[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; +DQUL|\
} 8@ f!,!Wn
int i1=l; \v+>qY<q
int i2=mid+1; Z=$-S(>J
for(int cur=l;cur<=r;cur++){ &g}P)xr
if(i1==mid+1) d@^%fVhG
data[cur]=temp[i2++]; Xz:ha>}C
else if(i2>r) X}G$ON
data[cur]=temp[i1++]; m{$+
else if(temp[i1] data[cur]=temp[i1++]; v`L]dY4,
else M8:i]
data[cur]=temp[i2++]; D,*|:i
} &I-T
} VZ IY=Q>g
RU#}!Kq
} &b>&XMIK
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改进后的归并排序: )AEtW[~D
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package org.rut.util.algorithm.support; 3ouy-SQ
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import org.rut.util.algorithm.SortUtil; >+<b_q|P
|) cJ
/** 7L:Eg
* @author treeroot dHAT($QG
* @since 2006-2-2 `uLr^G=;
* @version 1.0 Qm7];,
*/ Uufig)6
public class ImprovedMergeSort implements SortUtil.Sort { ?zP 2
L[:AUe
private static final int THRESHOLD = 10; [&P@0Fn
PI$i_3N
/* yX*$PNL5w
* (non-Javadoc) g :B4zlKG
* }UcdkKq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2oc18#iG(
*/ jLn#%Ia}
public void sort(int[] data) { |<3x`l-`
int[] temp=new int[data.length]; sWse (_2
mergeSort(data,temp,0,data.length-1); mVS^HQ:
} y5c\\e
4dN <B U
private void mergeSort(int[] data, int[] temp, int l, int r) { T)<^S(57
int i, j, k; 96;5
int mid = (l + r) / 2; :!cK?H$+
if (l == r) `, ]ui*
return; t%e<]2-8
if ((mid - l) >= THRESHOLD) &2.DZ),L
mergeSort(data, temp, l, mid); y4@gw.pt
else IP{$lC
insertSort(data, l, mid - l + 1); >h:'Z*9
if ((r - mid) > THRESHOLD) ^uG^>Om*
mergeSort(data, temp, mid + 1, r); ]Ue aXwaU
else IDf\!QGx
insertSort(data, mid + 1, r - mid); l-nH
9%SC#V'
for (i = l; i <= mid; i++) { 569p/?
temp = data; }&L%c>
} ~}{_/8'5
for (j = 1; j <= r - mid; j++) { PP\ bDEPy
temp[r - j + 1] = data[j + mid]; -Op^3WWyY
} 4 7mT
int a = temp[l]; ZXo;E
int b = temp[r]; ~s-gnp
for (i = l, j = r, k = l; k <= r; k++) { tBJ4lb
if (a < b) { s8's(*]
data[k] = temp[i++]; )2l @%?9
a = temp; Yj bp:
} else { ,)dlL tUm
data[k] = temp[j--]; /zXOtaG
b = temp[j]; IIT[^_g
} 6`6 / 2C$%
} NNr6~m)3v
} \}4*}Lr
b{aB^a:f=L
/** 04}8x[t
* @param data )\D{5j
* @param l 2[(~_VJ
* @param i <@GO]vY
*/ 2?6]Xbs{
private void insertSort(int[] data, int start, int len) { xR kw+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j `!Ge
} g yV>k=B
} 'wYIJK~1
} /TPtPq<7:#
} N.q*jY=X|
k18v{)i~
堆排序： !&b| [b
p/nATvh$
package org.rut.util.algorithm.support; o o'7
<[ 2?~s
import org.rut.util.algorithm.SortUtil; ZI1]B944ni
e-v|
/** 'ZI8nMY
* @author treeroot _x""-X~OL
* @since 2006-2-2 }ssja,;
* @version 1.0 }6.@
*/ Ua:@,};
public class HeapSort implements SortUtil.Sort{ KIv_ AMr
>`WfY(Lq
/* (non-Javadoc) R@pY+d9qp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <'UGYY\wg0
*/ {PxFG<^U
public void sort(int[] data) { ]&P\|b1*g
MaxHeap h=new MaxHeap(); {K"hlu[
h.init(data); H"UJBO>$
for(int i=0;i h.remove(); f@hM^%
System.arraycopy(h.queue,1,data,0,data.length); c'3N;sZ*B
} ZB)R4
?_bFe![q
private static class MaxHeap{ ;ltk}hJ]
8kdJtEW3
void init(int[] data){ vOz1& |;D
this.queue=new int[data.length+1]; -8FUR~WJ
for(int i=0;i queue[++size]=data; Nb9GrYIS
fixUp(size); >"=DN5w ,S
} |LbAW/9a
} ^Y+C!I
*{+{h;p
private int size=0; #O;JV}y
rq!*unJ
private int[] queue; a9p:k ]{
! #! MTk
public int get() { 6YNL4HE?
