[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; C2+{U
} ?(5o@Xq
int i1=l; U6c)"^\
int i2=mid+1; gt =j5
for(int cur=l;cur<=r;cur++){ XGE 2J
if(i1==mid+1) xb4Pt`x)rS
data[cur]=temp[i2++]; ]> nPqL
else if(i2>r) |MTpU@`p5
data[cur]=temp[i1++]; ruZYehu1W
else if(temp[i1] data[cur]=temp[i1++]; uSABh^
else DC?21[60
data[cur]=temp[i2++]; /^++As0pY
} a4A`cUt
} $Cz1C
" Sc5qG
} m0=cMVCA!
rQ`\JE&`
改进后的归并排序: DNm(:%)0
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package org.rut.util.algorithm.support; - *:p.(c
>EBZ$X
import org.rut.util.algorithm.SortUtil; WW//heJe-
[3t0M5x w
/** Dh hG$
* @author treeroot '8s>rH5[V
* @since 2006-2-2 +mJ :PAy4
* @version 1.0 =E&b=
*/ zWy ,Om8P
public class ImprovedMergeSort implements SortUtil.Sort { If~95fy~c
>%9^%p^
private static final int THRESHOLD = 10; J?._/RL8-
qq OxTG]
/* fA"<MslKLK
* (non-Javadoc) -h>Z,-DE6
* r0)JUc}Fyq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8 ne/=N|,
*/ gO+\O
public void sort(int[] data) { ~c9>Nr9|`
int[] temp=new int[data.length]; j(0Ilx|7v
mergeSort(data,temp,0,data.length-1); cwk+#ur
} )D:9R)m
6D/uo$1Y
private void mergeSort(int[] data, int[] temp, int l, int r) { Ee{`Y0
int i, j, k; j'3j}G%\T
int mid = (l + r) / 2; ec`bz "1
if (l == r) ,%A)"doaG
return; MMMqG`Px
if ((mid - l) >= THRESHOLD) 5,S,\O9>X
mergeSort(data, temp, l, mid); r)gCTV(kb
else hdo&\Q2D8
insertSort(data, l, mid - l + 1); uc'p]WhQ
if ((r - mid) > THRESHOLD) Z+NF(d
mergeSort(data, temp, mid + 1, r); #X#8ynt
else W0Ktw6
insertSort(data, mid + 1, r - mid); Y^QKp"
As0 B\
for (i = l; i <= mid; i++) { d'ZS;l
temp = data; 8h@q
} },rav]
for (j = 1; j <= r - mid; j++) { v9u<F6
temp[r - j + 1] = data[j + mid]; ERF,tLa!
} w'A tf
int a = temp[l]; &B}Lo
int b = temp[r]; >L^xlm%7o
for (i = l, j = r, k = l; k <= r; k++) { |z:Q(d06
if (a < b) { @!e~G'j%VD
data[k] = temp[i++]; O]t\B*%}
a = temp; %Ys$@dB
} else { `3J':Vh
data[k] = temp[j--]; #>=8w9]
b = temp[j]; VKy5=2&
} Gu5~DyT`G
} GMz8B-vk
} PkTfJQP8
[cDbaq,T
/** &M[MEO`t8
* @param data )Nbc/nB$
* @param l _mXs4
* @param i %4,xx'`
*/ e8oKn&
private void insertSort(int[] data, int start, int len) { fe|g3>/|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >:2}V]/;
} $0#6"urG
} h}h^L+4
} |k6Ox*
} Axlm<3<wf"
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堆排序： b vRB
A;,Dg=FL/
package org.rut.util.algorithm.support; fYB*6Xb,w
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import org.rut.util.algorithm.SortUtil; z$|;-u|
ZZ("-#?
/** #F!Kxks
* @author treeroot gXt O*Rfqk
* @since 2006-2-2 h$pk<<
* @version 1.0 ys%zlbj[
*/ !4t`Hv?'
public class HeapSort implements SortUtil.Sort{ vG~+r<:
B!}BM}r
/* (non-Javadoc) hk_g2g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oSY7IIf%L
*/ -(9O6)Rs$
public void sort(int[] data) { 7Lg7ei2mN7
MaxHeap h=new MaxHeap(); }Gr&w-v
h.init(data); d`Oe_<
for(int i=0;i h.remove(); xIL#h@dz
System.arraycopy(h.queue,1,data,0,data.length); 0Gsu
} i6Qb[\;
T#@{G,N
private static class MaxHeap{ 4z_n4=
@r<b:?u
void init(int[] data){ =WK04\H
this.queue=new int[data.length+1]; e[{mVhg4E
for(int i=0;i queue[++size]=data; 'w.}2(
fixUp(size); q>-R3HB
} rLzW`
} FaY_0G;y
\0?$wIH?
