[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; 7JSNYTH
} eNiaM6(J
int i1=l; jA#/Z
int i2=mid+1; [r/k% <
for(int cur=l;cur<=r;cur++){ FI"`DMb}
if(i1==mid+1) Kscd}f)yx?
data[cur]=temp[i2++]; "UwH\T4I
else if(i2>r) czlFr|O;
data[cur]=temp[i1++]; 1s1=rZ!
else if(temp[i1] data[cur]=temp[i1++]; 5U_H>oD
else 5SkW-+$
data[cur]=temp[i2++]; 5>AX*]c
} T{wuj[Q#:
} \M'-O YH_[
)Ud-}* g
} L@JOGCYy
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改进后的归并排序: #07gd#j4
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package org.rut.util.algorithm.support; 5q"ON)x
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import org.rut.util.algorithm.SortUtil; +l=r#JF
mZ1)wH,
/** Z,iHy3`
* @author treeroot u1xSp<59C
* @since 2006-2-2 G%d (
* @version 1.0 ioPUUUb)
*/ .f+TZDUO
public class ImprovedMergeSort implements SortUtil.Sort { )E+'*e{cK
%'0TXr$
private static final int THRESHOLD = 10; #p[',$cC
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/* uYrfm:4S
* (non-Javadoc) MQin"\
* @3kKJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {}:ToIp
*/ $['Bv
public void sort(int[] data) { \=>H6x]q
int[] temp=new int[data.length]; ^k<oT'89
mergeSort(data,temp,0,data.length-1); %/updw#{B
} LkQX?2>]
|>z3E z
private void mergeSort(int[] data, int[] temp, int l, int r) { ]~Y<o
int i, j, k; T6ENtp
int mid = (l + r) / 2; )?wJF<[_#
if (l == r) ;2Q~0a|
return; ws^4?O
if ((mid - l) >= THRESHOLD) sUE?v9
mergeSort(data, temp, l, mid); @?"h !fyu
else KN-avu_Ix
insertSort(data, l, mid - l + 1); mS0udHod
if ((r - mid) > THRESHOLD) }`+B=h-dW
mergeSort(data, temp, mid + 1, r); ``E/m<r:$
else }<'5 z qS
insertSort(data, mid + 1, r - mid); F5o+kz$;
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for (i = l; i <= mid; i++) { } (!EuLL
temp = data; }%D^8>S
} LY+|[qka
for (j = 1; j <= r - mid; j++) { |*`Z*6n
temp[r - j + 1] = data[j + mid]; VE8;sGaJ
} 0@AAulRl
int a = temp[l]; `=7j$#6U
int b = temp[r]; ;j2vHU#q-
for (i = l, j = r, k = l; k <= r; k++) { Qyy.IPTP
if (a < b) { kY'T{Sm1^
data[k] = temp[i++]; LiKxq=K
a = temp; }- Wa`t7U
} else { "*})3['n
data[k] = temp[j--]; rb{P :MX
b = temp[j]; jbR0%X2
} E\C9|1)
} K(q-?n`<
} *YlV-C<}W"
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/** "le>_Ze_>|
* @param data 1IVuSp`{FU
* @param l tY <Z'xA?
* @param i VcoOeAKL
*/ *_?dVhxf
private void insertSort(int[] data, int start, int len) { 0:b2(^]bg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RVeEkv[qp
} Gdg"gi!4
} Ge<nxl<Bd
} @]ao"ui@/
} : "1XPr
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堆排序： ~,*b }O
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package org.rut.util.algorithm.support; `:axzCrCfR
\m1~jMz*>k
import org.rut.util.algorithm.SortUtil; u,6~qQczE
}3?n~s\)6f
/** \_B[{e7z
* @author treeroot %RDI!e<e}
* @since 2006-2-2 {P*m;a`}
* @version 1.0 h9eMcCU
*/ 5ls6t{Ci
public class HeapSort implements SortUtil.Sort{ -{ZWo:,r~q
0tU.(
/* (non-Javadoc) QV\eMuNy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ` Jdb;
*/ ~s5SZK*
public void sort(int[] data) { F+u|HiYG
MaxHeap h=new MaxHeap(); ,{c?ymw?
h.init(data); >;[*!<pfK5
for(int i=0;i h.remove(); Phke`3tth
System.arraycopy(h.queue,1,data,0,data.length); [Jv@J\
} #t+d iR
f%*/cpA)
private static class MaxHeap{ 8]LD]h)B"
Z4\=*ic@
void init(int[] data){ w4gg@aO
this.queue=new int[data.length+1]; |iwP:C^\mJ
for(int i=0;i queue[++size]=data; _]:z \TDn
fixUp(size); V5rST +
} KY~-;0x
} o>VVsH
G["c\Xux
private int size=0; w`5xrqt@
s)pbS}L
private int[] queue; Sm5H_m!
