[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; Qt~B#R. V
} ckWkZ 78\
int i1=l; I^:F)a:
int i2=mid+1; bRsc-Fz6
for(int cur=l;cur<=r;cur++){ ;W~4L+e
if(i1==mid+1) }^9paU
data[cur]=temp[i2++]; 6klD22b2$
else if(i2>r) HzEGq,.
data[cur]=temp[i1++]; y]^#$dK(z
else if(temp[i1] data[cur]=temp[i1++]; F|*tNJU>
else p&O8qAaO
data[cur]=temp[i2++]; AIv<f9*.:
} ~j]dct7
} rKT)!o'
> Y]_K
} \HD-vINV;
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改进后的归并排序: gmDR{loX
+4HlRGH
package org.rut.util.algorithm.support; 5us^B8Q
dQK`sLChv
import org.rut.util.algorithm.SortUtil; O{u[+g
T]uKH29.%
/** +`Fb_m)f
* @author treeroot P9s_2KOF
* @since 2006-2-2 'e85s%ru
* @version 1.0 8$m1eQ`{
*/ BjvdnbJg
public class ImprovedMergeSort implements SortUtil.Sort { rei5{PC
\OA L Or
private static final int THRESHOLD = 10; Ih3$
FR["e1<0
/* dE GX3 -
* (non-Javadoc) Vmtzig3w[
* 506V0]`/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZMJ3NN]F
*/ ydup)[n
public void sort(int[] data) { J?,?fqb
int[] temp=new int[data.length]; 2+Zti8
mergeSort(data,temp,0,data.length-1); ]LVnt-q
} Z)5klg$c
L20rv:W$h
private void mergeSort(int[] data, int[] temp, int l, int r) { -$9~xX
int i, j, k; yfC2^#9 Zu
int mid = (l + r) / 2; rmQ\RP W
if (l == r) F+3!uWUK
return; nzWQQra|?
if ((mid - l) >= THRESHOLD) NnP.k7m)
mergeSort(data, temp, l, mid); \imp7}N
else phmVkV2a;#
insertSort(data, l, mid - l + 1); )vQNiik#
if ((r - mid) > THRESHOLD) aP_3C_
mergeSort(data, temp, mid + 1, r); &#-[Y:?lA
else v4C3uNW
insertSort(data, mid + 1, r - mid); ee^4KKsh\
jr:drzr{I
for (i = l; i <= mid; i++) { |eF.ZC)QWh
temp = data; F:_FjxU
} PU"S;4m
for (j = 1; j <= r - mid; j++) { K.%z;(U
temp[r - j + 1] = data[j + mid]; 0Gx*'B=
} (rIXbekgB
int a = temp[l]; ,# eO&
int b = temp[r]; Lrlk*
for (i = l, j = r, k = l; k <= r; k++) { s.KOBNCFa
if (a < b) { /k) NP
data[k] = temp[i++]; d=F)y~&'
a = temp; L\YZT| K(
} else { %UBPoq
data[k] = temp[j--]; O"8P#Ed
b = temp[j]; ;AltNGcM
} ~ur)fAuF2
} O/$ v69:
} 9\:w8M X'
?;fv!'?%
/** GBW 7Y
* @param data ^(J-dK
* @param l qhnapZJ
* @param i .01TTK*
*/ y+= \z*9
private void insertSort(int[] data, int start, int len) { ZRO.bMgZF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )Yrr%f`\
} ..aK sSm(
} tpE3|5dZF
} =uS8>.Qj
} TtZrttCE6
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堆排序： ^>eFm8`N
Nl=+.d6Qo
package org.rut.util.algorithm.support; +yvBSpY
yG4MUf6
import org.rut.util.algorithm.SortUtil; F; 0Dp
#|q;t
/** X!m;uJZp
* @author treeroot oR77`
* @since 2006-2-2 u$\Tg3du2
* @version 1.0 ~O8]3+U
*/ >H8^0n)?
