[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; ue4Vcf
} 0J?~N`#O|
int i1=l; Y' %^NP}o
int i2=mid+1; G?EoPh^m
for(int cur=l;cur<=r;cur++){ (yF:6$:#
if(i1==mid+1) zA$k0p
data[cur]=temp[i2++]; N['qgO/
else if(i2>r) l^|UCgRn
data[cur]=temp[i1++]; Sz^ veh?
else if(temp[i1] data[cur]=temp[i1++]; @\|_
else R_sr?V|"
data[cur]=temp[i2++]; `8^TTQ
} CjlKMbnBH
} h3bff#<K
cWi}V
} T(f/ ?_%
Po ZuMF
改进后的归并排序: -u2P ?~
SS$[VV
package org.rut.util.algorithm.support; {DU`[:SQZg
oASY7k_3
import org.rut.util.algorithm.SortUtil; }emN9Rj
x|mqL-Q f
/** |&FkksNAl\
* @author treeroot Z8rvWH9
* @since 2006-2-2 -7S g62THS
* @version 1.0 { jhr<
*/ VY~yg*
public class ImprovedMergeSort implements SortUtil.Sort { +6';1Nb@
&K.?p2$X
private static final int THRESHOLD = 10; (vb SM}P
}oL'8-y
/* ~ ip,Nl
* (non-Javadoc) S-k8jm
* #a<Gxj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VH+%a<v"
*/ bsB*533
public void sort(int[] data) { :/Q
int[] temp=new int[data.length]; \~fONBY
mergeSort(data,temp,0,data.length-1); {5F-5YL+>
} ^ q<v{_
pL{U `5S
private void mergeSort(int[] data, int[] temp, int l, int r) { OU8Lldt
int i, j, k; Wzw7tLY._
int mid = (l + r) / 2; ,QcF|~n
if (l == r) 8>0e*jC
return; +xrr?g
if ((mid - l) >= THRESHOLD) f ` R/ i
mergeSort(data, temp, l, mid); <4P4u*/o
else E=>FjCsu<-
insertSort(data, l, mid - l + 1); .ox8*OO<
if ((r - mid) > THRESHOLD) D'J0wT#
mergeSort(data, temp, mid + 1, r); gLy&esJl1
else m06ALD_
insertSort(data, mid + 1, r - mid); 3wC' r
:.$3vaZ@
for (i = l; i <= mid; i++) { }[4r4 1[
temp = data; ~g5[$r-u-u
} 6"~P/\jP
for (j = 1; j <= r - mid; j++) { 8P1=[i]
temp[r - j + 1] = data[j + mid]; ',:*f8Jk
} `[W[H(AjQ
int a = temp[l]; P*I}yPeb
int b = temp[r]; EL(nDv
for (i = l, j = r, k = l; k <= r; k++) { 1IZ3=6
if (a < b) { MBqt&_?K
data[k] = temp[i++]; JwAYG5W
a = temp; fp+gyTnd3
} else { H[S%J3JI
data[k] = temp[j--]; qYlhlHD
b = temp[j]; T~Gvp0r}h
} U-R6xxPZ
} `QyO`y=?[Y
} {&\jW!&n
=5kY6%E7c
/** Mz~M3$$9n
* @param data OoA|8!CFa
* @param l aFS,GiB
* @param i Q$="_y2cTA
*/ hM{{\yZS
private void insertSort(int[] data, int start, int len) { YgUvOyaQXf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5u*-L_
} 'H \9:7
} 4:r!|PJn{G
} HbXPok
} |Z=^`J
qI~xlW
堆排序： Tl2C^j
&(xH$htv1
package org.rut.util.algorithm.support; i 7x7xtq
L{h%f4Du#
import org.rut.util.algorithm.SortUtil; vTlwRG=5
L#+q]j+
/** 0tEYU:Qu
* @author treeroot my4giC2a
* @since 2006-2-2 E0MGRI"me
* @version 1.0 _nbBIaHN{
*/ `C$:Yf]%nG
public class HeapSort implements SortUtil.Sort{ bO'Sgc[]
i`dCG[
/* (non-Javadoc) w*oQ["SL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~TSy<t~%-
*/ gx\&_)w N
public void sort(int[] data) { Il= W,/y
MaxHeap h=new MaxHeap(); 7z!tKs"TMT
h.init(data); K }Vv4x1U
for(int i=0;i h.remove(); B[Zjfc
System.arraycopy(h.queue,1,data,0,data.length); ~%SH3$
} C4~;yhz
}Rz3<eON
private static class MaxHeap{ eC[$B99\
kH]yl 2
void init(int[] data){ fO0XA"=
this.queue=new int[data.length+1]; +eFFSt
for(int i=0;i queue[++size]=data; y5do1Z
fixUp(size); <iH`rP#
} ^OstR`U3
} K)Q]a30
<xgTS[k
private int size=0; PzA|t;*
~~SwCXZ+b^
private int[] queue; Y6Lf@}2(i
XVvK2(
public int get() { k;w- E
return queue[1]; .)<(Oj|4
} 34d3g
LAd\Tvms
public void remove() { ,0hA'cp
SortUtil.swap(queue,1,size--); <-,gAk)u
fixDown(1); N(y\dL=v
} u"d~!j1
file://fixdown AO=h 23ZI
private void fixDown(int k) { *T~Ve;3h;
int j; ub;ZtsM,%
while ((j = k << 1) <= size) { 8"fD`jtQ
if (j < size %26amp;%26amp; queue[j] j++; /XhIx\40l
if (queue[k]>queue[j]) file://不用交换 WnGGo'Z
break; }jVSlCF@t
SortUtil.swap(queue,j,k); /4vG3
k = j; :1iqT)&|8F
} wYQ&C{D%
} tb$LriN
private void fixUp(int k) { brdmz}
while (k > 1) { 0 0M@
int j = k >> 1; m"o ;L3
if (queue[j]>queue[k]) q~*t@
break; V}SBuQp"
SortUtil.swap(queue,j,k); -eN\ !
