[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; ta35 K"
} DwaBdN[!7
int i1=l; OglEt["
int i2=mid+1; %j:]^vqFA
for(int cur=l;cur<=r;cur++){ aO]ZZleNS
if(i1==mid+1) ge,H-8'Z
data[cur]=temp[i2++]; kY&k-K\
else if(i2>r) tR}MrM
data[cur]=temp[i1++]; I~q#eO)
else if(temp[i1] data[cur]=temp[i1++]; r;/4F/6"
else c2h{6;bfY
data[cur]=temp[i2++]; &qMPq->
} w:%o?pKet1
} hXfQ)$J
H(R1o~
} V[{6e
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改进后的归并排序: 9)y/:sO<P
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package org.rut.util.algorithm.support; Ozw;(fDaU
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import org.rut.util.algorithm.SortUtil; NhfJ30~
||T2~Q*:y
/** 8 BY j
* @author treeroot W0(_~
* @since 2006-2-2 O*eby*%h
* @version 1.0 ~"!] 3C,L
*/ AuUde$l_
public class ImprovedMergeSort implements SortUtil.Sort { Y,GU%[+
ks3`3q 7
private static final int THRESHOLD = 10; TMAJb+@l:
" W!M[qBW
/* XxT#X3D/,"
* (non-Javadoc) qd9cI&
* $$D}I*^Dt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +awW3^1Ed
*/ Da&vb D-Bg
public void sort(int[] data) { R?,an2
int[] temp=new int[data.length]; n1qQ+(xC
mergeSort(data,temp,0,data.length-1); 1q~+E\x
} 0]>u)%
l\BVS)
private void mergeSort(int[] data, int[] temp, int l, int r) { x9$` W
int i, j, k; _.>QEh5"5
int mid = (l + r) / 2; 2{]`W57_=
if (l == r) #,S0HDDHn
return; P::TO-C
if ((mid - l) >= THRESHOLD) 9iXeBC
mergeSort(data, temp, l, mid); G3{Q"^S"
else rFIqC:=
insertSort(data, l, mid - l + 1); {n(b{ibl
if ((r - mid) > THRESHOLD) ;6gDV`Twy
mergeSort(data, temp, mid + 1, r); jYx38_5e
else -#0qV:D
insertSort(data, mid + 1, r - mid); tna .52*/
@xQgY*f#
for (i = l; i <= mid; i++) { *n;!G8\
temp = data; AcS|c:3MUy
} p%iGc<vHX
for (j = 1; j <= r - mid; j++) { 3Dg,GaRk
temp[r - j + 1] = data[j + mid]; WzAb|&?
} JCz@s~f\y
int a = temp[l]; F ;{n"3<
int b = temp[r]; .EpV;xq}
for (i = l, j = r, k = l; k <= r; k++) { P#pn*L*"T
if (a < b) { E>&n.%
data[k] = temp[i++]; %dJX-sm@
a = temp; 7x#Ckep:I
} else { gG uZ8:f
data[k] = temp[j--]; <!L>Exh&r
b = temp[j]; ML:Q5 ^`
} ^=C{.{n
} ?bPRxR
} "XB[|#&
]NjX?XdX<
/** O>SLOWgha
* @param data x6(~;J
* @param l t]>Lh>G
* @param i &Q+Ln,(&L
*/ e@c0WlWa
private void insertSort(int[] data, int start, int len) { \x)n>{3C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :Mb%A
} M>DaQ`b
} kz{/(t
} 6726ac{xz
} cS>e?
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堆排序： &@%W29:
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package org.rut.util.algorithm.support; I3 .x9
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import org.rut.util.algorithm.SortUtil; e:DkGy`-s
&L#UGp$,
/** z."a.>fPaO
* @author treeroot 9U{a{~b
* @since 2006-2-2 ki[UV zd
* @version 1.0 Fkvl%n
*/ g$HwxA9Gp/
public class HeapSort implements SortUtil.Sort{ .}'qUPNR
&F\?
/* (non-Javadoc) Em?d*z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JXCCTUO
*/ }tsYJlh5
public void sort(int[] data) { "[vu6`m?
