[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; 5dbj{r)s6i
} ov >5+"q)
int i1=l; K(P.i^k
int i2=mid+1; w02C1oGfx
for(int cur=l;cur<=r;cur++){ ^oClf(
if(i1==mid+1) @Q&k6.{4Z
data[cur]=temp[i2++]; H7meI9L
else if(i2>r) g+(Y)9h&
data[cur]=temp[i1++]; &^Gp
else if(temp[i1] data[cur]=temp[i1++]; C<w&mFozL
else <,U$Y>
data[cur]=temp[i2++]; mHH>qW{`
} .*J /F$
} f9)0OHa
_?eT[!oO8
} K<50>uG
r8[)Ccv
改进后的归并排序: O]j<$GG!
d b*J
package org.rut.util.algorithm.support; #3A|Z=,5
[N<rPHT
import org.rut.util.algorithm.SortUtil; +c__U Qx
$e{}SQ;fW
/** 2lqy<o
* @author treeroot ),^pi?
* @since 2006-2-2 A8:eA
* @version 1.0 VssWtL
*/ )HX(-"c
public class ImprovedMergeSort implements SortUtil.Sort { Y.#fpG'
10bv%ZX7
private static final int THRESHOLD = 10; ktp<o.f[
8PWEQ<ev7>
/* ,K|UUosS-#
* (non-Javadoc) 2zuQeFsK
* Yvu?M8aK!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,/!^ZS*
*/ "z_},TCy
public void sort(int[] data) { rFp>A`TJ
int[] temp=new int[data.length]; P.mlk>r
mergeSort(data,temp,0,data.length-1); t >.=q:
} s%RG_"l
H?V b
private void mergeSort(int[] data, int[] temp, int l, int r) { Q\btl/?
int i, j, k; Wr'1Y7z
int mid = (l + r) / 2; y! QYdf?
if (l == r) ,R-aO= %
return; P>03 DkbB
if ((mid - l) >= THRESHOLD) b #Llu$
mergeSort(data, temp, l, mid); Lg|d[*;'7
else /w2-Pgm-[\
insertSort(data, l, mid - l + 1); ,lFp4C
if ((r - mid) > THRESHOLD) 9n"MNedqH
mergeSort(data, temp, mid + 1, r); jX^_(Kg
else QbY@{"" `
insertSort(data, mid + 1, r - mid); FPM l;0{
Iv*u#]{t
for (i = l; i <= mid; i++) { wzBI<0]z
temp = data; QGE0pWL-a
} 8# x7q>?
for (j = 1; j <= r - mid; j++) { Iyb_5 UmpF
temp[r - j + 1] = data[j + mid]; Lu5X~6j"$
} 3e1P!^'\
int a = temp[l]; w"?RbA
int b = temp[r]; LC\U6J't1
for (i = l, j = r, k = l; k <= r; k++) { Z9Z\2t
if (a < b) { MIb[}w=
data[k] = temp[i++]; <d >!%
a = temp; i4XiwjCHN
} else { {faIyKtW
data[k] = temp[j--]; M+:9U&>
b = temp[j]; )ybF@emc
} ~R50-O
} z\woTL6D]
} {Byh:-e<
6RDy2JAOP
/** yT~x7,
* @param data BfD&e`KI
* @param l E=`/}2
* @param i c5:X$k\
*/ Z[eWey_
private void insertSort(int[] data, int start, int len) { 2(m#WK7>F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sz%_9;`dpL
} mkl^2V13~
} 1I)oT-~
} C2\zbC[qm
} A~ _2"
*N"CV={No
堆排序： n=|% H'U
C7DwA/$D
package org.rut.util.algorithm.support; <XN=v!2;
4S[UJ%
import org.rut.util.algorithm.SortUtil; e6^}XRyf
4IvT}Us#+
/** n 8 K6m(
* @author treeroot 1l Cr?
* @since 2006-2-2 OkfxX&n
* @version 1.0 ),|z4~
*/ 3rjKwh7
public class HeapSort implements SortUtil.Sort{ Y*S:/b~y
U3Z-1G~*r
/* (non-Javadoc) kg\8 (@h]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4I&Mdt<^D
*/ u8M_2r
public void sort(int[] data) { l5\V4
MaxHeap h=new MaxHeap(); QHc([%oV
h.init(data); O%N.;Ve
for(int i=0;i h.remove(); 8@RtL,[d
System.arraycopy(h.queue,1,data,0,data.length); (.VS&Kv#U
} \ Ce*5h
)ax>*
private static class MaxHeap{ /?($W|9+l
;mvVo-r*q
void init(int[] data){ +.OdrvN4)
this.queue=new int[data.length+1]; HrfS^B
for(int i=0;i queue[++size]=data; OA(.&5]
fixUp(size); F\L!.B
} D/GE-lq
} RBBmGZ
>k/cm3
private int size=0; U4<c![Pp.
