[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; |qAU\m"Pc
} kWZ@v+Mk3
int i1=l; ;Yr?"|
int i2=mid+1; 1*VArr6*6
for(int cur=l;cur<=r;cur++){ 2d60o~E
if(i1==mid+1) e$t$,3~
data[cur]=temp[i2++]; jl)7Jd
else if(i2>r) =^5,ua6
data[cur]=temp[i1++]; {0Jpf[.f
else if(temp[i1] data[cur]=temp[i1++]; J? 4E Hl
else ?LAiSg=eq
data[cur]=temp[i2++]; Uv|?@zy#
} <0h,{28
} {^jRV@
FpYeuH%
} JjC& io
o"19{D^.
改进后的归并排序: CTP!{<ii
Kt*kARN?
package org.rut.util.algorithm.support; *~%QXNn`
+YFAZv7`
import org.rut.util.algorithm.SortUtil; /hv2=A
=3H*%
/** $p)e.ZMgE
* @author treeroot ObzFh?W
* @since 2006-2-2 pH/_C0e`7
* @version 1.0 8bf~uHAr
*/ ^U.t5jj
public class ImprovedMergeSort implements SortUtil.Sort { PHh4ZFl]_I
bQ`|G(g-d
private static final int THRESHOLD = 10; TOge!Q>a
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/* a)qlrtCl
* (non-Javadoc) 9\S,$A{{*
* UV#DN`%n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >V$ S\"
*/ 14S_HwX
public void sort(int[] data) { {=Z _L?j
int[] temp=new int[data.length]; m2j]wUh"
mergeSort(data,temp,0,data.length-1); &0k`=?v$
} !;U;5e=0
)TtYm3,
private void mergeSort(int[] data, int[] temp, int l, int r) { .:(T}\]R
int i, j, k; r=4vN=:
int mid = (l + r) / 2; *!c&[- g
if (l == r) ,w|Or}h]7
return; #J`MR05
if ((mid - l) >= THRESHOLD) -E+LA
mergeSort(data, temp, l, mid); LKsK!X
else mrGfu:r
insertSort(data, l, mid - l + 1); >MLPmER
if ((r - mid) > THRESHOLD) D6vhW:t8?
mergeSort(data, temp, mid + 1, r); w^=uq3X?
else M=t;t0
insertSort(data, mid + 1, r - mid); :\cid]y3
W6!o=()
for (i = l; i <= mid; i++) { "x4}FQ
temp = data; T%TfkQ__d
} >^bSjE
for (j = 1; j <= r - mid; j++) { ,\'E<O2T
temp[r - j + 1] = data[j + mid]; `s|^
} ~(P\'H&(h
int a = temp[l]; \]Y=*+{
int b = temp[r]; Dk#4^`qp1
for (i = l, j = r, k = l; k <= r; k++) { %uQOAe55
if (a < b) { (4Ha'uqz
data[k] = temp[i++]; .:9XpKbt
a = temp; a2.@Zyz
} else { m_C#fR /I
data[k] = temp[j--]; \L:+k `
b = temp[j]; Sh;Z\nj
} u_'XUJ32!
} )tp;2rJ/
} 3\Tqs
3( o~|%
/** E! mxa
* @param data /kc@ELl
* @param l fb_q2p} G
* @param i #p7_\+&5s
*/ c-`izn]
private void insertSort(int[] data, int start, int len) { |TQa=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Rwe!xY^d8
} w@i;<LY.
} \o<&s{6L
} ?O.'_YS
} 8umW>
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堆排序： abtYa
byN4?3F
package org.rut.util.algorithm.support; Nc\jA=
;uyQR8
import org.rut.util.algorithm.SortUtil; kB]?95>Wx
`^'0__<M
/** 3!Cab/T
* @author treeroot (P|k$S?m
* @since 2006-2-2 FKU)# Eo
* @version 1.0 &.chqP(|
*/ 5$%CRm
public class HeapSort implements SortUtil.Sort{ ~zcB@; :
CJf4b:SY@
/* (non-Javadoc) jVInTR0f[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ofy)}/i
*/ ~M9&SDT/lB
public void sort(int[] data) { 5z@QAQ
MaxHeap h=new MaxHeap(); (AswV7aGe
h.init(data); ZeE(gtM
for(int i=0;i h.remove(); b.mWB`59
System.arraycopy(h.queue,1,data,0,data.length); dhmrh5Uf
} \(`,z}Ht _
+1>\o|RF
private static class MaxHeap{ 3fq'<5 ^
EE,C@d!*k7
void init(int[] data){ t6! B
this.queue=new int[data.length+1]; GK[[e~#u
for(int i=0;i queue[++size]=data; nna boD
fixUp(size); [WN2ZQ
} WF`
} 2|D<0d#W
x>[f+Tc
private int size=0; C3-I5q(V]
tr$d?
