[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; {(U?)4@
} ~'m GGH2
int i1=l; a)^f`s^aa
int i2=mid+1; B4bC6$Lg
for(int cur=l;cur<=r;cur++){ *>h"}e41
if(i1==mid+1) U=\ZeYK.
data[cur]=temp[i2++]; x[U/ 8#f&
else if(i2>r) "X4OUk
data[cur]=temp[i1++]; H{ p
else if(temp[i1] data[cur]=temp[i1++]; ;| ##~Y.9
else /)ps_gM
data[cur]=temp[i2++]; R(@B4M2
} ,-myR1}
} ^s\(2lB\F
kzny4v[y
} ?wt%e;
$YSAD\a<
改进后的归并排序: )WF]v"t
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package org.rut.util.algorithm.support; cq>{
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import org.rut.util.algorithm.SortUtil; N%v}$58Z
mjO4GpG3
/** .xS3,O_[
* @author treeroot U']DB h
* @since 2006-2-2 |&eZ[Sy(=l
* @version 1.0 8VQJUwf;
*/ Gu}|CFL\
public class ImprovedMergeSort implements SortUtil.Sort { /.9j$iK#
Y*/:IYr`
private static final int THRESHOLD = 10; 3?iRf6;n
E;.<'t>
/* ~KHGh29
* (non-Javadoc) /kqW
* OJPxV~y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /)sA{q 4
*/ mnZ/rb
public void sort(int[] data) { ~B;kFdcVXn
int[] temp=new int[data.length]; rCR?]1*Z
mergeSort(data,temp,0,data.length-1); (Gr8JpV
} O]>9\!0{
:0|]cHm
private void mergeSort(int[] data, int[] temp, int l, int r) { -CtLL_I
int i, j, k; ,l^; ZE
int mid = (l + r) / 2; _TfG-Ae
if (l == r) |=L~>G
return; ^2%_AP0=
if ((mid - l) >= THRESHOLD) :IlRn`9X`
mergeSort(data, temp, l, mid); B{$4s8XU
else j&,,~AZm
insertSort(data, l, mid - l + 1); A;7p
if ((r - mid) > THRESHOLD) 7nM]E_
mergeSort(data, temp, mid + 1, r); :@x24wN/
else N7Vv"o
insertSort(data, mid + 1, r - mid); l5_RG,O0A
! 7A _UA8
for (i = l; i <= mid; i++) { )#n0~7 &
temp = data; E/2kX3}
} O32p8AxEz
for (j = 1; j <= r - mid; j++) { 'Vq <;.A
temp[r - j + 1] = data[j + mid]; Dg3Sn|!f
} RAYDl=}
int a = temp[l]; f1w&D ]|S+
int b = temp[r]; iU"jV*P]
for (i = l, j = r, k = l; k <= r; k++) { d2`m0U
if (a < b) { Aq674
data[k] = temp[i++]; K>iM6Uv
a = temp; H&\[iZ|-N
} else { 1Z%^U ?
data[k] = temp[j--]; 6$$4!R-
b = temp[j]; c<-F_+[
} 11t+ a,fM
} qPqpRi
} Z^ynw8k"
)d5Hv2/0
/** Lf0Y|^!S_u
* @param data Z BjyQ4h
* @param l hr3RC+ y
* @param i 2f>G
*/ %\Dvng6$
private void insertSort(int[] data, int start, int len) { Gu[G_^>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lz=$Dz
} LA &W@
} \) DJo
} )7!q>^S{B
} VqGmZ|+8
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堆排序： ~Sy/q]4ys*
5-'jYp/
package org.rut.util.algorithm.support; P`r@<cgb=
#tX\m;
import org.rut.util.algorithm.SortUtil; =v^LShD2^
%+Hhe]J ld
/** c6/+Ye =h
* @author treeroot Age
* @since 2006-2-2 XTboFrf
* @version 1.0 E_sKDybj
*/ 7|Z=#3INw
public class HeapSort implements SortUtil.Sort{ mp]}-bR)
\AFoxi2h
/* (non-Javadoc) Mj&`Y gW5a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D>Ij
*/ d&[Ct0!++u
public void sort(int[] data) { n^vL9n_N
MaxHeap h=new MaxHeap(); S:!gj2q9|
h.init(data); c#o(y6
for(int i=0;i h.remove(); %c+`8 wj
System.arraycopy(h.queue,1,data,0,data.length); 12l-NWXf
} C1w~z4Qp
uP|Py.+
private static class MaxHeap{ ,36AR|IO)
|,!]]YO.V
void init(int[] data){ tFlLKziU
this.queue=new int[data.length+1]; u /PaXQ
for(int i=0;i queue[++size]=data; cHqT1EY
fixUp(size); p5F=?*[}
} eh4`a<gC
} \"r84@<
D1w;cV7/d
private int size=0; lO^Ly27
}/)vOUcEd
private int[] queue; 2stBW5v3
((KNOa5
public int get() { <zd_-Ysn
return queue[1]; abog\0
} %#5\^4$z|N
X}"Ic@8
public void remove() { D*7JE
SortUtil.swap(queue,1,size--); Y)~Y;;/G
fixDown(1); Y:o\qr!Y
} %DyukUJ
file://fixdown Gg'sgn
private void fixDown(int k) { 4)- ?1?)
