[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; jD`d#R
} *r$+&8V\n
int i1=l; _!?Hu/zo
int i2=mid+1; Hw-Z
for(int cur=l;cur<=r;cur++){ f4guz
if(i1==mid+1) kr9gK~
data[cur]=temp[i2++]; `UQf2o0%3w
else if(i2>r) pmFk50`
data[cur]=temp[i1++]; +ke1Cn'[
else if(temp[i1] data[cur]=temp[i1++]; *mMEl]+
else =pznu+,
data[cur]=temp[i2++]; MiRdX#+Y
} x"CZ]p&m
} o)[2@fRC(
}oKG}wgY
} 3t0[^cY8=z
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改进后的归并排序: zBP>jM(8
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package org.rut.util.algorithm.support; QlHd,w
6"D/xV3Z
import org.rut.util.algorithm.SortUtil; 3^Q]j^e4Ny
^+1#[E
/** Q26qNn bK
* @author treeroot LT,?$I
* @since 2006-2-2 F1Hh7 F
* @version 1.0 N?m0USu*
*/ b77>$[xB
public class ImprovedMergeSort implements SortUtil.Sort { G_dsrpI=N
wprX!)w<i
private static final int THRESHOLD = 10; v (2GX
DS%\SrC
/* /De^
* (non-Javadoc) @5[kcU>
* ]Y| 9?9d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f5GdZ_
*/ >Z;jY*
public void sort(int[] data) { *\o/q[
int[] temp=new int[data.length]; 1<h>B:
mergeSort(data,temp,0,data.length-1); Vm|Y$C
} {" 4e+y
v*qQ?S
private void mergeSort(int[] data, int[] temp, int l, int r) { q;:6_Qr
int i, j, k; B:\Uw|Mf
int mid = (l + r) / 2; zP;cTF(C
if (l == r) R i'L
return; $DP&a1'g
if ((mid - l) >= THRESHOLD) Na\WZSu'"
mergeSort(data, temp, l, mid); atW'
else _zu?.I0^
insertSort(data, l, mid - l + 1); ~-83Q5/[
if ((r - mid) > THRESHOLD) //&j<vus
mergeSort(data, temp, mid + 1, r); N7s'6(`=X
else x+@&(NMP5
insertSort(data, mid + 1, r - mid); :~ A%#
z 8*8OWM
for (i = l; i <= mid; i++) { KnNh9^4"\2
temp = data; ZK'-U,Y.H7
} 0iZGPe~
for (j = 1; j <= r - mid; j++) { ~kCwJ<E
temp[r - j + 1] = data[j + mid]; & ``d
} l6u&5[C
int a = temp[l]; _NcYI
int b = temp[r]; oiH|uIsqR
for (i = l, j = r, k = l; k <= r; k++) { #DjCzz\
if (a < b) { /S\cU`ZVe
data[k] = temp[i++]; $j5,%\4<
a = temp; "aF8l<1xn
} else { cM_Fp
data[k] = temp[j--]; S',9g4(5
b = temp[j]; "W#t;;9Wz
} aRc'
} )){xlFA}
} H\GkW6
w~@-9<^K]v
/** (.Lrmf@hI7
* @param data lZQ/W:OE
* @param l $oLU; q%
* @param i pU!o7>p
*/ IAOcKQ3
private void insertSort(int[] data, int start, int len) { pAu72O?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M- 0i7%
} )=Q)BN[
} +} mk>e/
} C`'W#xnp1
} 0q9>6?=i
|fHB[ W#
堆排序： >bUj*#<
- /c7nF
package org.rut.util.algorithm.support; %k0EpJE%
dS`Bk6Y
import org.rut.util.algorithm.SortUtil; X[W]=yJJ
{$M;H+Foh
/** )n=ARDd^e
* @author treeroot ?_`0G/xl
* @since 2006-2-2 111D3
* @version 1.0 $A}QY5`+~S
*/ !eJCM`cp
public class HeapSort implements SortUtil.Sort{ ,5|d3dJS
m/`IGT5J
/* (non-Javadoc) c {I"R8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +3,|"g::
*/ #~Q8M*~@
public void sort(int[] data) { WjMS5^ _
MaxHeap h=new MaxHeap(); OSzjK7:
h.init(data); 2BzqY`O
for(int i=0;i h.remove(); $cVi;2$p
System.arraycopy(h.queue,1,data,0,data.length); @1R8-aa-r
} w.N,)]h
}xlKonk
private static class MaxHeap{ +@VYs*&&
y5m!*=`l`
void init(int[] data){ H0*5_OJ!i
this.queue=new int[data.length+1]; x"(9II*
for(int i=0;i queue[++size]=data; ^t[HoFRa
fixUp(size); %q_Miu@
} 9YF$CXonE=
} s T3p>8n
#3kXmeyrD
private int size=0; :[M[(
%McO6.M@
private int[] queue; 4(vyp.f
0p fnV%
public int get() { cbKL$|
return queue[1]; uG>nV
} ^t'3rft
K%}}fw2RMN
public void remove() { Y(GN4@`S
SortUtil.swap(queue,1,size--); |xr32gs
fixDown(1); i9UI,b%X
} ' eO/PnYW
file://fixdown CsSp=(
private void fixDown(int k) { -cNx1et
int j; gY`Nr!O
while ((j = k << 1) <= size) { U '[?9/T
if (j < size %26amp;%26amp; queue[j] j++; 1h"_[`L'
if (queue[k]>queue[j]) file://不用交换 #/j={*-
break; Fu8 7fVi/\
SortUtil.swap(queue,j,k); }gsO&g"8
k = j; "uu)2Xe
} 6kvV
} X9~m8c){z
private void fixUp(int k) { -O&"|
while (k > 1) { FQf#*
int j = k >> 1; Xy#VQ{!
