[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; l!2hwRR
} 8?qEv,W
int i1=l; eF5?4??
int i2=mid+1; RusC5\BUX
for(int cur=l;cur<=r;cur++){ Lo,z7"8
if(i1==mid+1) hK=\O)
data[cur]=temp[i2++]; ESOuDD2<
else if(i2>r) <0[{Tn
data[cur]=temp[i1++]; <:#O*Y{
else if(temp[i1] data[cur]=temp[i1++]; 1VW;[ ocQ
else AF{k^^|H
data[cur]=temp[i2++]; K`.wj8zGY
} 1](5wK-Z
} F",]*>r
7?6?`no~JJ
} )k5lA=(Yr+
/a7tg+:
改进后的归并排序: ,e"A9ik#
.y7&!a35
package org.rut.util.algorithm.support; w, 0tY=h6
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import org.rut.util.algorithm.SortUtil; KZ ezA4
VdpkE0
/** YxMOr\B
* @author treeroot ]a% *$TF
* @since 2006-2-2 T!6H5>zA
* @version 1.0 1j*I`xZ
*/ '[shY
public class ImprovedMergeSort implements SortUtil.Sort { _E5%Px5>L
QZufQRfr{
private static final int THRESHOLD = 10; fgFBOpG%Gq
'"}|'J
/* $)| l#'r
* (non-Javadoc) W(*:8}m,p
* e_J_rx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]pLQ;7f7D
*/ cmDskQ:
public void sort(int[] data) { E-,74B&H
int[] temp=new int[data.length]; ]d"4G7mu`l
mergeSort(data,temp,0,data.length-1); iKB8V<[\T
} +Q, 0kv
bhXH<=
private void mergeSort(int[] data, int[] temp, int l, int r) { .vRLK
int i, j, k; &J|3uY,'j
int mid = (l + r) / 2; 3j.Ft*SV
if (l == r) &fYx0JT
return; SdUtAC2
if ((mid - l) >= THRESHOLD) *(ex:1sW
mergeSort(data, temp, l, mid); qE6:`f
else ie$QKoE
insertSort(data, l, mid - l + 1); 8?']W\)
if ((r - mid) > THRESHOLD) HMNjQ 1y
mergeSort(data, temp, mid + 1, r); *[*#cMZ
else oS)0,p
insertSort(data, mid + 1, r - mid); zypZ3g{vz
gf+Kr02~
for (i = l; i <= mid; i++) { 5EIhCbA
temp = data; G8`q-B}q
} LGT\1u
for (j = 1; j <= r - mid; j++) { e,zR
temp[r - j + 1] = data[j + mid]; /:>f$k4~h
} Ygn"7
int a = temp[l]; 2F-!SI
int b = temp[r]; lj.z>
for (i = l, j = r, k = l; k <= r; k++) { BQf}S +
if (a < b) { ]}9cOb%I
data[k] = temp[i++]; YZ\$b=-
a = temp; !B?/6XRUx
} else { NFGC.<
data[k] = temp[j--]; Ns9cx
b = temp[j]; !U#kUj:4I
} `"[VkQFB/
} aPB %6c=
} o_U=]mEDY
9;Ezm<VQ
/** 'DF3|A],
* @param data !-r@_tn|
* @param l mLD0Lu_Ob3
* @param i zsI0Q47\
*/ T4T_32`XR
private void insertSort(int[] data, int start, int len) { '9GHmtdO,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VS^%PM#:/
} ,*0>CBJvv
} xk86?2b{)
} mKZ?H$E%%
} O7j$bxk/^
J{$C}8V
堆排序： !.L%kw7z
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package org.rut.util.algorithm.support; |LKhT4rE
.CI]8O"3y
import org.rut.util.algorithm.SortUtil; ~=%eOoZP;c
8x'rNb
/** df#DKV:
* @author treeroot pw:<a2.
* @since 2006-2-2 yyk[oH-Q
* @version 1.0 (|ga#%iI
*/ ^`YSl*:
public class HeapSort implements SortUtil.Sort{ r0QjCFSF=
FqsG#6|x
/* (non-Javadoc) 3z: rUhA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qYIBP?`g
*/ EBw}/y{Kt
public void sort(int[] data) { )aquf<u@
MaxHeap h=new MaxHeap(); BmUEo$w
h.init(data); 4cJ^L <
for(int i=0;i h.remove(); 9`.b
System.arraycopy(h.queue,1,data,0,data.length); 8nES=<rz
} n_v c}ame
'.atbl
private static class MaxHeap{ WKBPqfC
gU>Y
void init(int[] data){ a%ec: %
this.queue=new int[data.length+1]; 7H[#
for(int i=0;i queue[++size]=data; /.05rTpp
fixUp(size); QfU 0*W?r
} GfQMdLy\Z
} 5#d"]7
~n]:f7?I
private int size=0; t>&$_CSWK
ceVej'
private int[] queue; ;^}cZ
lZ^XZjwoM
public int get() { 2K, 1wqf'
return queue[1]; [$.oyjd
} H|F>BjXn5
\R&`bAdk
public void remove() { K]@6&H-b|
SortUtil.swap(queue,1,size--); 2|EHNy!
