[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; !#cZ!
} E><!Owxt/
int i1=l; *4}lV8
int i2=mid+1; <qZ"W6&&
for(int cur=l;cur<=r;cur++){ ~@a7RiE@
if(i1==mid+1) $tvGS6p>
data[cur]=temp[i2++]; q@ !p
else if(i2>r) VesW7m*z
data[cur]=temp[i1++]; Vlb L p;
else if(temp[i1] data[cur]=temp[i1++]; _J^q|
else 7+]T}4;
data[cur]=temp[i2++]; `L0aQ$'>z
} DDxNqVVt4
} OdX-.FFl
CORX .PQ
} 5MY+O\
g*$ 0G
改进后的归并排序: bm1+|gssn
VU,\OOp
package org.rut.util.algorithm.support; W}B4^l
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import org.rut.util.algorithm.SortUtil; <()xO(
$s2Ty1
/** etF?,^)h=g
* @author treeroot \ZrLh,6f.
* @since 2006-2-2 K@xp!
* @version 1.0 m(JFlO
*/ (2vR8
public class ImprovedMergeSort implements SortUtil.Sort { /_~b~3{u
'Rk~bAX
private static final int THRESHOLD = 10; !ZP1?l30
|u8hxa
/* KLBV(`MS
* (non-Javadoc) -,jJ{Y~
* kf~71G+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) js )G
*/ uYjJDLYoHl
public void sort(int[] data) { =y>P>&sI
int[] temp=new int[data.length]; !v\m%t|.
mergeSort(data,temp,0,data.length-1); 0@a6r=`el
} \phG$4(7+
&8t?OpB =h
private void mergeSort(int[] data, int[] temp, int l, int r) { o:C:obiQbu
int i, j, k; cn ,zUG!-h
int mid = (l + r) / 2; Z5~dU{XsT
if (l == r) r$ue1bH}|
return; ~D@pk>I
if ((mid - l) >= THRESHOLD) )CS7>Vx
mergeSort(data, temp, l, mid); AEkgm^t.{
else &*g5kh{
insertSort(data, l, mid - l + 1); S8j;oJ2d
if ((r - mid) > THRESHOLD) u&l2s&i
mergeSort(data, temp, mid + 1, r); fX G+88:2
else }]sI?&xB
insertSort(data, mid + 1, r - mid); ><iEVrpN
#I9|>XE1
for (i = l; i <= mid; i++) { DoWY*2E
temp = data; bTC2Ya
} )>at]mH
for (j = 1; j <= r - mid; j++) { BXueOvO8
temp[r - j + 1] = data[j + mid]; A`u04Lm7
} v}dt**l
int a = temp[l]; THQW8 V
int b = temp[r]; oMda)5 &
for (i = l, j = r, k = l; k <= r; k++) { {B|U8j[
if (a < b) { S4<@ji
data[k] = temp[i++]; | (P%<
a = temp; P,AS`=z
} else { 9\TvX!)h
data[k] = temp[j--]; LXIlrZ9D5
b = temp[j]; `g%]z@'+?
} !$h%$se
} 18w[T=7)
} Zx25H"5j
Faa:h#
/** t&SJ!>7_c
* @param data uR)itmc?
* @param l 'xZxX3
* @param i #l~d
*/ XRs/gUT
private void insertSort(int[] data, int start, int len) { If6wkY6sR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g2C-)*'{yh
} `ZN@L<I6
} =Z/'|;Vd_x
} +YT/od1t7
} Hk2@X(
(o^V[zV
堆排序： 4M(w<f\5F
P,h@F+OZN
package org.rut.util.algorithm.support; k}>l+_*+7
05*_h0}
import org.rut.util.algorithm.SortUtil; SiojOH
#Vn=(U4}!_
/** m'k`p5[=h
* @author treeroot &g,K5at
* @since 2006-2-2 R2Tvo?xI7
* @version 1.0 ?-<t-3%hyV
*/ K1O/>dN_\O
public class HeapSort implements SortUtil.Sort{ 9YHSL[
SfJ/(q
/* (non-Javadoc) k;zbq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g/+M&k$
*/ ] >ipC,v
public void sort(int[] data) { Djf2ir'
MaxHeap h=new MaxHeap(); dG7sY O@U
h.init(data); ~\<ZWU<BE
for(int i=0;i h.remove(); xx;'WL,g
System.arraycopy(h.queue,1,data,0,data.length); 6z%3l7#7Yi
} :;0?;dpO
Vu`dEvL?
private static class MaxHeap{ tP!sOvQ:
j K[VEhs
void init(int[] data){ a-!"m
this.queue=new int[data.length+1]; 1I3u~J3]/
for(int i=0;i queue[++size]=data; l0D.7>aj
fixUp(size); a0)+=*$
} 1b3Lan_2
} 2l5@gDk5
[%l+ C~m
private int size=0; Qk-y0
w?M*n<) O
private int[] queue; +\Q6Onqr
.E;6Xx_+r
public int get() { od^ha
return queue[1]; QH\*l~;B\
} ^fK8~g;rB
(-dJ0!
public void remove() { qwFn(pK[
SortUtil.swap(queue,1,size--); m$LZ3=v%8
fixDown(1); W\~ZmA.
