[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; hQPNxpe
} <WCTJ!Z
int i1=l; +204.Yj?D
int i2=mid+1; M,(UCyT
for(int cur=l;cur<=r;cur++){ #V#sg}IhM?
if(i1==mid+1) _DAj$$ Ru4
data[cur]=temp[i2++]; ccm(r~lhJ
else if(i2>r) >2[nTfS
data[cur]=temp[i1++]; Vb$4'K'
else if(temp[i1] data[cur]=temp[i1++]; @b5zHXF83E
else RZrQ^tI3"
data[cur]=temp[i2++]; 5ON\Ve_H
} "GY/2;
} h.WvPZ2U
Ka|, qkb
} 9zs!rlzQ
u/S{^2`b
改进后的归并排序: 3X#)PX9b){
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package org.rut.util.algorithm.support; 1SO!a R#g
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import org.rut.util.algorithm.SortUtil; ,"U_oa3
oasEG6OI8
/** Eu)(@,]we
* @author treeroot ?X5Y8n]y\h
* @since 2006-2-2 }=T=Z#OgH
* @version 1.0 b<1+q{0r
*/ IyJHKDFk
public class ImprovedMergeSort implements SortUtil.Sort { %UnL,V9)
)ZqY`by!
private static final int THRESHOLD = 10; n)xLEx,
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/* eGr;PaG
* (non-Javadoc) x-%4-)
* TOC2[mc'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~&\}qz3
*/ f&ri=VJY\T
public void sort(int[] data) { U2TR>0l
int[] temp=new int[data.length]; (m%A>e B
mergeSort(data,temp,0,data.length-1); k3S
} i?0+f}5<p
k/]4L!/ T
private void mergeSort(int[] data, int[] temp, int l, int r) { 6X`i*T$.
int i, j, k; 5zk^zn)
int mid = (l + r) / 2; G,fh/E+
if (l == r) 'En|-M5
return; "s3eO
if ((mid - l) >= THRESHOLD) C0v1x=(xiM
mergeSort(data, temp, l, mid); (#?k|e"Y"`
else X+LG Z4]D
insertSort(data, l, mid - l + 1); R m^$Dn
if ((r - mid) > THRESHOLD) ecIZ+G)k
mergeSort(data, temp, mid + 1, r); & Y Y^Bd#
else !wNj;ST*
insertSort(data, mid + 1, r - mid); 'wm :Xa
M`u&-6
for (i = l; i <= mid; i++) { op5G}QZ
temp = data; !eE;MaS>
} ?vn9HhTD
for (j = 1; j <= r - mid; j++) { U?.cbB,
temp[r - j + 1] = data[j + mid]; Oll,;{<O
} %ok??_}$}q
int a = temp[l]; _G0_<WH6
int b = temp[r]; !${7)=|=1
for (i = l, j = r, k = l; k <= r; k++) { o.|P7{v}
if (a < b) { uzgQ_
data[k] = temp[i++]; JDp{d c
a = temp; yMVlTO
} else { ;FfDi*S7
data[k] = temp[j--]; 3 jRI@
b = temp[j]; K0xka[x=(
} <g3)!VR^q
} C(@#I7G
} r=74'g
(u:^4,Z
/** g*]/HS>e<G
* @param data hw9qnSeRy
* @param l |fIIfYE
* @param i m(DJ6CSa
*/ B3C%**~:e
private void insertSort(int[] data, int start, int len) { /;{E}`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sDXD>upO
} Svqj@@_f
} 9Q/t+
} qr<RMs
} kVeR{i<*(
jRGslak;
堆排序： 734f&2
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package org.rut.util.algorithm.support; bpgvLZb>s
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import org.rut.util.algorithm.SortUtil; s:ZYiZ-
k3yA*Ec
/** `WRM7
* @author treeroot $s.:H4:I
* @since 2006-2-2 j0`)mR}
* @version 1.0 ;vuqI5k
*/ ,$A'Y
public class HeapSort implements SortUtil.Sort{ {a9( Qi
' Ih f|;r
/* (non-Javadoc) z&KrG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JG/Pc1aK
*/ "&Rt&S
public void sort(int[] data) { 0(|Yy/Yq
MaxHeap h=new MaxHeap(); rHaj~s 4
h.init(data); )sZJH9[K
for(int i=0;i h.remove(); ?DrA@;IB
System.arraycopy(h.queue,1,data,0,data.length); =8V 9E
} \@!"7._=
hH(w O\s
private static class MaxHeap{ U]AJWC6
|w].*c}Z
void init(int[] data){ #T3dfVWv
this.queue=new int[data.length+1]; cKEDRX3
for(int i=0;i queue[++size]=data; !*G%vOa
fixUp(size); N(Sc!rX
} +oevNM
} \`U=pZJ
XT%\Ce!
