[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; R!%nzL@e&`
} 0_eqO'"
int i1=l; mwo:+^v(
int i2=mid+1; HT6 [Z1
for(int cur=l;cur<=r;cur++){ #n'.a1R
if(i1==mid+1) v&|65[<
data[cur]=temp[i2++]; `Bw]PO
else if(i2>r) "bIb?e2h9G
data[cur]=temp[i1++]; X+C*+k,z
else if(temp[i1] data[cur]=temp[i1++]; a8f#q]TyQ
else %\v8FCb
data[cur]=temp[i2++]; ?0_<u4
} VD~5]TQ
} \4L ur
0eNdKE
} %W"u4 NT7
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改进后的归并排序: ? Bpnnwx
a$"nNmD?
package org.rut.util.algorithm.support; g5|~i{"0
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import org.rut.util.algorithm.SortUtil; ,\s`T O
Z-Uu/GjB
/** @QQ%09*
* @author treeroot )A$"COM4
* @since 2006-2-2 DxV=S0P
* @version 1.0 st;iGg
*/ b2OwLt9
public class ImprovedMergeSort implements SortUtil.Sort { b)<WC$"
r*+~(83k
private static final int THRESHOLD = 10; .`}TND~
@"@|O>KJ
/* q1T)H2S
* (non-Javadoc) ->rqr#
* s`jlE|jtN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n.&7lg^X
*/ {+WBi(=W
public void sort(int[] data) { w6i2>nu_O
int[] temp=new int[data.length]; pM?~AYWb
mergeSort(data,temp,0,data.length-1); oI;ho6y)
} V 9Qt;]mQ
-K'UXoU1
private void mergeSort(int[] data, int[] temp, int l, int r) { (dq_,LI
int i, j, k; =/Gd<qz3
int mid = (l + r) / 2; nzC *mPX8
if (l == r) uQIPnd(V
return; cuN9RG
if ((mid - l) >= THRESHOLD) Z*m^K%qJ
mergeSort(data, temp, l, mid); YGJ!!(~r
else Hu"$)V
insertSort(data, l, mid - l + 1); 509T?\r
if ((r - mid) > THRESHOLD) ]SCHni_
mergeSort(data, temp, mid + 1, r); ^eh.Iml'@
else 7GOBb|
insertSort(data, mid + 1, r - mid); -G.N
]p`y
for (i = l; i <= mid; i++) { l8FJ\5'M
temp = data; 5vyg-'
} A|\A|8=b
for (j = 1; j <= r - mid; j++) { lxyTh'
temp[r - j + 1] = data[j + mid]; )8A.Wg4S;c
} QPVi& *8_
int a = temp[l]; itYoR-XJ
int b = temp[r]; Voo'ZeZa
for (i = l, j = r, k = l; k <= r; k++) { /oT~CB..
if (a < b) { ZAr6RRv ^
data[k] = temp[i++]; H~Uf2A)C
a = temp; Sb[>R(0:
} else { k24I1DlR8
data[k] = temp[j--]; \J+a7N8m,
b = temp[j]; !|Q&4NS
} ,{PN6B
} ~JT`q:l-q
} ] 0X|_bU
wH ,PA:
/** Pvc)-A
* @param data gD9CA*
* @param l -TF},V~
* @param i l zFiZx
*/ WqA)V,E
private void insertSort(int[] data, int start, int len) { K,g6y#1"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M{J>yN
} 9<u&27.
