[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; iz'8P-]K>
} pS%Az)3RZ
int i1=l; $exu}%
int i2=mid+1; .VUZ4e
for(int cur=l;cur<=r;cur++){ hE=cgO`QU
if(i1==mid+1) %pMW5]H
data[cur]=temp[i2++]; $]Q_x?
else if(i2>r) zYep V
data[cur]=temp[i1++]; TqlUe@E
else if(temp[i1] data[cur]=temp[i1++]; u%|VmM>
else X)yTx8v4
data[cur]=temp[i2++]; lu>>~vy6
} ]\jhtC=2
} J@Li*Ypo
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} E5o0^^
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改进后的归并排序: _ pJU~8
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package org.rut.util.algorithm.support; C}!$'C|
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import org.rut.util.algorithm.SortUtil; Z?GC+hG`
aqMZ%~7
/** {ng
* @author treeroot >uQ!B/C!
* @since 2006-2-2 9u:MF0:W
* @version 1.0 9`b*Y*d
*/ tp1{)|pwY6
public class ImprovedMergeSort implements SortUtil.Sort { 5B51^"
>V]>h&`
private static final int THRESHOLD = 10; 5Zq- |"|
Me8d o; G|
/* F`-? 3]\3
* (non-Javadoc) LJBoS]~
* 0S'EnmG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t >8t|t+
*/ uZqo"
public void sort(int[] data) { d>(dSKx
int[] temp=new int[data.length]; eo@:@O+bm
mergeSort(data,temp,0,data.length-1); IlaH,J7n
} ^ML2xh
:!3P4?a
private void mergeSort(int[] data, int[] temp, int l, int r) { L\b$1U!i
int i, j, k; UP,(zKTA
int mid = (l + r) / 2; '8}\! i&
if (l == r) cd:O@)i
return; MHgS5b2
if ((mid - l) >= THRESHOLD) >`6^1j(3
mergeSort(data, temp, l, mid); 5Wn6a$^
else v+\E%H
insertSort(data, l, mid - l + 1); 7$^V_{ej
if ((r - mid) > THRESHOLD) N%^mR>.`
mergeSort(data, temp, mid + 1, r); fBQZ=zh
else {!=IGFe
insertSort(data, mid + 1, r - mid); wPV`j:?'
R+^/(Ws'<
for (i = l; i <= mid; i++) { w("jyvV[C
temp = data; #|'8O
} 2[WQq)\
for (j = 1; j <= r - mid; j++) { K[ylyQ1
temp[r - j + 1] = data[j + mid]; C~l5D4D#
} Sm-nb*ZyC
int a = temp[l]; s_RYYaM
int b = temp[r]; $+?6U
for (i = l, j = r, k = l; k <= r; k++) { 0|HhA,u
if (a < b) { /A_ IS`
data[k] = temp[i++]; 9gWQGkql
a = temp; a5&wS@) ;
} else { MT0}MMr
data[k] = temp[j--]; b?r0n]
b = temp[j]; %';n9M
} g:O.$
} 3 \kT#nr
} `pLp+#1 `R
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/** eNXpRvY
* @param data E fqa*,k
* @param l ;T/' CD
* @param i ~kYF/B2*
*/ RRV&!<l@$
private void insertSort(int[] data, int start, int len) { (2%C%#]8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2!jbaSH(+
} U:`rNHl
} | WDX@Q
} #8[,w.X
} %,>,J`
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堆排序： v}iJ:'
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package org.rut.util.algorithm.support; =r GkM.^
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import org.rut.util.algorithm.SortUtil; |px4a"
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/** >0512_J+
* @author treeroot T nPC\.x
* @since 2006-2-2 #{N#yReh
* @version 1.0 \Z)'':},C
*/ u |#ruFR
public class HeapSort implements SortUtil.Sort{ vnIxI a
J :,
/* (non-Javadoc) DrW]`%Ql
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FxD"z3D
*/ n)pBK>+
public void sort(int[] data) { uZ OUp8QQ
MaxHeap h=new MaxHeap(); pKp#4Js
h.init(data); EQ7cK63
for(int i=0;i h.remove(); OD*DHC2rN]
System.arraycopy(h.queue,1,data,0,data.length); y 5=J6a2.
