[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; pj?+cy v~
} 3yZtyXRPn
int i1=l; :*)~nPVV
int i2=mid+1; 1sGkbfh{t
for(int cur=l;cur<=r;cur++){ s80:.B
if(i1==mid+1) z,I7 PY& G
data[cur]=temp[i2++]; "Yq-s$yBi
else if(i2>r) 2W$c%~j$2
data[cur]=temp[i1++]; -gv@ .#N
else if(temp[i1] data[cur]=temp[i1++]; XDz![s
else {jJUS>
data[cur]=temp[i2++]; V-O49
} #xm<|s
} Cdotl$'
D0us<9q
} ^qy$M>
M!;H3*
改进后的归并排序: 1Jd82N\'
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package org.rut.util.algorithm.support; "7l p|0I
* j:
import org.rut.util.algorithm.SortUtil; &5O
hy3[MOD$G
/** T5Sa9\`>
* @author treeroot [/6$P[
* @since 2006-2-2 k_-=:(Z
* @version 1.0 lVARe3#
*/ 9kH~+
public class ImprovedMergeSort implements SortUtil.Sort { C>:F4"0
S%kE<M?
private static final int THRESHOLD = 10; rs=wEMq/
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/* Xi4!7IOmo
* (non-Javadoc) f?2Y np=@
* s~IOc%3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N 2L/A
*/ `P)1RTVx
public void sort(int[] data) { w`c9_V
int[] temp=new int[data.length]; va95/(
mergeSort(data,temp,0,data.length-1); o3]B/
} &&M-5XD
;]i&AAbj
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Qkto4DQ5
int i, j, k; \G#Qe*"'K
int mid = (l + r) / 2; jF Bq>
if (l == r) bqsb (C
return; ^ Gq2"rDM
if ((mid - l) >= THRESHOLD) *P61q\2Z
mergeSort(data, temp, l, mid); i"F'n0*L
else +r2E5s
insertSort(data, l, mid - l + 1); f8lBxK
if ((r - mid) > THRESHOLD) HP3~.1Sp
mergeSort(data, temp, mid + 1, r); 8rGW G
else ^h1VCyoR*
insertSort(data, mid + 1, r - mid); N#bWMZ"
(=QaAn,,R
for (i = l; i <= mid; i++) { 7I&7YhFI
temp = data; {QM;%f
} DcQ^V4_
for (j = 1; j <= r - mid; j++) { oZA|IF8U0
temp[r - j + 1] = data[j + mid]; A0V"5syY
} wkdd&Nw;
int a = temp[l]; 2t< dCw
int b = temp[r]; PxfeU2^{0
for (i = l, j = r, k = l; k <= r; k++) { lqF{Y<l
if (a < b) { o~NeS|a
data[k] = temp[i++]; l(v$+
a = temp; l#\z3"b
} else { !6@xX08z
data[k] = temp[j--]; {l0;G)-
b = temp[j]; rPaD#GA[7
} #E{aN?_
} 6mep|![6
} bhOyx
oeDsJ6;
/** .sbU-_ij@U
* @param data 9(|[okB
* @param l zv@'x nY]
* @param i ojs&W]r0Z
*/ i\3BA"ZX
private void insertSort(int[] data, int start, int len) { -102W{V/T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s|pb0
} j+Y4>fL$
} Gqk"%irZ
} HAf.LdnzS
} ![7v_l\Q
6zRJ5uI,/
堆排序： YUT"A{L
,h#!!j\j6
package org.rut.util.algorithm.support; W#u}d2mP
>u*woNw(XM
import org.rut.util.algorithm.SortUtil; d=oOMXYa
I%e7:cs>
/** JV36@DVQ
* @author treeroot c5;YKON
* @since 2006-2-2 cuq7eMG6z
* @version 1.0 Y@9L8XNP>
*/ DECX18D
public class HeapSort implements SortUtil.Sort{ vEtogkFA"
qt^%jIv
/* (non-Javadoc) $C9<{zX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Co[[6pt~
*/ R:E6E@T
public void sort(int[] data) { <j:3<''o
MaxHeap h=new MaxHeap(); XhWMvme
h.init(data); iV'-j,-i
for(int i=0;i h.remove(); v0"|J3
System.arraycopy(h.queue,1,data,0,data.length); I;P?P5H
} z9w@-])
yC+N18y?
