[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; 'tvuw\hhL
} ,?k1if(0[
int i1=l; ,v,rY'
int i2=mid+1; 0H]{,mVs
for(int cur=l;cur<=r;cur++){ a@d 15CN
if(i1==mid+1) 9dBxCdpu
data[cur]=temp[i2++]; ,&qC R sw
else if(i2>r) t(9q6x3|e
data[cur]=temp[i1++]; }m~MN4 l
else if(temp[i1] data[cur]=temp[i1++]; @un+y9m[C
else S2_(lS+R
data[cur]=temp[i2++]; L+(ng
} zsJermF,O
} |ns?c0rM
)>S,#_e*b
} %W)pZN}
$(Mz@#%
改进后的归并排序: F= %A9b_a
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package org.rut.util.algorithm.support; `fTM/"
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import org.rut.util.algorithm.SortUtil; O#^H.B
c38XM]Jeq
/** 4=MjyH|[Jx
* @author treeroot CgrQ"N5
* @since 2006-2-2 J}:.I>
* @version 1.0 lM{fld
*/ xZlCFu
public class ImprovedMergeSort implements SortUtil.Sort { +38R#2JV
UL{J%Ze=~
private static final int THRESHOLD = 10; Xq&BL,lS
mPk'a
/* XW" 0:}`J
* (non-Javadoc) ]|+M0:2?
* 9|#cjHf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kuV7nsXiQ
*/ ``Q6R2[|)
public void sort(int[] data) { ;'= cNj
int[] temp=new int[data.length]; kMMgY?
mergeSort(data,temp,0,data.length-1); $i5J}
} W>)0=8#\
mpMAhm:
private void mergeSort(int[] data, int[] temp, int l, int r) { Cul=,;pkB
int i, j, k; +ovK~K$A
int mid = (l + r) / 2; *^~ =/:
if (l == r) tmooS7\a
return; gtZmBe=
if ((mid - l) >= THRESHOLD) 4]ni-u0*
mergeSort(data, temp, l, mid); E<[ s+iX
else a[(OeVQ5
insertSort(data, l, mid - l + 1); EZ]4cd/i
if ((r - mid) > THRESHOLD) g}xL7bTlI>
mergeSort(data, temp, mid + 1, r); Oo}h:3?
else pB8D
insertSort(data, mid + 1, r - mid); Y}N\|*ye-
r(46jV.sD:
for (i = l; i <= mid; i++) { L2ydyXIsd
temp = data; _y_}/
} {YzCgf
for (j = 1; j <= r - mid; j++) { f7lj,GAZ
temp[r - j + 1] = data[j + mid]; yXJ25Axb
} DfD >hf/
int a = temp[l]; YcN|L&R.
int b = temp[r]; )ffaOS!\
for (i = l, j = r, k = l; k <= r; k++) { nQjpJ /=
if (a < b) { '\tI|
data[k] = temp[i++]; cR/Nl pX
a = temp; jTvcKm|q
} else { %+N]$Q
data[k] = temp[j--]; Pc`d]*BYi
b = temp[j]; )Y7H@e\1
} t?4H9~iH
} A51 a/p#
} zVq!M-e
f\]?,
/** <gkE,e9
* @param data , ~O>8VbF
* @param l IMH4GVr"
* @param i $Es\ld
*/ K8;SE!
private void insertSort(int[] data, int start, int len) { 0\P5=hD)K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >.d/@3 '
} o$sD9xx
} %o0b~R
} P0,]`w
} IR6W'vA
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堆排序： /\w4k
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package org.rut.util.algorithm.support; 4]h/t&ppq
WiS3W;
import org.rut.util.algorithm.SortUtil; rPaJ<>Kz
&q-&%~E@
/** 4,I,f>V
* @author treeroot H9/!oI1P?
* @since 2006-2-2 rx1u*L
* @version 1.0 9&n9J^3L
*/ J:yv82
public class HeapSort implements SortUtil.Sort{ wUv?;Y$C
hG?y)g\A
/* (non-Javadoc) ]#)(D-i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Vx[
*/ +'<PW+U$
public void sort(int[] data) { "GO!^ZG]
MaxHeap h=new MaxHeap(); G% tlV&In
h.init(data); $[>{s9E
for(int i=0;i h.remove(); &<VU}c^!
