[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; /&\V6=jA1
} I~6(>Z{
int i1=l; !4<D^eh
int i2=mid+1; %7-(c
for(int cur=l;cur<=r;cur++){ PZru:.Mh
if(i1==mid+1) 2ZV; GS#
data[cur]=temp[i2++]; O`Qke Z}
else if(i2>r) iOIq2&sV
data[cur]=temp[i1++]; P0; y
else if(temp[i1] data[cur]=temp[i1++]; tBkgn3w
else LK4NNZf7
data[cur]=temp[i2++]; Kn3Xn`P?
} 6|'7Mr~\
} IAzFwlO9
~-NSIV:f
} w:nH_x#C4
U]+IP;YS
改进后的归并排序: Ohgu*5!o
oMemF3M
package org.rut.util.algorithm.support; UhDf6A`]
l?IeZisX
import org.rut.util.algorithm.SortUtil; 94O\M RQ*
Z,AY<[/C
/** lO|LvJyx
* @author treeroot y+Nw>\|S
* @since 2006-2-2 Q}^Ip7T
* @version 1.0 1p5'.~J+Q
*/ \:F$7 *Ne
public class ImprovedMergeSort implements SortUtil.Sort { fe<7D\Sp@
Y=|20Y\K
private static final int THRESHOLD = 10; 2%fzRXhu%
F,)+9/S&
/* [z\baL|
* (non-Javadoc) &,8Qe;
* WI| -pzg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,_H H8[&
*/ ah<p_qe9|
public void sort(int[] data) { %m/lPL
int[] temp=new int[data.length]; BUwL?
mergeSort(data,temp,0,data.length-1); \z6UWZ
} <uBRLe`)
%'g)MK!e
private void mergeSort(int[] data, int[] temp, int l, int r) { %Iflf]l
int i, j, k; "oiN8#Hf
int mid = (l + r) / 2; _vb'3~'S
if (l == r) ?fP3R':s
return; Y|b,pC|,
if ((mid - l) >= THRESHOLD) ^ )"Il
mergeSort(data, temp, l, mid); CG@Fn\J
else 49>b]f,Vc
insertSort(data, l, mid - l + 1); 4a&8G
if ((r - mid) > THRESHOLD) Jlb{1B$7
mergeSort(data, temp, mid + 1, r); EKcPJ\7
else b{-"GqMO
insertSort(data, mid + 1, r - mid); !oXFDC3k
{hOS0).(w7
for (i = l; i <= mid; i++) { (Nz`w
temp = data; "CC"J(&a
} 8pA<1H%
for (j = 1; j <= r - mid; j++) { ks phO-
temp[r - j + 1] = data[j + mid]; :qqG%RB
} nu+^D$ait
int a = temp[l]; 3rFku"zT$
int b = temp[r]; |xZu?)M4
for (i = l, j = r, k = l; k <= r; k++) { 'MX|=K!C
if (a < b) { !%}n9vr!}\
data[k] = temp[i++]; )M"NMUuU"
a = temp; e<{d{
} else { V,VL?J\
data[k] = temp[j--]; ?(R#
b = temp[j]; &qPezyt
} A0@,^|]
} FXY>o>K%h
} 8<0P Ssx
P 0+@,kM
/** <]%6x[
* @param data T#!% Uzz
* @param l U5-8It2OR
* @param i .]KC*2
*/ f^hJAZ
private void insertSort(int[] data, int start, int len) { z]hRc8g}d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?mC'ZYQI
} kmTYRl )j
} gfN=0Xj4
} \kUQe-:he
} _IOUhMo
3^&`E}r
堆排序： k ?6d\Q
SXl~lYUL
package org.rut.util.algorithm.support; (O(TFE5^
M0C)SU5"
import org.rut.util.algorithm.SortUtil; _2`b$/)-
-Wmb M]Z
/** a%HNz_ro
* @author treeroot b"#S92R+
* @since 2006-2-2 *szs"mQ/
* @version 1.0 SX'NFdY
*/ h*JN0O<b
public class HeapSort implements SortUtil.Sort{ W3Ee3
S9$,.aq
/* (non-Javadoc) am3JzH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #E=8kbD7
*/ i" u|119
public void sort(int[] data) { i Pr(X
MaxHeap h=new MaxHeap(); VfJ{);
h.init(data); A9SL|9Q
for(int i=0;i h.remove(); n2-+.9cY
System.arraycopy(h.queue,1,data,0,data.length); 1;kMbl]
} 8;"%x|iBoL
9?hF<}1XH}
private static class MaxHeap{ tvVf)bbz
H!}L(gjEG
void init(int[] data){ z}-R^"40
this.queue=new int[data.length+1]; D}}?{pe
for(int i=0;i queue[++size]=data; L.;x=w
fixUp(size); `$JZJ!,A
} k0PwAt)65
