[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; 7)PJ:4IqS
} 1 ;Ju]
int i1=l; G;2[
int i2=mid+1; p"KV*D9b
for(int cur=l;cur<=r;cur++){ h2&y<Eg>
if(i1==mid+1) Vi,Y@+4
data[cur]=temp[i2++]; Y`]rj-8f0B
else if(i2>r) ,eK2I Ao
data[cur]=temp[i1++]; i puo}
else if(temp[i1] data[cur]=temp[i1++]; IozNjII$:.
else thV Tdz
data[cur]=temp[i2++]; v$JLDt_
} @Z=wE3T@
} QRagz,c
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} fM9xy \.
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改进后的归并排序: 1)Eq&ASB
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package org.rut.util.algorithm.support; |`v^d|
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import org.rut.util.algorithm.SortUtil; @WJf)
+{0=<2(EC
/** Wbd_aR (
* @author treeroot "s;ci~$
* @since 2006-2-2 7?"9J`*
* @version 1.0 H` Lu"EK
*/ |YXG(;-BS
public class ImprovedMergeSort implements SortUtil.Sort { [)k2=67
h{H]xe[Q
private static final int THRESHOLD = 10; 5C65v:Q`N
@|'Z@>!/pV
/* wNR=?Z~
* (non-Javadoc) /gX%ABmS
* ebD{ pc`&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %\l0-RA@<
*/ &&*wmnWCS{
public void sort(int[] data) { [[$Mh_MD
int[] temp=new int[data.length]; dL(4mR8
mergeSort(data,temp,0,data.length-1); D0KELAcY
} ]eD[4Y\#t
|} 9GHjG
private void mergeSort(int[] data, int[] temp, int l, int r) { G "c/a8
int i, j, k; kw;wlFU;
int mid = (l + r) / 2; (Otur
if (l == r) g!\QIv1D
return; W7T"d4
if ((mid - l) >= THRESHOLD) _&=9Ke
mergeSort(data, temp, l, mid); XC2Q*Z
else ]Qc: Zy3
insertSort(data, l, mid - l + 1); X)y*#U
if ((r - mid) > THRESHOLD) MKe *f%
mergeSort(data, temp, mid + 1, r); I'P.K| "R
else P1e5uJkd
insertSort(data, mid + 1, r - mid); ~"\P~cg0J
.;j"+Ef
for (i = l; i <= mid; i++) { y "<JE<X
temp = data; }Uq/kei^P
} F-i&M1\_
for (j = 1; j <= r - mid; j++) { 78gob&p?
temp[r - j + 1] = data[j + mid]; eNivlJ,K|@
} <%(f9j
int a = temp[l]; 7%X+O8
int b = temp[r]; fA;x{0CAMX
for (i = l, j = r, k = l; k <= r; k++) { %va[jJ
if (a < b) { U<|B7t4M
data[k] = temp[i++]; "hfw9Qm
a = temp; : qr}M
} else { @!Y.935/0
data[k] = temp[j--]; ?!rU |D
b = temp[j]; `c>A>c|
} Aw5K3@Ltz
} QZz&1n
} nWd:>Ur
"NlRSc#
/** $F<%Jl7_Z
* @param data qP@L(_=g
* @param l ~y`Pwj
* @param i -\5[Nq{N
*/ Z#%}K Z
private void insertSort(int[] data, int start, int len) { "rL"K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sw/J+FO2
} A<]&JbIt
} j`Tm\!q
} #dL5x{gV=
} uTxX`vH@!
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堆排序： PZ~`O
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package org.rut.util.algorithm.support; n&3iz05}
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import org.rut.util.algorithm.SortUtil; u87=q^$
rGGS]^
/** uT#Acg
* @author treeroot oXvdR(Sb^
* @since 2006-2-2 ik8|9m4/
* @version 1.0 (q0No26;(
*/ 3#7ENV`
public class HeapSort implements SortUtil.Sort{ {-~05,zE
}3LBbG0Bw
/* (non-Javadoc) +0pgq (
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hYs82P|2Ol
*/ ?=TL2"L
public void sort(int[] data) { +!D=SnBGs
MaxHeap h=new MaxHeap(); tuX =o
h.init(data); `"i^'VL,
for(int i=0;i h.remove(); EolE?g@l8
System.arraycopy(h.queue,1,data,0,data.length); B!$V\Gs
} cu)@P0I
[%HYh7ua<
private static class MaxHeap{ ' }y]mFpF
9<+;hH8J_r
void init(int[] data){ vQ?MM&6
this.queue=new int[data.length+1]; h2im sjf
for(int i=0;i queue[++size]=data; Zb12:?