private int size=0; 6"YcM:5~
pt$\pQ
private int[] queue; nr]:Y3KyxX
sOqT*gwr:
public int get() { hZ`<ID
return queue[1]; G$mAyK:
} 9_-6Lwj6t
5_7y1
public void remove() { Aw$+Ew[8 2
SortUtil.swap(queue,1,size--); ~J:]cy)Q
fixDown(1); iu.v8I;<
} B? Z_~Bf&
file://fixdown 9T#${NK
private void fixDown(int k) { %EH{p@nM&-
int j; lW|`8ykp
while ((j = k << 1) <= size) { W+Q^u7K
if (j < size %26amp;%26amp; queue[j] j++; z3Zo64V~7
if (queue[k]>queue[j]) file://不用交换 Q].p/-[(
break; (Cb;=:3G
SortUtil.swap(queue,j,k); of=N+ W
k = j; Mj6 0?k
} MAQ(PIc>T
} lc[)O3,,B
private void fixUp(int k) { (L<qJd1Q
while (k > 1) { G _-JR
int j = k >> 1; /*2)|2w
if (queue[j]>queue[k]) IqAML|C
break; [9^lAhX
SortUtil.swap(queue,j,k); ("KtJ
k = j; lG5KZ[/Or
} '\M]$`Et
} 5=_bK^Am
hQ ?zc_3
} fSF_O}kLp
cDIZkni=
} %#x l+^
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SortUtil： )uu(I5St
+L|x^B3
package org.rut.util.algorithm; b/"gUYo
>@)p*y.K
import org.rut.util.algorithm.support.BubbleSort; ryNe=9p
import org.rut.util.algorithm.support.HeapSort; 5=&ME(fmV
import org.rut.util.algorithm.support.ImprovedMergeSort; c!ieN9^+
import org.rut.util.algorithm.support.ImprovedQuickSort; J9-n3o
import org.rut.util.algorithm.support.InsertSort; FBxg^g%PB@
import org.rut.util.algorithm.support.MergeSort; $p|Im,
import org.rut.util.algorithm.support.QuickSort; ^Na3VP
import org.rut.util.algorithm.support.SelectionSort; M}e}3w
import org.rut.util.algorithm.support.ShellSort; OcLahz6
^r~O*
/** =P%?{7
* @author treeroot ;pj,U!{%s\
* @since 2006-2-2 -}u1ZEND
* @version 1.0 " GY3sam
*/ xzHb+1+p
public class SortUtil { [/o BjiBA
public final static int INSERT = 1; 8]mRX~
public final static int BUBBLE = 2; B$M4f7
public final static int SELECTION = 3; wk#cJ`wG;
public final static int SHELL = 4; lVCnu>8
public final static int QUICK = 5; $0R5 ]]db)
public final static int IMPROVED_QUICK = 6; Vi`P &uPF
public final static int MERGE = 7; KM"BHaSkF
public final static int IMPROVED_MERGE = 8; jO-T1P']Y
public final static int HEAP = 9; @ZRg9M:N
gBr/Y}I
public static void sort(int[] data) { 1~Z
sort(data, IMPROVED_QUICK); K@%gvLa\
} xX|f{)<
private static String[] name={ =QK ucLo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z((e-T#,
}; tA]u=-_h
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private static Sort[] impl=new Sort[]{ %l?*w~x
new InsertSort(), $*`E;}S0
new BubbleSort(), &NOCRabc
new SelectionSort(), VTU(C&"S
new ShellSort(), eA*We
new QuickSort(), fA"c9(>m%]
new ImprovedQuickSort(), k t'[
new MergeSort(), //0Y#"
new ImprovedMergeSort(), :k-@w5(
new HeapSort() g/(BV7V
}; {#~A `crO
-<L5;
public static String toString(int algorithm){ wrc1N?[bn
return name[algorithm-1]; 8"TlWHF`
} jn`5{ ]D
W[sQ_Z1C
public static void sort(int[] data, int algorithm) { z%BX^b$Hj
impl[algorithm-1].sort(data); E@EP9X >
} -24ccN;
M3Qi]jO98
public static interface Sort { I@5$<SN
public void sort(int[] data); YC$>D?FW
} K4-_a{)/
0"Euf41
public static void swap(int[] data, int i, int j) { cc3/XBo
int temp = data; w/:ibG@
data = data[j]; T(,@]=d,DD
data[j] = temp; J:J/AgJuH
} fda4M
} <,Pl31g^