[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; tFOhL9T
} w+u3*/Zf
int i1=l; -X2Buz8
int i2=mid+1; 9EibIOD^/
for(int cur=l;cur<=r;cur++){ I:1C8*/
if(i1==mid+1) `7V]y-
data[cur]=temp[i2++]; 56kI 5:
else if(i2>r) kJT)r6
data[cur]=temp[i1++]; ;"-&1qHN
else if(temp[i1] data[cur]=temp[i1++]; ,(^*+G.i
else ope^~+c~\
data[cur]=temp[i2++]; 12gU{VD
} S9FE
} .Rs^YZF
H8}oIA"b
} @Qt{jI!
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改进后的归并排序: k>si5'W
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package org.rut.util.algorithm.support; K_Eux rPn
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import org.rut.util.algorithm.SortUtil; #BH*Z(
`1IgzKL9
/** R`E~ZWC4V
* @author treeroot $c(nF01
* @since 2006-2-2 -;WGS o
* @version 1.0 B>P{A7Q
*/ }y gD3:vN7
public class ImprovedMergeSort implements SortUtil.Sort { tJ$_lk ~6q
PtiOz :zV
private static final int THRESHOLD = 10; >7DhTM-A
}9}h*RWm
/* 4zFW-yy
* (non-Javadoc) <*cikXS
* LG#t<5y~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {9.|2%a
*/ lA8`l>I
public void sort(int[] data) { Vp@?^imL
int[] temp=new int[data.length]; JYHl,HH#z
mergeSort(data,temp,0,data.length-1); SSMHoJGm
} J)p l|I
l}K37f
private void mergeSort(int[] data, int[] temp, int l, int r) { mrtb*7`$
int i, j, k; Bh-ym8D
int mid = (l + r) / 2; 1tFNM[R
if (l == r) HY:7? <r
return; tf`^v6m%]
if ((mid - l) >= THRESHOLD) ds[|
mergeSort(data, temp, l, mid); d5:c^`
else FXkM#}RgNm
insertSort(data, l, mid - l + 1); > /caXvS
if ((r - mid) > THRESHOLD) )bscBj@
mergeSort(data, temp, mid + 1, r); 3AN/ H
else I^$fMdT
insertSort(data, mid + 1, r - mid); smo~7;
<frutU16\
for (i = l; i <= mid; i++) { k~1?VQ+?M
temp = data; >}6%#CAf
} draN0vf
for (j = 1; j <= r - mid; j++) { wNdisI
temp[r - j + 1] = data[j + mid]; ~oY^;/ j
} \z(gqkc 6
int a = temp[l]; S;`A{Mow
int b = temp[r]; 2`=7_v
for (i = l, j = r, k = l; k <= r; k++) { _KAQ}G3
if (a < b) { ;>7De8v@@
data[k] = temp[i++]; 0YDR1dO(*
a = temp; '?(% Zxw%&
} else { ln dx"prW
data[k] = temp[j--]; ^^D0^k!R
b = temp[j]; F0@gSurg)
} k\?Ii<m
} &0JI!bR(
} k@W1-D?
Oxd]y1
/** 2g! +<YZ~
* @param data j|#Bo:2km
* @param l 9p(.A$
* @param i ,Ko!$29[
*/ H"WprHe
private void insertSort(int[] data, int start, int len) { Z/+#pWBI!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o!A+&{
} C]A.i2o8
} Lw>N rY(Y
} g]0_5?i
} cyz3,3\e
@E|}Y
堆排序： =B@2#W#
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package org.rut.util.algorithm.support; $6SW;d+>n
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import org.rut.util.algorithm.SortUtil; Ds:'Lb
rFL;'Cj@
/** t1x1,SL
* @author treeroot j&qub_j"xX
* @since 2006-2-2 brUF6rQ
* @version 1.0 ?&1!vz
*/ g`QEu 5v
public class HeapSort implements SortUtil.Sort{ [d]9Oa4
TuaBm1S{f
/* (non-Javadoc) h@ryy\9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qt<&WB fn
*/ $(x]
public void sort(int[] data) { nAdf=D'P
MaxHeap h=new MaxHeap(); |&i<bqLw:
h.init(data); {"KMs[M
for(int i=0;i h.remove(); `<d }V2rdz
System.arraycopy(h.queue,1,data,0,data.length); R (n2A$
} &Au@S$ij
}k.Z~1y
private static class MaxHeap{ ncT&Gr
'6%2.[o
void init(int[] data){ `e}B2;$A3
this.queue=new int[data.length+1]; K]w'&Qm8W
for(int i=0;i queue[++size]=data; R0*|Lo$6
fixUp(size); X#^[<5
} LZxNAua
} 4BpZJ~(p
"fOV^B
private int size=0; s!$a\k
:Zw2'IV
private int[] queue; AH~E)S
R.<g3"Lm>
public int get() { rjnrju+
return queue[1]; e$Pj.>-<=
} mQ"-,mMI
pOoEI+t
public void remove() { DZtsy!xA
SortUtil.swap(queue,1,size--); ;Q`lNFa
fixDown(1); a0H+.W+]
} 67FWa
file://fixdown 7WzxA=*#
private void fixDown(int k) { )zDCu`
int j; &wDs6xq
while ((j = k << 1) <= size) { o-B$J?
