[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; _74UdD{^o
} ' PELf P8
int i1=l; >)LAjwhBp
int i2=mid+1; a2o.a2
for(int cur=l;cur<=r;cur++){ >rKhlUD
if(i1==mid+1) zhX;6= X2
data[cur]=temp[i2++]; /9pbnzn
else if(i2>r) X<Z(]`i
data[cur]=temp[i1++]; _ \l HI
else if(temp[i1] data[cur]=temp[i1++]; K5{{:NR$
else GA\2i0ow
data[cur]=temp[i2++]; Rb#/qkk/
} pw=F' Y@N
} Uj,g]e8e
*6XRjq^#
} V{0%xz #
! tGiTzzp
改进后的归并排序: UxeL cUP
gwiR/(1
package org.rut.util.algorithm.support; Tv\HAK<N
(k8Z=/N~
import org.rut.util.algorithm.SortUtil; /_q#ah
M|k&TTV
/** .3@Ng
* @author treeroot to'j2jP
* @since 2006-2-2 (etUEb^}T
* @version 1.0 yw'ezpO"
*/ JA<~xo[Q9
public class ImprovedMergeSort implements SortUtil.Sort { )6=gooe]
GMdI0jaG#
private static final int THRESHOLD = 10; AFGwT%ZD
]U[&uymax
/* =5ug\S
* (non-Javadoc) @ u+|=x];
* 8b7;\C~$p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x6ahZ
*/ Lyr2(^#:
public void sort(int[] data) { G?<pBMy
int[] temp=new int[data.length]; LJWTSf"f?
mergeSort(data,temp,0,data.length-1); _dr*`yXi
} 3za`>bUN
0R|K0XH#$
private void mergeSort(int[] data, int[] temp, int l, int r) { Z(HZB
int i, j, k; D-pX<0-y
int mid = (l + r) / 2; #EG?9T
if (l == r) 1i3V!!r
return; &hI>L
if ((mid - l) >= THRESHOLD) EjSD4
mergeSort(data, temp, l, mid); yp p4L|R
else 4{Udz!
insertSort(data, l, mid - l + 1); 9#Y2`pT
if ((r - mid) > THRESHOLD) zmb@*/fK
mergeSort(data, temp, mid + 1, r); p![&8i@ym
else J)*8|E9P
insertSort(data, mid + 1, r - mid); s`c?:
j=W@P-
for (i = l; i <= mid; i++) { C`0%C7
temp = data; |{f~Ks%
} VjB*{,
for (j = 1; j <= r - mid; j++) { kwlC[G$j7
temp[r - j + 1] = data[j + mid]; .!yq@Q|=u
} 4fty~0i=z
int a = temp[l]; uoCGSXsi
int b = temp[r]; Szts<n5
for (i = l, j = r, k = l; k <= r; k++) { E*k([ZL
if (a < b) { sKd)BA0`
data[k] = temp[i++]; bnr|Y!T}Bi
a = temp; s@~/x5jwCs
} else { hJ[UB
data[k] = temp[j--]; N@()F&e
b = temp[j]; o,FUfO}F
} G3dhM#!
} 1Nj=B_T
} f=m/ -mAA
o?wt$j-
/** l3p3tT3+
* @param data &SmXI5>Bo0
* @param l U:n*<l-k}
* @param i EkZjO Ci
*/ K]<u8eF
private void insertSort(int[] data, int start, int len) { b[srG6{ &
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o1k#."wHr
} F;kvH
} ao$):,2*
} RZh}:
} d}-'<Z#G
xNX'~B^4d
堆排序： j"hASBTgp
;SY.WfVA7
package org.rut.util.algorithm.support; e+@xsn3
v=p0 +J>
import org.rut.util.algorithm.SortUtil; ,|pp67
t$ZkdF
/** J3=BE2L
* @author treeroot *1bzg/T<
* @since 2006-2-2 "IwM:v
* @version 1.0 )0-o%- e
*/ i&&qbZt
public class HeapSort implements SortUtil.Sort{ 5UOk)rOf
"8HE^Po/pn
/* (non-Javadoc) s$GF 95^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ET-Vm >]
*/ B 8{ uR
public void sort(int[] data) { jczq`yW
MaxHeap h=new MaxHeap(); sRq U]i8l
h.init(data); Pp*}R2
for(int i=0;i h.remove(); ~@P)tl>
System.arraycopy(h.queue,1,data,0,data.length); j=ihbR^]Tl
} Q2c*.Y
N9]xJgTze
private static class MaxHeap{ Ttv'k*$cP
O]qPmEj
void init(int[] data){ /9_#U#vhY
this.queue=new int[data.length+1]; 2B` 8eb
for(int i=0;i queue[++size]=data; \r;F2C0*i
fixUp(size); FH*RU1Z
} &fSTR-8ev#
} hYb9`0G"2
C`4gsqD;Z
private int size=0; .pvxh|V
10MU-h.)
