[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; !l@IG C
} 2(LS<HqP[
int i1=l; DM{7x77
int i2=mid+1; =0`"T!1
for(int cur=l;cur<=r;cur++){ ?)-*&1cv
if(i1==mid+1) _S/bwPj|~y
data[cur]=temp[i2++]; !Pt|Hk dr
else if(i2>r) gA~BhDS
data[cur]=temp[i1++]; Fs<kMT
else if(temp[i1] data[cur]=temp[i1++]; Bm"jf]
else k&ujr:)5Y5
data[cur]=temp[i2++]; !)ey~Suh
} Lie\3W
} z}yntY]n
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} m C_v!nL.
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改进后的归并排序: PX52a[wNDH
WZdA<<,:o
package org.rut.util.algorithm.support; f8_5.vlw
vLJ<_&6
import org.rut.util.algorithm.SortUtil; >Be PE(k
dgE|*1/0
/** k uU,7<o
* @author treeroot R*/%+
* @since 2006-2-2 oHB51< }
* @version 1.0 ;2@MPx
*/ v-Ggf0RF
public class ImprovedMergeSort implements SortUtil.Sort { x "]%q^x
8},!t\j#]
private static final int THRESHOLD = 10; ["Ep.7=SU
k# ZO4
/* V/$qD
* (non-Javadoc) A5z`_b4f
* E {4/$}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kM*f9x
*/ FgrOZI;_
public void sort(int[] data) { k4'rDJfB
int[] temp=new int[data.length]; .1.n{4z>:
mergeSort(data,temp,0,data.length-1); v$p<6^kJ
} \gki!!HQ
Xgn^)+V:
private void mergeSort(int[] data, int[] temp, int l, int r) { \A*#a9"
int i, j, k; ueDG1)
int mid = (l + r) / 2; fxXZ^#2wX
if (l == r) 6Y)'p .+g
return; }I}RqD:`
if ((mid - l) >= THRESHOLD) bk}.^m!
mergeSort(data, temp, l, mid); Dsw(ti`@
else [mJcc
insertSort(data, l, mid - l + 1); ~A}"s-Kq5
if ((r - mid) > THRESHOLD) WM*[+8h
mergeSort(data, temp, mid + 1, r); `]_#_
else Q*ZqY
insertSort(data, mid + 1, r - mid); (ST/>")L
(WCpaC
for (i = l; i <= mid; i++) { mNc(
temp = data; 8GN0487H
} HtgVD~[]
for (j = 1; j <= r - mid; j++) { hdQ[=PH)
temp[r - j + 1] = data[j + mid]; ~4.Tq{
} pi q%b]
int a = temp[l]; 79n,bb5
int b = temp[r]; ]BP"$rs
for (i = l, j = r, k = l; k <= r; k++) { s7tNAj bgD
if (a < b) { iSUn}%YFz!
data[k] = temp[i++]; ba1zu|@w
a = temp; vo-n9Bj
} else { ]t\fw'
data[k] = temp[j--]; i{I'+%~R
b = temp[j]; 1>c`c]s3
} 2BS2$#c>
} ;VSHXU'H
} UN'hnqC
cAM1\3HWT"
/** D06'"
* @param data T#DJQ"$
* @param l xop9*Z$
* @param i Nj1vB;4Nx
*/ q@~N?$>
private void insertSort(int[] data, int start, int len) { z2i?7)(?;A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8c3`IIzAS
} "pa5+N&2-
} #*BcO-N
} )a.w4dH
} j/TsHJ=
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堆排序： dB ?+-aE
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package org.rut.util.algorithm.support; sg;Gk/]
5u'"m<4
import org.rut.util.algorithm.SortUtil; ~e@QJ=r
l}j5EWe
/** H^_[nL
* @author treeroot V.Dqbv
* @since 2006-2-2 (NyS2`
* @version 1.0 s4Lqam!
*/ )?^0<l#s
public class HeapSort implements SortUtil.Sort{ j+\I4oFN
rBye%rQRq
/* (non-Javadoc) 'b]GcAL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _Ft4F`pM
*/ R!0O[i
public void sort(int[] data) { 1Y$ gt
MaxHeap h=new MaxHeap(); i64a]=
h.init(data); vQ2kL`@
for(int i=0;i h.remove(); ~>3$Id:
System.arraycopy(h.queue,1,data,0,data.length); B4bC6$Lg
} t%Vc1H2}
><}FyK4C
private static class MaxHeap{ _Isju S
cod__.
