[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; =0U"07%}
} |@ZyD$?
int i1=l; jm|zn
int i2=mid+1; Rn whkb&&
for(int cur=l;cur<=r;cur++){ N4_V
if(i1==mid+1) k#@)gL
data[cur]=temp[i2++]; %bnjK#o"Q
else if(i2>r) ;u%4K$
data[cur]=temp[i1++]; JAL"On#c#0
else if(temp[i1] data[cur]=temp[i1++]; Ly/5"&HD
else eR8>5:V_
data[cur]=temp[i2++]; 'ka"0~:NS{
} stCFLYox
} yD ur9Qd6
lzZ=!dG
} ZOzyf/?.
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改进后的归并排序: 5YiBw|Z7 "
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package org.rut.util.algorithm.support; :Z5kiEwYM
>LB x\/
import org.rut.util.algorithm.SortUtil; h6Hop mWVx
@]{:juD~
/** tbi(e49S
* @author treeroot gem+$TFq
* @since 2006-2-2 /^Lo@672
* @version 1.0 ,PyPRPk
*/ rg+3pX\{
public class ImprovedMergeSort implements SortUtil.Sort { ]h&?^L<.
z:W1(/W~
private static final int THRESHOLD = 10; ~leLQsZ
:&D$Q 4
/* gq?~*4H
* (non-Javadoc) c6pGy%T-
* S4X['0rX!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7otqGE\2
*/ mZ t:
public void sort(int[] data) { C;!h4l7L
int[] temp=new int[data.length]; c\eT`.ENk
mergeSort(data,temp,0,data.length-1); u]Y NF[]
} DWJkN4}o
X`n*M]
private void mergeSort(int[] data, int[] temp, int l, int r) { g.O? 1bebe
int i, j, k; v&ZI<Xt+
int mid = (l + r) / 2; e?b<-rL
if (l == r) $L$GI~w/
return; p/uOCQ|1l
if ((mid - l) >= THRESHOLD) <b;Oap3
mergeSort(data, temp, l, mid); vro5G')
else D D Crvl
insertSort(data, l, mid - l + 1); F30jr6F\
if ((r - mid) > THRESHOLD) !HHbd|B_
mergeSort(data, temp, mid + 1, r); ?{6[6T
else SjOIln
insertSort(data, mid + 1, r - mid); @-qC".CI
()i!Uo
for (i = l; i <= mid; i++) { QJ-?67_i
temp = data; !J@pox-t
} `<l|XPv
for (j = 1; j <= r - mid; j++) { ,TxZ:f`"
temp[r - j + 1] = data[j + mid]; uv dx>5]
} kOuQR$9s
int a = temp[l]; ^l/$ 13=
int b = temp[r]; }u7&SU
for (i = l, j = r, k = l; k <= r; k++) { q&wXs/$a
if (a < b) { 6Bm2_B
data[k] = temp[i++]; 84dej<
a = temp; 0<S(zva7([
} else { @AdJu-u
data[k] = temp[j--]; /waZ9
b = temp[j]; [?`c>
} :`P;(h
} tlFc+3
} IsCJdgG
EMejvPnZO
/** {VE$i2nC8
* @param data P X<,/6gz
* @param l Mky8qVQ2
* @param i =1vVITwl
*/ [f'DxZF-
private void insertSort(int[] data, int start, int len) { CSooJ1Ep~'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Iq[,)$
} $/(H%f&
} a?!Joi[
} SB[,}h<u1
} KhV; />(
(Dl68]FX
堆排序： y0'"
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package org.rut.util.algorithm.support; 0-+`{j
Vkb&' rXw+
import org.rut.util.algorithm.SortUtil; ^i^S1h"
j{'@g[HW
/** gB@Wv91
* @author treeroot .tb~f@xL
* @since 2006-2-2 3,B[%!3d
* @version 1.0 I1H:h
*/ <cz~q=%v2&
public class HeapSort implements SortUtil.Sort{ wB( igPi
l9.wMs*`X
/* (non-Javadoc) ),6Z1 K1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c$'UfW
*/ SwuadN
public void sort(int[] data) { ;"nEEe]?
