[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; gMUCVKGf
} E% d3}@
int i1=l; pW1(1M)[%Z
int i2=mid+1; *PF=dx<8
for(int cur=l;cur<=r;cur++){ x5 ?>y{6D
if(i1==mid+1) d.t$VRO
data[cur]=temp[i2++]; ;)rXQm
else if(i2>r) *g!7PzJ'
data[cur]=temp[i1++]; !nt[J$.z^
else if(temp[i1] data[cur]=temp[i1++]; 40Hm+Ge
else i4H,Ggb
data[cur]=temp[i2++]; ,@0D_&JAl
} ^@OdY&5^
} J ` KyS
^Rc*X'Iz(!
} ~9DD=5\
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改进后的归并排序: -mY,nMDb
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package org.rut.util.algorithm.support; aYws{Vii
@t4OpU<'*b
import org.rut.util.algorithm.SortUtil; C9L_`[9DO
!i5~>p|4@
/** MyaJhA6c
* @author treeroot =U,mzY(
* @since 2006-2-2 yrQfPR
* @version 1.0 s0*@zn>h
*/ eq,`T;
public class ImprovedMergeSort implements SortUtil.Sort { O8)N`#1>+
#9CLIYJAd
private static final int THRESHOLD = 10; {W$K@vuV;?
(fcJp)D
/* -)Of\4kx
* (non-Javadoc) y{Vh?Z<E
* SmVL?wf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B<oBo&uA
*/ ^vha4<'-qG
public void sort(int[] data) { e]-%P(}Z
int[] temp=new int[data.length]; oUx%ra{
mergeSort(data,temp,0,data.length-1); 0Ait7`
} M*2 Nq=3
3H,?ZFFGz
private void mergeSort(int[] data, int[] temp, int l, int r) { Er@OmNT
int i, j, k; 66-G)+4
int mid = (l + r) / 2; R(p3*t&n
if (l == r) U6F1QLSLz
return; Cxra(!&
if ((mid - l) >= THRESHOLD) {.o@XP,.
mergeSort(data, temp, l, mid); 3{9d5p|\i
else }va>jfy
insertSort(data, l, mid - l + 1); yoG*c%3V?
if ((r - mid) > THRESHOLD) 4}F~h
mergeSort(data, temp, mid + 1, r); yZkS
else {3!E8~
insertSort(data, mid + 1, r - mid); t[o_!fmxZ
a6!|#rt
for (i = l; i <= mid; i++) { ,)ZI&BL5
temp = data; r1/9BTPKdJ
} JsHD3
for (j = 1; j <= r - mid; j++) { hO; XJyv
temp[r - j + 1] = data[j + mid]; &gsBbQ+qA
} p> g[: ~
int a = temp[l]; ~|( eh9
int b = temp[r]; FwUgMR*xq
for (i = l, j = r, k = l; k <= r; k++) { `T3B
if (a < b) { #*X\pjZ
data[k] = temp[i++]; Ticx]_+~T
a = temp; bW^C30m
} else { {BzE
data[k] = temp[j--]; wEC,Mbn
b = temp[j]; b)@rp
} uF+0nv+
} vKBijmE
} 3<HZ)w^B
4d\V=_);r
/** Ui.S)\B
* @param data Y&-% N
* @param l Uj)Wbe[)p0
* @param i ~3Y4_b5E
*/ c3.;o
private void insertSort(int[] data, int start, int len) { ?OS0.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a'(B}B=h
} u(i=-PN_<
} i!EAs`$o`
} {r'+icvLX
} X}H?*'-
U=PTn(2
堆排序： +`tk LvM
p0hE`!
package org.rut.util.algorithm.support; bE?X?[K
=YY 7V!
import org.rut.util.algorithm.SortUtil; -\n%K
%`*On~
/** quRTA"!E
* @author treeroot K/K|[=bl
* @since 2006-2-2 @Gt.J*!s/
* @version 1.0 psUT2
*/ \,pObWm
public class HeapSort implements SortUtil.Sort{ jl5&T{z
)Z)Gb~G
/* (non-Javadoc) Ub/ZzAwq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |-L7qZu%
*/ @qEUp7W.?
public void sort(int[] data) { rn/~W[
MaxHeap h=new MaxHeap(); .3&(Y
h.init(data); ")<5VtV
for(int i=0;i h.remove(); /36gf
System.arraycopy(h.queue,1,data,0,data.length); %j.n^7i]^:
} I-#7Oq:Np
)D ~ 5
private static class MaxHeap{ K&eT*JW>
aYn5AP'PH
void init(int[] data){ U7Oa 13Qz
this.queue=new int[data.length+1]; 2T(7V[C%9
for(int i=0;i queue[++size]=data; fbD,\ rjT
fixUp(size); cQ |Q-S
} G.`},c;A-
} b!bg sd
voQJ!h1
private int size=0; #nw+U+qL
h'?v(k!
