadoc) xs83S.fHg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2 |kH%
*/ &>wce5uV
public void sort(int[] data) { OKLggim{
MaxHeap h=new MaxHeap(); J=Y( *D7Q
h.init(data); qyG636i
for(int i=0;i h.remove(); Gh>fp
System.arraycopy(h.queue,1,data,0,data.length); yADN_
} TG%hy"k
Lb3K};SIV
private static class MaxHeap{ \i;~~;D
po](6V
void init(int[] data){ R4rm>zisVX
this.queue=new int[data.length+1]; %JA&O
for(int i=0;i queue[++size]=data; N@du.d:
fixUp(size); ff5 Lwf{{
} 5}l#zj
} nAba =iW
{-7yZ]OO$
private int size=0; E(4lu%
:Kc0ak)<n
private int[] queue; meVVRFQ2+
!O-_Dp\#
public int get() { BQJ`vIa
return queue[1]; _*?"[TYfX
} #* /W!UOu
I3rnCd(
public void remove() { He_(JXTP
SortUtil.swap(queue,1,size--); ?e|:6a+[f
fixDown(1); j'Q-*-3
} JLV}Fw
file://fixdown 1S.e5{
private void fixDown(int k) { X.4ZLwX=
int j; eYSGxcx
while ((j = k << 1) <= size) { $^D(%
if (j < size %26amp;%26amp; queue[j] j++; m ?"%&|
if (queue[k]>queue[j]) file://不用交换 D>#v 6XI
break; 41Q
SortUtil.swap(queue,j,k); Y l3[~S
k = j; |ukdn2Q
} sluZ-,zE
} ~JRuMP
private void fixUp(int k) { GTIfrqT
while (k > 1) { IEr`6|X
int j = k >> 1; ].T;x|
if (queue[j]>queue[k]) 64?$TT
break; =28H^rK{
SortUtil.swap(queue,j,k); }(%}"%$
k = j; gx9sBkoq5D
} oYm{I ~"
} e4H0<h }{
>W]"a3E
} vc{]c }
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} U)=Z&($T
| xI_aYv*
SortUtil： WHavz0knf[
Y'%Iat(z
package org.rut.util.algorithm; T:~W.3
LmdV@gR
import org.rut.util.algorithm.support.BubbleSort; _$_CR\$
import org.rut.util.algorithm.support.HeapSort; *_rGBW
import org.rut.util.algorithm.support.ImprovedMergeSort; R.'Gg
import org.rut.util.algorithm.support.ImprovedQuickSort; x[@3;_'K
import org.rut.util.algorithm.support.InsertSort; [>9"RzEl
import org.rut.util.algorithm.support.MergeSort; ]Tw6Fg1o>
import org.rut.util.algorithm.support.QuickSort; b/}0 &VXo
import org.rut.util.algorithm.support.SelectionSort; ea}KxLC`,
import org.rut.util.algorithm.support.ShellSort; 7Bd_/A($
a}7KpKCD
/** 6}lEeMRW
* @author treeroot ^52R`{
* @since 2006-2-2 P2RL\`<"
* @version 1.0 oOSyOD
*/ *G|]5
public class SortUtil { kV9NFo22
public final static int INSERT = 1; < io8 b|A
public final static int BUBBLE = 2; %D0Ws9:|
public final static int SELECTION = 3; "A`'~]/hE
public final static int SHELL = 4; PH&ms
public final static int QUICK = 5; 4\WkXwoqQO
public final static int IMPROVED_QUICK = 6; b:I5poI3
public final static int MERGE = 7; 1vudT&
public final static int IMPROVED_MERGE = 8; o*1`,n
public final static int HEAP = 9; ;|,Y2?
4c@F.I
public static void sort(int[] data) { ${eh52)`
sort(data, IMPROVED_QUICK); /UyE- "S
} ,.F+x}
private static String[] name={ $oj<yH<i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L<]PK4
}; Z}StA0F_
,R6$SrNcd
private static Sort[] impl=new Sort[]{ y^BM*CI
new InsertSort(), t4f\0`jN
new BubbleSort(), gcF><i6
new SelectionSort(), w2AWdO6
new ShellSort(), swbD q
new QuickSort(), kO"aE~
new ImprovedQuickSort(), 7^X_tQf
new MergeSort(), Rx2|VD
new ImprovedMergeSort(), " N4]e/.V
new HeapSort() SJ@_eir\o
}; /omVMu
e|y~q0Q$
public static String toString(int algorithm){ #oY7v,x\
return name[algorithm-1]; 1Xc%%j
} JpiKZG@L
3W0:0I
public static void sort(int[] data, int algorithm) { =Ybu_>
impl[algorithm-1].sort(data); 3|3lUU\I
} m!(K
<{uIB;P
public static interface Sort { mj~CCokF{?
public void sort(int[] data); !I&Sy]G
} z0Hh8*
P*]g*&*Y +
public static void swap(int[] data, int i, int j) { p(%x&*)f
int temp = data; K)OlCpHc
data = data[j]; na)ceN2h
data[j] = temp; dI|/Xm>
} K2Zy6lGOZ
} V"73^