[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; '!|E+P-
} ZPG8q
int i1=l; "78cl*sD
int i2=mid+1; L>R!A3G1
for(int cur=l;cur<=r;cur++){ 1{uDHB
if(i1==mid+1) V.OoZGE>]
data[cur]=temp[i2++]; (WU~e!}
else if(i2>r) p%M(G#gOgP
data[cur]=temp[i1++]; zs]>XO~Jg
else if(temp[i1] data[cur]=temp[i1++]; wxr}*Z:ZMa
else qLktMp_
data[cur]=temp[i2++]; 5xn0U5U
} /[)P^L`
} b^=8%~?%4
kY |=a
} `\/Wah}I
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改进后的归并排序: X|QX1dl
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package org.rut.util.algorithm.support; $K>d\{@+7
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import org.rut.util.algorithm.SortUtil; iz|9a|k6x
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/** *^$N$t/2
* @author treeroot e715)_HD
* @since 2006-2-2 66y,{t
* @version 1.0 W} +6L|
*/ oY#XWe8Om
public class ImprovedMergeSort implements SortUtil.Sort { IEKX'+t'
g5TLX&Bd
private static final int THRESHOLD = 10; dT-O8
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/* :WKyEt!3
* (non-Javadoc) ,C12SM*@
* (V|q\XS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w `9GygS
*/ t6U+a\-<
public void sort(int[] data) { 98%a)s)(a
int[] temp=new int[data.length]; Q,LWZw~"
mergeSort(data,temp,0,data.length-1); L[9+xK^g
} f>JzG,-
w})&[d
private void mergeSort(int[] data, int[] temp, int l, int r) { W SeRV?+T
int i, j, k; =P+wp{?AN|
int mid = (l + r) / 2; cH8H)55F
if (l == r) 0eu$oel-
return; =GS_ G;Dz
if ((mid - l) >= THRESHOLD) 74!JPOpQH
mergeSort(data, temp, l, mid); uX5B>32
else x+j/v5
insertSort(data, l, mid - l + 1); 5D@Q1
if ((r - mid) > THRESHOLD) Q?'W >^*J
mergeSort(data, temp, mid + 1, r); &I">{J<
else oGjYCVc
insertSort(data, mid + 1, r - mid); Y&Nv>o_}5
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for (i = l; i <= mid; i++) { gZuR4Ti
temp = data; N pIlQaMo4
} Fu=VY{U4
for (j = 1; j <= r - mid; j++) { bsS|!KT
temp[r - j + 1] = data[j + mid]; E52:c]<'m
} ZCq\Zk1O&
int a = temp[l]; mgl' d
int b = temp[r]; 'k) P(H
for (i = l, j = r, k = l; k <= r; k++) { HrcnyQ`Q0
if (a < b) { l~>rpG
data[k] = temp[i++]; gA8u E
a = temp; *h8XbBZH
} else { fwGz00C/U
data[k] = temp[j--]; lu(Omds+
b = temp[j]; +/^q"/f F
} &b:Zln.j
} #B{F{,vlu,
} =$`")3y3
2/W0y!qh1
/** e&I.kC"j6
* @param data R~u7;Wv
* @param l D}=i tu
* @param i ry=[:\Z~
*/ }T(q"Vf~
private void insertSort(int[] data, int start, int len) { T%b^|="@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]7ZC>.t
} 6v#sq
} qdnNapWnc
} IQ`aDo-V
} Lgw@y!Llij
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堆排序： (W6\%H2u
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package org.rut.util.algorithm.support; ?9M+fi
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import org.rut.util.algorithm.SortUtil; yD'h5)yu
&~6O;}\
/** E&=?\KM
* @author treeroot y")>"8H
* @since 2006-2-2 G&B}jj
* @version 1.0 X%qR6mMfT7
*/ x{w?X.Nt
public class HeapSort implements SortUtil.Sort{ `9)2nkJk'z
Rf$6}F
/* (non-Javadoc) eHZl-|-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;(Va_
*/ w9}IM149
public void sort(int[] data) { F>nrV
MaxHeap h=new MaxHeap(); 3m9E2R,
h.init(data); B}bNl 7 ~
for(int i=0;i h.remove(); Cd*C^cJU&z
System.arraycopy(h.queue,1,data,0,data.length); )x $Vy=
} YtKX\q^.
