[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; C>SOd]
} ^'fgQyj
int i1=l; y>)c?9X
int i2=mid+1; Y?L>KiM$
for(int cur=l;cur<=r;cur++){ _]{LjJ!M
if(i1==mid+1) (H\ `/%Bp
data[cur]=temp[i2++]; hDQk zqW
else if(i2>r) $VhY"<
data[cur]=temp[i1++]; &9"Y:),
else if(temp[i1] data[cur]=temp[i1++]; f>|<5zm#<
else _ {6l}
data[cur]=temp[i2++]; LF#[$ so{i
} B#cN'1c
} 8H`L8: CM
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} 5=%KK3
iio-RT?!
改进后的归并排序: Kmw #Q`
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package org.rut.util.algorithm.support; *z.rOY= 8
}D.\2x(J
import org.rut.util.algorithm.SortUtil; X5)(,036
SpYmgL?wJ
/** FZIC|uz
* @author treeroot i%, 't
* @since 2006-2-2 xLfv:Rp
* @version 1.0 K\59vtga
*/ #=;vg
public class ImprovedMergeSort implements SortUtil.Sort { /Gn0|]KI
X{<taD2~
private static final int THRESHOLD = 10; )dh`aQ%N "
RD=V`l{Z
/* Hsd76z#8
* (non-Javadoc) upX@8WxR
* c((bUjS'=Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lJdYR'/Wd
*/ j; R20xf0
public void sort(int[] data) { B|,d
int[] temp=new int[data.length]; 3s67)n
mergeSort(data,temp,0,data.length-1); $15H_X*!
} ael] {'h]
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private void mergeSort(int[] data, int[] temp, int l, int r) { \CVHtV
int i, j, k; "a3?m)
int mid = (l + r) / 2; H8=:LF
if (l == r) R/kJUl6HEl
return; /lh1sHgD
if ((mid - l) >= THRESHOLD) WtaOf_
mergeSort(data, temp, l, mid); `j!_tE`
else E.+%b;Eqe
insertSort(data, l, mid - l + 1); 9NNXj^7
if ((r - mid) > THRESHOLD) i5&,Bpfo-
mergeSort(data, temp, mid + 1, r); uG +ZR: _
else M&<qGV$A
insertSort(data, mid + 1, r - mid); Px9 K
;(A-
for (i = l; i <= mid; i++) { scYqU7$%T
temp = data; 6:6A"A
} YDj5+'y
for (j = 1; j <= r - mid; j++) { 08D:2 z1z
temp[r - j + 1] = data[j + mid]; FSAX,Y
} C"%B>e
int a = temp[l]; (|rf>=B+H
int b = temp[r]; /oLY\>pD
for (i = l, j = r, k = l; k <= r; k++) { MLg{Y?@
if (a < b) { _[-W*,xJ)
data[k] = temp[i++]; kytHOn#
a = temp; C'R6mz%Q?
} else { |0?v4%g
data[k] = temp[j--]; ]61HQ
b = temp[j]; T,rRE7
} x5V))~Ou
} GZKYRPg
} Yyr9Kj:
-A=3W3:C
/** "v(pluN|
* @param data VaGQre
* @param l ICr.Gwe3_
* @param i 6}!1a?X
*/ aM(#J7;
private void insertSort(int[] data, int start, int len) { P=6d<no&<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G_,9h!e
} 6-0sBB9=u
} )9[u*|+
} )tnbl"0
} 4y?n62N8$
C/#pK2xY
堆排序： 'Cz*p,
jD}h`(bE
package org.rut.util.algorithm.support; S'kgpF"bm
O`"~AY&
import org.rut.util.algorithm.SortUtil; +!E9$U>6%
]!@=2kG4
/** RA[%8Rh)
* @author treeroot 12m-$/5n+
* @since 2006-2-2 Uzc p
* @version 1.0 u[Si=)`VPk
*/ `JpFqZ'58
public class HeapSort implements SortUtil.Sort{ 6vR6=@(`>
}qhYHC
/* (non-Javadoc) -aS@y.z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QB!_z4UJ_;
*/ o 9/,@Ri\5
public void sort(int[] data) { c5b}q@nH
MaxHeap h=new MaxHeap(); ,\cV,$
h.init(data); i$Kx@,O8t
for(int i=0;i h.remove(); / o I 4&W
System.arraycopy(h.queue,1,data,0,data.length); /3K)$Er
} 19c_=$mV
&qWB\m
private static class MaxHeap{ >]ZE<.
