[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; ?2;r#)
} X#mppMU
int i1=l; daIt `}s
int i2=mid+1; lk6*?EJ
for(int cur=l;cur<=r;cur++){ SPxgIP;IR
if(i1==mid+1) NGlX%j4j
data[cur]=temp[i2++]; AoEG%nT
else if(i2>r) AopCxaJ`
data[cur]=temp[i1++]; X'Dg= |
else if(temp[i1] data[cur]=temp[i1++]; EF?@f{YY$n
else EwcN$Ma
data[cur]=temp[i2++]; 4w:_4qyb
} UJ_E&7,L
} HKk;oG
Y zXL8
} 37wm[Z
Z;aQ/n[`
改进后的归并排序: I%43rdoPe
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package org.rut.util.algorithm.support; ^<R*7mB*
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import org.rut.util.algorithm.SortUtil; _W4i?Bde
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/** Kv[,!P"Y
* @author treeroot gg(^:`+
* @since 2006-2-2 *BYSfcX6
* @version 1.0 z6vRTY
*/ Eoug/we
public class ImprovedMergeSort implements SortUtil.Sort { ee]PFW28
MX 2UYZ&
private static final int THRESHOLD = 10; 'Lft\.C
EnJAHgRV;e
/* jZcjiOX
* (non-Javadoc) ?]081l7cd
* CE>RAerY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1o7 pMp=
*/ /H=fK
public void sort(int[] data) { )FM/^
int[] temp=new int[data.length]; 3VbQDPG
mergeSort(data,temp,0,data.length-1); ip4:px-
} 2P8JLT*Tj
ur-&- G^
private void mergeSort(int[] data, int[] temp, int l, int r) { 1%|+yu1
int i, j, k; ^{["]!f#
int mid = (l + r) / 2; B&_62`
if (l == r) `?PZvGi
return; $WvI%r
if ((mid - l) >= THRESHOLD) '}*5ee](S
mergeSort(data, temp, l, mid); rp.S4;=Q9
else |lIkmW{
insertSort(data, l, mid - l + 1); ~a8J"Wh
if ((r - mid) > THRESHOLD) yOGaW~
mergeSort(data, temp, mid + 1, r); KL!k'4JNY
else P8e1J0A
insertSort(data, mid + 1, r - mid); [1'`KJ]
x2.G1
for (i = l; i <= mid; i++) { e =Vu;
temp = data; EVMhc"L
} ,b=&iDc
for (j = 1; j <= r - mid; j++) { S=^yJ6xJ
temp[r - j + 1] = data[j + mid]; p%CAicn
} G8@({EY
int a = temp[l]; %O;"Z`I
int b = temp[r]; iLn)Z0<\o
for (i = l, j = r, k = l; k <= r; k++) { b7{)B?n
if (a < b) { ="RDcf/
data[k] = temp[i++]; Dg/&m*Yl
a = temp; L@w|2
} else { AZxx%6
data[k] = temp[j--]; oYnA 3
b = temp[j]; _/ZIDIn
} 'MPt K
} 8zGe5Dn9
} 'i_od|19~h
k/O|ia6
/** =Z iyT$p
* @param data ; )O)\__"-
* @param l B=#rp*vwL
* @param i X3I\O,"I
*/ zTBr<:
private void insertSort(int[] data, int start, int len) { <DiD8")4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N VzR2
} e~c;wP~cO
} v I@Wuu:
} ?7^H1L
} ePK^v_vBD
H^p?t=Y
堆排序： Ooz+V;#Q
QP)-O*+AA
package org.rut.util.algorithm.support; ',`iQt!Lx
1b E$x^P
import org.rut.util.algorithm.SortUtil; G5E03xvL
JJq= {;
/** ;_M .(8L
* @author treeroot n[CESo%[
* @since 2006-2-2 ~qLbyzHaB
* @version 1.0 I)V2cOrXM
*/ p8Di9\}
public class HeapSort implements SortUtil.Sort{ Ec[=~>;n{l
qi}HJkOq
/* (non-Javadoc) R{5Qb?&wOp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V#^~JJW^
*/ FD*`$.e3\
public void sort(int[] data) { (tP>z+
MaxHeap h=new MaxHeap(); .GM&]Hb
h.init(data); x:O?Fj
for(int i=0;i h.remove(); .t4IR =Z
System.arraycopy(h.queue,1,data,0,data.length); bgqN&J)Jr)
} QS,IM>Nr
\CM(
private static class MaxHeap{ (ta!4h,
bqN({p&
void init(int[] data){ xIf,1g@Cq9
this.queue=new int[data.length+1]; 1[C,*\X8v
for(int i=0;i queue[++size]=data; j./3)
fixUp(size); ~K 8eRT
} .JZoZ.FAb
} `{CaJ6.