MaxHeap h=new MaxHeap(); HnqZ7%jeN
h.init(data); U-s6h;^O
for(int i=0;i h.remove(); M$gy J!Pb
System.arraycopy(h.queue,1,data,0,data.length); f i!wrvO
} o&~z8/?LA
wEMUr0Hq
private static class MaxHeap{ c(AjM9s
&4DV]9+g
void init(int[] data){ h OboM3_
this.queue=new int[data.length+1]; qwaw\vOA
for(int i=0;i queue[++size]=data; `czXjZE
fixUp(size); L4;n$=e
} 2s6Hr;^w.1
} {_/6,22j(V
I>-jKSkwc
private int size=0; tZXtt=M w
MOmp{@
private int[] queue; aTs_5q
^HL#)fK2I
public int get() { Rb~Kyy$
return queue[1]; ZcO!cR&*'J
} "=f*Lk@[
n5]<|>Uvx
public void remove() { ;|/7o@$n
SortUtil.swap(queue,1,size--); 3G8uXB_`}
fixDown(1); 6]gs{zG
} `u-VGd\
file://fixdown J= |[G'
private void fixDown(int k) { "rjJ"u1
int j; -RH ?FJ
while ((j = k << 1) <= size) { =C\S6bF%
if (j < size %26amp;%26amp; queue[j] j++; ak;Z;
if (queue[k]>queue[j]) file://不用交换 r$\g6m
break; ~0 FqY&4
SortUtil.swap(queue,j,k); Y!*,G]7
k = j; xG}eiUbM`
} +ic~Sar
} *}w.xt
private void fixUp(int k) { SKfv.9
while (k > 1) { iKS9Xss8
int j = k >> 1; U.6hLFcE
if (queue[j]>queue[k]) 9 [I ro
break; Da@tpKU)p
SortUtil.swap(queue,j,k); H_8@J
k = j; "a"[B'
} ld@f:Zali
} _Wb-&6{
*,-YWx4
} P7y[9|^
%""CacX
} _1R`xbV
WAdl@){
SortUtil： xZhD6'Zzz
5^d%+*l;q
package org.rut.util.algorithm; s_*eX N
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import org.rut.util.algorithm.support.BubbleSort; )v-* WreS
import org.rut.util.algorithm.support.HeapSort; \iE'E
import org.rut.util.algorithm.support.ImprovedMergeSort; Om1z
import org.rut.util.algorithm.support.ImprovedQuickSort; tt[_+e\4
import org.rut.util.algorithm.support.InsertSort; %mYIXsuH
import org.rut.util.algorithm.support.MergeSort; y=j[v},4
import org.rut.util.algorithm.support.QuickSort; bL[PNUG
import org.rut.util.algorithm.support.SelectionSort; Iw<c 9w8
import org.rut.util.algorithm.support.ShellSort; [a |fm*B!
v S+~4Q41
/** \qTNWA#'
* @author treeroot RY~)MS _C
* @since 2006-2-2 B6pz1P?e}
* @version 1.0 Sl_zO?/PF
*/ B]qh22Yib
public class SortUtil { ^LcI6h
public final static int INSERT = 1; YI|Gpq
public final static int BUBBLE = 2; ?\pE#~m
public final static int SELECTION = 3; Y3zO7*-@
public final static int SHELL = 4; ;_SS3q
public final static int QUICK = 5; 1Ev+':%
public final static int IMPROVED_QUICK = 6; IIR?@/q
public final static int MERGE = 7; 2b"5/$|6
public final static int IMPROVED_MERGE = 8; bT*4Qd4W
public final static int HEAP = 9; nRE}F5k
1aDDl-8,
public static void sort(int[] data) { yR$_$N+E
sort(data, IMPROVED_QUICK); ( gFA? aD<
} &sNID4FR
private static String[] name={ Vlz T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `x#~-
}; GSFT(XX
t/D Q<B_
private static Sort[] impl=new Sort[]{ 1*jL2P]D
new InsertSort(), :hr@>Y~r
new BubbleSort(), k2WO*xa*
new SelectionSort(), ~R8yj(
new ShellSort(), @}Z/{Z[@
new QuickSort(), V$_0VN'+Z
new ImprovedQuickSort(), @ixX?N)V
new MergeSort(), #<e7 Y0
new ImprovedMergeSort(), Rj&7|z
new HeapSort() Gehl/i-
}; U+RPn?Q
&e)p6Egl
public static String toString(int algorithm){ 9}mp,egV
return name[algorithm-1]; ,Ex\\p-
} E9:hK
bOdv]nQ1
public static void sort(int[] data, int algorithm) { %Uk/P
impl[algorithm-1].sort(data); lG+ltCc$9
} qR<DQTO<
$"(YE #]|
public static interface Sort { Xda<TX@-
public void sort(int[] data); (KMobIP^
} eEh0T%9K
&aQ)x
public static void swap(int[] data, int i, int j) { =arsoCa
int temp = data; MB 5[Js|
data = data[j]; DQICD.X6R
data[j] = temp; KEN-G
} -]A#G`'
} .%<&W1