[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; Z_ *ZUN?B
} '`A67bdq)
int i1=l; K/LaA4
int i2=mid+1; =VI`CBQ/Um
for(int cur=l;cur<=r;cur++){ h^,YYoA$
if(i1==mid+1) x:wq"X
data[cur]=temp[i2++]; vH\nL>r
else if(i2>r) O7_NXfh|
data[cur]=temp[i1++]; K]azUK7
else if(temp[i1] data[cur]=temp[i1++]; }j<_JI
else #(}_2x5
data[cur]=temp[i2++]; b:d.Lf{y7
} { dxyBDK
} xx2:5
9Qm{\
} ' xq5tRg>
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改进后的归并排序: K>p:?w
Uc;IPS
package org.rut.util.algorithm.support; 5TW<1'u
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import org.rut.util.algorithm.SortUtil; gmH0-W)=
HE.Dl7{
/** p.7p,CyB
* @author treeroot RPqn#B
* @since 2006-2-2 rlh6\Fa
* @version 1.0 g<jK^\eW
*/ -Y,Ibq
public class ImprovedMergeSort implements SortUtil.Sort { w9?wy#YI
^Q+5M"/8
private static final int THRESHOLD = 10; G!lykk]
|vE#unA
/* ]V7hl#VO
* (non-Javadoc) *>H'@gS
* 4>eg@sN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pv.),Iv-68
*/ X~VZ61vNu
public void sort(int[] data) { >R!I
int[] temp=new int[data.length]; :<G+)hIK
mergeSort(data,temp,0,data.length-1); TgG)btQ
} ~x#-#nuh"
WED7]2>
private void mergeSort(int[] data, int[] temp, int l, int r) { =7Gi4X%
int i, j, k; fH{$LjH(
int mid = (l + r) / 2; xo3)dsX
if (l == r) X7!A(q+h
return; *VAi!3Rx;
if ((mid - l) >= THRESHOLD) "@bk$o=
mergeSort(data, temp, l, mid); b<MMli
else os+wTUR^
insertSort(data, l, mid - l + 1); ,tc]E45
if ((r - mid) > THRESHOLD) obkv ]~
mergeSort(data, temp, mid + 1, r); a'.=.eDQ
else \shoLp
insertSort(data, mid + 1, r - mid); 5%$kAJZC-
<t2?Oii;
for (i = l; i <= mid; i++) { D#(Pg
temp = data; BU .G~0
} #!<s& f|O
for (j = 1; j <= r - mid; j++) { AYtcN4\/
temp[r - j + 1] = data[j + mid]; U}5KAi 9Z
} |-?b)yuAz
int a = temp[l]; c'4 \F9
int b = temp[r]; x?$Y<=vT
for (i = l, j = r, k = l; k <= r; k++) { #rC+13
if (a < b) { ?7dDQI7^(
data[k] = temp[i++]; RLr-xg$K-t
a = temp; dz DssAHy
} else { .j,&/y&
data[k] = temp[j--]; >@\-m
b = temp[j]; 2z l
} 4}b:..Ku
} +DDvM;31w
} 6H9]]Unju
[IW7]Fv<F
/** z(a:fL{/XG
* @param data g7ROA8xu
* @param l P,], N)
* @param i D{}\7qe
*/ eS+LFS7*k
private void insertSort(int[] data, int start, int len) { {=Y&q~:8v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CF4y$aC#
} 7m$/.\5
} MYm6C;o$
} jP]'gQ!-w
} 8BdeqgU/_
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堆排序： Yf9L~K
F:U_gW?
package org.rut.util.algorithm.support; Gj0NN:
11'Tt!