System.arraycopy(h.queue,1,data,0,data.length); gwoe1:F:J
} *#T: _
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private static class MaxHeap{ h0tiWHw
PR%)3
void init(int[] data){ )@NFV*@I
this.queue=new int[data.length+1]; i1vz{Tc
for(int i=0;i queue[++size]=data; d4S4 e
fixUp(size); V*jl
} )QE6X67i
} r&]XNq'P9
Z<nNk.G
private int size=0; lYG`)#T
NN*L3yx
private int[] queue; jIubJQR~
}?s-$@$R
public int get() { 23gN;eD+m6
return queue[1]; FEjO}lTK
} *7xcwjeP
oy^-?+
public void remove() { $hhXsu=
SortUtil.swap(queue,1,size--); 0cS$S Mn{
fixDown(1); U>2KjZB
} 9 C[~*,qx
file://fixdown Nk7y2[
private void fixDown(int k) { I%5vI}
int j; t*IePz]/
while ((j = k << 1) <= size) { Lh[0B.g<
if (j < size %26amp;%26amp; queue[j] j++; ihrf/b
if (queue[k]>queue[j]) file://不用交换 fDy*dp4z
break; uy{O
SortUtil.swap(queue,j,k); ip-X r|Bq
k = j; f .O^R~,
} Kb%Y%j
} =XR~I
private void fixUp(int k) { MB)<@.A0
while (k > 1) { LYDiqOrx
int j = k >> 1; 4 Ej->T.
if (queue[j]>queue[k]) TKB8%/_p
break; n _K1%
SortUtil.swap(queue,j,k); d{S'6*`D
k = j; c4fH/-
} cp`Jep<T
} $${I[2R)
dc)%5fV\
} 7{m>W!
3``JrkPI
} oco,sxT
z!g$#hmL>
SortUtil： mw"FQ?bJ
iB)\*)
package org.rut.util.algorithm; *tqD:hiF
OJ&'Z}LB
import org.rut.util.algorithm.support.BubbleSort; <2pp6je\0s
import org.rut.util.algorithm.support.HeapSort; 6Z_V,LD9L
import org.rut.util.algorithm.support.ImprovedMergeSort; a|t~&\@
import org.rut.util.algorithm.support.ImprovedQuickSort; ~B;}jI]d[
import org.rut.util.algorithm.support.InsertSort; PuNL%D
import org.rut.util.algorithm.support.MergeSort; X:W\EeH
import org.rut.util.algorithm.support.QuickSort; ;J W]b]
import org.rut.util.algorithm.support.SelectionSort; Hu|Tj<S
import org.rut.util.algorithm.support.ShellSort; vb>F)X?b_
Ae>+Fcv
/** poQ_r<I
* @author treeroot r2RJb6
* @since 2006-2-2 *:L"#20:R
* @version 1.0 Z<X=00,wg
*/ eK7A8\;e
public class SortUtil { y0xBNhev
public final static int INSERT = 1; >=N-P<%
public final static int BUBBLE = 2; ~5P9^`KNH
public final static int SELECTION = 3; }097[-g7
public final static int SHELL = 4; v2;E Wp
public final static int QUICK = 5; 'zUV(K?2]
public final static int IMPROVED_QUICK = 6; |m's)
public final static int MERGE = 7; OJe!K:
public final static int IMPROVED_MERGE = 8; ]9YA~n\
public final static int HEAP = 9; u> {aF{
'yiv.<4
public static void sort(int[] data) { mx9vjWfy
sort(data, IMPROVED_QUICK); s@Q7F{z
} p"0#G&-
private static String[] name={ 1 uU$V =
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Bu*%+
}; +R*DE5dz
dj0%?g>
private static Sort[] impl=new Sort[]{ 9`f@"%h
new InsertSort(), sQgz}0_=)
new BubbleSort(), zH1;h
new SelectionSort(), kK75(x
new ShellSort(), }d.X2?
new QuickSort(), YoKE=ln7
new ImprovedQuickSort(), i9ySD
new MergeSort(), B#g~c<4<
new ImprovedMergeSort(), 0qN`-0Yk
new HeapSort() _mm(W=KiL
}; yY8zTWji_
Qz@_"wm[
public static String toString(int algorithm){ KYiJXE[Q-
return name[algorithm-1]; EDnNS
} Au2?f~#Fv
Htgo=7!?\3
public static void sort(int[] data, int algorithm) { B{/og*xd*1
impl[algorithm-1].sort(data); a"@f< wU~
} N:lE{IvRJ
,V1"Typ#<
public static interface Sort { _<AkM"
public void sort(int[] data); b+~_/;Y9
} Z^'~iU-?
T";evM66
public static void swap(int[] data, int i, int j) { sK#)k\w>
int temp = data; Z#.d7B"
data = data[j]; *EuX7LEu_
data[j] = temp; l,o'J%<%
} 1m5l((d
} Ey7zb#/<!