%+ig7a:
private int size=0; sAfSI<L_
<w(UDZ
private int[] queue; ;#P@(ZVT
"X g@X5BG
public int get() { m'XzZmI
return queue[1]; Hu|NS{Ke-
} R{\vOw:*
C;}~C:aJ
public void remove() { +|).dm
SortUtil.swap(queue,1,size--); E:T<mI?d
fixDown(1); {N[IjY
} 9kuL1tcY
file://fixdown XL>Vwd
private void fixDown(int k) { u^|XQWR$:
int j; @>B#2t&
while ((j = k << 1) <= size) { cBBc^SR
if (j < size %26amp;%26amp; queue[j] j++; /$'tO3
if (queue[k]>queue[j]) file://不用交换 (]^9>3{|
break; $)vljM<<
SortUtil.swap(queue,j,k); FF6[qSV
k = j; |8c3%jve
} o*eU0
} }H!c9Y
private void fixUp(int k) { 4K[E3aA
while (k > 1) { a[]=*(AZI
int j = k >> 1; <s2IC_f<+
if (queue[j]>queue[k]) Bjq1za
break; O9oYuC:q
SortUtil.swap(queue,j,k); ?P,z^
k = j; ;RB]awE
} (Ybc~M)z
} 3_~V(a
Ovv~ymj
} @bOhnd#W
EA|*|o4)
} %RG kXOgp
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SortUtil： QUVwO m
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package org.rut.util.algorithm; d5fnJ*a>l
fAm^-uq[
import org.rut.util.algorithm.support.BubbleSort; !fZ\GOx
import org.rut.util.algorithm.support.HeapSort; rQ(Aj
import org.rut.util.algorithm.support.ImprovedMergeSort; =21$U[
import org.rut.util.algorithm.support.ImprovedQuickSort; |Nd!+zE$Z
import org.rut.util.algorithm.support.InsertSort; qxf!]jm
import org.rut.util.algorithm.support.MergeSort; EeG7 %S 5(
import org.rut.util.algorithm.support.QuickSort; & V^Z
import org.rut.util.algorithm.support.SelectionSort; H)}>&Z4
import org.rut.util.algorithm.support.ShellSort; cKdn3 2Y4
rE;*MqYt&
/** yhJH3<
* @author treeroot F$ShhZgi
* @since 2006-2-2 V$VqYy9 *
* @version 1.0 ?>cx;"xF
*/ LdwWB `L
public class SortUtil { I?uU}NK
public final static int INSERT = 1; >0Y >T6!
public final static int BUBBLE = 2; zUXQl{
public final static int SELECTION = 3; I'HPy.PV
public final static int SHELL = 4; Zy|B~.@<j
public final static int QUICK = 5; D+P(
public final static int IMPROVED_QUICK = 6; juG?kL.
public final static int MERGE = 7; }pdn-#
public final static int IMPROVED_MERGE = 8; H<#M)8
public final static int HEAP = 9; bGOOC?[UX
/W1!mih
public static void sort(int[] data) { t6m3lq{
sort(data, IMPROVED_QUICK); Bha#=>4FU
} '#!nK O2<
private static String[] name={ K'%2'd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zsFzF`[k
}; xHq"1Vs=
"XfCLc1 T
private static Sort[] impl=new Sort[]{ kd)Q$RA(
new InsertSort(), >lQ@" U
new BubbleSort(), c[J?`8
new SelectionSort(), gI "ZhYI
new ShellSort(), 4l7TrCB
new QuickSort(), bc=,$
new ImprovedQuickSort(), g5M=$y/H
new MergeSort(), g"ha1<y<
new ImprovedMergeSort(), r*HbglB
new HeapSort() #%N v\g;
}; p4GhT~)l:
Z^E>)!t
public static String toString(int algorithm){ #V&98 F
return name[algorithm-1]; ?g^42IYG
} =!)Ye:\Q
)UbPG`x8
public static void sort(int[] data, int algorithm) { TwlX'iI_;
impl[algorithm-1].sort(data); 7'Z-VO
} YbtsJ <w
g xY6M4
public static interface Sort { 3}dTbr4y
public void sort(int[] data); i0Ejo;dB
} Su?e\7aj
[p3{d\=*?
public static void swap(int[] data, int i, int j) { uP, iGA
int temp = data; })W9=xO~
data = data[j]; <|Srbs+
data[j] = temp; 7]W6\Z
} (rqc_ZU5
} 7OAM