} ]`$6=)_X
} IU8zidn&
} cb^IJA9}
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堆排序： e3ZRL91c
F_qApyU,7
package org.rut.util.algorithm.support; rr tMd
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import org.rut.util.algorithm.SortUtil; l$gJ^Wf2gY
A;;#]]48
/** @} r*KF-
* @author treeroot zDdo RK@
* @since 2006-2-2 t{] 6GlW
* @version 1.0 d~aTjf
*/ ArtY;.cg%
public class HeapSort implements SortUtil.Sort{ 0eA<nK
~rV$.:%va
/* (non-Javadoc) g$uiwqNA%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wO,qFY
*/ +S~ u,=
public void sort(int[] data) { { 4j<X5V
MaxHeap h=new MaxHeap(); :zU4K=kR
h.init(data); ~!({Unt+'
for(int i=0;i h.remove(); !f/K:CK|
System.arraycopy(h.queue,1,data,0,data.length); vc: kY
} eQ'E`S_d
>Lcu
private static class MaxHeap{ ? X8`+`nh
a?y ucA
void init(int[] data){ _/:--Z
this.queue=new int[data.length+1]; &u:U"j
for(int i=0;i queue[++size]=data; u0wu\
fixUp(size); j EbmW*
} 1|p\rHGd
} <sC(a7i1
fQ9af)d
private int size=0; )zWu\JRp
(Mfqzy
private int[] queue; TIp\-
.uA O.<
public int get() { %`$bQU
return queue[1]; >J9Qr#=H2
} E/H9#
0")_%
public void remove() { C/!P&`<6
SortUtil.swap(queue,1,size--); Zg_b(ks
fixDown(1); \l=A2i7TQ
} vVBWhY]
file://fixdown O.dZ3!!+
private void fixDown(int k) { !*c%Dj
int j; Ue9d0#9
while ((j = k << 1) <= size) { |}77'w :
if (j < size %26amp;%26amp; queue[j] j++; '@24<T]
if (queue[k]>queue[j]) file://不用交换 k x:+mF
break; 8;qOsV)UDT
SortUtil.swap(queue,j,k); mg*iW55g
k = j; !"hlG^*9
} Z84w9y7O<
} d*TH$-F!p
private void fixUp(int k) { b|87=1^m[
while (k > 1) { 9+(b7L
int j = k >> 1; %{ U (y#
if (queue[j]>queue[k]) @^0}wk
break; !v3d:n\W8
SortUtil.swap(queue,j,k); |$tF{\
k = j; \/dOv[
} */{y%
} c:=HN-*vQ
=?CIC%6m
} .P8m%$'N
k'X"jon
} xRZ K&vkKE
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SortUtil： k Jz^\Re
,M]W_\N~E
package org.rut.util.algorithm; ~p+ `pwjY1
\V~B+e
import org.rut.util.algorithm.support.BubbleSort; v#d3W| ~
import org.rut.util.algorithm.support.HeapSort; fhk(<KZvJ
import org.rut.util.algorithm.support.ImprovedMergeSort; oJVdFE
import org.rut.util.algorithm.support.ImprovedQuickSort; c@lF*"4
import org.rut.util.algorithm.support.InsertSort; &xr(Kb
import org.rut.util.algorithm.support.MergeSort; &#C|
import org.rut.util.algorithm.support.QuickSort; cm!vuoB~~
import org.rut.util.algorithm.support.SelectionSort; hXH+C-%{
import org.rut.util.algorithm.support.ShellSort; *k\;G?
L]YJ#5
/** E\2f"s
* @author treeroot %M_F/O
* @since 2006-2-2 kJ* N`=
* @version 1.0 An]Vx<PD
*/ -Nr*na^H9#
public class SortUtil { h1'm[Y
public final static int INSERT = 1; )1R[~]y
public final static int BUBBLE = 2; MHE/#G
public final static int SELECTION = 3; <&+0[9x
public final static int SHELL = 4; (;Bh7Ft
public final static int QUICK = 5; 6=%\@
public final static int IMPROVED_QUICK = 6; 2UR1T~r
public final static int MERGE = 7; v?d`fd
public final static int IMPROVED_MERGE = 8; 9QD+
public final static int HEAP = 9; 4[Ko|
G_WFg$7G%
public static void sort(int[] data) { 1)u,%
sort(data, IMPROVED_QUICK); r"|do2s
} xJ^B.;>
private static String[] name={ ]'<}kJtN.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iqF|IVPoi
}; &w=ul'R98
-{oZK{a1
private static Sort[] impl=new Sort[]{ WM9({BZ
new InsertSort(), ;<MHl[jJD
new BubbleSort(), 4<EC50@.
new SelectionSort(), Ga^:y=m
new ShellSort(), njNqUo>
new QuickSort(), ra ,.vJuT
new ImprovedQuickSort(), K6F05h 5S
new MergeSort(), t[HsqnP
new ImprovedMergeSort(), A'uubFRL2[
new HeapSort() _Kli~$c& M
}; p=[I;U-#H
Eb'M< ZY
public static String toString(int algorithm){ t@2MEo
return name[algorithm-1]; 5HB*
} ocS}4.a@
RdjoVCf
public static void sort(int[] data, int algorithm) { \+ Ese-la
impl[algorithm-1].sort(data); |]HA@7B
} +Lr`-</VF
Eg4&D4TGp
public static interface Sort { Q*f0YjH!
public void sort(int[] data); Rto/-I0l
} ~1Ffu x
ZlMS=<hgFx
public static void swap(int[] data, int i, int j) { 6m:$RW
int temp = data; p`"Ic2xPJ
data = data[j]; uowdzJ7
data[j] = temp; x=W5e ^0?
} 1Si$Q
} ;Rxc(tR!n