L"n)fe$
private int[] queue; 6U.|0mG[
&/WE{W
public int get() { ~E!kx
return queue[1]; | L1+7
} 5t"FNL <(M
-esQyLx
public void remove() { -6~.;M 5
SortUtil.swap(queue,1,size--); P;mp)1C
fixDown(1); Bv'%$}}-
} j<k6z
file://fixdown #<ST.f@*
private void fixDown(int k) { C/'w
int j; M.r7^9P
while ((j = k << 1) <= size) { w( _42)v]g
if (j < size %26amp;%26amp; queue[j] j++; ZfK[o{9>
if (queue[k]>queue[j]) file://不用交换 !?/:p.
break; P^48]Kj7
SortUtil.swap(queue,j,k); 7 )rL<+
k = j; _53~D=
} mt`CQz"_
} RHMXPsj
private void fixUp(int k) { Lj9RF<39g
while (k > 1) { t(9q6x3|e
int j = k >> 1; }m~MN4 l
if (queue[j]>queue[k]) @un+y9m[C
break; ;i'[c`
SortUtil.swap(queue,j,k); Z7RBJK7|.
k = j; :GO"bsjL
} nw0#gDI|
} /of K7/
2J8:_Ql3I
} u+KZ. n/
J9p4\=9
} H;l_;c`
-Ou.C7ol
SortUtil： tiHR&v
q$mc{F($D
package org.rut.util.algorithm; ]z/R?SM
"\KBF
import org.rut.util.algorithm.support.BubbleSort; IA({RE
import org.rut.util.algorithm.support.HeapSort; mbGma
import org.rut.util.algorithm.support.ImprovedMergeSort; kFV, Fg
import org.rut.util.algorithm.support.ImprovedQuickSort; . R/y`:1:W
import org.rut.util.algorithm.support.InsertSort; j)6p>6
import org.rut.util.algorithm.support.MergeSort; |E.BGdS
import org.rut.util.algorithm.support.QuickSort; [nPs
import org.rut.util.algorithm.support.SelectionSort; /:'>-253
import org.rut.util.algorithm.support.ShellSort; n2hV}t9O
>([,yMIY
/** 3m`>D e
* @author treeroot ~IS8DW$;
* @since 2006-2-2 fyA-*)oHv
* @version 1.0 c$%*p (zY
*/ nGkSS_X
public class SortUtil { =@?[.`
public final static int INSERT = 1; %&| uT
public final static int BUBBLE = 2; R]iV;j|
public final static int SELECTION = 3; "cPg_-n
public final static int SHELL = 4; z+yIP ?s}(
public final static int QUICK = 5; C?T\5}h
public final static int IMPROVED_QUICK = 6; G+t:]\
public final static int MERGE = 7; &Xqxuy ]J
public final static int IMPROVED_MERGE = 8; mV$ebFco0
public final static int HEAP = 9; |#kY_d)10
rUj\F9*5#
public static void sort(int[] data) { ]b!n ;{5
sort(data, IMPROVED_QUICK); -` U|5
} EZ]4cd/i
private static String[] name={ N}K [Q=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bYnq,JRA
}; $2?AJ/2r$b
0!_?\)X
private static Sort[] impl=new Sort[]{ #e|o"R;/`
new InsertSort(), q!eE~O;A
new BubbleSort(), aQtd6L+ J
new SelectionSort(), @wI>0B
new ShellSort(), /[.V(K D
new QuickSort(), !S#3mT-
new ImprovedQuickSort(), 4JAz{aw'b
new MergeSort(), . : Wf>:
new ImprovedMergeSort(), j)?M
new HeapSort() ehr-o7](
}; *WQ?r&[_'
*;Mi/^pzK
public static String toString(int algorithm){ |'nQvn:{
return name[algorithm-1]; VAz4@r7hkq
} ApXf<MAy
'z(Y9%+a
public static void sort(int[] data, int algorithm) { f +{=##'0
impl[algorithm-1].sort(data); <gkE,e9
} alaL/p{O
Yi*F;V
public static interface Sort { &>,;ye>A
public void sort(int[] data); K8;SE!
} Z~~6y6p
3R+%C*7
public static void swap(int[] data, int i, int j) { o$sD9xx
int temp = data; %o0b~R
data = data[j]; P0,]`w
data[j] = temp; IR6W'vA
} @MES.g
} /\w4k