[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; Ft7l/
} 4BX*-t
int i1=l; aQuENsB
int i2=mid+1; Wit1WI;18
for(int cur=l;cur<=r;cur++){ Pc-HQU
if(i1==mid+1) :mL.Y em*'
data[cur]=temp[i2++]; IAQ=d4V&
else if(i2>r) S]+}Zyg
data[cur]=temp[i1++]; M_DkjuR
else if(temp[i1] data[cur]=temp[i1++]; 54-x 14")
else [a2/`ywdV
data[cur]=temp[i2++]; ?g2K&
} 7P]pk=mo
} 7UfyOOFa
v?J2cL
} `Jo}/c5R
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改进后的归并排序: =Vfj#WL
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package org.rut.util.algorithm.support; ~ i,my31
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import org.rut.util.algorithm.SortUtil; /on p<u
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/** ~Km8-b(&
* @author treeroot $vd._j&
* @since 2006-2-2 a&JAF?k
* @version 1.0 0nX5 $Kn
*/ JT<J[Qz5
public class ImprovedMergeSort implements SortUtil.Sort { gxiJ`.D=
sz5@=
private static final int THRESHOLD = 10; v%r!}s
f/xBR"'
/* |?8wyP
* (non-Javadoc) Oc1ZIIkh\
* BC^WPr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lsd\ `X5,
*/ (s*}=
public void sort(int[] data) { d)@MMF
int[] temp=new int[data.length]; i*3_ivc)
mergeSort(data,temp,0,data.length-1); TD@'0MaQ#
} dbR4%;<
H!N,PI?rn
private void mergeSort(int[] data, int[] temp, int l, int r) { 3!I8J:GZ:
int i, j, k; l[gL(p"W
int mid = (l + r) / 2; 5|Uub,
if (l == r) iw%DQ }$
return; | e+m!G1G
if ((mid - l) >= THRESHOLD) -kkXyO8js
mergeSort(data, temp, l, mid); |( KM 8
else B}p/ ,4x6
insertSort(data, l, mid - l + 1); V&G_Bu~
if ((r - mid) > THRESHOLD) Y\lBPp0{\v
mergeSort(data, temp, mid + 1, r); jWQB~XQY
else cIH`,bR
insertSort(data, mid + 1, r - mid); MFVFr "
aLr^uce]
for (i = l; i <= mid; i++) { i ):el=
temp = data; m{X;|-DK[
} qsLsyi|zG
for (j = 1; j <= r - mid; j++) { WH!<Z=#c}
temp[r - j + 1] = data[j + mid]; ]l4\/EW6
} ,YH.n>`s+
int a = temp[l]; {)G3*>sG3
int b = temp[r]; ls=<c<
for (i = l, j = r, k = l; k <= r; k++) { 1i{B47|
if (a < b) { &]5<^?3
data[k] = temp[i++]; :geXplTx
a = temp; u%2u%-w
} else { Y?> S.B7
data[k] = temp[j--]; dJkTHmw
b = temp[j]; :=* -x
} 4h|D[Cb]
} R,(^fM
} !R-UL#w9W'
BR|dW4\
/** ~{HA!C#
* @param data oY{*X6:6<
* @param l o)NWsUXf
* @param i {KR/TQ?A
*/ Z-WWp#b
private void insertSort(int[] data, int start, int len) { q,2 @X~T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P9c1NX\-
} iGR(
} bf3)^ 49}
} 4>(?R[:p)
} #df Aqg'
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堆排序： &c A?|(7-
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package org.rut.util.algorithm.support; Kl^Yq
s4w<X}O_
import org.rut.util.algorithm.SortUtil; thOCzGJ$
'oo]oeJ-
/** \4V'NTjB
* @author treeroot -"<eq0
* @since 2006-2-2 ;e-iiC]PI
* @version 1.0 m0:8thZN
*/ NvYgRf}uh
public class HeapSort implements SortUtil.Sort{ ,TL~];J'
{C 7=
/* (non-Javadoc) ]RxNSr0e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #Qkl| h
*/ CnAhEf)b
public void sort(int[] data) { rGoB&% pc
MaxHeap h=new MaxHeap(); L/V3sSt
h.init(data); EQg 6*V
for(int i=0;i h.remove(); o#;w>-
System.arraycopy(h.queue,1,data,0,data.length); /+'@}u |
} -5.>9+W8I
j&8U:Q,
private static class MaxHeap{ B^eea[
+1e*>jE
void init(int[] data){ g-6!+>w*>e
this.queue=new int[data.length+1]; 18a6i^7
for(int i=0;i queue[++size]=data; -O2QzzE&
fixUp(size); yp8 .\.
