[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; S+*cbA{J|
} 4IGxI7~27#
int i1=l; ~440#kj<
int i2=mid+1; @&/\r 7 '
for(int cur=l;cur<=r;cur++){ ?2~U2Ir]:
if(i1==mid+1) 8SD}nFQ
data[cur]=temp[i2++]; =O^7TrM
else if(i2>r) $k(9 U\y-
data[cur]=temp[i1++]; ofEqvoi@
else if(temp[i1] data[cur]=temp[i1++]; {qAu/ixp
else tvWH04T
data[cur]=temp[i2++]; KHJ=$5r)
} mW$ot.I
} -iQsi4
"<dN9l>
} A. Nz_!
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改进后的归并排序: pB'x_z
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package org.rut.util.algorithm.support; ;2W2MZ!TF
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import org.rut.util.algorithm.SortUtil; $u,GVq~
"=`~iXT{e
/** 0e9A+&r
* @author treeroot w:tGPort
* @since 2006-2-2 DM/hcY$MW
* @version 1.0 Y<ElJ>A2I
*/ $PfV<Yj'B
public class ImprovedMergeSort implements SortUtil.Sort { >DmRP7v
chwh0J;
private static final int THRESHOLD = 10; vadM1c*z
0O['w<_
/* j[T%'%
* (non-Javadoc) er\:U0fr#@
* #HcI4j:s!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qi[(*bFK7
*/ 'Fzuc^G(d
public void sort(int[] data) { kOM-
int[] temp=new int[data.length]; LI$L9eNv;Y
mergeSort(data,temp,0,data.length-1); )O-sWh4
} F0: &>'}
3&'R1~Vh
private void mergeSort(int[] data, int[] temp, int l, int r) { Cs;<'[_?YO
int i, j, k; NQ3|\<Wt
int mid = (l + r) / 2; i~AJ.@ #
if (l == r) AuM:2N2
return; 'qlxAYw<f
if ((mid - l) >= THRESHOLD) EreAn
mergeSort(data, temp, l, mid); iDvpXn
else h&'J+b
insertSort(data, l, mid - l + 1); A@{ !:_55
if ((r - mid) > THRESHOLD) ][N) 2_^M
mergeSort(data, temp, mid + 1, r); /op/g]O}
else RQJ9MGw
insertSort(data, mid + 1, r - mid); .hnF]_QQ
.kzms
for (i = l; i <= mid; i++) { 9w$7VW;
temp = data; Ty iU1,oO
} [EcV\.
for (j = 1; j <= r - mid; j++) { JbVi1?c
temp[r - j + 1] = data[j + mid]; 6A@Lj*:2m
} VG#$fRrZ
int a = temp[l]; :EaiM J_=
int b = temp[r]; :=B[yD!
for (i = l, j = r, k = l; k <= r; k++) { nR#a)et
if (a < b) { a#6,#Q"
data[k] = temp[i++]; A9.;>8!u
a = temp; 92NC]_jw
} else { 8s&2gn1
data[k] = temp[j--]; _.hIv8V
b = temp[j]; i&B?4J)
} zVn*!c
} GHqBnE{B
} vzQyE0T/
@YbZ8Uc
/** /TG| B Eb
* @param data 2w;G4
* @param l +;5Wp$M\
* @param i PH{c,
*/ 4jPwL|#
private void insertSort(int[] data, int start, int len) { {K6Kx36
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z4nou>
} >cSi/a,L
} $R3.yX=[\
} oO}>i0ax*
} X$ejy/+.
s:G[Em1
堆排序： gx&\Kw6HM
CJtr0M<U+
package org.rut.util.algorithm.support; \_)02ZT:
]r]+yM|
import org.rut.util.algorithm.SortUtil; -y9Pn>~V
Ed8U;U b
/** <m:4g ,6
* @author treeroot >J?jr&i
* @since 2006-2-2 {[rO2<MkA#
* @version 1.0 939]8BERt
*/ fjF!>Dy
public class HeapSort implements SortUtil.Sort{ G<Th<JF)Q
'XG:1Bpm
/* (non-Javadoc) kz3?j<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s-Q7uohK
*/ cG<Q`(5~
public void sort(int[] data) { H{&a)!Ms
MaxHeap h=new MaxHeap(); m.|qVN
h.init(data); #.RG1-L
for(int i=0;i h.remove(); v_[)FN"]Y.
System.arraycopy(h.queue,1,data,0,data.length); F?!};~$=Z
} fB@K'JQG
nA|gQibA
private static class MaxHeap{ kwDjK"
-DbH6u3
void init(int[] data){ GC,vQ\
this.queue=new int[data.length+1]; ?T$*5d
for(int i=0;i queue[++size]=data; :H~UyrN
fixUp(size); 5n-9#J$
} R*zBnHAb!
