[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; Q4PXC$u
} KJ~pY<a?
int i1=l; X ,
int i2=mid+1; gn%"dfm
for(int cur=l;cur<=r;cur++){ A^7!+1*K+
if(i1==mid+1) W{h7+X]Y
data[cur]=temp[i2++]; RW)C<g
else if(i2>r) L; ~=(
data[cur]=temp[i1++]; 4jW{IGW
else if(temp[i1] data[cur]=temp[i1++]; *Tlv'E.M
else 72 6y/o
data[cur]=temp[i2++]; 8xX{y#
} 2P=;r:cx
} neBkwXF!
<*+MBF
} ivq4/Y]-X
pDLo`F}A
改进后的归并排序: @RP|?Xc{?
J\*d4I<(Rt
package org.rut.util.algorithm.support; |H4'*NP"
}VGiT~2$
import org.rut.util.algorithm.SortUtil; R[c_L=
;gyE5n-{
/** 34=0.{qn
* @author treeroot D4|_?O3|m
* @since 2006-2-2 WKf~K4BL>
* @version 1.0 -UVWs2W'$
*/ rUO{-R
public class ImprovedMergeSort implements SortUtil.Sort { 7,zARWB!?
On^#x]
private static final int THRESHOLD = 10; 8{YxUD
V("1\
/* _biJch
* (non-Javadoc) #L)rz u
* LcXMOT)s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'w2;oO
*/ &}cie"\L
public void sort(int[] data) { DbN'b(+
int[] temp=new int[data.length]; Q [{vU
mergeSort(data,temp,0,data.length-1); "->:6Oe2
} R;o_*
{E/TC%
private void mergeSort(int[] data, int[] temp, int l, int r) { kXr%73s
int i, j, k; bv/b<N@4?$
int mid = (l + r) / 2; wO#+8js
if (l == r) KB= z{g
return; ]YP?bP,:
if ((mid - l) >= THRESHOLD) n1Jz49[r
mergeSort(data, temp, l, mid); U6Ak"
else ThxrhQ q[+
insertSort(data, l, mid - l + 1); &; \v_5N6
if ((r - mid) > THRESHOLD) sfa'\6=O
mergeSort(data, temp, mid + 1, r); qpl5n'qHUc
else p2G8Qls
insertSort(data, mid + 1, r - mid); .D.Rn/
o1Ln7r.
for (i = l; i <= mid; i++) { zTLn*?
temp = data; Sg-xm+iSDt
} |BW,pT
for (j = 1; j <= r - mid; j++) { S2)S/ nf
temp[r - j + 1] = data[j + mid]; _LNPB$P
} 7;NV 1RV
int a = temp[l]; 2#3R]zIO
int b = temp[r]; y`\Mhnj
for (i = l, j = r, k = l; k <= r; k++) { :!$z1u8R
if (a < b) { ">3@<f>
data[k] = temp[i++]; +0Gep}&z.
a = temp; Kcl$|T
} else { #A;Z4jK
data[k] = temp[j--]; l'QR2r7&.
b = temp[j]; TeJ `sJ
} iC]lO
} w>uZ$/
} >{a,]q*
p( *3U[1
/** Q8?D}h
* @param data EcIQ20Z_-
* @param l \]xYV}(FO
* @param i gf?^yP ;V
*/ ;Oy>-Ij5P
private void insertSort(int[] data, int start, int len) { Oq6n.:8g"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T;@>O^
} ]'(7T#
} tHbPd.^
} 9eiBj
} l,wN@Nk
N_D+d4@
堆排序： 4-_lf(#i
P-[K*/bPw
package org.rut.util.algorithm.support; "\;wMR{
Bq@wS\W>b}
import org.rut.util.algorithm.SortUtil; _eV n#!|
x-&v|w'
/** 2p>SB/
* @author treeroot Y)}%SP>,
* @since 2006-2-2 +o]BjgG
* @version 1.0 Aw;vg/#~md
*/ 'V#ew\
public class HeapSort implements SortUtil.Sort{ N?0y<S ?!