7"U,N;y
private static class MaxHeap{ xL#oP0d<e
0([jD25J!
void init(int[] data){ ))zaL2UP.
this.queue=new int[data.length+1]; un%"s:
for(int i=0;i queue[++size]=data; 7Et(p'
fixUp(size); =I3U.^:
} BuO J0$
} ^@cX0_
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private int size=0; N>iCb:_ T;
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private int[] queue; *m/u3.\
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public int get() { 4&WzGnK
return queue[1]; _Xe< JJvq
} ^W*)3;5
5.;$9~d
public void remove() { ]zAg6*-/B
SortUtil.swap(queue,1,size--); p#NZ\qJ
fixDown(1); ZSf+5{2m
} rI$10R$+H
file://fixdown /v<8x?=
private void fixDown(int k) { 2,`mNjHh
int j; ;hp; Rd
while ((j = k << 1) <= size) { 'KrkCA
if (j < size %26amp;%26amp; queue[j] j++; cMKh+r
if (queue[k]>queue[j]) file://不用交换 }z:=b8}
break; Qc/J"<Lx
SortUtil.swap(queue,j,k); +#9 (T
k = j; LLN^^>5|l
} msJn;(Pn
} ioQlC4Y
private void fixUp(int k) { G*V 7*KC
while (k > 1) { Sv",E@!f
int j = k >> 1; At:C4>HE@
if (queue[j]>queue[k]) x=+H@YO\
break; !9Ni[8&Fg0
SortUtil.swap(queue,j,k); @1X1E 2:
k = j; <FLc0s
} ~)(Dm+vZ
} q|\Cp
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} b&&'b)
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} yFv3>\
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SortUtil： cViCWc2
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package org.rut.util.algorithm; qN(;l&Q
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import org.rut.util.algorithm.support.BubbleSort; g_=ZcGC
import org.rut.util.algorithm.support.HeapSort; <Z_`^~!
import org.rut.util.algorithm.support.ImprovedMergeSort; xJlq2cK
import org.rut.util.algorithm.support.ImprovedQuickSort; m#P&Yd4T
import org.rut.util.algorithm.support.InsertSort; )`0 j\
import org.rut.util.algorithm.support.MergeSort; kv2:rmv
import org.rut.util.algorithm.support.QuickSort; H%V[% T4=
import org.rut.util.algorithm.support.SelectionSort; R'U(]&e.j
import org.rut.util.algorithm.support.ShellSort; EwsJa3 `
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/** CdjGYS
* @author treeroot zc5_;!t
* @since 2006-2-2 <taW6=;c
* @version 1.0 P@ u%{
*/ NmXTk+,L#
public class SortUtil { oyY,uB.|
public final static int INSERT = 1; cgAcAcmY
public final static int BUBBLE = 2; }P#gXG
public final static int SELECTION = 3; U^I'X7`r
public final static int SHELL = 4; fx5vaM!
public final static int QUICK = 5; pj`-T"Q
public final static int IMPROVED_QUICK = 6; pDT6>2t
public final static int MERGE = 7; |\ L2q/u
public final static int IMPROVED_MERGE = 8; j=LF1dG"
public final static int HEAP = 9; R8)"M(u=l
,\IZ/1
public static void sort(int[] data) { (Nf.a4O
sort(data, IMPROVED_QUICK); it@s(1EO#
} c{q`uI;O
private static String[] name={ W1z5|-T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =nl,5^
}; 1lM0pl6M
oB@C-(M
private static Sort[] impl=new Sort[]{ h !1c(UR
new InsertSort(), {I ,'
new BubbleSort(), g*uO IF
new SelectionSort(), 1d6pQ9 N
new ShellSort(), |ouk;r24V
new QuickSort(), Uw!v=n3#!
new ImprovedQuickSort(), TgLlmU*qMU
new MergeSort(), 8jk*N
new ImprovedMergeSort(), J\BdC];
new HeapSort() =W=%!A\g
}; #</yX5!V
xUUp?]9y
public static String toString(int algorithm){ C}Q2UK-:
return name[algorithm-1]; 2I
} 195(Kr<5$
$qqusa}`K
public static void sort(int[] data, int algorithm) { jEadVM9
impl[algorithm-1].sort(data); [0Sd +{Q
} i`X{pEKP+
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public static interface Sort { O(VV-n7U
public void sort(int[] data); X"]ZV]7(]s
} 'n=D$j]X
}Z|a?J@CZm
public static void swap(int[] data, int i, int j) { slbV[xR
int temp = data; ~F-,Q_|-
data = data[j]; >JhQ=j
data[j] = temp; %WR
} - U|4`{PP
} U+z&jdnhDR