} X=-gAutfE=
ze-TBh/
private int size=0; JsHxQ0Tw
%D`^
private int[] queue; ktkn2Twa/
\fkS_r,i
public int get() { m&(%&}g
return queue[1]; f/$-Nl.
} 3W%f#d$`
00$ @0
public void remove() { vCYSm 0
SortUtil.swap(queue,1,size--); \pT^Zhp)
fixDown(1); $l0eI
} 58a)&s[+
file://fixdown `lH1IA/3
private void fixDown(int k) { 5e~ j
int j; dlU JYI
while ((j = k << 1) <= size) { .rD#1)O
if (j < size %26amp;%26amp; queue[j] j++; {PP^Rb)
if (queue[k]>queue[j]) file://不用交换 FkB6*dm-
break; G "c&C
SortUtil.swap(queue,j,k); )Gu0i7iN
k = j; P':]A{<Z
} ^59YfC<f
} [esX{6,i
private void fixUp(int k) { uyS^W'fF
while (k > 1) { {7j6$.7J$&
int j = k >> 1; )VV4HoH]8
if (queue[j]>queue[k]) :G6 xJlE|
break; ~_/<PIm
SortUtil.swap(queue,j,k); \Nh^Ig
k = j; v '"1/% L
} rH [+/&w5
} E.WNykF-
9Y!0>&o
} P22y5z~
DKaG?Y,*p
} )U"D4j*p
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SortUtil： 8\W3FvQ
Lv`8jSt\
package org.rut.util.algorithm; ImT+8pa
rTm>8et
import org.rut.util.algorithm.support.BubbleSort; 0k.#
import org.rut.util.algorithm.support.HeapSort; 7>c 0V&
import org.rut.util.algorithm.support.ImprovedMergeSort; tq4"QBIKh
import org.rut.util.algorithm.support.ImprovedQuickSort; w<8O=
import org.rut.util.algorithm.support.InsertSort; -E,{r[Sp
import org.rut.util.algorithm.support.MergeSort; 7><* 9iOW
import org.rut.util.algorithm.support.QuickSort; R?={{+O
import org.rut.util.algorithm.support.SelectionSort; 5KA FUR0
import org.rut.util.algorithm.support.ShellSort; hr$VVbOho
;c \zgs~"T
/** ?fqkM
* @author treeroot *1 J#Mdd
* @since 2006-2-2 inq4CGY
* @version 1.0 nEa'e5 lg
*/ +0JH"L5!
public class SortUtil { Pv/%s) &y&
public final static int INSERT = 1; )0 42?emn
public final static int BUBBLE = 2; pRDON)$
public final static int SELECTION = 3; leX7(Y;!a7
public final static int SHELL = 4; GakmROZ@9
public final static int QUICK = 5; qQ?,|4)y
public final static int IMPROVED_QUICK = 6; *BP\6"X
public final static int MERGE = 7; oto wvm
public final static int IMPROVED_MERGE = 8; zwniS6R1
public final static int HEAP = 9; k8t Na@H
0W<nE[U
public static void sort(int[] data) { hD9'`SQ
sort(data, IMPROVED_QUICK); sWpRX2{5,
} nw]e_sm
private static String[] name={ \CEnOq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pvb+
}; 2)j#O
^r?sgJ
private static Sort[] impl=new Sort[]{ ]Pg?(lr6)
new InsertSort(), ,~=z_G`R
new BubbleSort(), 9<0$mE^:
new SelectionSort(), l#5k8+s
new ShellSort(), VES4x%r=
new QuickSort(), :b3lJ-dB
new ImprovedQuickSort(), uq#h\p|
new MergeSort(), 07G*M ]
new ImprovedMergeSort(), >sl1 cC
new HeapSort() =+sIX3
}; 5k7(!
+%cr?g
public static String toString(int algorithm){ 8d*<Aki?;
return name[algorithm-1]; KWuj_.;
} xa%ktn
88+\mX;A#
public static void sort(int[] data, int algorithm) { 4-?`#
impl[algorithm-1].sort(data); ;^H+ |&$>
} a?Qcf;o
{0Ol/N;|D
public static interface Sort { ~%!U,)-
public void sort(int[] data); kAe-d
} I!i#=
`sp'Cl!
public static void swap(int[] data, int i, int j) { #t9=qR~"
int temp = data; rc{[\1 -N
data = data[j]; l4BO@
data[j] = temp; 5fDtSsW
} (k2J{6]
} .WPR}v,.Z