private static class MaxHeap{ 2Mu-c:1
k5!k3yI
void init(int[] data){ e&;c^Z
this.queue=new int[data.length+1]; +FY-r[_~
for(int i=0;i queue[++size]=data; )tFFa*Z'
fixUp(size); f910drg7
} %bDd
} "sT`Dhr
^}/YGAA
private int size=0; 5\R8>G~H
*XniF~M
private int[] queue; qgI Jg6x/}
;jX_e(T3m
public int get() { =!#DUfQf
return queue[1]; aI8wy-3I
} %(6f
mKe{y.
public void remove() { \lKQDct. -
SortUtil.swap(queue,1,size--); LaN4%[;X1-
fixDown(1); ]3d&S5zU
} a Q`a>&R0
file://fixdown ( fdDFb#1
private void fixDown(int k) { ;Ic3th%u
int j; !PUhdW
while ((j = k << 1) <= size) { }{K)5k@
if (j < size %26amp;%26amp; queue[j] j++; @'C)ss=kj
if (queue[k]>queue[j]) file://不用交换 h@{@OAu?
break; a.%]5%O;t
SortUtil.swap(queue,j,k); X){F^1CT{
k = j; `d OjCA_&
} pM(y?zGt
} :\4O9f*5+
private void fixUp(int k) { +%U@
while (k > 1) { u52;)"&=)
int j = k >> 1; g-+p(Ll|
if (queue[j]>queue[k]) N..9N$+(
break; ~RvU+D
SortUtil.swap(queue,j,k); e% 5!
k = j; M\`6H8aLn
} 6bHj<6>MX
} .*Hv^_
A]H+rxg
} ^<y$+HcH
QRdb~f;<hj
} n8:2Z>
.-RWlUe;,
SortUtil： ]nfS vPb
N"E\o,_
package org.rut.util.algorithm; ioa 1n=j
3>L1}zyM]
import org.rut.util.algorithm.support.BubbleSort; L {B#x@9tQ
import org.rut.util.algorithm.support.HeapSort; L"}@>&6
import org.rut.util.algorithm.support.ImprovedMergeSort; (_nkscf
import org.rut.util.algorithm.support.ImprovedQuickSort; jU4Ir{f
import org.rut.util.algorithm.support.InsertSort; l" sR\`~
import org.rut.util.algorithm.support.MergeSort; }DZkCzK
import org.rut.util.algorithm.support.QuickSort; <m@U`RFm
import org.rut.util.algorithm.support.SelectionSort; F&cA!~
import org.rut.util.algorithm.support.ShellSort; :"QRB#EC%
@kqy!5)K
/** X='4N<
* @author treeroot 2ZE4^j|
* @since 2006-2-2 P `2Rte6s
* @version 1.0 (>;~((2
*/ \H" (*["&
public class SortUtil { IL>g-
public final static int INSERT = 1; Wq,UxMz
public final static int BUBBLE = 2; *-P@|eg
public final static int SELECTION = 3; B"Fg`s+]U
public final static int SHELL = 4; ||!k 3t#<
public final static int QUICK = 5; ^8MgNVoJ)
public final static int IMPROVED_QUICK = 6; |=h>3Z=r!
public final static int MERGE = 7; `q xg
public final static int IMPROVED_MERGE = 8; As)-a5!
public final static int HEAP = 9; jXW71$B
=%]dk=n?TN
public static void sort(int[] data) { ")sq?1?X
sort(data, IMPROVED_QUICK); ~?L. n:wu
} el[6E0!@
private static String[] name={ w\@Anwj#L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^3r2Q?d\
}; z ,ledTl
a(J~:wgd
private static Sort[] impl=new Sort[]{ oa9T3gQ?
new InsertSort(), \7/xb{z|
new BubbleSort(), DAvAozM
new SelectionSort(), .d8~]@U!<
new ShellSort(), }RyYzm2
new QuickSort(), |UlScUI,
new ImprovedQuickSort(), E4{^[=}
new MergeSort(), kwyvd`J8
new ImprovedMergeSort(), ^T<<F}@q
new HeapSort() #K4wO!d
}; 6'Lij&,f?{
7M$>'PfO
public static String toString(int algorithm){ T %cN(0@
return name[algorithm-1]; FJ2^0s/"
} 2^:5aABQ
3F4I{L
public static void sort(int[] data, int algorithm) { GQ[\R&]q<
impl[algorithm-1].sort(data); /#Xz+#SqY
} 9wI1/>
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public static interface Sort { C"F(kgL
public void sort(int[] data); 8<g5.$xyz
} #cmj?y()
: 0%V:B
public static void swap(int[] data, int i, int j) { ( E0be.
int temp = data; k@wxN!w;
data = data[j]; zb9$
data[j] = temp; 7%?A0%>6G
} yt<K!=7&
} ^ 5UIbA(