[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; tcSn`+Bu_`
} h<4WY#Y
int i1=l; ",(-AU!a)h
int i2=mid+1; VzA~w`$d
for(int cur=l;cur<=r;cur++){ ;<Oe\X
if(i1==mid+1) L:IaJ?+?
data[cur]=temp[i2++]; ~4.Tq{
else if(i2>r) <QQgOaS`2
data[cur]=temp[i1++]; vK!,vKa.
else if(temp[i1] data[cur]=temp[i1++]; F/tBr%RV
else 4gG&u33RrE
data[cur]=temp[i2++]; =7e~L 3 K
} ={~`0,
} E[/<AY^@!z
[~`; .7~
} A 7'dD$9
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改进后的归并排序: KVvIo1$N
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package org.rut.util.algorithm.support; s+2\uMwf*
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import org.rut.util.algorithm.SortUtil; "KcSOjvJ
Z=|:D,&
/** t~)w921>
* @author treeroot Vx;f/CH3!
* @since 2006-2-2 Bbz#$M!:
* @version 1.0 U O YM
*/ lfOF]Kiqr
public class ImprovedMergeSort implements SortUtil.Sort { *P5Xy@:
%E3|b6k\
private static final int THRESHOLD = 10; <,(6*b
_Xlf}BE
/* xop9*Z$
* (non-Javadoc) &dp(CH<De
* B#&U5fSw+0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dp8YzWL2^
*/ -A(]",*J
public void sort(int[] data) { 1 9$ufod
int[] temp=new int[data.length]; puG$\D-[
mergeSort(data,temp,0,data.length-1); $u|p(E:*
} 4Smno%jq
TW(rK&
private void mergeSort(int[] data, int[] temp, int l, int r) { %0YwaxXPn7
int i, j, k; p~J`}>yo
int mid = (l + r) / 2; e-sMU
if (l == r) _M8Q%
return; (~?P7RnU%
if ((mid - l) >= THRESHOLD) tbJB0T|G
mergeSort(data, temp, l, mid); 9`f]Rf"
else /(8Usu?g.
insertSort(data, l, mid - l + 1); ;+>-uPT/1
if ((r - mid) > THRESHOLD) /0s1q
mergeSort(data, temp, mid + 1, r); bmr.EB/
else L7el5Q!Y=
insertSort(data, mid + 1, r - mid); n,hHh=.Fu
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for (i = l; i <= mid; i++) { t/yGMR=
temp = data; 7G.IGXK$
} n7i;^=9mM
for (j = 1; j <= r - mid; j++) { IFlDw}M!9
temp[r - j + 1] = data[j + mid]; \9geDX9A
} [?r`8K2!,
int a = temp[l]; NC)Iu
int b = temp[r]; TFb9gOTJ
for (i = l, j = r, k = l; k <= r; k++) { JBtcl#|
if (a < b) { SSYE&
data[k] = temp[i++]; (/14)"Sk
a = temp; K{B[(](
} else { !R-M:|
data[k] = temp[j--]; fLA!oeq{&}
b = temp[j]; sn '#]yM
} /Z';#G,z
} wQgW9546
} u3(zixb
q+.DZ @
/** 51W\%aB
* @param data l3R`3@
* @param l Bf~
* @param i U=\ZeYK.
*/ x[U/ 8#f&
private void insertSort(int[] data, int start, int len) { 8G; t[9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?DzKqsS'
} sDTCV8"w
} n"N!76
} fWhwI+
} xbnx*4o0
U+CZv1
堆排序： C=2
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package org.rut.util.algorithm.support; |&`NB|
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import org.rut.util.algorithm.SortUtil; cq>{
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/** w&jyijk(
* @author treeroot f]L`^WU
* @since 2006-2-2 /5 B{szf
* @version 1.0 2>p K
*/ 58\Rl
public class HeapSort implements SortUtil.Sort{ xQ\/6|
57k@]3 4
/* (non-Javadoc) kA1]o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |6'(yn
*/ .0kltnB
public void sort(int[] data) { ~KHGh29
MaxHeap h=new MaxHeap(); ,#hS#?t
h.init(data); Gl}[1<~o
for(int i=0;i h.remove(); Ox7v*[x'
System.arraycopy(h.queue,1,data,0,data.length); X<dQq`kZ
} `CA-s
)XV|D
private static class MaxHeap{ ,X25-OFZ
];i-d7C
void init(int[] data){ ) (unL`y
this.queue=new int[data.length+1]; CE]0OY
for(int i=0;i queue[++size]=data; :akEl7/&
fixUp(size); 8,=N~(pd`
} Pz7{dQqjk#
} %K8Ei/p\t]
nAPSs]D
private int size=0; {G&*\5W
$"1Unu&P
private int[] queue; 0O<g)%Vz>
xpCzx=n3.m
public int get() { N7Vv"o
return queue[1]; l5_RG,O0A
} XdE#l/#
M}=X/*T
public void remove() { " 2A`M~
SortUtil.swap(queue,1,size--); S+Z_Qf
fixDown(1); GEj/Z};;[b
} \ofWD{*j
file://fixdown H^z6.!$m
private void fixDown(int k) { mz$)80ly
int j; QxZYy}2
while ((j = k << 1) <= size) { <9z2:^
if (j < size %26amp;%26amp; queue[j] j++; *@/1]W
if (queue[k]>queue[j]) file://不用交换 1Q"w)Ta
break; R#gt~]x6k
SortUtil.swap(queue,j,k); 1Z%^U ?