private int[] queue; <Zvvx
LI].*n/v
public int get() { `]^W#6l
return queue[1]; n'0r (
} .f"1(J8
[S1 b\f#
public void remove() { \*[DR R0
SortUtil.swap(queue,1,size--); huW,kk<]y
fixDown(1); `jSegG'
} p6V#!5Q
file://fixdown $JUkwsc
private void fixDown(int k) { ja9=b?]0,
int j; Wf^sl
while ((j = k << 1) <= size) { ?U+hse3e~
if (j < size %26amp;%26amp; queue[j] j++; 2vh }:A_
if (queue[k]>queue[j]) file://不用交换 r)#W`A1{A
break; hz*T"HJ]t
SortUtil.swap(queue,j,k); lv9Tq5C
k = j; JOJuGB-d
} fp*6Dv_
} T<"Bb[kH
private void fixUp(int k) { n}t9Nf_
while (k > 1) { F]D{[dBf
int j = k >> 1; *@p"
if (queue[j]>queue[k]) 8d_J9Ho
break; RMiDV^.u`
SortUtil.swap(queue,j,k); UI"UBZZ$
k = j; 2gh=0%|\gx
} |L`U2.hb
} <bb!BS&w
FSm.o?>
} 6aOyI;Ux
/QWXEL/M=
} Y[]I!Bc
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SortUtil： NU3TXO
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package org.rut.util.algorithm; g?Tev^D
/_})7I52
import org.rut.util.algorithm.support.BubbleSort; 0KTO)K
import org.rut.util.algorithm.support.HeapSort; @_?2iN?4Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ar#73f
import org.rut.util.algorithm.support.ImprovedQuickSort; <b.p/uA
import org.rut.util.algorithm.support.InsertSort; QkC*om'/!
import org.rut.util.algorithm.support.MergeSort; o$eCd{HuX
import org.rut.util.algorithm.support.QuickSort; ;mT}Q;F#
import org.rut.util.algorithm.support.SelectionSort; q/@+.q
import org.rut.util.algorithm.support.ShellSort; $}{[_2
Vjs'|%P7
/** {kw%7}!
* @author treeroot ~\<$H'
* @since 2006-2-2 _cE_\Ay
* @version 1.0 KE ?NQMU
*/ G%FZTA6a
public class SortUtil { Le:C8^
public final static int INSERT = 1; [^s;Ggi9
public final static int BUBBLE = 2; G;flj}z
public final static int SELECTION = 3; r{^43g?
public final static int SHELL = 4; CgmAxcK
public final static int QUICK = 5; D=mmBo
public final static int IMPROVED_QUICK = 6; pZ}B/j
public final static int MERGE = 7; n1{[CCee@
public final static int IMPROVED_MERGE = 8; i@.Tv.NZ
public final static int HEAP = 9; 4>i\r
=\|,hg)c
public static void sort(int[] data) { %~x?C4L8
sort(data, IMPROVED_QUICK); ah hl
} "~0`4lo:Xo
private static String[] name={ -fk;Qq3O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rR :ZTfJs"
}; tT>LOI_z
Jw8?o/1D@
private static Sort[] impl=new Sort[]{ }x\#ul)
new InsertSort(), eA86~M?<o
new BubbleSort(), Rx&O}>"E>l
new SelectionSort(), Er%&y
new ShellSort(), )ds]fvMW]N
new QuickSort(), r'j88)^
new ImprovedQuickSort(), 2H}y1bkW
new MergeSort(), Vj9X6u}{
new ImprovedMergeSort(), \cCH/
new HeapSort() (;;ji!i
}; ^h$*7u"^y
]t~.?)Ad+2
public static String toString(int algorithm){ tiE|%jOzt
return name[algorithm-1]; [U/h'A.j
} iuGwc086
x<M::")5!V
public static void sort(int[] data, int algorithm) { wpuK?fP
impl[algorithm-1].sort(data); 6ICW>#fI`
} \OtreYi
'mbLK#q
public static interface Sort { hdCd:6
public void sort(int[] data); O*GF/ R8B
} !IdVg$7
uR :EH.K
public static void swap(int[] data, int i, int j) { R%RxF=@
int temp = data; &TBFt;
data = data[j]; xws{"m,NX~
data[j] = temp; /nQuM05*Z
} 6"* <0
} OQ hQ!6