int j; Vyy;mEBg
while ((j = k << 1) <= size) { KmF"Ccc
if (j < size %26amp;%26amp; queue[j] j++; ^eF%4DUC;
if (queue[k]>queue[j]) file://不用交换 bUv}({
break; yg}zK>j^vC
SortUtil.swap(queue,j,k); pF0sXvWGG
k = j; Q=B>Q
} 4Js2/s
} ;/-v4
private void fixUp(int k) { g2?kC^=z=
while (k > 1) { #>O!N
int j = k >> 1; 2pr#qh8
if (queue[j]>queue[k]) 7Iz%Jty
break; d7,ZpHt
SortUtil.swap(queue,j,k); Hlh`d N
k = j; (RXOv"''=
} ~7CQw^"R@
} V$ 8go#5
P:lmQHls+
} &Tc:WD
1co;U
} R7'6#2y
x}^:Bs+j
SortUtil： IBP3
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package org.rut.util.algorithm; &#[w*t(A
s&Bk@a8
import org.rut.util.algorithm.support.BubbleSort; @=i-*U
import org.rut.util.algorithm.support.HeapSort; N@qP}/}8
import org.rut.util.algorithm.support.ImprovedMergeSort; <@F.qMl
import org.rut.util.algorithm.support.ImprovedQuickSort; bQ%6z}r
import org.rut.util.algorithm.support.InsertSort; ig-V^P
import org.rut.util.algorithm.support.MergeSort; `(- nSQ
import org.rut.util.algorithm.support.QuickSort; Uz4!O
import org.rut.util.algorithm.support.SelectionSort; ;`")3~M3*
import org.rut.util.algorithm.support.ShellSort; u& 4i=K'x8
vJ +sdG
/** .Iu8bN(L`
* @author treeroot ~mSW.jy}=-
* @since 2006-2-2 n'?AZ4&z
* @version 1.0 j\I{pW-
*/ mB\)Q J.%
public class SortUtil { QD8.C=2R
public final static int INSERT = 1; -RLY.@'d-M
public final static int BUBBLE = 2; %w$\v"^_Y
public final static int SELECTION = 3; D,3Kx ^
public final static int SHELL = 4; s0zN#'o]
public final static int QUICK = 5; E{wnhsl{
public final static int IMPROVED_QUICK = 6; sn!E$ls3O
public final static int MERGE = 7; Q1 t-Z;X
public final static int IMPROVED_MERGE = 8; kT@m*Etr{
public final static int HEAP = 9; DPWt=IFU
l1M %
public static void sort(int[] data) { AfAlDM'
sort(data, IMPROVED_QUICK); h0cdRi
} Vx Vpl@
private static String[] name={ (^{tu89ab
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '3i,^g0?t0
}; ]2_b_ok
_ww>u""B~
private static Sort[] impl=new Sort[]{ Za110oF
new InsertSort(), ~M c'~:{O
new BubbleSort(), ]NEr]sc-"F
new SelectionSort(), cD%_+@GaU
new ShellSort(), S|jE1v"L
new QuickSort(), L2sUh+'|
new ImprovedQuickSort(), `i2:@?Kl9
new MergeSort(), +UM%6Z=+
new ImprovedMergeSort(), $q|-9B
new HeapSort() yv;KKQ
}; mhNX05D
5V $H?MW>
public static String toString(int algorithm){ Yy 8?X9r.
return name[algorithm-1]; n%S%a>IQj
} >fq]c
sQ}E4Iq1#S
public static void sort(int[] data, int algorithm) { ;_K3/:
impl[algorithm-1].sort(data); XfYbWR
} MwuRxeRO-
mfW}^mu
public static interface Sort { q+Ec|Xd e
public void sort(int[] data); b)[2t^zG
} mG*ER^Y@D
ez-jVi-Fi
public static void swap(int[] data, int i, int j) { s+-V^{Ht
int temp = data; {i^F4A@=Z
data = data[j]; G`e!WvC
data[j] = temp; R<<U(.E
} Pf:;iXH?
} w paI}H#