fixUp(size); oUnq"]
} -Y5YCY!`
} d<e+__2
uZo]8mV
private int size=0; U&tfl/
_Ac/ir[,:
private int[] queue; WK/b=p|#o
7*R{u*/e
public int get() { DKe6?PG
return queue[1]; ay!6T`U`
} kxt\{iy4
|_xZ/DT
public void remove() { ]b5%?^Z#
SortUtil.swap(queue,1,size--); m~A[V,os
fixDown(1); R (+h)#![
} =vB]*?;9
file://fixdown PT 0Qzg
private void fixDown(int k) { F5:2TEA
int j; T)$6H}[c
while ((j = k << 1) <= size) { Z1XUYe62
if (j < size %26amp;%26amp; queue[j] j++; R!:eYoQ
if (queue[k]>queue[j]) file://不用交换 OqAh4qa,$
break; ]<&B BQ
SortUtil.swap(queue,j,k); @]?? +f}#
k = j; :mCw.Jz<h
} LZ=wz.'u
} <(u3+`f1s
private void fixUp(int k) { G_4K+ -K
while (k > 1) { #"3[f@|e
int j = k >> 1; T%;k%
if (queue[j]>queue[k]) ]{q-Y<{"
break; GqmDDL1
SortUtil.swap(queue,j,k); tal>b]B;
k = j; y@2vY[)3s
} #U\&i`
} Huc3|~9
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} j3sz*:
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} r_!{!i3B
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SortUtil： Zpn*XG
Y&1!Z*OL;
package org.rut.util.algorithm; @'k,\$/
:V5!C$QV
import org.rut.util.algorithm.support.BubbleSort; wI1M0@}PV
import org.rut.util.algorithm.support.HeapSort; &sr:\Qn X/
import org.rut.util.algorithm.support.ImprovedMergeSort; PU]7c2.y
import org.rut.util.algorithm.support.ImprovedQuickSort; 5p#o1I
import org.rut.util.algorithm.support.InsertSort; iZDb.9@&t
import org.rut.util.algorithm.support.MergeSort; !>a&`j2:W
import org.rut.util.algorithm.support.QuickSort; 8o%<.]
import org.rut.util.algorithm.support.SelectionSort; df21t^0/
import org.rut.util.algorithm.support.ShellSort; H`+]dXLB
r-1yJ
/** B^_$ hJncc
* @author treeroot A$H+4L
* @since 2006-2-2 gavQb3EP
* @version 1.0 p3,(*eZ
*/ n;S0fg
public class SortUtil { eY6gb!5u
public final static int INSERT = 1; @SF")j|
public final static int BUBBLE = 2; ^-csi
public final static int SELECTION = 3; /:*R -VdF
public final static int SHELL = 4; n##w[7B*
public final static int QUICK = 5; /jK17}j
public final static int IMPROVED_QUICK = 6; it/C y\f
public final static int MERGE = 7; ]XpU'/h>q;
public final static int IMPROVED_MERGE = 8; }R(0[0NQe-
public final static int HEAP = 9; ~]6Oz;~<3
0IT20.~
public static void sort(int[] data) { fmZzBZ_
sort(data, IMPROVED_QUICK); Q9x` Uy
} MZ|c7f&`
private static String[] name={ jiw`i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n41\y:CAo
}; {$u@6& B
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private static Sort[] impl=new Sort[]{ FzsS~C$wH{
new InsertSort(), K_<lO,[S
new BubbleSort(), Bcd0
new SelectionSort(), Hm8EYPrJ
new ShellSort(), Gr"2G,,VI
new QuickSort(), wFoR,oXtL/
new ImprovedQuickSort(), U#FJ8CD&u
new MergeSort(), f4aD0.K.g|
new ImprovedMergeSort(), .eDxIWW+ft
new HeapSort() rt\<nwc
}; r,Y/4(.c7U
+^]PBMM1w
public static String toString(int algorithm){ 8YJqM,t5)
return name[algorithm-1]; q9a wzj
} B9;,A;E};
9cw4tqTm
public static void sort(int[] data, int algorithm) { =Y=^]ayO/
impl[algorithm-1].sort(data); ?[L0LL?ce
} Jb)eC?6O
@]VvqCk
public static interface Sort { y!{/'{?P
public void sort(int[] data); #Ko+_Hm?4
} 40l#'< y;
S9ak '
public static void swap(int[] data, int i, int j) { 9{]r+z:
int temp = data; ay7+H7^|hZ
data = data[j]; *{D:1S
data[j] = temp; !tFU9Zt
} V"Y Fu^L
} |0vHy7CE