k = j; B64L>7\>`
} c<-F_+[
} xO?w8*d
private void fixUp(int k) { 8oiO:lyLSt
while (k > 1) { p vone,y2
int j = k >> 1; X3&-kU
if (queue[j]>queue[k]) 1><@$kVMm~
break; y|X</3w
SortUtil.swap(queue,j,k); 3Kuu9<0
k = j; !iUFD*~r~
} E0; }e
} Br^4N9
dS]TTU1
} J&Ig%&/
g$bbm}6S
} le60b@2G0
S.&=>
SortUtil： aVkgE>
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package org.rut.util.algorithm; <%w)EQf4m
qd$Y"~Mco
import org.rut.util.algorithm.support.BubbleSort; Y~z3fd
import org.rut.util.algorithm.support.HeapSort; 2..b/
import org.rut.util.algorithm.support.ImprovedMergeSort; _RI`I}&9Z
import org.rut.util.algorithm.support.ImprovedQuickSort; *+|D8xp
import org.rut.util.algorithm.support.InsertSort; )y>o;^5'
import org.rut.util.algorithm.support.MergeSort; xPMTmx?2
import org.rut.util.algorithm.support.QuickSort; A+Uil\%
import org.rut.util.algorithm.support.SelectionSort; *nJy
import org.rut.util.algorithm.support.ShellSort; u&{}hv&FY
\AFoxi2h
/** L3}n(KAJj
* @author treeroot M~%~y`D^
* @since 2006-2-2 );EW(7KeL
* @version 1.0 XG_h\NIL
*/ ^w]N#%k\H
public class SortUtil { yKupPp);
public final static int INSERT = 1; ]^aOYtKX
public final static int BUBBLE = 2; /zxLnT; 5
public final static int SELECTION = 3; yQ$Q{,S9
public final static int SHELL = 4; u\-WArntc
public final static int QUICK = 5; $Ro]]NUz|
public final static int IMPROVED_QUICK = 6; |,!]]YO.V
public final static int MERGE = 7; tFlLKziU
public final static int IMPROVED_MERGE = 8; qyi5j0)W
public final static int HEAP = 9; J)(KGdk
3"v k$
public static void sort(int[] data) { {Yq"%n'0
sort(data, IMPROVED_QUICK); EJC{!06L'/
} uu0"k<Tp
private static String[] name={ 0zJT_H+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #?=?<"*j
}; yTt,/+I%gJ
}E[u" @}
private static Sort[] impl=new Sort[]{ cyYsz'i m
new InsertSort(), XS:W{tL!
new BubbleSort(), X}"Ic@8
new SelectionSort(), `N<6)MX3>g
new ShellSort(), H}v.0R
new QuickSort(), '+?L/|'
new ImprovedQuickSort(), U|tUX)9O
new MergeSort(), aqL#g18
new ImprovedMergeSort(), 9Q\CJ9
new HeapSort() 4wLN#dpeEy
}; ,Sz`$'^c
\tv^],^`
public static String toString(int algorithm){ tc-pVw:TV
return name[algorithm-1]; War<a#0
} bUv}({
O5rHN;\_
public static void sort(int[] data, int algorithm) { s?-@8.@
impl[algorithm-1].sort(data); ]oOSL=~c
} k OYF]^uJ
8&[Lr o9
public static interface Sort { I^}q;L![\
public void sort(int[] data); FKYPkFB
} F+ ,eJ/]
~yX8p7qr
public static void swap(int[] data, int i, int j) { 6t zUp/O
int temp = data; Kjw==5)}
data = data[j]; Myj5qh
data[j] = temp; VkFvV><"
} MTnW5W-r9
} %E<.\\^%