} "v wLj:
$ eL-fg
private int size=0; 1TA!9cz0Z
G8w@C
private int[] queue; mYJ8O$
wTR?8$
public int get() { I*o6Bn |D
return queue[1]; H'k~;
} Jpp-3i.F#
UJp'v_hN
public void remove() { MD1X1,fk
SortUtil.swap(queue,1,size--); K\B!tk
fixDown(1); :O@n6%pSL
} (JdheCq!x
file://fixdown y_W?7S
private void fixDown(int k) { @VOegf+N
int j; ^J^~5q8
while ((j = k << 1) <= size) { Glw|*{$
if (j < size %26amp;%26amp; queue[j] j++; MW+DqT.h
if (queue[k]>queue[j]) file://不用交换 YZOwr72VL
break; hTZ6@i/pS
SortUtil.swap(queue,j,k); )$f?v22
k = j; *UW 8|\;
} BH^*K/^
} #k>n5cR@0
private void fixUp(int k) { rmvrv.$3
while (k > 1) { ' ZTRl+
int j = k >> 1; 0^J%&1aIc
if (queue[j]>queue[k]) 4%qmwt*p
break; X1oR
SortUtil.swap(queue,j,k); s8]%L4lvu
k = j; H@zv-{}T8
} (ESFR0
} mP15PZ
$(0<T<\
} n;xzjq-
rttKj{7E
} (dNF)(wn
1z2v[S&pk
SortUtil： IN1n^f$:
#2Q%sE?
package org.rut.util.algorithm; %j17QD8
|SMigSu r`
import org.rut.util.algorithm.support.BubbleSort; #>_fYjT
import org.rut.util.algorithm.support.HeapSort; }2BNy9q@
import org.rut.util.algorithm.support.ImprovedMergeSort; d@*dbECG
import org.rut.util.algorithm.support.ImprovedQuickSort; +N,Fq/x
import org.rut.util.algorithm.support.InsertSort; ? B|i
import org.rut.util.algorithm.support.MergeSort; im:[ViR {
import org.rut.util.algorithm.support.QuickSort; 9%ct
import org.rut.util.algorithm.support.SelectionSort; m^ar:mK@
import org.rut.util.algorithm.support.ShellSort; Xu_1r8-|=b
r:0RvWif
/** Dvz 6 E
* @author treeroot Jr2>D=
* @since 2006-2-2 @g#| srYD
* @version 1.0 "tk1W>liIN
*/ U$a)lcJd
public class SortUtil { ;{iTSsb
public final static int INSERT = 1; uW[AnQ1w
public final static int BUBBLE = 2; Z9% u,Cb
public final static int SELECTION = 3; Pk5\v0vkg
public final static int SHELL = 4; >yVrIko
public final static int QUICK = 5; leizjL\P
public final static int IMPROVED_QUICK = 6; y<`:I|y
public final static int MERGE = 7; $ <[r3
public final static int IMPROVED_MERGE = 8; ;*Y+.?>a
public final static int HEAP = 9; t*BCpC}
Qqb%^}Xx'u
public static void sort(int[] data) { *Y53bZ
sort(data, IMPROVED_QUICK); 3~WI3ZIR
} @*op5qVw
private static String[] name={ &2@Rc?!6_P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E:\#Ur2
}; 'X&"(M
A~?)g!tS<
private static Sort[] impl=new Sort[]{ d@Bd*iI<
new InsertSort(), ~k 6V?z}
new BubbleSort(), Ug gg!zA
new SelectionSort(), id`9,IJx
new ShellSort(), 5 8U[IGs(
new QuickSort(), PDgZb
new ImprovedQuickSort(), O6-';H:I]L
new MergeSort(), :u@ w;
new ImprovedMergeSort(), v,rKuvc'
new HeapSort() /!"sPtIh
}; yQu/({D
98zJ?NaD&
public static String toString(int algorithm){ ]4*E:
return name[algorithm-1]; e*D,2>o
} \Z~@/OVc
Pa|*Jcr
public static void sort(int[] data, int algorithm) { 5?j#
impl[algorithm-1].sort(data); Y3)*MqZlF
} Lq@uwiq!
), VF]
public static interface Sort { 0H'G./8
public void sort(int[] data); !14v Ovj4{
} cZ.p
@v/Ae_q!
public static void swap(int[] data, int i, int j) { 0Y~5|OXJ
int temp = data; pwVGe|h%,
data = data[j]; J<cY'?D
data[j] = temp; .k!2{A
} G [yI[7=d
} /W}"/W9