void init(int[] data){ Z@>hN%{d+g
this.queue=new int[data.length+1]; h-+9Bv]
for(int i=0;i queue[++size]=data; 1q0DOf]!T
fixUp(size); |&`NB|
} {Lwgj7|~
} coT|t T
w{f!t8C*s
private int size=0; N`1:U 4}
|&eZ[Sy(=l
private int[] queue; xQ\/6|
oXRmnt
public int get() { S9S8T+
return queue[1]; ~UA-GWb
} ,#hS#?t
Tjma'3H*T0
public void remove() { X<dQq`kZ
SortUtil.swap(queue,1,size--); rCR?]1*Z
fixDown(1); ,X25-OFZ
} `9E:V=
file://fixdown fDt#<f 4;
private void fixDown(int k) { }R4%%)j(Vj
int j; Pz7{dQqjk#
while ((j = k << 1) <= size) { 2a8ZU{wjn
if (j < size %26amp;%26amp; queue[j] j++; wi^zXcVj
if (queue[k]>queue[j]) file://不用交换 Aw9se"d
break; [[2Zcz:
SortUtil.swap(queue,j,k); l5_RG,O0A
k = j; k,wr6>'Vt
} 4Xi _[ Xf
} A:PQIcR;V
private void fixUp(int k) { 4scY8(1
while (k > 1) { f1w&D ]|S+
int j = k >> 1; ;U=IbK*
if (queue[j]>queue[k]) Oya:{d&=
break; WP[h@#7<
SortUtil.swap(queue,j,k); KU#w%
k = j; d/5i4g[q
} Xu\FcQ{
} |YCGWJaci
{`?C5<r
} Qz)1wf'y
T n.Cj5
} V'?bZcRr~
%\Dvng6$
SortUtil： *W,tq(%tQ
nAIV]9RAZ%
package org.rut.util.algorithm; $I*ye+a*{q
lZ]x #v
import org.rut.util.algorithm.support.BubbleSort; 9n4vuBgv
import org.rut.util.algorithm.support.HeapSort; JrlDTNJj'
import org.rut.util.algorithm.support.ImprovedMergeSort; Y~z3fd
import org.rut.util.algorithm.support.ImprovedQuickSort; %+Hhe]J ld
import org.rut.util.algorithm.support.InsertSort; !SRElb A;i
import org.rut.util.algorithm.support.MergeSort; $>Md]/I8
import org.rut.util.algorithm.support.QuickSort; WqQAt{W/<
import org.rut.util.algorithm.support.SelectionSort; ^ [FK<9
import org.rut.util.algorithm.support.ShellSort; Sl,X*[HGd
/g$cQ=c
/** vEQw`OC
* @author treeroot fLkZ'~e!
* @since 2006-2-2 .}IxZM[}D
* @version 1.0 {l/j?1Dxq
*/ X*f#S:kiNU
public class SortUtil { ,liFo.kT8%
public final static int INSERT = 1; K+2k}Hx6J
public final static int BUBBLE = 2; jw63sn
public final static int SELECTION = 3; >f)/z$ qn
public final static int SHELL = 4; !J#oN+AR
public final static int QUICK = 5; c%|K x
public final static int IMPROVED_QUICK = 6; _cPGS=Ew
public final static int MERGE = 7; : L}Fm2^
public final static int IMPROVED_MERGE = 8; JF{yhx,+p
public final static int HEAP = 9; $ZnLYuGb
n1 k2<BU4b
public static void sort(int[] data) { /mS|Byx
sort(data, IMPROVED_QUICK); %LI[+#QE
} poLzgd
private static String[] name={ +=.>9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A'A5.\UN
}; {jyI7r#X
bUv}({
private static Sort[] impl=new Sort[]{ :mP%qG9U
new InsertSort(), )w.+( v(
new BubbleSort(), ~nQ=iB
new SelectionSort(), g2?kC^=z=
new ShellSort(), ~!V5Ug_2
new QuickSort(), j:|um&`)
new ImprovedQuickSort(), (L`7-6e(Ab
new MergeSort(), C:r@)Mhq
new ImprovedMergeSort(), ,<Ag&*YE4
new HeapSort() pr~%%fCh
}; V]E#N
^Om0~)"q
public static String toString(int algorithm){ a7$]" T 7
return name[algorithm-1]; Go^a~Sf$
} 8|]r>L$Wk
^nO0/nqz]
public static void sort(int[] data, int algorithm) { ShP&ss
impl[algorithm-1].sort(data); qu8!fFQjYL
} t(~V:+W9
\@\r`=WgB
public static interface Sort { ~wejy3|@0
public void sort(int[] data); W;Pdbf"
} d+caGpaR
f`;y "ba
public static void swap(int[] data, int i, int j) { 3t4i2]
int temp = data; ,0hk)Vvr3
data = data[j]; yr;~M{{4
data[j] = temp; %w$\v"^_Y
} w}20l F
} {th=MldJ?