private int[] queue; Bs';!,=
.Dt.7G
public int get() { @X]JMicJ
return queue[1]; Je#vu`.\\
} Ie'iAY
jFGY`9Zw0
public void remove() { ^y2}C$1V
SortUtil.swap(queue,1,size--); _GsHT\
fixDown(1); tW=oAy
} t&nK5p95(
file://fixdown b0h>q$b
private void fixDown(int k) { H':0
int j; bw*D!mm,
while ((j = k << 1) <= size) { ~'t+X
if (j < size %26amp;%26amp; queue[j] j++; c'uDK>
if (queue[k]>queue[j]) file://不用交换 =:(<lKf,<F
break; Azag*M?
SortUtil.swap(queue,j,k); G[s/M\l
k = j; Py~N.@(:1u
} wOrpp3I
} Gn>~CoFN
private void fixUp(int k) { '$Fu3%ft
while (k > 1) { :Nl.< 6+
int j = k >> 1; ,N@N4<C]
if (queue[j]>queue[k]) BBHoD:l
break; Ep8 y
SortUtil.swap(queue,j,k); MURHv3
k = j; Z.3*sp0 yv
} $##LSTA
} YfJQ]tt1
D~r{(u~Ya
} "= >8UR
_2rxDd1#.
} ;0;5+ J7
#r;uM+
SortUtil： DP=\FG"}x
&C.m*^`^
package org.rut.util.algorithm; ?oulQR6:
_v +At;Y
import org.rut.util.algorithm.support.BubbleSort; a.B<W9$`
import org.rut.util.algorithm.support.HeapSort; {!37w[s~
import org.rut.util.algorithm.support.ImprovedMergeSort; Ctpc]lJ}
import org.rut.util.algorithm.support.ImprovedQuickSort; u#`'|ko\9
import org.rut.util.algorithm.support.InsertSort; z[*Y%o8-r
import org.rut.util.algorithm.support.MergeSort; #}aBRKZf6
import org.rut.util.algorithm.support.QuickSort; ^_XV}&7Q
import org.rut.util.algorithm.support.SelectionSort; _NB8>v
import org.rut.util.algorithm.support.ShellSort; 28=L9q
>|_B=<!99W
/** 4 ky/a1y-
* @author treeroot Fu"@)xw/-q
* @since 2006-2-2 ;1L7+.A
* @version 1.0 AS]jJc^
*/ D}L4uz?
public class SortUtil { \!!1o+#1j
public final static int INSERT = 1; q a}=p
public final static int BUBBLE = 2; ~)%DiGW&
public final static int SELECTION = 3; t0+D~F(g
public final static int SHELL = 4; ^ Mw=!n[
public final static int QUICK = 5; '~OKt`SfIo
public final static int IMPROVED_QUICK = 6; :?z E@Ct
public final static int MERGE = 7; THHA~;00YN
public final static int IMPROVED_MERGE = 8; n%I9l]
public final static int HEAP = 9; ~PiCA
?PDrj/: *
public static void sort(int[] data) { &ZAc3@l[c
sort(data, IMPROVED_QUICK); "MU)8$d
} Wm>AR? b
private static String[] name={ *[0)]|r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hnnPi
}; brClYpp,h
xD4G(]d!
private static Sort[] impl=new Sort[]{ `]m/za%7
new InsertSort(), ,7*-%05[\
new BubbleSort(), )kK" 1\m
new SelectionSort(), Ps9YP B-
new ShellSort(), %LBT:Aw
new QuickSort(), n^$HC=}S
new ImprovedQuickSort(), egy#8U)Z
new MergeSort(), OvtiFN^s'
new ImprovedMergeSort(), =%R|@lz_x
new HeapSort() f f_| 3G
}; $-;x8O]u
A3mSSc6
public static String toString(int algorithm){ dX;G[\
return name[algorithm-1]; Jej-b<HmQ
} 31n|ScXv
eKek~U&
public static void sort(int[] data, int algorithm) { "i/3m'<2
impl[algorithm-1].sort(data); s&~.";b
} d&5GkD.P
B)L;ja
public static interface Sort { AAld2"r
public void sort(int[] data); IX y $
} qD/FxR-!
a@U0s+V&a0
public static void swap(int[] data, int i, int j) { v}-jls
int temp = data; {GM8}M~D&
data = data[j]; E!v^j=h$u
data[j] = temp; 8I|2yvhP
} @iD5X.c
} Rhil]|a/