private int size=0; 3+>OGwfQ
< bFy(+
private int[] queue; 2n)gpLIJ
d)tiO2W
public int get() { HTk\723Rdw
return queue[1]; >3PMnI
} ^"x<)@X
$7NCb7%/L
public void remove() { J\=a gQ
SortUtil.swap(queue,1,size--); Xwq]f:@V
fixDown(1); j;\[pg MR/
} d>|;f
file://fixdown q@l(Qol
private void fixDown(int k) { m[:K"lZ ]2
int j; ]-:6T0JuS
while ((j = k << 1) <= size) { w2OsLi Sv
if (j < size %26amp;%26amp; queue[j] j++; Od{jt7<j#
if (queue[k]>queue[j]) file://不用交换 {<K=*rrZ
break; 9x?'}
SortUtil.swap(queue,j,k); 8sg|MWSU
k = j; ?:igumeYX
} E'EcP4eL
} oa`#RC8N
private void fixUp(int k) { {DwIjy31T
while (k > 1) { m#\[m<F
int j = k >> 1; ,Dp0fauJ
if (queue[j]>queue[k]) !9]d|8!
break; X>zlb$
SortUtil.swap(queue,j,k); H)>sTST(
k = j; f%XJ;y\,9H
} W~ruN4q.
} 4h8*mMghs
bL`eiol6
} ? ?[g}>
1nI^-aQ3
} LZ<[ll#C
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SortUtil： IQnIaZ
z9DcnAs
package org.rut.util.algorithm; x2W#ROfg
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import org.rut.util.algorithm.support.BubbleSort; PeTA$Yl
import org.rut.util.algorithm.support.HeapSort; e2w&&B-
import org.rut.util.algorithm.support.ImprovedMergeSort; EzpFOqJG
import org.rut.util.algorithm.support.ImprovedQuickSort; 5=L} \ankn
import org.rut.util.algorithm.support.InsertSort; -RMi8{
import org.rut.util.algorithm.support.MergeSort; Ef@,hX
import org.rut.util.algorithm.support.QuickSort; Ck'aHe22'
import org.rut.util.algorithm.support.SelectionSort; cb$-6ZE/
import org.rut.util.algorithm.support.ShellSort; b>11h
fS=hpL6]@
/** O{]9hm(tN
* @author treeroot JOD/Raq.1k
* @since 2006-2-2 Ig \#f
* @version 1.0 E[g*O5
*/ QlEd6^&
public class SortUtil { 38IMxd9v
public final static int INSERT = 1; \/5RL@X}
public final static int BUBBLE = 2; Riry_
public final static int SELECTION = 3; O!&,5Dy
public final static int SHELL = 4; F9flSeN
public final static int QUICK = 5; wtH~-xSB|
public final static int IMPROVED_QUICK = 6; XP3xJm3
public final static int MERGE = 7; {5j66QFoo
public final static int IMPROVED_MERGE = 8; fex,z%}p
public final static int HEAP = 9; -VT+O+9_A
ig+4S[L~n
public static void sort(int[] data) { [[+ pMI
sort(data, IMPROVED_QUICK); FN^FvQ
} ~*.-
private static String[] name={ '@=PGpRF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T!|=El>
}; 09h.1/
_[h8P9YI4
private static Sort[] impl=new Sort[]{ Z(GfK0vU
new InsertSort(), W|5_$p
new BubbleSort(), 1/Zh^foG
new SelectionSort(), ,wAz^cK|
new ShellSort(), _$s> c!t,#
new QuickSort(), IV`%V+ f
new ImprovedQuickSort(), D(]E/k@;~
new MergeSort(), & ,hr8
new ImprovedMergeSort(), YY5!_k
new HeapSort() y~ rXl
}; `T&jPA9eY
z(13~38+
public static String toString(int algorithm){ wvby?MhPY
return name[algorithm-1]; pv,45z0
} O7G"sT1Dv
+-$Ko fnM
public static void sort(int[] data, int algorithm) { =O$M_1lp
impl[algorithm-1].sort(data); "TOa=Tt{,
} kg97S
:iF%cy.
public static interface Sort { gm)@c2?.
public void sort(int[] data); G}nO@
} t18$x"\4k
`3_lI~=eH
public static void swap(int[] data, int i, int j) { CH#k(sy
int temp = data; PBjmGwg7
data = data[j]; s^8u&y)3
data[j] = temp; s Be7"^
} !|Q5Zi;aX7
} >QkP7Kb