} cLamqZf3
} MECR0S9
aX0sy\Z]j
private int size=0; ^E>}A
O#9Q+BD
private int[] queue; h4sEH
xU)~)eK
public int get() { P||u{]vU
return queue[1]; >GqIpfn
} 9;.dNdg>
Ey)ox$
public void remove() { !m78/[LW
SortUtil.swap(queue,1,size--); y![h
fixDown(1); NmK%k jCx
} 28zt.9
file://fixdown d d8^V_Kx
private void fixDown(int k) { 5C/u`{4]Hg
int j; F YcC2TM
while ((j = k << 1) <= size) { |Y:T3hra61
if (j < size %26amp;%26amp; queue[j] j++; InRn!~_N
if (queue[k]>queue[j]) file://不用交换 yl|+D]
break; 2f F)I&
SortUtil.swap(queue,j,k); )-[X^l j
k = j; *,mbZE=<
} u{8Wu;
} aRfkJPPa[
private void fixUp(int k) { r/8,4:rh
while (k > 1) { t'~:me!
int j = k >> 1; Z3 &8(vw
if (queue[j]>queue[k]) {?,:M
break; 9'O<d/xj/
SortUtil.swap(queue,j,k); J0^p\mG
k = j; AlGD .K
} ,v(G2`Z
} GMd81@7
#~nI^ ggW
} vrh}X[JEw'
<PXA`]x~
} g`\Vy4w
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SortUtil： D`iWf3a.
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package org.rut.util.algorithm; T7&itgEYG/
<4^a(Zh
import org.rut.util.algorithm.support.BubbleSort; @ -g^R4e<
import org.rut.util.algorithm.support.HeapSort; *j8w" 4
import org.rut.util.algorithm.support.ImprovedMergeSort; 3 nb3rHQ
import org.rut.util.algorithm.support.ImprovedQuickSort; !i{@B
import org.rut.util.algorithm.support.InsertSort; nbhx2@Teqe
import org.rut.util.algorithm.support.MergeSort; n0nkv[
import org.rut.util.algorithm.support.QuickSort; 9NKZE?5P|D
import org.rut.util.algorithm.support.SelectionSort; HH8a"Hq)
import org.rut.util.algorithm.support.ShellSort; _/7[=e}y
bMf+/n
/** R~)c(jj5
* @author treeroot k:R9wo
* @since 2006-2-2 RQv`D&u_
* @version 1.0 ykM(` 1`m
*/ W>'R<IY4#N
public class SortUtil { s|YY i~
public final static int INSERT = 1; -x5^>+Y4
public final static int BUBBLE = 2; o"K{^ L~u
public final static int SELECTION = 3; @~/LsYA:
public final static int SHELL = 4; 1,BtOzuRo
public final static int QUICK = 5; QZ%_hvY[%>
public final static int IMPROVED_QUICK = 6; yP~D."
public final static int MERGE = 7; {U7j
public final static int IMPROVED_MERGE = 8; 0p:n'P
public final static int HEAP = 9; amgYr$)m
NcRY Ch
public static void sort(int[] data) { 6SW:'u|90
sort(data, IMPROVED_QUICK); SbrBlP:G
} liPUK#
private static String[] name={ ^hTq~"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YgrBIul
}; v&p\r'w
$:F]O$A
private static Sort[] impl=new Sort[]{ *m2J$9q
new InsertSort(), N!^U{;X7/
new BubbleSort(), TC"mP!1
new SelectionSort(), ?5"~V^L3
new ShellSort(), bQEQHqY5
new QuickSort(), 866n{lyL
new ImprovedQuickSort(), rn U2EL
new MergeSort(), MvJEX8M
new ImprovedMergeSort(), X2T)]`@
new HeapSort() <c^m|v
}; f`P%aX'cBQ
DYbkw4Z,
public static String toString(int algorithm){ &\`=}hB
return name[algorithm-1]; 0|HD(d`a
} qzsS"=5
!Vv$
public static void sort(int[] data, int algorithm) { ^=FtF9v
impl[algorithm-1].sort(data); [P,1UO|$B
} ;&?NuK
<wc=SMmO
public static interface Sort { ?,TON5Fl-
public void sort(int[] data); jats)!:
} 9Jaek_A`
@R(6w{h9
public static void swap(int[] data, int i, int j) { zr2%|YF
int temp = data; a*KB'u6&
data = data[j]; cPkN)+K
data[j] = temp; dy#dug6j
} Z_cTuu0'
} m?>$!B4jFB