[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; l2._Z Py
} mD=x3d
int i1=l; UoBmS5
int i2=mid+1; *7`;{O
for(int cur=l;cur<=r;cur++){ iVwI}%k
if(i1==mid+1) _6xC4@~h*
data[cur]=temp[i2++]; abx/h#_q
else if(i2>r) %Q]m6ciAM
data[cur]=temp[i1++]; 3)p#}_u{
else if(temp[i1] data[cur]=temp[i1++]; RCgZ GP
else {rf.sN~M
data[cur]=temp[i2++]; vm 1vX;
} "0pu_
} IL*C/y
SfEgmp-m
} %h(J+_"L6
#]cO] I
改进后的归并排序: )jm}h7,
hvwKhQ}wX
package org.rut.util.algorithm.support; (TgLCT[@T
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import org.rut.util.algorithm.SortUtil; :$L^l{gT
lN-vFna
/** <$qe2FtUq
* @author treeroot A )tGB&
* @since 2006-2-2 1 cvoI
* @version 1.0 J7c(qGJI2
*/ .T#h5[S2x
public class ImprovedMergeSort implements SortUtil.Sort { 9jBP|I{xI
0X!A'
private static final int THRESHOLD = 10; |eU{cK~e^
au1uFu-
/* *@^9]$*$
* (non-Javadoc) L9W'TvTwo
* 4|ML#aRz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _H}8eU
*/ PuYAoKG
public void sort(int[] data) { $~W=)f9
int[] temp=new int[data.length]; WzDL(~m+Z
mergeSort(data,temp,0,data.length-1); =c8xg/
} A]c'`Nf
DI"KH)XD
private void mergeSort(int[] data, int[] temp, int l, int r) { .hPk}B/KV
int i, j, k; ^T2o9f
int mid = (l + r) / 2; ] -iMo4H
if (l == r) avxr|uk
return; FN0)DN2d}
if ((mid - l) >= THRESHOLD) td@I ;d2
mergeSort(data, temp, l, mid); 3k3-Ts
else /Ps/m!
insertSort(data, l, mid - l + 1); 8A'oK8Q
if ((r - mid) > THRESHOLD) QMwrt
mergeSort(data, temp, mid + 1, r); 3)cH\gsg9
else AAuH}W>n
insertSort(data, mid + 1, r - mid); w#0/&\b=
~}Xd{afo
for (i = l; i <= mid; i++) { !Pd@0n4
temp = data; "{>BP$Jz
} n-P<y
for (j = 1; j <= r - mid; j++) { (qo ?e2K
temp[r - j + 1] = data[j + mid]; ,yf2kU
} s3<gq x-&r
int a = temp[l]; qca,a3k
int b = temp[r]; B6UTooj
for (i = l, j = r, k = l; k <= r; k++) { `X)y5*##wq
if (a < b) { Lp31Y .4
data[k] = temp[i++]; )seeBm-`
a = temp; Wz{,N07Q#{
} else { ^1`Mz<
data[k] = temp[j--]; %j $r"
b = temp[j]; ^`iqa-1
} ^jhc(ZW"
} GW{e"b/x
} &;3iHY;
g A+p^`;[
/** Y.yiUf/Q
* @param data AdU0 sZ+&c
* @param l _"l2UDx
* @param i f^Io:V\
*/ t9l]ie{"o.
private void insertSort(int[] data, int start, int len) { $Iz*W]B!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T"IDCT'z
} !1m7^3l7j
} h8XoF1wuw
} {3Y R_^>?