MaxHeap h=new MaxHeap(); y|CP;:f;
h.init(data); 7.C;NT
for(int i=0;i h.remove(); *4_jA](
System.arraycopy(h.queue,1,data,0,data.length); !xP8#|1
} 5Ycco,x
*&?c(JU;<
private static class MaxHeap{ HU%o6cw
m0LTx\w!
void init(int[] data){ 8d?g]DEN)6
this.queue=new int[data.length+1]; "5;;)\o~
for(int i=0;i queue[++size]=data; gT$Ju88
fixUp(size); <.pU,T/
} eAX )^q
} [PQ?#:r
7s"< 'cx_F
private int size=0; VS9`{
3BB%Z6F
private int[] queue; D!.[q-<
()K " c#
public int get() { dlJbI}-v=
return queue[1]; )_mr! z(S
} @Gx.q&H
1c<=A!"{
public void remove() { b`)){LR
SortUtil.swap(queue,1,size--); $rz=6h
fixDown(1); ':gUOra|I
} fQ/ 0R
file://fixdown hQ]H /+\
private void fixDown(int k) { JAAI_gSR3
int j; 1"/He ` 4
while ((j = k << 1) <= size) { yyv8gH
if (j < size %26amp;%26amp; queue[j] j++; I*x[:)X8
if (queue[k]>queue[j]) file://不用交换 Jj,U RD&0R
break; G"X8}:}
SortUtil.swap(queue,j,k); R<sJ^nx
k = j; t'BLVCu
} (7XCA,KTGI
} W5?yy>S6N
private void fixUp(int k) { D|rFu
while (k > 1) { dY@WI[yog
int j = k >> 1; a["2VY6Eq@
if (queue[j]>queue[k]) &krwf ]|
break; 0@G")L Ue0
SortUtil.swap(queue,j,k); b7!Qn}
k = j; r`AuvwHPs[
} RE=`
} 2kdC]|H2?
nA P.^_K
} L,mQ
PH?#)lD
} Sp7ld7c
+<xQM h8
SortUtil： }Z{=|rVE
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package org.rut.util.algorithm; ,Y|^^?'j Q
bx]N>k J
import org.rut.util.algorithm.support.BubbleSort; IX*idcxR
import org.rut.util.algorithm.support.HeapSort; X>NhZ5\
import org.rut.util.algorithm.support.ImprovedMergeSort; A-,up{g
import org.rut.util.algorithm.support.ImprovedQuickSort; ##@$|6
import org.rut.util.algorithm.support.InsertSort; ?CC"Yij
import org.rut.util.algorithm.support.MergeSort; )Psb>'X
import org.rut.util.algorithm.support.QuickSort; %^I88,$&L
import org.rut.util.algorithm.support.SelectionSort; ]l'Y'z,}
import org.rut.util.algorithm.support.ShellSort; cgl*t+o&
9AxCiT.
/** w=^`w:5X
* @author treeroot w QNxL5B
* @since 2006-2-2 Bn61AFy`
* @version 1.0 ,hq)1u
*/ ua5OGx
public class SortUtil { Kv.>Vf.T}_
public final static int INSERT = 1; .so[I
public final static int BUBBLE = 2; jy giG&H
public final static int SELECTION = 3; =+-Yxh|*
public final static int SHELL = 4; jeGj<m
public final static int QUICK = 5; ]wKzE4Z/
public final static int IMPROVED_QUICK = 6; GP&vLt51
public final static int MERGE = 7; NZ/yBOD(
public final static int IMPROVED_MERGE = 8; J9\a{c;.
public final static int HEAP = 9; 9cEv&3
F>]m3(
public static void sort(int[] data) { Mk=mT3=#
sort(data, IMPROVED_QUICK); %g1,Nk
} ^ <Pq,u%k
private static String[] name={ YnxRg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]8icBneA~'
}; |N}P(GF
H^.IY_I`U*
private static Sort[] impl=new Sort[]{ 6oLwfTy
new InsertSort(), (9<guv
new BubbleSort(), Q$:![}[(
new SelectionSort(), ow0!%|fO
new ShellSort(), rS4@1`/R
new QuickSort(), vG;zJ#c
new ImprovedQuickSort(), AC;V m: @{
new MergeSort(), u0#}9UKQ
new ImprovedMergeSort(), >.'<J]
new HeapSort() \MjJ9u `8
}; NPd%M
=JKv:</.G
public static String toString(int algorithm){ mt5KbA>nU
return name[algorithm-1]; /9zE^YcT
} V5GW:QT
x.3J[=z=>
public static void sort(int[] data, int algorithm) { lu#LCG-.
impl[algorithm-1].sort(data); zN{K5<7o
} \0mb 3Q'
~(pmLZ<GW}
public static interface Sort { lY{FSGp
public void sort(int[] data); (tCUlX2
} vfl5Mx4
H"C[&r
public static void swap(int[] data, int i, int j) { :$_6SQ<?
int temp = data; >m#e:[N
data = data[j]; }';D]c
data[j] = temp; m=:4`_0Q
} e|&6$A>4]
} /}Lt,9