} !rrjA$P<v
u} KiSZxt
private static class MaxHeap{ I</Nmgf
ECl[v%R/6
void init(int[] data){ R4{}ZT
this.queue=new int[data.length+1]; hf%W grO.
for(int i=0;i queue[++size]=data; @89mj{
fixUp(size); c-gaK\u}j}
} 5nEvnnx0
} slw^BK3t
1)k))w9
private int size=0; G|H\(3hHLZ
Y/{Z`}
private int[] queue; 6#dx%TC
.}j@(D
public int get() { \QHM7C T
return queue[1]; #He:p$43
} J,jl(=G
mD|<qsY)
public void remove() { 0E++
SortUtil.swap(queue,1,size--); KX*e2 /0
fixDown(1); ?t<wp3bZ
} W/J3sAYv
file://fixdown q^,^tw
private void fixDown(int k) { `GH6$\:
int j; ncihc$V<
while ((j = k << 1) <= size) { >o(*jZ
if (j < size %26amp;%26amp; queue[j] j++; CuDU~)`
if (queue[k]>queue[j]) file://不用交换 SR8[ 7MU
break; F[9IHT6{
SortUtil.swap(queue,j,k); SUx\qz)
k = j; ab 2V.S
} mQ1QJ_;
} d{DlW |_
private void fixUp(int k) { [rGR1>U?i
while (k > 1) { *mBn''a"*
int j = k >> 1; .i`+}@iA
if (queue[j]>queue[k]) u*H2kn[DU
break; $z` jR*
SortUtil.swap(queue,j,k); t+66kBN
k = j; J&h 3,
} k \]@
} 7rsrC
"%0RR?
} R(x%<I
rs\*$20
} 3DgI.V6un
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SortUtil： 6I 2`m(5
k%uRG_
package org.rut.util.algorithm; #bf^Pq'8
=(v/pLLK?
import org.rut.util.algorithm.support.BubbleSort; -Xx,"[sN\w
import org.rut.util.algorithm.support.HeapSort; o'R_kadN[T
import org.rut.util.algorithm.support.ImprovedMergeSort; K@W~
import org.rut.util.algorithm.support.ImprovedQuickSort; IgSe%B
import org.rut.util.algorithm.support.InsertSort; .8g&V|
import org.rut.util.algorithm.support.MergeSort; F5)Ta?3|"<
import org.rut.util.algorithm.support.QuickSort; yp!Xwq#n
import org.rut.util.algorithm.support.SelectionSort; ?p\'S w:
import org.rut.util.algorithm.support.ShellSort; NW^}u~-f
GAPZt4Z2
/** mo<g'|0
* @author treeroot hZ$* sf
* @since 2006-2-2 l*pCG`@J#
* @version 1.0 v]vrD2L
*/ .\< \J|3
public class SortUtil { `/Z8mFs Y
public final static int INSERT = 1; {T.$xiR
public final static int BUBBLE = 2; A:k`Ykr[
public final static int SELECTION = 3; JQI`9$asuC
public final static int SHELL = 4; %M~Ugv_4v
public final static int QUICK = 5; I]TL#ywF
public final static int IMPROVED_QUICK = 6; vUJb-
public final static int MERGE = 7; {:fyz#>>^
public final static int IMPROVED_MERGE = 8; bQ_i&t\yzB
public final static int HEAP = 9; Fa@#nY|UV3
=OhhMAn
public static void sort(int[] data) { gM_Z/$
sort(data, IMPROVED_QUICK); Pq;1EI
} +X.iJ$)
private static String[] name={ ZH.l^'(W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z=n& fsE
}; R%}OZJ_
Jd/5Kx
private static Sort[] impl=new Sort[]{ MI<hShc\
new InsertSort(), {hVSVx8ZL
new BubbleSort(), <9B43
new SelectionSort(), Vs m06Rj{
new ShellSort(), bm(0raugs
new QuickSort(), ^Fy) oWS
new ImprovedQuickSort(), Tf*X\{"
new MergeSort(), |+ @
new ImprovedMergeSort(), p5>TL!4M
new HeapSort() mN*9X[>x
}; mrk Q20D
nL@P{,J
public static String toString(int algorithm){ hg=\L5R
return name[algorithm-1]; _d)w, ;m#
} 0jE,=<W0>
rcNM,!dZ
public static void sort(int[] data, int algorithm) { Hya*7l']B
impl[algorithm-1].sort(data); (w@|:0t^y[
} d$b{KyUA
'}LH,H:%G
public static interface Sort { (w4#?_
public void sort(int[] data); m[]pIXc(
} P?\rRB
cXtL3T+
public static void swap(int[] data, int i, int j) { Q >)?_O(
int temp = data; 1*G7Uh@K}
data = data[j]; 7ugmZO}lL
data[j] = temp; @^#y23R U
} u.$.RkNMQ
} B% BO