} = q\TWz
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堆排序： emT/5'y
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package org.rut.util.algorithm.support; {HO,d{{
&s^t~>Gpr
import org.rut.util.algorithm.SortUtil; \RT3#X+
_|jEuif
/** ZX0#I W
* @author treeroot 0q6xXNAX
* @since 2006-2-2 CXiDe)|<E
* @version 1.0 V*6o|#
*/ h[ cqa
public class HeapSort implements SortUtil.Sort{ tn38T%
u7nTk'#r
/* (non-Javadoc) W*;r}!ro
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Szn,
*/ S\M+*:7
public void sort(int[] data) { KOhK#t>H@0
MaxHeap h=new MaxHeap(); awB+B8^s
h.init(data); U%rEW[j
for(int i=0;i h.remove(); A<}nXHs-
System.arraycopy(h.queue,1,data,0,data.length); YQ|o0>
} R :*1Y\o(
l6T^e@*
private static class MaxHeap{ y0]"qB
\ gO!6
void init(int[] data){ O>y*u8
this.queue=new int[data.length+1]; 2`^M OGYk
for(int i=0;i queue[++size]=data; MFyi#nq
fixUp(size); U6?3 z
} fnJx$PD~
} .k -!/^
VX:Kq<XwQ
private int size=0; oM^VtH=>
>PYc57S1c
private int[] queue; l@:&0id4I
j4wsDtmAU
public int get() { PR3i}y>
return queue[1]; 6o.Dgt/f
} ntxaFVD
X=@bzL;eq
public void remove() { NOSLb];
SortUtil.swap(queue,1,size--); Hb3..o:
fixDown(1); ku)/ 8Z`$
} )mH(Hx
file://fixdown )8E[xBaO
private void fixDown(int k) { Y41b8.|P+
int j; kx%\Cz
while ((j = k << 1) <= size) { o&$Of
if (j < size %26amp;%26amp; queue[j] j++; 6 \?GY
if (queue[k]>queue[j]) file://不用交换 4(? Z1S
break; cTja<*W^xv
SortUtil.swap(queue,j,k); (c S'Nm5
k = j; p`Ok(C_
} r ?<?0j
} fQxlYD'peb
private void fixUp(int k) { Z|B`n SzH
while (k > 1) { Gs/G_E(T
int j = k >> 1; SveP:uJA[
if (queue[j]>queue[k]) %O9P|04]3
break; gI/SA
SortUtil.swap(queue,j,k); gb=tc`
k = j; q{}U5(,{0
} !{F\\D/
} W'PW;.,
=j%ORD[
} O[8wF86R
FI@kE19
} -I:L6ft8
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SortUtil： 8&:dzS
C:_-F3|]cJ
package org.rut.util.algorithm; MKh}2B#S
by$S#ef
import org.rut.util.algorithm.support.BubbleSort; S;SI#Vg@
import org.rut.util.algorithm.support.HeapSort; !KtP> `8
import org.rut.util.algorithm.support.ImprovedMergeSort; ikb;,Js
import org.rut.util.algorithm.support.ImprovedQuickSort; p#N2K{E
import org.rut.util.algorithm.support.InsertSort; ~ Ofn&[G
import org.rut.util.algorithm.support.MergeSort; nTE\EZ+=2
import org.rut.util.algorithm.support.QuickSort; WM0-F@_
import org.rut.util.algorithm.support.SelectionSort; D1V^DbUm_
import org.rut.util.algorithm.support.ShellSort; ;ykX]5jGh
bSW~hyI w
/** 8w ]'U
* @author treeroot 2]5ux!Lqln
* @since 2006-2-2 |ADg#oX
* @version 1.0 U9XOs)^
*/ 0pBG^I`_
public class SortUtil { CN6b982&
public final static int INSERT = 1; _4LDzVjNRe
public final static int BUBBLE = 2; ?]\v%[ho
public final static int SELECTION = 3; ybcCq]cgt
public final static int SHELL = 4; +FC+nE}O
public final static int QUICK = 5; #.2} t0*]5
public final static int IMPROVED_QUICK = 6; 8"ulAx74>
public final static int MERGE = 7; M y!;N1
public final static int IMPROVED_MERGE = 8; ;vUw_M{P=)
public final static int HEAP = 9; +vYVx<uTQ
au+a7~0~
public static void sort(int[] data) { lT8^BT
sort(data, IMPROVED_QUICK); nu X`>Oy
} *>T@3G.{Rm
private static String[] name={ zCrM~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JD~]aoH
}; KkSv23In
d&X <&)a7
private static Sort[] impl=new Sort[]{ A<-3u
new InsertSort(), A/OGF>
new BubbleSort(), #Wt1Ph_;
new SelectionSort(), lrmz'M'
new ShellSort(), v{) *P.E
new QuickSort(), <%"CQT6g%
new ImprovedQuickSort(), 8*sP
new MergeSort(), U3pMv|b
new ImprovedMergeSort(), rs@qC>_C0
new HeapSort() `jT1R!$3F
}; s-S|#5
5r^u7k
public static String toString(int algorithm){ 7Pr5`#x#
return name[algorithm-1]; `<?((l%;R
} FD.L{
4Z/]7Ie
public static void sort(int[] data, int algorithm) { |Gt]V`4
impl[algorithm-1].sort(data); 30QQnMH3
} xKXD`-|W
6~Y`<#X5J
public static interface Sort { 0T:ZWRjH
public void sort(int[] data); vl5r~F
} mam(h{f$
`IK3e9QpcA
public static void swap(int[] data, int i, int j) { $B@K
int temp = data; }#E~XlX^
data = data[j]; h|.*V$3
data[j] = temp; L)_L#]Yy
} sX]ru^F3
} C6c]M@6