C+XZDY(=Z
/* (non-Javadoc) 4rG 7\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .To:tN#
*/ <C;>$kX
public void sort(int[] data) { sdYj'e:N
MaxHeap h=new MaxHeap(); e oSM@Isu
h.init(data); |SKG4_wGe
for(int i=0;i h.remove(); z\>X[yNpA
System.arraycopy(h.queue,1,data,0,data.length); x9l0UD*+g
} mo[<4Uks
uz3pc;0LPY
private static class MaxHeap{ *Ne&SXg
c8tC3CrKp=
void init(int[] data){ h;qy5KS
this.queue=new int[data.length+1]; ^alZ\!B8
for(int i=0;i queue[++size]=data; R2THL
fixUp(size); Wx$q:$h@q
} ,$zlw\
} I0+wczW,^
'<< ~wt
private int size=0; %aBJ+V F
:gscW&k
private int[] queue; KTjlWxD
,,%:vK+V
public int get() { VHr7GAmU
return queue[1]; cuaNAJ
} ,Bw)n,
W#I:j: p
public void remove() { ,M.!z@
SortUtil.swap(queue,1,size--); qlITQKGG
fixDown(1); :5<9/
} [ 5 2zta
file://fixdown P3tG#cJ
private void fixDown(int k) { U!?gdX
int j; 5}bZs` C
while ((j = k << 1) <= size) { D%UZ'bHN*
if (j < size %26amp;%26amp; queue[j] j++; q|i%)V`)-
if (queue[k]>queue[j]) file://不用交换 =yX&p:-&
break; r>~d[,^$m4
SortUtil.swap(queue,j,k); V!77YFen %
k = j; 4:&qTY)H
} in#]3QGV
} m+2`"1IE[
private void fixUp(int k) { 4bev*[k
while (k > 1) { nIQ&gbfO
int j = k >> 1; 2?- 07g
if (queue[j]>queue[k]) L3GC[$S
break; PuZs5J3
SortUtil.swap(queue,j,k); :q64K?X
k = j; rp @
} RF~Ofi
} ^qGA!_
X";ZUp
} E<Dh_K
6QLQ1k`
} _gm?FxV:
n<<=sj$\!
SortUtil： )R8%'X;U
\!JS7!+
package org.rut.util.algorithm; EEs-&
WAB0e~e:|Q
import org.rut.util.algorithm.support.BubbleSort; }PQSCl^I
import org.rut.util.algorithm.support.HeapSort; 0GX10*t.
import org.rut.util.algorithm.support.ImprovedMergeSort; 4s~HfxYT
import org.rut.util.algorithm.support.ImprovedQuickSort; T3 9C lH
import org.rut.util.algorithm.support.InsertSort; X')Zm+
import org.rut.util.algorithm.support.MergeSort; 3<Z'F}lg
import org.rut.util.algorithm.support.QuickSort; /$9 :L
import org.rut.util.algorithm.support.SelectionSort; 9Ue7 ~"=
import org.rut.util.algorithm.support.ShellSort; A,-V$[;~D
~z K@pFeH
/** ihiuSF<NaQ
* @author treeroot %U5P}
* @since 2006-2-2 xshArJ&A
* @version 1.0 8VuZ,!WH#
*/ l{6` k<J(
public class SortUtil { =,4 '"
public final static int INSERT = 1; K6v $#{$6
public final static int BUBBLE = 2; inPE/Ux
public final static int SELECTION = 3; wD6!#t k
public final static int SHELL = 4; |O(-CDQe
public final static int QUICK = 5; t1w2u.]
public final static int IMPROVED_QUICK = 6; UOWIiu
public final static int MERGE = 7; Ln=>@
public final static int IMPROVED_MERGE = 8; x*h`VS(?6
public final static int HEAP = 9; d]CviQUq
97Zk P=Cq
public static void sort(int[] data) { h41$|lonU%
sort(data, IMPROVED_QUICK); Z>x7|Q3CX
} m0|Ae@g~3
private static String[] name={ Zj1ZU[BEcL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6Q2orn[
}; ,2,SG/BB
XLZ j
private static Sort[] impl=new Sort[]{ B:?#l=FL
new InsertSort(), df4sOqU
new BubbleSort(), M'umoZmW0
new SelectionSort(), QJ#u[hsMFp
new ShellSort(), &nqdl+|G*
new QuickSort(), w|}W(=#
new ImprovedQuickSort(), NtY*sUKRD
new MergeSort(), 9fP) Fwih
new ImprovedMergeSort(), =R&)hlm
new HeapSort() }dX/Y/
}; (_w %
4ZI!,lv*
public static String toString(int algorithm){ tw'hh@7-Y
return name[algorithm-1]; ?7yQ&p
} jby~AJf%
=w^TcV
public static void sort(int[] data, int algorithm) { lf%b0na?r
impl[algorithm-1].sort(data); >f\zCT%cf
} -BA"3 S
~$4]HDg
public static interface Sort { -`!_h[
public void sort(int[] data); B2~f;zy`
} Ecxj9h,S
{sC@N![
public static void swap(int[] data, int i, int j) { T-9k<,>?
int temp = data; |N:MZ#};
data = data[j]; aKv[
data[j] = temp; 50LHF%
} A&<?
} )=jT_?9b