[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; ;:Yz7<>Y,
} t& *K
int i1=l; Y[8GoqE|
int i2=mid+1; L PDx3MS
for(int cur=l;cur<=r;cur++){ 'on8r*
if(i1==mid+1) T+0Z2H
data[cur]=temp[i2++]; "E6*.EtTN#
else if(i2>r) c^?+"7oO0
data[cur]=temp[i1++]; X<j(AAHE
else if(temp[i1] data[cur]=temp[i1++]; $U]KIHb
else P>i!f!o*I
data[cur]=temp[i2++]; nKO4o8js{{
} D=0^"7K
} m"r=p
"6<L) 8
} 4$wn8!x2|
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改进后的归并排序: )Gu:eYp+`
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package org.rut.util.algorithm.support; $YNWT\FE
k^Gf2%k
import org.rut.util.algorithm.SortUtil; RTJ\|#w
t.ci!#/d
/** !=Hu?F p
* @author treeroot e[:i`J2
* @since 2006-2-2 vpoYb
* @version 1.0 WcG}9)9
*/ XuY#EJbZ
public class ImprovedMergeSort implements SortUtil.Sort { !I8m(axW
v"LH^!/
private static final int THRESHOLD = 10; n;F/}:c_a
8(b C.
/* KH~o0 W
* (non-Javadoc) j-R9=vB2
* 1c%ee$Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K4{1}bU{>
*/ zIeJ[J@
public void sort(int[] data) { &6#>a"?"
int[] temp=new int[data.length]; YIc|0[ ]*|
mergeSort(data,temp,0,data.length-1); 8q5 `A Gl
} 7@6B\':
C~r(*nr
private void mergeSort(int[] data, int[] temp, int l, int r) { A.%MrgOOX
int i, j, k; ,?k~>,{3
int mid = (l + r) / 2; ,*r}23
if (l == r) z87_/(nu
return; :9O"?FE
if ((mid - l) >= THRESHOLD) `/4R$E{
mergeSort(data, temp, l, mid); DA(ur'D
else /p PSo
insertSort(data, l, mid - l + 1); TJhzyJ"t
if ((r - mid) > THRESHOLD) X;vfbF
mergeSort(data, temp, mid + 1, r); .Z0$KQ'iy
else a*g7uaoP
insertSort(data, mid + 1, r - mid); T0Kjnzs
naHQeX;
for (i = l; i <= mid; i++) { O #
temp = data; !/qQ:k-.
} W~QH"Sq
for (j = 1; j <= r - mid; j++) { ]w+n39da
temp[r - j + 1] = data[j + mid]; G)S(a4
} 6zf3A:]&{
int a = temp[l]; cj5;XK
int b = temp[r]; !gKz=-C
for (i = l, j = r, k = l; k <= r; k++) { 1\{_bUZ&
if (a < b) { R'Uw17I
data[k] = temp[i++]; eM1=r:jgE
a = temp; &{5v[:$
} else { N"M?kk,
data[k] = temp[j--]; 4L`<xX;:{
b = temp[j]; v[*&@aW0n
} MB:VACCr
} 2l YA% n
} U^@8ebv
;G=:>m~
/** )}[:.Zg,3/
* @param data ET1>&l:.
* @param l ui[E,W~
* @param i ' thEZ
*/ p[&6hXTd
private void insertSort(int[] data, int start, int len) { ~dm/U7B:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -UMPt"o
} n_qDg
} d${RZ}/
} uh8+Y%V p
} #zL0P>P'a
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堆排序： =ll{M{0Q]!
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package org.rut.util.algorithm.support; v6$ }saTX
"4,Zox{^
import org.rut.util.algorithm.SortUtil; Jy?#@/~
(X(296<;
/** nG+L'SmI
* @author treeroot wRATe 0'
* @since 2006-2-2 OSDx
* @version 1.0 >,#73u#
*/ ,];4+&|8kW
public class HeapSort implements SortUtil.Sort{ F-g7*
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/* (non-Javadoc) '(4#He?Gd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D{J+}*y
*/ VZRM=;V
public void sort(int[] data) { O6Gg?j
MaxHeap h=new MaxHeap(); mH/$_x)o
h.init(data); `~.0PnHf
for(int i=0;i h.remove(); UyWKE<
System.arraycopy(h.queue,1,data,0,data.length); aV6l"A]
} M10u?
