[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; u& 4i=K'x8
} )GT*HJR(vc
int i1=l; g3V bP
int i2=mid+1; 8-JOfq}s
for(int cur=l;cur<=r;cur++){ ~mSW.jy}=-
if(i1==mid+1) yT$CImP73
data[cur]=temp[i2++]; T<o^f n,H
else if(i2>r) j\I{pW-
data[cur]=temp[i1++]; mB\)Q J.%
else if(temp[i1] data[cur]=temp[i1++]; QD8.C=2R
else -RLY.@'d-M
data[cur]=temp[i2++]; %w$\v"^_Y
} UO1WtQyu,H
} FRBW(vKE
`j#zwgUs
} :D|5E>o(
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改进后的归并排序: wo#,c(
v[7iWBqJ
package org.rut.util.algorithm.support; "=0(a)01p:
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import org.rut.util.algorithm.SortUtil; 24g\xNnt
$a@T:zfe
/** v3*y43
* @author treeroot nE&`~
* @since 2006-2-2 i]cD{hv
* @version 1.0 4Eri]O Ri
*/ ^ gMkQYo(#
public class ImprovedMergeSort implements SortUtil.Sort { I>bO<T`
qsT@aSIo9
private static final int THRESHOLD = 10; /VmtQ{KTt+
~|:U"w\[=
/* ^cz4nW<
* (non-Javadoc) A,'F`au
* 2@Nt6r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z [|:HS&
*/ |#b]e|aP
public void sort(int[] data) { #NyfE|MKBC
int[] temp=new int[data.length]; LJ8 t@ui
mergeSort(data,temp,0,data.length-1); gh?3[q6
} sQ}E4Iq1#S
g7UZtpLTm
private void mergeSort(int[] data, int[] temp, int l, int r) { 4\_~B{kzZ
int i, j, k; MwuRxeRO-
int mid = (l + r) / 2; mfW}^mu
if (l == r) ufF>I
return; L*8U.{NY
if ((mid - l) >= THRESHOLD) [yhK4A
mergeSort(data, temp, l, mid); mEZHrr J
else 3|0wD:Dy
insertSort(data, l, mid - l + 1); `;}w!U
if ((r - mid) > THRESHOLD) d:vuRK4+
mergeSort(data, temp, mid + 1, r); S{Q2KD
else 7WMF8(j5
insertSort(data, mid + 1, r - mid); nb~592u
"- ?uB Mz
for (i = l; i <= mid; i++) { n1Wo<$#
temp = data; v[2N-
} +^cjdH*
for (j = 1; j <= r - mid; j++) { j[RY
temp[r - j + 1] = data[j + mid]; h(/& ;\Cr
} ^$AJV%3wI
int a = temp[l]; KY'x;\0 g
int b = temp[r]; &v/>P1Z G
for (i = l, j = r, k = l; k <= r; k++) { |muZv!,E
if (a < b) { vf@toYc[E
data[k] = temp[i++]; iAr]Ed"9|
a = temp; 3 ,f3^A
} else { xxQgX~'x
data[k] = temp[j--]; 1xD?cA\vu
b = temp[j]; K%g_e*"$
} H[Q3M~_E
} /8? u2 q
} h J H
g7;OZ#\
/** XOoz.GSQ
* @param data \v_R]0m\
* @param l ,Dy9-o
* @param i VvUP;o&/
*/ KIGMWS^^
private void insertSort(int[] data, int start, int len) { 0F%/R^mw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [9;[g~;E%m
} 4J{W8jX
} `uof\D<']
} rNoCmNm
} ]p@q.P
)B9/P>c
堆排序： ^ AJ_
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package org.rut.util.algorithm.support; A D%9;KQ8
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import org.rut.util.algorithm.SortUtil; UZ;FrQ(l{
z^o7&\:
/** tPb<*{eG
* @author treeroot HLX#RQ
* @since 2006-2-2 Sw.Kl 0M
* @version 1.0 mM2DZ^"j(
*/ FM"[:&>
public class HeapSort implements SortUtil.Sort{ 1l s8h
oi7Y?hTj
/* (non-Javadoc) LYke\/ md
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +62}//_?
*/ _/NPXDL
public void sort(int[] data) { c{3P|O&.
