[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; XwKB+Yj0
} }u=-Y'!#]
int i1=l; 6j FD|
int i2=mid+1; Sga/i?!
for(int cur=l;cur<=r;cur++){ nATEv2:G
if(i1==mid+1) Voi`OCut
data[cur]=temp[i2++]; fdIO'L_
else if(i2>r) ZGUhje!
data[cur]=temp[i1++]; G+^Q _w
else if(temp[i1] data[cur]=temp[i1++]; VP|ga}(
else EkV LSur
data[cur]=temp[i2++]; #K8kz
} aKkG[qN
} Bn83W4M
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} K,7IBv,B[
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改进后的归并排序: |[ymNG
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package org.rut.util.algorithm.support; -6(u09mb_
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import org.rut.util.algorithm.SortUtil; [FHSFr E,5
g$c\(isY;
/** m{(G%n>E&
* @author treeroot 'lPt.*Y<u
* @since 2006-2-2 $"z|^ze
* @version 1.0 W0n/B&C
*/ o ]UG*2
public class ImprovedMergeSort implements SortUtil.Sort { s2-`}LL
VKW9Rn9Qg
private static final int THRESHOLD = 10; {&_1/
|/u&%w?W
/* Byx8`Cx1
* (non-Javadoc) &,pL3Qos
* =2[5g!qX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _~?N3G
*/ C NDf&dzX8
public void sort(int[] data) { 7^}np^[HB
int[] temp=new int[data.length]; 2f'3Vjp~G
mergeSort(data,temp,0,data.length-1); iElE-g@Ws
} P4xQ:$2!
Nf.6:=
private void mergeSort(int[] data, int[] temp, int l, int r) { `Pa)H
int i, j, k; |5o0N8!b[
int mid = (l + r) / 2; ZT>?[`Vgc
if (l == r) &F4khga`^:
return; `:hEc<_/
if ((mid - l) >= THRESHOLD) 1]wx Ru
mergeSort(data, temp, l, mid); ,G,'#]
else p<5ED\;N;
insertSort(data, l, mid - l + 1); W,<P])
if ((r - mid) > THRESHOLD) Q;]g9T[)
mergeSort(data, temp, mid + 1, r); xZJ r*
else 8]!%mrS
insertSort(data, mid + 1, r - mid); r|U'2+vn
@D<q=:k
for (i = l; i <= mid; i++) { mJBvhK9%
temp = data; s68&AB
} ''+6qH-.|]
for (j = 1; j <= r - mid; j++) { 7,.Hj&'B
temp[r - j + 1] = data[j + mid]; |a7W@LVYD
} ?}y{tav=
int a = temp[l]; a1lF8;[
int b = temp[r]; os|Y=a
for (i = l, j = r, k = l; k <= r; k++) { RcQo1
if (a < b) { XUf]gQu3=
data[k] = temp[i++]; vYT%e:8)q
a = temp; Nqih LUv
} else { 3z^l
data[k] = temp[j--]; X2avo|6e
b = temp[j]; F`W8\u'db
} 739J] M
} "I"(yiKD
} g. V6:>,
)sWC5\
/** yH\z+A|
* @param data (DzV3/+p^
* @param l iOCx7j{BS
* @param i *XRAM.