k = j; sK7+Q
} OujCb^Rm
} 'rr^2d]`ST
il \$@Bn
} j& <i&
6Qx#%,U^ J
} 8'f4 Od ?
IiZ&Pr
SortUtil： I+dbZBX
FKT1fv[H
package org.rut.util.algorithm; ;uW}`Q<
tPGJ<30
import org.rut.util.algorithm.support.BubbleSort; rwG CUo6Z
import org.rut.util.algorithm.support.HeapSort; 86\S?=J-b
import org.rut.util.algorithm.support.ImprovedMergeSort; {WPobP"
import org.rut.util.algorithm.support.ImprovedQuickSort; l?Fb ='#
import org.rut.util.algorithm.support.InsertSort; @)-$kk*
import org.rut.util.algorithm.support.MergeSort; y^}6!>Ou:
import org.rut.util.algorithm.support.QuickSort; ^8@Iyh
import org.rut.util.algorithm.support.SelectionSort; |'{zri|A"
import org.rut.util.algorithm.support.ShellSort; aMvI?y {
V2i@.@$j
/** _<NMyRJo
* @author treeroot W~p/,HcM
* @since 2006-2-2 aOiR l,
* @version 1.0 tc!wLnhG
*/ m/qbRk68s
public class SortUtil { /Ne<V2AX
public final static int INSERT = 1; NN1$'"@NL
public final static int BUBBLE = 2; 6+KHQFb&N
public final static int SELECTION = 3; R#DwF,
public final static int SHELL = 4; 5GPo*Qpl
public final static int QUICK = 5; K!]1oy'V
public final static int IMPROVED_QUICK = 6; M>>qn_yq4
public final static int MERGE = 7; ,i,q!M{-
public final static int IMPROVED_MERGE = 8; ,$ ^C4I
public final static int HEAP = 9; aN $}?
YI.w-K\
public static void sort(int[] data) { i7utKj*57
sort(data, IMPROVED_QUICK); bLd#xXl
} X0M1(BJgGo
private static String[] name={ C,pJ`:P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K a(J52
}; /M*a,o
zdEPDdB
private static Sort[] impl=new Sort[]{ }LijnHH.
new InsertSort(), LI6hEcM=
new BubbleSort(), Wf&W^Q
new SelectionSort(), BZXUwqEh
new ShellSort(), =T7A]U]
new QuickSort(), 4)<~4 '
new ImprovedQuickSort(), (Gw,2-A
new MergeSort(), }Iz7l{al
new ImprovedMergeSort(), _+^ 2^TW
new HeapSort() S9>0t0
}; =l0Jb#d
}QsZ:J.
public static String toString(int algorithm){ 2d {y M(=(
return name[algorithm-1]; sqS=qC
} XxaGp95so
~35U]s@v
public static void sort(int[] data, int algorithm) { V2<?ol
impl[algorithm-1].sort(data); yH<$k^0r*
} EgDQ+( -
-#Z bR
public static interface Sort { WzI8_uM
public void sort(int[] data); W{rt8^1
} &%_& 8DkG
@j4U^"_QB
public static void swap(int[] data, int i, int j) { Eb=#9f%y>&
int temp = data; vQa'S-@u
data = data[j]; <6G11-K
data[j] = temp; ?"KC-u|
} w1|A5q'M
} f*24)Wn<