' MxrQ;|S
public int get() { ,S!azN=
return queue[1]; O6OP =K!t:
} F|!){=
1@-Ns
public void remove() { <%"b9T`'
SortUtil.swap(queue,1,size--); hq #?kN
fixDown(1); ?F3h)(}
} G nG>7f[v
file://fixdown qo|WXwP2
private void fixDown(int k) { =y-@AU8
int j; &Udb9
while ((j = k << 1) <= size) { a0#J9O_
if (j < size %26amp;%26amp; queue[j] j++; (I./ Uu%
if (queue[k]>queue[j]) file://不用交换 }1upi=+aE
break; 1aTB%F
SortUtil.swap(queue,j,k); :*KHx|Q
k = j; <Sr
} w.TuoWo>
} N}t 2Nu-
private void fixUp(int k) { \7'+h5a
while (k > 1) { 0ik7v<:
int j = k >> 1; 9_5ow
if (queue[j]>queue[k]) |/)${*a4n
break; KGFv"u{
SortUtil.swap(queue,j,k); ;4pYK@9w_
k = j; q0zr E5
} sjV!5Z
} n~V ]Z
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} @8I4[TE
;N?]eM}yf
} p|p l
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SortUtil： ;67x0)kn
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package org.rut.util.algorithm; !/]WrGqbS
|mw.qI|
import org.rut.util.algorithm.support.BubbleSort; =UfsL%
import org.rut.util.algorithm.support.HeapSort; W*I(f]8:y`
import org.rut.util.algorithm.support.ImprovedMergeSort; ?o|f':
import org.rut.util.algorithm.support.ImprovedQuickSort; e0,|Wm
import org.rut.util.algorithm.support.InsertSort; q}?4f*WC
import org.rut.util.algorithm.support.MergeSort; ys kO
import org.rut.util.algorithm.support.QuickSort; Z'7
import org.rut.util.algorithm.support.SelectionSort; P`cq H(
import org.rut.util.algorithm.support.ShellSort; ?BZPwGMs
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/** j=r P:#
* @author treeroot @pRlxkvV
* @since 2006-2-2 tu66'z
* @version 1.0 *(T:,PY
*/ /$p6'1P8
public class SortUtil { R1$:~p2m
public final static int INSERT = 1; m()RU"WY
public final static int BUBBLE = 2; 2HsLc*9{4
public final static int SELECTION = 3; ,tu.2VQc@
public final static int SHELL = 4; |$ lM#Ua
public final static int QUICK = 5; @X;!92i
public final static int IMPROVED_QUICK = 6; /k,-P
public final static int MERGE = 7; >E{";C)
public final static int IMPROVED_MERGE = 8; /Y2}a<3&0
public final static int HEAP = 9; U ^5Kz-5.
_ =VqrK7T
public static void sort(int[] data) { LoN< oj5
sort(data, IMPROVED_QUICK); T~##,qQ
} DrY:9[LP
private static String[] name={ ]Hefm?9*^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j~jV'f.:H
}; =*c7i]@}
.7avpOfz
private static Sort[] impl=new Sort[]{ A#J`;5!Sc
new InsertSort(), lHPd"3HDK
new BubbleSort(), f\sQO&
new SelectionSort(), ]\hSI){
new ShellSort(), dQA'($
new QuickSort(), 9CWezI+
new ImprovedQuickSort(), )9"_J9G
new MergeSort(), r\-uJ~8N
new ImprovedMergeSort(), b((M)Gz
new HeapSort() {CGUL|y
}; 2Ay*kmW
>\P@^ h]
public static String toString(int algorithm){ wc}5m Hs
return name[algorithm-1]; %,@e^3B
} zkuU5O
eo?;`7
public static void sort(int[] data, int algorithm) { o.!~8mD
impl[algorithm-1].sort(data); 7`zHX&-W
} ?IqQ-C)6D
OuID%p"O
public static interface Sort { ogHCt{'
public void sort(int[] data); Tz8PSk1[
} v50bdj9}k
#mCL) [
public static void swap(int[] data, int i, int j) { ~5%W:qwQ
int temp = data; xqG[~)~
data = data[j]; NflD/q/ L
data[j] = temp; \F/hMXDlJ
} x7!L{(E3
} %\dz m-d(C