[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; Y|J\,7CM
} |pJ)w
int i1=l; &| %<=\
int i2=mid+1; .lfKS!m2
for(int cur=l;cur<=r;cur++){ ud K)F$7
if(i1==mid+1) 'v^CA}
data[cur]=temp[i2++]; c[]_gUp8
else if(i2>r) ; >3q@9\D
data[cur]=temp[i1++]; i(9=` A}
else if(temp[i1] data[cur]=temp[i1++]; e&f9/rfx
else ~lMw*Qw^
data[cur]=temp[i2++]; "bAkS}(hB(
} 43pQFDWa
} <=8REA?
6k;__@B,
} LRBcW;.Su
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改进后的归并排序: x[7jm"Pz
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package org.rut.util.algorithm.support; edhNQWn
`e]L.P_e?
import org.rut.util.algorithm.SortUtil; v4!zB9d
g\&[;v i
/** _ngyai1
* @author treeroot ?)x>GB(9ZN
* @since 2006-2-2 !YL|R[nDH|
* @version 1.0 ([zt}uf
*/ DGr{x}Kq
public class ImprovedMergeSort implements SortUtil.Sort { \B"5 Kp<
Z<ozANbk
private static final int THRESHOLD = 10; oK&LYlU
S(](C
/* $5y%\A
* (non-Javadoc) %pgie"k
* tLe!_p)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q=J"#EFs
*/ !7!xJ&/V
public void sort(int[] data) { 8;;!2>N
int[] temp=new int[data.length]; uZ( I|N$
mergeSort(data,temp,0,data.length-1); (&0%![j&
} A_1cM#4
%)T>Wn%b]v
private void mergeSort(int[] data, int[] temp, int l, int r) { |cStN[97%
int i, j, k; }$3eRu +
int mid = (l + r) / 2; 6 ]W!>jDc
if (l == r) wXp A1,i
return; IW3ZHmrpA
if ((mid - l) >= THRESHOLD) ]&\HAmOQS
mergeSort(data, temp, l, mid); 4k_&Q?1
else 5bM/ v
insertSort(data, l, mid - l + 1); Zpg/T K
if ((r - mid) > THRESHOLD) -_Pd d[M
mergeSort(data, temp, mid + 1, r); Qk<W(
else o9G%KO&;D,
insertSort(data, mid + 1, r - mid); L^} Z:I
0F-X.Dq
for (i = l; i <= mid; i++) { 1C\OL!@L
temp = data; D_ xPa
} lxy_O0n
for (j = 1; j <= r - mid; j++) { |t*(]U2O0
temp[r - j + 1] = data[j + mid]; t m?[0@<s
} n"8vlNeW
int a = temp[l]; IY6DZP
int b = temp[r]; 24PEt%2
for (i = l, j = r, k = l; k <= r; k++) { c^vPd]Ed
if (a < b) { \"B?'Ep;
data[k] = temp[i++]; 7l> |G,[c
a = temp; D].!u{##
} else { T:q_1W?h]
data[k] = temp[j--]; YO7Y1(`
b = temp[j]; Wr Ht
} zWpJ\/k~
} Kk1591'
} !spp*Q)#\
^%|,G:r
/** OQMkpX-dH
* @param data I&~kwOP
* @param l J$
* @param i `<!Nk^2ap
*/ j_*$Avy
private void insertSort(int[] data, int start, int len) { JP`$A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rF:C({y
} z(2pl}
} <+UEM~)
} 4Gs#_|!