0nDlqy6b1b
private static class MaxHeap{ JOA_2qa>\
Bp.z6x4
void init(int[] data){ QSNLo_z
this.queue=new int[data.length+1]; -T 5$l
for(int i=0;i queue[++size]=data; rP=!!fC1;
fixUp(size); #SR"Q`P
} '~Z#h P
} FX6*`
=q4QBAW
private int size=0; vA(')"DDT
kV mJG#
private int[] queue; 1q&gTvIp
EA/+~ux
public int get() { =)p/p6
return queue[1]; a33SY6.
} !FhiTh:GCh
x,3oa_'E
public void remove() { +"!=E erKi
SortUtil.swap(queue,1,size--); G]T A7~VT
fixDown(1); cHG>iW9C
} ti)4J2c,8
file://fixdown rf%NfU
private void fixDown(int k) { v.aSf`K
int j; m&h5u,
while ((j = k << 1) <= size) { @Qa)@'u
if (j < size %26amp;%26amp; queue[j] j++; unUCn5hJ=
if (queue[k]>queue[j]) file://不用交换 7fB:wPlG;
break; S&rfMRP
SortUtil.swap(queue,j,k); q%/ciPgE
k = j; g3i !>
} luEP5l2&
} jgb>:]:
private void fixUp(int k) { FsbX{
while (k > 1) { NyJ=^=F#
int j = k >> 1; @$ea-fK??
if (queue[j]>queue[k]) ~ 3HI;
break; z [qO5z~I
SortUtil.swap(queue,j,k); }k-rOi'jL
k = j; SLiQHWw*J
} *Y2d!9F}Sa
} 4/rdr80
n<x NE%
} 8+b ?/Rn0
>H,t^i}@
} in^Rf` "
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SortUtil： )$wX~k
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package org.rut.util.algorithm; $jDp ^ -
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import org.rut.util.algorithm.support.BubbleSort; !7:~"kk
import org.rut.util.algorithm.support.HeapSort; pFu3FUO*;
import org.rut.util.algorithm.support.ImprovedMergeSort; mxpncM=q
import org.rut.util.algorithm.support.ImprovedQuickSort; ZA;wv+hF=
import org.rut.util.algorithm.support.InsertSort; `GG PkTN
import org.rut.util.algorithm.support.MergeSort; O*<,lq 0K
import org.rut.util.algorithm.support.QuickSort; Tk'YpL#U
import org.rut.util.algorithm.support.SelectionSort; p^LUyLG`
import org.rut.util.algorithm.support.ShellSort; CPI7&jqu
CVi3nS5Yl
/** _~M*XJ] `
* @author treeroot <*Kj7o{Qn
* @since 2006-2-2 UeVRd
* @version 1.0 ZW}0{8Dk
*/ *lN>RWbM%
public class SortUtil { &k5 Z|d|
public final static int INSERT = 1; >^@/Ba$h
public final static int BUBBLE = 2; XK)qDg
public final static int SELECTION = 3; _Z:WgO].
public final static int SHELL = 4; <%(nF+rQA"
public final static int QUICK = 5; /lQGFLZL
public final static int IMPROVED_QUICK = 6; /^E2BRI
public final static int MERGE = 7; (aX5VB**
public final static int IMPROVED_MERGE = 8; w*})ZYIUT
public final static int HEAP = 9; 1or4s{bmo
i%+p\eeq*
public static void sort(int[] data) { %} _{_Z
sort(data, IMPROVED_QUICK); B6gSt3w.
} /=x) 9J
private static String[] name={ +3 2"vq)_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o)P'H"Ki
}; xQ `>\f
O)'Bx=S4Ke
private static Sort[] impl=new Sort[]{ F3\'WQh
new InsertSort(), Tsez&R$k
new BubbleSort(), @l0#C5(:
new SelectionSort(), k,xY\r$
new ShellSort(), f$x\~y<[
new QuickSort(), d#N<t`
new ImprovedQuickSort(), a X>bC-
new MergeSort(), s|U=_,.
new ImprovedMergeSort(), 21$YZlhJ
new HeapSort() Uk u~"OGC
}; @<ba+z>"~4
4VjP:>*p
public static String toString(int algorithm){ g4WN+y`
return name[algorithm-1]; i6)$pARp
} a_YE[6
~+{OSx<S
public static void sort(int[] data, int algorithm) { .0:twj
impl[algorithm-1].sort(data); We#u-#k_O
} [N}:Di,S
)5r*2I
public static interface Sort { @N`) Z3P+
public void sort(int[] data); Y"&&=M#
} swvn*xr
Z8P{Cr~U9
public static void swap(int[] data, int i, int j) { T`f6`1x
int temp = data; nV-A0"z_&
data = data[j]; W6t"n_%?"
data[j] = temp; >!|Hns
} wRL=9/5(8
} 0/d+26lR