if (queue[j]>queue[k]) JZ`L%
break; u9![6$R
SortUtil.swap(queue,j,k); Y~oT)wTU
k = j; Rq7p29w
} W81o"TR|pt
} .R5/8VuHF
NcL =zo<
} lVeH+"M?
~SVQ;U)-
} =LZ>su
2/tb6' =
SortUtil： 2H&{1f\Bf
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package org.rut.util.algorithm; |*Ot/TvG
Ugi5OKdj7)
import org.rut.util.algorithm.support.BubbleSort; ~HP LV
import org.rut.util.algorithm.support.HeapSort; @)sc6 *lnW
import org.rut.util.algorithm.support.ImprovedMergeSort; $ u2Cd4
import org.rut.util.algorithm.support.ImprovedQuickSort; _1JmjIH)M
import org.rut.util.algorithm.support.InsertSort; PI7IBI
import org.rut.util.algorithm.support.MergeSort; 6tOi^+qN
import org.rut.util.algorithm.support.QuickSort; '\*A"8;h
import org.rut.util.algorithm.support.SelectionSort; k)E;(
import org.rut.util.algorithm.support.ShellSort; 8wiA
fkW(Dt,
/** B5Va%?Wg?H
* @author treeroot Kp_jy.e7&
* @since 2006-2-2 }(=ml7)v
* @version 1.0 GqjO>v fy
*/ ZBj6KqfST%
public class SortUtil { Js}tZ\+P75
public final static int INSERT = 1; 0|2%# E
public final static int BUBBLE = 2; + x_wYv
public final static int SELECTION = 3; y'rN5J:l
public final static int SHELL = 4; L_*L`!vQA"
public final static int QUICK = 5; \o9@[t>&2
public final static int IMPROVED_QUICK = 6; 6H;kJHn
public final static int MERGE = 7; $T*KaX\{B
public final static int IMPROVED_MERGE = 8; E:Y:X~vy
public final static int HEAP = 9; LrM}?9'
Y}/jR6hK
public static void sort(int[] data) { Q=.g1$LP
sort(data, IMPROVED_QUICK); * NMQ
} z\[(g
private static String[] name={ `2x34
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hZ#\t
}; -]&<Sr-
0=m&^Jpp
private static Sort[] impl=new Sort[]{ fI[dhd6
new InsertSort(), A*Q[k 9B
new BubbleSort(), -HTL5
new SelectionSort(), zjoo{IH}
new ShellSort(), ,#%SK;1<
new QuickSort(), #5d8?n
new ImprovedQuickSort(), 5}SXYA}
new MergeSort(), &^ceOV0+
new ImprovedMergeSort(), =[(%n94
new HeapSort() A}eOR=E
}; f)tc4iV
,'-?:`hP'
public static String toString(int algorithm){ pU[K%@sC
return name[algorithm-1]; c+;S<g0
} jmPp-}tS7
S%V%!803!
public static void sort(int[] data, int algorithm) { nB}e1 /_y
impl[algorithm-1].sort(data); rHo6iJj
} )GCLK<,swu
Et0&E
public static interface Sort { y(a}IM3~
public void sort(int[] data); 9R:(^8P8
} VLd=" ~
%jgg59
public static void swap(int[] data, int i, int j) { Z>HNe9pr
int temp = data; `g8tq
data = data[j]; 3It8&x:
data[j] = temp; %f#\i#G<k
} Jh(mbD
} 2_Jb9:/X