private int[] queue; \hbiU]
|ym%| B
public int get() { tcA;#^jc
return queue[1]; U3F3((EYJ
} ^~l $&~
f&yQhe6q
public void remove() { =M<z8R
SortUtil.swap(queue,1,size--); zZ,Yfd|W
fixDown(1); )ooWQ-%P
} &N\[V-GP2G
file://fixdown 0=;YnsY
private void fixDown(int k) { [6RfS
int j; gX,9Gh
while ((j = k << 1) <= size) { 2[up+;%Y
if (j < size %26amp;%26amp; queue[j] j++; A]?^ H<
if (queue[k]>queue[j]) file://不用交换 %&<W(|U1<
break; a)9rs\Is{
SortUtil.swap(queue,j,k); 16$y`~c-z
k = j; >}SRSqJu
} JD~aUB%
} &71e5<(dG
private void fixUp(int k) { (F8AL6
while (k > 1) { {oWsh)[x2
int j = k >> 1; 6[?}6gQ
if (queue[j]>queue[k]) sX:lE^)-z
break; XnXb&@Y
SortUtil.swap(queue,j,k); !Iq{ 5:
k = j; Wsm`YLYkt!
} bGv4.:)
} p4>,Fwy2
CLN+I'uX0
} %S#WPD'Y
Hr }k5'
} ow.6!tl0=h
Vk7=7%xW
SortUtil： <4mQ*6
g:gB`8w?
package org.rut.util.algorithm; ^\wl2
inF6M8 A1
import org.rut.util.algorithm.support.BubbleSort; n}J^6:1
import org.rut.util.algorithm.support.HeapSort; SxMj,u%X/
import org.rut.util.algorithm.support.ImprovedMergeSort; [xdj6W
import org.rut.util.algorithm.support.ImprovedQuickSort; - DL"-%X.
import org.rut.util.algorithm.support.InsertSort; HXks_ix )
import org.rut.util.algorithm.support.MergeSort; R]QpMj%o
import org.rut.util.algorithm.support.QuickSort; C5n?0I9
import org.rut.util.algorithm.support.SelectionSort; 5I,$EGG
import org.rut.util.algorithm.support.ShellSort; S()Za@ [a$
s[c^"@HT
/** (ZPXdr
* @author treeroot !k<:k "7
* @since 2006-2-2 ~7SH4Cr
* @version 1.0 J70D+
*/ a$}mWPp+f
public class SortUtil { U:lv^QPG
public final static int INSERT = 1; o^ h(#%O
public final static int BUBBLE = 2; _V@P-Ye
public final static int SELECTION = 3; #WufZ18#
public final static int SHELL = 4; '6zd;l9Z
public final static int QUICK = 5; 2u:4$x8
public final static int IMPROVED_QUICK = 6; -<W2PY<
public final static int MERGE = 7; m0( E kK
public final static int IMPROVED_MERGE = 8; #Lka+l;L7
public final static int HEAP = 9; dr})-R
o&-L0]i|
public static void sort(int[] data) { T-8J
sort(data, IMPROVED_QUICK); 77Q}=80GU;
} (0jr;jv
private static String[] name={ \G;CQV#{9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7g6RiH}
}; 59!)j>f
fLB1)kTS
private static Sort[] impl=new Sort[]{ 77We;a
new InsertSort(), UR3$B%i
new BubbleSort(), GLh]G(
new SelectionSort(), D1X{:#|
new ShellSort(), X?dfcS*!n
new QuickSort(), |}S1o0v{(a
new ImprovedQuickSort(), t26ij`V
new MergeSort(), ;f%|3-q1[
new ImprovedMergeSort(), p&3> `C
new HeapSort() I/s.xk_i
}; J22rv(
'29WscU
public static String toString(int algorithm){ ;$!I&<)
return name[algorithm-1]; a%K}j\M
} )HVcG0H1
Tsz NlRxc
public static void sort(int[] data, int algorithm) { jA`a/vWu
impl[algorithm-1].sort(data); W_<4WG
} iBvOJs
arj$dAW
public static interface Sort { Q}P-$X+/ n
public void sort(int[] data); j Z'&0x"U
} - L~Uu^o
l3J$md|f
public static void swap(int[] data, int i, int j) { ;~/4d-
int temp = data; a[C&e,)}
data = data[j]; "!q?P" @C
data[j] = temp; bK=c@GXS
} PDC]wZd/
} -g~~]K%