public class HeapSort implements SortUtil.Sort{ |]I#CdO
,d5ia4\K
/* (non-Javadoc) nMeSCX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I ;l`VtD
*/ fq{I$syY
public void sort(int[] data) { 2AmR(vVa"
MaxHeap h=new MaxHeap(); (Y&R0jt
h.init(data); =w t-YM
for(int i=0;i h.remove(); 8`6 LMQ
System.arraycopy(h.queue,1,data,0,data.length); xR _DY'z
} RR8U Cv
=\*S'Ded
private static class MaxHeap{ *SWv*sD
H_v/}DEG
void init(int[] data){ gr[D!D>
this.queue=new int[data.length+1]; i;gw=Be
for(int i=0;i queue[++size]=data; -g~iE]x6Y
fixUp(size); YK7gd|LR]
} ?! !;XW
} x>'?IJZ
/\Jc:v#Q
private int size=0; #xDDh`
+38Lojb}
private int[] queue; Sv~PXi^`H
'w:tq
public int get() { hl=oiUf[s
return queue[1]; DM+sjn
} Tm0?[[3hC
[sjrb?Xd
public void remove() { oVAOGHE
SortUtil.swap(queue,1,size--); A7mMgb_
fixDown(1); !Mm+bWn=mB
} 4c~*hMry
file://fixdown 1V#B]x:
private void fixDown(int k) { rAtai}Lx
int j; w}fqs/)w
while ((j = k << 1) <= size) { "~B~{ _<j
if (j < size %26amp;%26amp; queue[j] j++; ^Jc$BMaVg
if (queue[k]>queue[j]) file://不用交换 &?&'"c{;m
break; HrM)jC<~
SortUtil.swap(queue,j,k); AN50P!FZW
k = j; zgZi
} PpI+@:p[
} YN$ndqOP
private void fixUp(int k) { Ov F8&*A
while (k > 1) { EG8%~k+R
int j = k >> 1; Fa Qu$q
if (queue[j]>queue[k]) ytuWT,u
break; iG?w;
SortUtil.swap(queue,j,k); "'Q$.sR
k = j; })h'""i&xn
} `<. 7?
} `\4RFr$
btJ,dpir
} |s)VjS4@
R;5QD`
} wR`w@5,d
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SortUtil： U0lqGEZ
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package org.rut.util.algorithm; My`josJ`Pb
$fq-wl-=
import org.rut.util.algorithm.support.BubbleSort; n3-GnVC][
import org.rut.util.algorithm.support.HeapSort; 4+Li)A:4.
import org.rut.util.algorithm.support.ImprovedMergeSort; p7?CeyZ-V
import org.rut.util.algorithm.support.ImprovedQuickSort; T +|J19
import org.rut.util.algorithm.support.InsertSort; >"2\D|-/
import org.rut.util.algorithm.support.MergeSort; S}XB |
import org.rut.util.algorithm.support.QuickSort; Off: ~
import org.rut.util.algorithm.support.SelectionSort; E1mI Xd;.
import org.rut.util.algorithm.support.ShellSort; BZnp #}f
VuYWb)@
/** ^H@!)+ =
* @author treeroot 8=!rnJCav
* @since 2006-2-2 81%qM7v9H
* @version 1.0 WHdqO8
*/ +?J_6Mo@X
public class SortUtil { ,4h!"c
public final static int INSERT = 1; 8VBkIYgb
public final static int BUBBLE = 2; v)v{QNQp^
public final static int SELECTION = 3; }kgjLaQ^N
public final static int SHELL = 4; %BT)oH}
public final static int QUICK = 5; QBN=l\m+
public final static int IMPROVED_QUICK = 6; $A5B{2
public final static int MERGE = 7; soFvrl^Ql+
public final static int IMPROVED_MERGE = 8; @eAGN|C5
public final static int HEAP = 9; Q}k_#w
~]m@k'n
public static void sort(int[] data) { dd @COP?
sort(data, IMPROVED_QUICK); +w_MSj#P
} J"a2 @S&
private static String[] name={ 8H$@Xts
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kOlI?wc
}; P5ESrZ@f
VygXhh^7\
private static Sort[] impl=new Sort[]{ [|m>vY!
new InsertSort(), &})4?5
new BubbleSort(), .yHHogbt
new SelectionSort(), ID{Pzmt-
new ShellSort(), l72ie
new QuickSort(), hCOy\[2$
new ImprovedQuickSort(), ]ZU:%Qhu
new MergeSort(), qAuUe=w%p
new ImprovedMergeSort(), s\3Z?zm8
new HeapSort() 7kWZMi
}; 2=Vkjh-
o#KPrW`XJ/
public static String toString(int algorithm){ 8m13M5r
return name[algorithm-1]; l yLK$B?/
} s K$Sar
}X W#?l
public static void sort(int[] data, int algorithm) { @zVBn~=i
impl[algorithm-1].sort(data); +2_6C;_DX
} k*UR#z(I
:BrnRW64
public static interface Sort { ^QHMN 7r/
public void sort(int[] data); )oz-<zW
} W0r5D9k
n<"a+TTU
public static void swap(int[] data, int i, int j) { !A ydhe
int temp = data; 'piF_5(@
data = data[j]; B2Awdw3=g
data[j] = temp; S|u1QGB
} KzFs#rhpn
} zxynEdO