} "r"]NyM
file://fixdown R<UjhCvx.
private void fixDown(int k) { aE{b65'Dt
int j; "6KOql3
while ((j = k << 1) <= size) { Cc Ni8Wg_
if (j < size %26amp;%26amp; queue[j] j++; sef!hS06
if (queue[k]>queue[j]) file://不用交换 njUM>E,'
break; {zF
SortUtil.swap(queue,j,k); eA4*Be;9e
k = j; m(OBk;S~
} k}T~N.0
} jHz]
private void fixUp(int k) { &u=FLp5
while (k > 1) { svo^#V~h'
int j = k >> 1; >MQW{^
if (queue[j]>queue[k]) -IX;r1UD
break; MeplM$9
SortUtil.swap(queue,j,k); {{EQM +
k = j; q6_1`Ew
} #UWQ (+F
} 6@F Z,e
3"L$*toRA
} Be]o2N;J
GtGToI
} :cC`wX$
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SortUtil： z0Zl'
^E:;8h4$9
package org.rut.util.algorithm; .!6ufaf$
nQ~q-=,L
import org.rut.util.algorithm.support.BubbleSort; uwQ4RYz
import org.rut.util.algorithm.support.HeapSort; ,MvvW{EY
import org.rut.util.algorithm.support.ImprovedMergeSort; MPL2#YU/a
import org.rut.util.algorithm.support.ImprovedQuickSort; 1}ToR=
import org.rut.util.algorithm.support.InsertSort; (U.&[B
import org.rut.util.algorithm.support.MergeSort; O0$ijJa|
import org.rut.util.algorithm.support.QuickSort; hR`dRbBi%
import org.rut.util.algorithm.support.SelectionSort; =)I{KT:y
import org.rut.util.algorithm.support.ShellSort; O/-OW: 03
@K+u+} R
/** >XZq=q]E!
* @author treeroot 5N|77AAxK
* @since 2006-2-2 15s?QSKj
* @version 1.0 1gm{.*G
*/ V&}Z# 9Dx
public class SortUtil { f Fz8m
public final static int INSERT = 1; jcG4h/A
public final static int BUBBLE = 2; bg=`
public final static int SELECTION = 3; ?b7vc^E&
public final static int SHELL = 4; gTQ6B,`/8
public final static int QUICK = 5; QB@*/Le
public final static int IMPROVED_QUICK = 6; ome>Jbdhe
public final static int MERGE = 7; jS- QTG!=
public final static int IMPROVED_MERGE = 8; d*AV(g#B
public final static int HEAP = 9; 1)Ag|4
q;AQ6k(
public static void sort(int[] data) { ?41| e+p
sort(data, IMPROVED_QUICK); TX+t
} #UI`G3w<
private static String[] name={ }}xR?+4A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bQeYFY#^
}; 0yZw`|Zh[
34l=U?
private static Sort[] impl=new Sort[]{ D@ lJ^+
new InsertSort(), ){(cRB$
new BubbleSort(), Ud9\;Qse
new SelectionSort(), d)AkA\neWo
new ShellSort(), pKJ[e@E^
new QuickSort(), SwL\=nq+~
new ImprovedQuickSort(), (J;?eeP
new MergeSort(), 50Jr(OeU<
new ImprovedMergeSort(), ujSzm=_P
new HeapSort() _HL3XT
}; [&4y@
UM]wDFn'E
public static String toString(int algorithm){ a3)#tt=rA
return name[algorithm-1]; j>:T)zhyY
} @]7\.>)
ynd}w G'
public static void sort(int[] data, int algorithm) { =0-qBodbl
impl[algorithm-1].sort(data); H9Z3.F(2
} E:tUbWVp
rTJWftH!
public static interface Sort { VcL
public void sort(int[] data); eyG.XAP
} 0VZj;Jg}q
m6gr!aT
public static void swap(int[] data, int i, int j) { (Zn\S*_@/
int temp = data; %2+]3h>g
data = data[j]; @rF\6I
data[j] = temp; Qp54(`
} pJ(l=a
} `fRy"44nR