[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; Uk-HP\C"7
} BGjb`U#%3
int i1=l; X_70]^XL
int i2=mid+1; mPmB6q%)]
for(int cur=l;cur<=r;cur++){ R.7#zhC`4
if(i1==mid+1) a%~yol0wO7
data[cur]=temp[i2++]; Z|`fHO3j
else if(i2>r) 6d{j0?mM
data[cur]=temp[i1++]; 4S *,\q]q
else if(temp[i1] data[cur]=temp[i1++]; DcFCKji
else b4~H3|
data[cur]=temp[i2++]; _F8T\f|
} LC'2q*:'
} ( D}"&2
$ly0h W
} u3wL<$2[8
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改进后的归并排序: vbn>mg5
cjg=nTsBA
package org.rut.util.algorithm.support; (G5xkygR9
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import org.rut.util.algorithm.SortUtil; BQ#jwu0e
MCAXt1sL&E
/** B/Ba5z"r$
* @author treeroot 4Vx+[8W
* @since 2006-2-2 Bz]J=g7
* @version 1.0 deM~[1e[
*/ l @A"U)A(
public class ImprovedMergeSort implements SortUtil.Sort { MxN]7
Cj$H[K}>
private static final int THRESHOLD = 10; 2k3 z'RLG
WLy7'3@
/* l%bq2,-%
* (non-Javadoc) 4qBY%1
* f%1wMOzx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M,L@k
*/ kv%)K'fU4
public void sort(int[] data) { U]j&cFbn5_
int[] temp=new int[data.length]; L{K*~B-p
mergeSort(data,temp,0,data.length-1); 5V rcR=?O
} X)NWX9^;'
s7Qyfe&>
private void mergeSort(int[] data, int[] temp, int l, int r) { XbXgU#%
int i, j, k; mdt ?:F4Q
int mid = (l + r) / 2; s'AQUUrb<
if (l == r) G,/Gq+WX
return; n%U9iwJ.
if ((mid - l) >= THRESHOLD) cqHw^{'8
mergeSort(data, temp, l, mid); 9T]va]w?#
else 2q|_Dma
insertSort(data, l, mid - l + 1); <mn-=#)
if ((r - mid) > THRESHOLD) "9u-lcQ\
mergeSort(data, temp, mid + 1, r); 1YFAr}M
else ty9rH=1
insertSort(data, mid + 1, r - mid); A<;0L . J
eAU"fu6d
for (i = l; i <= mid; i++) { _AAx )
temp = data; >T(M0Tkt
} ],$6&Cm
for (j = 1; j <= r - mid; j++) { (S3jZ
temp[r - j + 1] = data[j + mid]; i~ROQMN1
} SUSc
int a = temp[l]; TLX^~W[gOm
int b = temp[r]; KdS eCeddW
for (i = l, j = r, k = l; k <= r; k++) { d[yrNB6|
if (a < b) { @<VG8{
data[k] = temp[i++]; [gTQ-
a = temp; _RgxKp/d
} else { 0\QYf0o
data[k] = temp[j--]; |@OJ~5H/{
b = temp[j]; O&F<oM
} a{5H33JA
} kzW\z4f
} \8 g.
1k0^6gE|
/** xqU^I5Z
* @param data -fhAtxkg
* @param l 'wegipK~R
* @param i QZqpF9Eu
*/ ZyZl\\8U
private void insertSort(int[] data, int start, int len) { W&WB@)ie
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S|s3}]g9
} }#YIl@E
} %+/f'6kR
} xAFek;GY?