*/ h,:8TMJRRN
private void insertSort(int[] data, int start, int len) { 7_,)"J2^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "c[ D0{\{
} uWs5+
} >EQd;Af
} }]0f -}
} ?nWK s
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堆排序： 4wLp
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package org.rut.util.algorithm.support; O gQE1{C
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import org.rut.util.algorithm.SortUtil; x1\a_Kt
<S*o}:iB
/** QfI=
* @author treeroot 8mM^wT
* @since 2006-2-2 1BQB8i-,
* @version 1.0 q&.SB`
*/ =c{/ Z
public class HeapSort implements SortUtil.Sort{ Im9^mVe
7x *]
/* (non-Javadoc) !<psK[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o<\CA[
*/ TCW[;d
public void sort(int[] data) { Jf<+VJ>t
MaxHeap h=new MaxHeap(); -]1F]d
h.init(data); }@-4*5P3
for(int i=0;i h.remove(); P{ AJH1
System.arraycopy(h.queue,1,data,0,data.length); 8$SA"c)
} (+'*_
#!,tId
private static class MaxHeap{ oM`[&m.,
s`2Hf&%aZJ
void init(int[] data){ S`yY<1[O
this.queue=new int[data.length+1]; N O|&nqq,>
for(int i=0;i queue[++size]=data; G.KZZ-=_4
fixUp(size); aBX^Wd
} Y<X,(\iEHP
} l`s_Id#
9Ra_[1
private int size=0; n !ty\E
1-.UkdZ}
private int[] queue; X|Gsf= 1S
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public int get() { vh8{*9+
return queue[1]; :G#>):
} qq0bIfF\4
XP Nk#"
public void remove() { chE~UQ
SortUtil.swap(queue,1,size--); B2UQO4[w
fixDown(1); pgg4<j_mn
} _h#SP+>
file://fixdown !o.l:Mr
private void fixDown(int k) { !^ko"^p
int j; ZU%7m_zO
while ((j = k << 1) <= size) { P$MAURFm
if (j < size %26amp;%26amp; queue[j] j++; Yrb[:;Y
if (queue[k]>queue[j]) file://不用交换 /6_>d$
break; F?]nPb|
SortUtil.swap(queue,j,k); PqMU&H_
k = j; i*`;/x'+
} 2+pLDIIT
} Gq4~9Tm)*
private void fixUp(int k) { =y" lX{}G
while (k > 1) { g0-hN%=6
int j = k >> 1; _1w?nN'
if (queue[j]>queue[k]) <<>?`7N
break; Q>y2C8rnJ/
SortUtil.swap(queue,j,k); vJg|}]h>L
k = j; +'qzk>B
} !QoOL<(){
} k8E'wN
=k]RzeI
} <5*cc8
!Fa2F~#h
} }5#<`8
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SortUtil： yw'b^D/
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package org.rut.util.algorithm; ^Xjh?+WM
OyVdQ".
import org.rut.util.algorithm.support.BubbleSort; S5RQ
import org.rut.util.algorithm.support.HeapSort; 3| 5Af
import org.rut.util.algorithm.support.ImprovedMergeSort; ?YR/'Vq97
import org.rut.util.algorithm.support.ImprovedQuickSort; Bor_Kib
import org.rut.util.algorithm.support.InsertSort; WZ}c)r*R
import org.rut.util.algorithm.support.MergeSort; "qEHK;
import org.rut.util.algorithm.support.QuickSort; yE3g0@*
import org.rut.util.algorithm.support.SelectionSort; mO$]f4}
import org.rut.util.algorithm.support.ShellSort; <'H^}gQow
#&vP(4p
/** xmz83Ll9
* @author treeroot LO8V*H(
* @since 2006-2-2 w]w>yD>$
* @version 1.0 aagN-/mgm
*/ Cs$wgm*
public class SortUtil { l_JPkM(mJw
public final static int INSERT = 1; pNFL;k+p}
public final static int BUBBLE = 2; N_TWT&o4
public final static int SELECTION = 3; F-%wOn /
public final static int SHELL = 4; l%h0x*?$
public final static int QUICK = 5; ;c"T#CH.
public final static int IMPROVED_QUICK = 6; eaQ)r?M
public final static int MERGE = 7; fk%r?K6K
public final static int IMPROVED_MERGE = 8; ]Auk5M+
public final static int HEAP = 9; 7_>No*[
7VkT(xnm
public static void sort(int[] data) { aL@myq.
sort(data, IMPROVED_QUICK); VZNMom,Wr
} ;'!G?)PZ
private static String[] name={ |]`\ak
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oGpyuB@A/
}; )&[S*g
F3/aq+<P[
private static Sort[] impl=new Sort[]{ l;$HGoJ
new InsertSort(), _1[5~Pnh
new BubbleSort(), N(0G!sTI
new SelectionSort(), &i*/}OZz
new ShellSort(), @K`2y'#b
new QuickSort(), GD?4/HkF
new ImprovedQuickSort(), 9(k5Irv"'h
new MergeSort(), ]8*#%^
new ImprovedMergeSort(), Q/rOIHiI
new HeapSort() >YuBi:z
}; VYj hU?I
I, 9!["^|
public static String toString(int algorithm){ FCxLL"))
return name[algorithm-1]; 9:N@+;|T
} F)KUup)gc
9u";%5 4
public static void sort(int[] data, int algorithm) { .XR`iXY
impl[algorithm-1].sort(data); &VtTUy}
} Uu xbN-u
,Z*Fo: q
public static interface Sort { o|lEF+
public void sort(int[] data); [eI{vH{
} D4%5T>^LW[
h?[3{Z^
public static void swap(int[] data, int i, int j) { JgXP2|Y!
int temp = data; [r%WVf.#d
data = data[j]; qCg`"/0
data[j] = temp; 24Lo.
} ]fz0E:x
} kxU<?0