import org.rut.util.algorithm.SortUtil; 6<GWDO
q3:' 69
/** m/h0J03'T
* @author treeroot *GMRu,u2
* @since 2006-2-2 e$h\7i:(
* @version 1.0 1A *8Jnw
*/ =ye}IpC*M
public class HeapSort implements SortUtil.Sort{ [\p0eUog/
hWJc A.A
/* (non-Javadoc) IVKE dwA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #,pLVt<
*/ )BB a
public void sort(int[] data) { C<)&qx3
MaxHeap h=new MaxHeap(); Ved:w^ ,
h.init(data); F!<x;h(
for(int i=0;i h.remove(); %;gWl1&5
System.arraycopy(h.queue,1,data,0,data.length); Lr&tpB<
} ]y$C6iUY*
-"H9W:
private static class MaxHeap{ *l} 0x@
E{B<}n|}&
void init(int[] data){ u?i1n=Ne
this.queue=new int[data.length+1]; Q^OzFfR6
for(int i=0;i queue[++size]=data; e76)z;'
fixUp(size); )}8%Gs4C
} _JXE/
} /J:j'6
>?V->7QLP
private int size=0; _!D$Aj
Ky|0IKE8Z
private int[] queue; |szfup~5es
P&VI2k
public int get() { Y]Q*I\X
return queue[1]; )c/BDC7g
} tIw4V^'|
H9?~#GPb
public void remove() { cR} =3|t
SortUtil.swap(queue,1,size--); ~+hG}7(:
fixDown(1); wz=I+IN:
} Gz:a1-x
file://fixdown j|9 2 g
private void fixDown(int k) { I1jF`xQ&0
int j; Q[^d{e*l
while ((j = k << 1) <= size) { bx>D
if (j < size %26amp;%26amp; queue[j] j++; "M]]H^r5
if (queue[k]>queue[j]) file://不用交换 `pr,lL
break; Z$@Nzza-
SortUtil.swap(queue,j,k); U# gmk0>t{
k = j; Zuf&maa S
} 4a~_hkY]
} 'UKB pm/
private void fixUp(int k) { Nt?B(.G
while (k > 1) { b7/4~_s
int j = k >> 1; ZhU2z*qN#
if (queue[j]>queue[k]) }^t?v*kcA
break; 5q[@N J
SortUtil.swap(queue,j,k); LvaF4Y2v
k = j; -q27N^A0
} Ym6[~=~EK
} |BR&p)7)
~yV0SpL
} 3ly|y{M",
(nm&\b~j
} H^~!t{\
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SortUtil： bVym
;nbvn
package org.rut.util.algorithm; L`BLkDm
6IA~bkc}
import org.rut.util.algorithm.support.BubbleSort; OB:G5B`
import org.rut.util.algorithm.support.HeapSort; 0FBifK
import org.rut.util.algorithm.support.ImprovedMergeSort; {^F_b% a4z
import org.rut.util.algorithm.support.ImprovedQuickSort; qdhD6#r
import org.rut.util.algorithm.support.InsertSort; +9t@eHJT1
import org.rut.util.algorithm.support.MergeSort; fsu'W]f
import org.rut.util.algorithm.support.QuickSort; ]v#Q\Q8>
import org.rut.util.algorithm.support.SelectionSort; uzOZxW[e
import org.rut.util.algorithm.support.ShellSort; ul E\>5O4h
OLq/OO,w
/** sE% n=Ww
* @author treeroot _kfApO)O
* @since 2006-2-2 q%l<Hw6{z
* @version 1.0 b1+Nm
*/ />$kDe
public class SortUtil { q-H]Hxv
public final static int INSERT = 1; G|V ^C_:
public final static int BUBBLE = 2; e>/PW&Z8Z
public final static int SELECTION = 3; wp$=lU{B
public final static int SHELL = 4; G7u85cie
public final static int QUICK = 5; h4U .wk
public final static int IMPROVED_QUICK = 6; hM-qC|!
public final static int MERGE = 7; +-ue={'
public final static int IMPROVED_MERGE = 8; TAP/gN'
public final static int HEAP = 9; Rh39x-`Z
oPi)#|jcb
public static void sort(int[] data) { Ty>`rn
sort(data, IMPROVED_QUICK); Wjp<(aY[
} {az8*MR=X
private static String[] name={ ~dv C$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x~ I cSt
}; RSy1 wp4W
1'h?qv^(
private static Sort[] impl=new Sort[]{ `eA0Z:`g!
new InsertSort(), X@B+{IFC
new BubbleSort(), &}WSfZ0{
new SelectionSort(), j&F&wRD%r
new ShellSort(), 'n\ZmG{
new QuickSort(), l ^{]pD
new ImprovedQuickSort(), u VB&DE
new MergeSort(), |b|p0Z%7{
new ImprovedMergeSort(), Q-AN~k8+)[
new HeapSort() 7kO 1d{u6b
}; K-K+%U
%k"-rmW
public static String toString(int algorithm){ 6_XTeu
return name[algorithm-1]; QJxcH$
} ~*&_zPTN
:wMZ&xERDZ
public static void sort(int[] data, int algorithm) { Upf1*$p
impl[algorithm-1].sort(data); &_ber ad
} xi^_C!*J
]:F]VRPT
public static interface Sort { fZgZ
public void sort(int[] data); Te;`-EL
} p!=/a)4X
5ES$qYN
public static void swap(int[] data, int i, int j) { N52N ^X>
int temp = data; v6]lH9c{,
data = data[j]; V /|@
data[j] = temp; ]F,5Oh :OY
} (UpSi6?\
} XMpPG~XdN