} yQE|FbiA
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堆排序： O*{<{3
lo*OmAF
package org.rut.util.algorithm.support; \7PPFKS
Q\Dx/?g!vx
import org.rut.util.algorithm.SortUtil; r!SMF]?SJ
D+ mZ7&L
/** 2g~qVT,
* @author treeroot RUqN,C,m5I
* @since 2006-2-2 i'9aQi"G
* @version 1.0 >p#`%S
*/ %jz]s4u$5j
public class HeapSort implements SortUtil.Sort{ 0fwmQ'lW(
LVKvPi
/* (non-Javadoc) 2g5i3C.q$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HA&7 ybl
*/ Jb~$Vrdy
public void sort(int[] data) { H'k$<S
MaxHeap h=new MaxHeap(); Y,Dd}an
h.init(data); 3qJOE6[}%
for(int i=0;i h.remove(); hw! l{yv
System.arraycopy(h.queue,1,data,0,data.length); /ivcqVu]
} _R&mN\ey5
`i5U&K. 7
private static class MaxHeap{ .GcIwP'aU-
^hq+ L^$^
void init(int[] data){ |/<,71Ae
this.queue=new int[data.length+1]; %B?@le+%
for(int i=0;i queue[++size]=data; ws8@yr<R
fixUp(size); abiZ"?(
} j8n_:;i*
} t80s(e
_5TSI'@.4
private int size=0; e$]`
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private int[] queue; HT&CbEa4'
& $E[l'
public int get() { uQh dg4
return queue[1]; \7rAQ[\#V
} .nN=M>#/
4x7(50hp#
public void remove() { 6. N?=R
SortUtil.swap(queue,1,size--); iUSP+iC,
fixDown(1); *69{#qN
} -e<d//>
file://fixdown k(LZ,WSR
private void fixDown(int k) { ^X-3YhJ4U
int j; <xpOi&l
while ((j = k << 1) <= size) { R_9&V!fl
if (j < size %26amp;%26amp; queue[j] j++; S(NH# ^
if (queue[k]>queue[j]) file://不用交换 y/=:F=H@w
break; :})(@.H
SortUtil.swap(queue,j,k); yg({g "
k = j; m$<LO%<~p
} HYVSi3[
} \:]
private void fixUp(int k) { x{K^u"
while (k > 1) { hojP3 [
int j = k >> 1; ]xGo[:k|E
if (queue[j]>queue[k]) 5ncjv@Aa
break; l{b<rUh5W
SortUtil.swap(queue,j,k); s18o,Zs'
k = j; lGrp^
} fH#yJd2?f
} :QKxpHi
t~5m[C[`w
} +m?;,JGt
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} <Z{pjJ/
N>h/!# ZC
SortUtil： #yNSQd
Br/qOO:n$}
package org.rut.util.algorithm; 6oTWW@
_N8Tu~lqV
import org.rut.util.algorithm.support.BubbleSort; J|*Z*m
import org.rut.util.algorithm.support.HeapSort; /$NDH]a
import org.rut.util.algorithm.support.ImprovedMergeSort; % mP%W<
import org.rut.util.algorithm.support.ImprovedQuickSort; '{]1!yMh
import org.rut.util.algorithm.support.InsertSort; E/bIq}R6
import org.rut.util.algorithm.support.MergeSort; K:!){a[
import org.rut.util.algorithm.support.QuickSort; Xge]3Ub
import org.rut.util.algorithm.support.SelectionSort; =BD}+(3
import org.rut.util.algorithm.support.ShellSort; %=p:\+`VI
?O(@BT
/** BR&T,x/d
* @author treeroot ]5(T{
* @since 2006-2-2 'I$-h<W
* @version 1.0 8:#\g
*/ pe^hOzVv
public class SortUtil { (EW<Ggi
public final static int INSERT = 1; 5>9KW7^L
public final static int BUBBLE = 2; i4<&zj})
public final static int SELECTION = 3; -,xCUG<g
public final static int SHELL = 4; :Y? L*
public final static int QUICK = 5; "ijpqI
public final static int IMPROVED_QUICK = 6; EY~b,MIL4
public final static int MERGE = 7; 4%!#=JCl
public final static int IMPROVED_MERGE = 8; (<M^C>pldf
public final static int HEAP = 9; ?yAp&Ad
+65OR'd
public static void sort(int[] data) { )1CYs4lp
sort(data, IMPROVED_QUICK); )"( ojh
} 6yDj1PI
private static String[] name={ ,m4M39MWJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JA]TO(x
}; 0!4;."S
G.j R
private static Sort[] impl=new Sort[]{ S8=Am7D]1
new InsertSort(), g/*x;d=
new BubbleSort(), m(2(Caz{
new SelectionSort(), 6d4e~F
new ShellSort(), Om%HrT
new QuickSort(), 9NUft8QB
new ImprovedQuickSort(), \R"}=7
new MergeSort(), Th!.=S{Y5
new ImprovedMergeSort(), M't~/&D#
new HeapSort() rbC4/9G\
}; J#k3iE}
cL+--$L
public static String toString(int algorithm){ Mn)>G36(
return name[algorithm-1]; Oup5LH!sW
} p#14
bxxazsj^
public static void sort(int[] data, int algorithm) { ';H"Ye:D=7
impl[algorithm-1].sort(data); "zN2+X"&
} :ik$@5wp
Z)V m,ng
public static interface Sort { 3o).8b_3g
public void sort(int[] data); aJ!(c}N~97
} +jpaBr-O#
$x5,Oen
public static void swap(int[] data, int i, int j) { b*;zdGX.A9
int temp = data; N3M:|D
data = data[j]; N+)gYb6h
data[j] = temp; ;N+ v x
} {J aulg
} /5x~3~