return queue[1]; qF`6l(
} YI7M%B9Lj
Mth:V45G|
public void remove() { ti%RE:*
SortUtil.swap(queue,1,size--); %aw.o*@:
fixDown(1); TvDC4tm-:
} kD;pj3o&"2
file://fixdown ^Z;zA@[wt
private void fixDown(int k) { \B84
int j; ZfqN4
while ((j = k << 1) <= size) { 6MY<6t0a
if (j < size %26amp;%26amp; queue[j] j++; t>?tWSNf
if (queue[k]>queue[j]) file://不用交换 *n EkbI/
break; ^5Lk}<utw
SortUtil.swap(queue,j,k); n6WKk+
k = j; 8aWEl%
} h ':ZF
} lTq"j?#E]m
private void fixUp(int k) { !YjxCx
while (k > 1) { 7CuZ7!>$
int j = k >> 1; ZGR5"el!
if (queue[j]>queue[k]) f4Y)GO<R]
break; HW~-GcU-o
SortUtil.swap(queue,j,k); V+lF|CZb5
k = j; xIa7F$R 0
} D 6y,Q
} Rb0I7~Z%'d
0]
} oS..y($TI
io+V4m
} 1]~w?)..'
+Z|3[#W
SortUtil： u>:(MARsR
@ G)yz!H
package org.rut.util.algorithm; ;H~<.QW
NvJ5[W
import org.rut.util.algorithm.support.BubbleSort; 1F`jptVQ\G
import org.rut.util.algorithm.support.HeapSort; Px=@Tw N,
import org.rut.util.algorithm.support.ImprovedMergeSort; HVHv,:bPo
import org.rut.util.algorithm.support.ImprovedQuickSort; qJdlZW<
import org.rut.util.algorithm.support.InsertSort; )'U0n`=
import org.rut.util.algorithm.support.MergeSort; A/'po_'uy
import org.rut.util.algorithm.support.QuickSort; ]1<GZ`
import org.rut.util.algorithm.support.SelectionSort; 9/(jY$Ar
import org.rut.util.algorithm.support.ShellSort; v}Ju2}IK
rjK`t_(=
/** u7[}pf$}
* @author treeroot 4_=2|2Wz[
* @since 2006-2-2 w(6n
* @version 1.0 <8^x Mjc
*/ k[ro[E
public class SortUtil { ,.W7Z~z
public final static int INSERT = 1; E(PBV
public final static int BUBBLE = 2; 8\lh'8
public final static int SELECTION = 3; ciS,
public final static int SHELL = 4; =zyA~}M2
public final static int QUICK = 5; <R /\nYXz
public final static int IMPROVED_QUICK = 6; >UaQ7CRo
public final static int MERGE = 7; /gZyl|kdy
public final static int IMPROVED_MERGE = 8; vNv!fkl
public final static int HEAP = 9; !&rd#ZBn
~pQN#C)CO>
public static void sort(int[] data) { MWh Y&I+
sort(data, IMPROVED_QUICK); a^p#M
} yk`qF'4]
private static String[] name={ )e,O+w"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RTm/-6[N
}; 9dhEQ=K{3
9VnBNuT
private static Sort[] impl=new Sort[]{ IQ I8v
new InsertSort(), 2aM7zP[Z
new BubbleSort(), |]*3En:
new SelectionSort(), R2Fjv@Egk
new ShellSort(), @m#OhERv
new QuickSort(), =+!l8o&o,
new ImprovedQuickSort(), Fye>H6MU
new MergeSort(), ;ItH2Lw<&
new ImprovedMergeSort(), K"0IWA
new HeapSort() ;v:(
}; {?H5Pw>{%h
;KlYiu
public static String toString(int algorithm){ hWT jN
return name[algorithm-1]; Ku75YFO,5
} qcj {rG18
-d\sKc
public static void sort(int[] data, int algorithm) { "r-P[EKpL
impl[algorithm-1].sort(data); pUXoSnIq:
} \#_ymM0
gYB!KM *v
public static interface Sort { }xk(aM_
public void sort(int[] data); 3#>W\_FY*D
} oBkhb
sE pI)9
public static void swap(int[] data, int i, int j) { !ajBZ>Q
int temp = data; `5IrV&a
data = data[j]; Cq\XLh `
data[j] = temp; <(xqw<)
} y?<KN0j
} %y6(+I#P