} fYv ;TV>73
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堆排序： !2/l9SUi
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package org.rut.util.algorithm.support; =lYvj
UU*0dSWr
import org.rut.util.algorithm.SortUtil; tbL1g{Dz,
X9p+a,
/** aA7S'[NjB
* @author treeroot 5ENov!$H
* @since 2006-2-2 N+ak[axN
* @version 1.0 y-D>xV)n
*/ F%w\D9+P
public class HeapSort implements SortUtil.Sort{ 6(!,H<bON
j*zB { s K
/* (non-Javadoc) c-? Ygr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l!xgtP K
*/ bEBZ!ghU
public void sort(int[] data) { /5Gnb.zN)
MaxHeap h=new MaxHeap(); $%lHj+(
h.init(data); {mKpD
for(int i=0;i h.remove(); *Cc$eR]-
System.arraycopy(h.queue,1,data,0,data.length); qpH j4
} j 8~Gv=(h
/DgT1^&0
private static class MaxHeap{ (gs`=H*d;
_N[^Hl`\
void init(int[] data){ o{s4.LKK
this.queue=new int[data.length+1]; W\d0
for(int i=0;i queue[++size]=data; ^XjvJa
fixUp(size); j@kRv@
} 0j-F6a*p'1
} VQZT.^
bQ${8ZO
private int size=0; Udb0&Y1^
7lnM|nD
private int[] queue; o.v,n1Nm
Q*TQ*J7".X
public int get() { ]~4}(\u
return queue[1]; 0TuNA\Ug+
} $~;6hnrm
_R>s5|_
public void remove() { ?STI8AdO
SortUtil.swap(queue,1,size--); fSgGQ D4
fixDown(1); IJL^dXCu
} [kU[}FT
file://fixdown 7KYF16A4
private void fixDown(int k) { uWM4O@Qn)d
int j; g[uE@Gaj&
while ((j = k << 1) <= size) { x<)!$cg
if (j < size %26amp;%26amp; queue[j] j++; ?CL z@u~
if (queue[k]>queue[j]) file://不用交换 _&8KB1~
break; -NI@xJO4(;
SortUtil.swap(queue,j,k); &**.naSo
k = j; i&AXPq>`
} exa}dh/uC
} j[Hg]
private void fixUp(int k) { DVeF(Y3&
while (k > 1) { @Reh?]# v
int j = k >> 1; $P1d#;rb%
if (queue[j]>queue[k]) -v/?>
break; AmrJ_YP/t~
SortUtil.swap(queue,j,k); 3oNt]2w/'
k = j; {/,+_E/
} wE.@0
} noD7G2o
Tk2&{S"
} 8tB{rK,
NR@SDW
} Xj(k(>7V
LT y@6*
SortUtil： [jG uO%
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package org.rut.util.algorithm; ir1RAmt%
Jq=>H@il
import org.rut.util.algorithm.support.BubbleSort; Qcy+ {j]
import org.rut.util.algorithm.support.HeapSort; ;_;H(%uY
import org.rut.util.algorithm.support.ImprovedMergeSort; jw6ng>9
import org.rut.util.algorithm.support.ImprovedQuickSort; j2C^1:s@m
import org.rut.util.algorithm.support.InsertSort; ^{:[^$f:l
import org.rut.util.algorithm.support.MergeSort; aNh1e^j
import org.rut.util.algorithm.support.QuickSort; <jg wdbT"6
import org.rut.util.algorithm.support.SelectionSort; jAK`96+D~b
import org.rut.util.algorithm.support.ShellSort; \)s 3]/"7
yp7,^l
/** Phjf$\pt
* @author treeroot |7 W6I$Xl
* @since 2006-2-2 >O[^\H!\
* @version 1.0 V0wC@?
*/ .(.G`aKnF
public class SortUtil { gP"Mu#/D
public final static int INSERT = 1; ABS BtH ?
public final static int BUBBLE = 2; 34&$_0zn
public final static int SELECTION = 3; '@1Qx~*]e
public final static int SHELL = 4; WLA_YMlA
public final static int QUICK = 5; RdpQJ)3F
public final static int IMPROVED_QUICK = 6; 19.!$;
public final static int MERGE = 7; ,L;c{[*rh
public final static int IMPROVED_MERGE = 8; N'W>pU
public final static int HEAP = 9; Q-3J0=
}F9?*2\/
public static void sort(int[] data) { #)c;i<Q3S
sort(data, IMPROVED_QUICK); trNK9@wT)
} -_H2FlB
private static String[] name={ ?R~Ye
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yW7S }I
}; {:q9:
#'{PYr
private static Sort[] impl=new Sort[]{ laIC}!
new InsertSort(), PT5ni6
new BubbleSort(), fn"jYSy
new SelectionSort(), E*#60z7F
new ShellSort(), "NI>HO.U
new QuickSort(), d4rJ?qw
new ImprovedQuickSort(), _}%#Yz
new MergeSort(), */@bNT9BgO
new ImprovedMergeSort(), ^IegR>
new HeapSort() [!|d[
}; !t [%'!v
BsG[#4KM:
public static String toString(int algorithm){ KARQKFp!C>
return name[algorithm-1]; LZ<(:S
} ur_"m+
ry<}DK<u
public static void sort(int[] data, int algorithm) { Ik2szXh[J
impl[algorithm-1].sort(data); N4JL.(m){I
} (VF4]
C{Xk/Er5<
public static interface Sort { 70l;**"4
public void sort(int[] data); Yka yT0!
} <EE+ S#z
4%.2=
public static void swap(int[] data, int i, int j) { yeh adm\
int temp = data; k*+ZLrT
data = data[j]; o+WrIAR
data[j] = temp; .Af)y_
} loVvr"&g
} XzwQ,+IAr