fixDown(1); BAmH2"
} 6$SsdT|8B
file://fixdown D8`,PXtV
private void fixDown(int k) { zfi{SO l
int j; M0c"wi@S_
while ((j = k << 1) <= size) { 5/:Zj,41{
if (j < size %26amp;%26amp; queue[j] j++; L4.yrA-]C%
if (queue[k]>queue[j]) file://不用交换 o [ar.+[
break; \C}tK,79
SortUtil.swap(queue,j,k); :+]6SC0ql
k = j; I$qL=
} a<!g*UVL0M
} F8b*Mt}p
private void fixUp(int k) { `mw@"
while (k > 1) { Gpe h#Q4x
int j = k >> 1; QHMXQyr(
if (queue[j]>queue[k]) ~DqNA%Mb
break; o1zc`Ibd
SortUtil.swap(queue,j,k); K* [cJcY+
k = j; 6gakopZO
} 'y-IE#!5
} uT]_pKm
5?9}^s4
} Vl^jTX5N
{!^HG+
} U@f3V8CPy
.RJvu$U2j
SortUtil： aM?7'8/
'-w G
package org.rut.util.algorithm; J5J3%6I
B+zq!+ HJ
import org.rut.util.algorithm.support.BubbleSort; c~RElL
import org.rut.util.algorithm.support.HeapSort; \FVR'A1
import org.rut.util.algorithm.support.ImprovedMergeSort; =\X<UA}
import org.rut.util.algorithm.support.ImprovedQuickSort; oH6(Lq'q
import org.rut.util.algorithm.support.InsertSort; n6Q 3X
import org.rut.util.algorithm.support.MergeSort; cY\-e?`=4
import org.rut.util.algorithm.support.QuickSort; [`ttNW(_
import org.rut.util.algorithm.support.SelectionSort; .vpQ3m>
import org.rut.util.algorithm.support.ShellSort; Qg9{<0{u
~Gwn||g78
/** gvA&F|4
* @author treeroot L>@0Nne7
* @since 2006-2-2 Fdc bmQ
* @version 1.0 1`aFL5[0$
*/ 'ARQ7 Q[`
public class SortUtil { Qt>yRt
public final static int INSERT = 1; 8VMq>-
public final static int BUBBLE = 2; .V/TVz!b
public final static int SELECTION = 3; ^o?.Rph|i]
public final static int SHELL = 4; 8{?Oi'-|0
public final static int QUICK = 5; D*D83z OzN
public final static int IMPROVED_QUICK = 6; Ih,~h[
public final static int MERGE = 7; kP8Ypw&
public final static int IMPROVED_MERGE = 8; Zls4@/\Q
public final static int HEAP = 9; ?r'b Z~
: ] Y=
public static void sort(int[] data) { lZn <v'y
sort(data, IMPROVED_QUICK); qY14LdC}~
} -pqShDar|
private static String[] name={ 'Iu$4xo`[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ypv"u0
}; /-BplU*"9
{_(;&\5
private static Sort[] impl=new Sort[]{ MIt\[EB
new InsertSort(), HCHC~FNd
new BubbleSort(), 00b )Bg
new SelectionSort(), :O//A6v
new ShellSort(), s/,St!A4!
new QuickSort(), /}M@ @W
new ImprovedQuickSort(), ZfvFs
new MergeSort(), uE5kL{Fv
new ImprovedMergeSort(), rxa8X wo8
new HeapSort() _HGDqjL
}; hrcR"OZ~X
)QI]b4[
public static String toString(int algorithm){ W&bh&KzCW
return name[algorithm-1]; 2@e<II2ha8
} Itz_;+I.Mp
NaVZ)
public static void sort(int[] data, int algorithm) { L}:u9$w
impl[algorithm-1].sort(data); 6x[gg !;85
} u:m]-'
Q3oVl^q
public static interface Sort { ?'h@!F%R'
public void sort(int[] data); =gfLl1wY[
} 38Wv&!
2]>s@?[
public static void swap(int[] data, int i, int j) { ~"=nt@M]
int temp = data; 5%4:)s{4|
data = data[j]; bcj7.rh]'h
data[j] = temp; rvr Ok
} ]MB^0:F-
} pazFVzT