MaxHeap h=new MaxHeap(); 9hei8L:
h.init(data); Ov;q]Vn>
for(int i=0;i h.remove(); "9#hk3*GqX
System.arraycopy(h.queue,1,data,0,data.length); J6mUU3F9f
} :0kKw=p1R
2Mu3]2>
private static class MaxHeap{ {^Rr:+
;qs^+
void init(int[] data){ >-j([%
this.queue=new int[data.length+1]; @GWlo\rM6^
for(int i=0;i queue[++size]=data; TPA*z9n+B
fixUp(size); 5Y>fVq{U?;
} b(~#CHg
} u/apnAW@M
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private int size=0; a/n~#5-
(\%J0kR3[
private int[] queue; ~g}blv0q+B
lXRB"z
public int get() { r-_-/O"l
return queue[1]; eB9F35[
} w>4( hGO
y/>Nx7C0=2
public void remove() { n]8*yoge
SortUtil.swap(queue,1,size--); {S`Rr/E|%
fixDown(1); 5`QfysR5
} kyf(V)APPu
file://fixdown LX}|%- iv
private void fixDown(int k) { y*E{X
int j; l%qfaU2
while ((j = k << 1) <= size) { Ckhwd
if (j < size %26amp;%26amp; queue[j] j++; em2Tet
if (queue[k]>queue[j]) file://不用交换 JyePI:B&)j
break; >#y1(\e
SortUtil.swap(queue,j,k); W~5gTiBZ]
k = j; ;?Q0mXr
} f\z9?Z(~
} v}=pxWhm
private void fixUp(int k) { S[CWrPaDQ
while (k > 1) { zVis"g`
int j = k >> 1; _TyQC1 d
if (queue[j]>queue[k]) w+{{4<+cd
break; bYYjP.rcF
SortUtil.swap(queue,j,k); .*?)L3n+t
k = j; ]dT]25V
} }tJMnq/m($
} orFB*{/Z
7 6HB@'xY
} !iAZEOkRR
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} fVYv 2
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SortUtil： %;#9lkOXWH
;L,yJ~
package org.rut.util.algorithm; D=B:tP
&`_|[Y ]H
import org.rut.util.algorithm.support.BubbleSort; eGUe#(I /
import org.rut.util.algorithm.support.HeapSort; 'cY@Dqg1
import org.rut.util.algorithm.support.ImprovedMergeSort; d>/4z#R}-
import org.rut.util.algorithm.support.ImprovedQuickSort; _I%mY!x\`
import org.rut.util.algorithm.support.InsertSort; r#d]"3tH
import org.rut.util.algorithm.support.MergeSort; Xy9'JVV6
import org.rut.util.algorithm.support.QuickSort; h1#l12k^'
import org.rut.util.algorithm.support.SelectionSort; U+uIuhz
import org.rut.util.algorithm.support.ShellSort; .:/X~{
~]BR(n
/** :I^4ILQCD
* @author treeroot M#yUdl7d
* @since 2006-2-2 qJ$S3B
* @version 1.0 R%JEx3)0m
*/ Lve$H(GHT
public class SortUtil { BbI),iP
public final static int INSERT = 1; S;BMM8U
public final static int BUBBLE = 2; nb@<UbabW}
public final static int SELECTION = 3; Y'y$k
public final static int SHELL = 4; &#@"^(} 6
public final static int QUICK = 5; ,88%eX|
public final static int IMPROVED_QUICK = 6; 8g/r8u~
public final static int MERGE = 7; /sVmQqVY
public final static int IMPROVED_MERGE = 8; K,*IfHi6[
public final static int HEAP = 9; QzYaxNGv
eXdH)|l,\
public static void sort(int[] data) { r<*Y1;7H'
sort(data, IMPROVED_QUICK); HPK}Z|Vl
} XlGB`P>?KD
private static String[] name={ /sl#M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TSsx^h8/
}; eoPoGC
mW)"~sA
private static Sort[] impl=new Sort[]{ C|rl",&
new InsertSort(), 'YEiT#+/
new BubbleSort(), e co=ia
new SelectionSort(), !Tu.A@
new ShellSort(), l`];CALA4
new QuickSort(), !p)cP"fa
new ImprovedQuickSort(), [ HjGdC
new MergeSort(), =IIE]<z
new ImprovedMergeSort(), ,=P0rbtK
new HeapSort() Q?%v b
}; +>v{#A_u
E eCgV{9B
public static String toString(int algorithm){ @T-}\AU
return name[algorithm-1]; _"'-fl98*
} H/ub=,Ej*
SHCVjI6
public static void sort(int[] data, int algorithm) { T f^O(
impl[algorithm-1].sort(data); 16I(S
} B^1Io9
c:}K(yAdd
public static interface Sort { _j<,qi
public void sort(int[] data); @HXXhYH
} 4_S%K&
N?Ss/by8Sg
public static void swap(int[] data, int i, int j) { Os1y8ui
int temp = data; `RE1q)o}8M
data = data[j]; dGc>EZSdj
data[j] = temp; 5xG/>fn
} !Jo.Un7
} t{/ EN)J