if (j < size %26amp;%26amp; queue[j] j++; X|]AT9W
if (queue[k]>queue[j]) file://不用交换 >Cq<@$I2EB
break; mj7#&r,1l
SortUtil.swap(queue,j,k); G$('-3@i`w
k = j; PXNuL&
} c'\dFb9a
} gL/9/b4
private void fixUp(int k) { `C'H.g\>2Q
while (k > 1) { #&e-|81H
int j = k >> 1; *MW\^PR?
if (queue[j]>queue[k]) >uEzw4w
break; &s>Jb?_5Mx
SortUtil.swap(queue,j,k); S)"Jf?
k = j; b^vQpiz
} )Hr`MB
} YKK*ER0
XfIJ4ZM5
} 2=!RQv~%
Y"$xX8o
} b4Ekqas
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SortUtil： KLk~Y0$:v
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package org.rut.util.algorithm; !ULn7\@
:e+jU5;]3
import org.rut.util.algorithm.support.BubbleSort; <<O$ G7c
import org.rut.util.algorithm.support.HeapSort; *wjrR1#81x
import org.rut.util.algorithm.support.ImprovedMergeSort; -M#Wt`6A
import org.rut.util.algorithm.support.ImprovedQuickSort; $M:*T.3
import org.rut.util.algorithm.support.InsertSort; C\hM =%
import org.rut.util.algorithm.support.MergeSort; i SQu#p@
import org.rut.util.algorithm.support.QuickSort; B&"Q\'c
import org.rut.util.algorithm.support.SelectionSort; -MBxl`JU
import org.rut.util.algorithm.support.ShellSort; [0("Q;Ec[j
XW92gI<O
/** w5 Li&m
* @author treeroot @_{=V0
* @since 2006-2-2 ?:eV%`7
* @version 1.0 ;5( UzQU
*/ DzRFMYBR
public class SortUtil { pT6$DB#
public final static int INSERT = 1; +Vdpy(
public final static int BUBBLE = 2; NDokSw-
public final static int SELECTION = 3; 9%obq/Lb
public final static int SHELL = 4; YtLt*Ig%
public final static int QUICK = 5; 86a\+Kz%%L
public final static int IMPROVED_QUICK = 6; W[r>.7>?h
public final static int MERGE = 7; '$+ogBS
public final static int IMPROVED_MERGE = 8; */S_Icf
public final static int HEAP = 9; Ab;.5O$y
t sRdvFFq
public static void sort(int[] data) { A^SgI-y|
sort(data, IMPROVED_QUICK); <IW$m!{VG
} @IZnFHN
private static String[] name={ ~pky@O#b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uCB=u[]y4
}; l9"s>PU
F,CTZ~
private static Sort[] impl=new Sort[]{ %J-GKpo/S
new InsertSort(), >y+B
new BubbleSort(), f* wx<
new SelectionSort(), i,VMd
new ShellSort(), O^rDHFj,
new QuickSort(), b|(:[nB
new ImprovedQuickSort(), |JsZJ9W+J
new MergeSort(), _,*r_D61S
new ImprovedMergeSort(), `kSZX:=};
new HeapSort() `XDl_E+>l
}; RT8 ?7xFc
G^@5H/)
public static String toString(int algorithm){ M)(DZ}
return name[algorithm-1]; F((4U"
} 0<*<$U
Vi|#@tC'
public static void sort(int[] data, int algorithm) { cm+P]8o%{
impl[algorithm-1].sort(data); &#i"=\d
} b7ZSPXV
NwfVL4Xg
public static interface Sort { `@yp+8
public void sort(int[] data); PQE=D0
} DVeE1Q
2B`JGFcdcB
public static void swap(int[] data, int i, int j) { \GU<43J2uo
int temp = data; b\5F]r
data = data[j]; !bP@n
data[j] = temp; {K!)Ss
} TkF[x%o
} bW:!5"_{H