P}UxA!
void init(int[] data){ H9_iTGBQ
this.queue=new int[data.length+1]; 2f@Cy+W'[
for(int i=0;i queue[++size]=data; m'"H1~BW
fixUp(size); l>`66~+s,`
} 9__B!vw:
} 79@CO6
B{D4.!a
private int size=0; a:`<=^:4,
D GcpYA.7'
private int[] queue; 0B!(i.w
ipg`8*My
public int get() { EU%v |]
return queue[1]; cz/cY:o)
} b1jDbiH&
k ,+,,W
public void remove() { PnInsf%;
SortUtil.swap(queue,1,size--); vmrs(k "d#
fixDown(1); {*TB }Xsr,
} -m=A1~|7
file://fixdown m"'LT0nur
private void fixDown(int k) { US(RWXyg
int j; w0oTV;yh
while ((j = k << 1) <= size) { CEaAtAM
if (j < size %26amp;%26amp; queue[j] j++; E;x-O)(&
if (queue[k]>queue[j]) file://不用交换 vYb4&VV
break; Xq03o#-p+
SortUtil.swap(queue,j,k); nKS*y*
k = j; l~f3J$OkJ
} 4g8o~JI:v
} =E%@8ZbK
private void fixUp(int k) { adIrrK
while (k > 1) { zIu/!aw
int j = k >> 1; *jWh4F,
if (queue[j]>queue[k]) f$kbb6juL
break; n8=Dzv0
SortUtil.swap(queue,j,k); 8IQ}%|lN
k = j; +hr|$
} l!Xj UnRF
} +~aIT=i3
`PL}8ydZ
} N>"L2E=z$|
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} *AW v
wv."
SortUtil： ^uN[rHZ*u
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package org.rut.util.algorithm; 3en67l
l5Ko9CG
import org.rut.util.algorithm.support.BubbleSort; d~%7A5
import org.rut.util.algorithm.support.HeapSort; y*{zX=]l<
import org.rut.util.algorithm.support.ImprovedMergeSort; gN:F50
import org.rut.util.algorithm.support.ImprovedQuickSort; 7x>^ip"7
import org.rut.util.algorithm.support.InsertSort; Q2r[^Z
import org.rut.util.algorithm.support.MergeSort; zEtsMU
import org.rut.util.algorithm.support.QuickSort; aK;OzB)
import org.rut.util.algorithm.support.SelectionSort; {}k3nJfE
import org.rut.util.algorithm.support.ShellSort; k?&GL!?
%A'mXatk
/** Xm>zT'B_tJ
* @author treeroot YW&K,)L@
* @since 2006-2-2 OObAn^bt
* @version 1.0 gjN'D!'E1D
*/ JZ`h+fAt
public class SortUtil { g=Xy{Vm
public final static int INSERT = 1; UCfouQCj
public final static int BUBBLE = 2; W}TP(~x'N
public final static int SELECTION = 3; (?R!y -
public final static int SHELL = 4; Uoe;=P@
public final static int QUICK = 5; P658 XKE
public final static int IMPROVED_QUICK = 6; -sKtT 9o
public final static int MERGE = 7; *nJ,|T
public final static int IMPROVED_MERGE = 8; 7`t"fS
public final static int HEAP = 9; >| ,`E
_v0iH
public static void sort(int[] data) { E]/2u3p
sort(data, IMPROVED_QUICK); .x,y[/[[)
} OzrIiahz/
private static String[] name={ u%z'.#r;a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 76@W:L*J$J
}; `G\Gk|4;2
0{z8pNrc
private static Sort[] impl=new Sort[]{ QJ(%rvn3
new InsertSort(), %\sE\]K
new BubbleSort(), YCltS!k
new SelectionSort(), d[,Rgdd@I
new ShellSort(), Sv/P:r _
new QuickSort(), K'J_AMBL
new ImprovedQuickSort(), I@6+AU~,6
new MergeSort(), v9Ii8{ca|
new ImprovedMergeSort(), pMHl<HH
new HeapSort() \zg R]|
}; eg}g}a
'vVWUK956
public static String toString(int algorithm){ iD|~$<9o
return name[algorithm-1]; '%ilF1#
} bS~Y_]B
b:hta\%/2
public static void sort(int[] data, int algorithm) { ydO+=R0M
impl[algorithm-1].sort(data); EF\OM?R
} WXmfh
T\.(e*hC
public static interface Sort { QCZ88\jX[
public void sort(int[] data); GLecBF+>F
} ;xz_H$g
1-?i*C
public static void swap(int[] data, int i, int j) { "J+L]IC?AD
int temp = data; "0jwCX Cu
data = data[j]; Q%d%Io\-t
data[j] = temp; ;k`51=Wi
} !;*flr`/
} Xzg >/w 8J