[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; [Ep'm
} NC~?4F[
int i1=l; =i vlS
int i2=mid+1; f%EHzm/V
for(int cur=l;cur<=r;cur++){ *xxk70Cb
if(i1==mid+1) b, a7XANsh
data[cur]=temp[i2++]; 129\H< m
else if(i2>r) .Qrpz^wdt
data[cur]=temp[i1++]; }=EJM7sM|k
else if(temp[i1] data[cur]=temp[i1++]; `\VtTS
else d\>XfS
data[cur]=temp[i2++]; -& (iU#W
} \ 86g y/
} OD~Q|I(j
t4UK~ {gh
} LA;f,CQ
2!-Q!c`y
改进后的归并排序: c#{|sR5
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package org.rut.util.algorithm.support; 7_oUuNw
[;ZCq!)>
import org.rut.util.algorithm.SortUtil; H8w[{'Mei
CjPdN#*l
/** f@;pN=PS
* @author treeroot 3r+c&^
* @since 2006-2-2 VLm\PS
* @version 1.0 Ph P)|P
*/ ~4+Y BN
public class ImprovedMergeSort implements SortUtil.Sort { 'sIne>
O W.CU=XU
private static final int THRESHOLD = 10; w98M#GqV
VX8rM!3
/* 1_{e*=/y
* (non-Javadoc) \Ebh6SRp\
* b|AjB:G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wzy[sB274
*/ By6O@ .\V
public void sort(int[] data) { 1P"7.{
int[] temp=new int[data.length]; W)ug%@)
mergeSort(data,temp,0,data.length-1); 2 )o2d^^
} Ut2T:%m{
424iFc[
private void mergeSort(int[] data, int[] temp, int l, int r) { @>(JC]HtR
int i, j, k; kAp#6->(q
int mid = (l + r) / 2; v CsE|eMP
if (l == r) xKE=$SV(
return; !B Pm{_C
if ((mid - l) >= THRESHOLD) :2xGfy??
mergeSort(data, temp, l, mid); O$,
else X[h{g`
insertSort(data, l, mid - l + 1); })] iN"
if ((r - mid) > THRESHOLD) g5+m]3#t
mergeSort(data, temp, mid + 1, r); g8E5"jpXx3
else a^LckHPI>
insertSort(data, mid + 1, r - mid); ZB1%Kn#zo4
(5] [L<L
for (i = l; i <= mid; i++) { qery|0W
temp = data; }^$#vJ(a7K
} pmBN?<
for (j = 1; j <= r - mid; j++) { w!<e#Z]3b
temp[r - j + 1] = data[j + mid]; !x-__[#
} 3M?O(oO
int a = temp[l]; %1p-DX6
int b = temp[r]; %|x9C,0p#
for (i = l, j = r, k = l; k <= r; k++) { .BJoY <P*
if (a < b) { 3(K.:376
data[k] = temp[i++]; 8!35 K
a = temp; j)8$hK/e0.
} else { +mBS&FK
data[k] = temp[j--]; to).PI?
b = temp[j]; r&xIVFPI[
} O1jiD_Y!9
} x7e0&
} F^{31iU~CX
zf)*W#+
/** 4r_*: $g
* @param data '2Zs15)V
* @param l '%/=\Q`
* @param i y(<{e~
*/ AVLY|79#
private void insertSort(int[] data, int start, int len) { >|RoLV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "Ai\NC
} <LH6my
} \YJQN3^46>
} vbJdhaf
} ]0<K^OIY
Q[3hOFCX
堆排序： ,5<AV K-#Q
`vzMuL;
package org.rut.util.algorithm.support; +pSo(e(
!otseI!!/
import org.rut.util.algorithm.SortUtil; >a*dI_XE
M*n94L=Sg&
/** oMAUR "
* @author treeroot 6@lZVM)E
* @since 2006-2-2 VTR4uT-
* @version 1.0 z l`m1k-X
*/ ;yqHt!N
public class HeapSort implements SortUtil.Sort{ cg^~P-i@*
{9;-5@b
/* (non-Javadoc) *6<4ECa7C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ).GM0-y
*/ TR*vZzoy
public void sort(int[] data) { 0J[B3JO@M
MaxHeap h=new MaxHeap(); oMYFfnoAa
h.init(data); &Oz
for(int i=0;i h.remove(); 3%r/w7Fc
System.arraycopy(h.queue,1,data,0,data.length); PUD8
} ~pH!.|k-&
sa<\nH$_X
private static class MaxHeap{ ]O:u9If
5h Sd,#:
void init(int[] data){ 28M^F~0
this.queue=new int[data.length+1]; &b,A-1`w_
for(int i=0;i queue[++size]=data; dpchZ{
fixUp(size); r2tE!gMC
} =3% GLj
} vv)O+xt
Ok)f5")N %
private int size=0; I+W,%)vb
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private int[] queue; ^-Arfm%dn
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public int get() { W,,3@:
return queue[1]; 0iC5,
} 1,zc8>M
-#;ZZ\fdj
public void remove() { %L)QTv/
SortUtil.swap(queue,1,size--); BE&8E\w
fixDown(1); *1-0s*T
} HD{u#~8{
file://fixdown dg*xo9Xi`
private void fixDown(int k) { EJz!#f~
int j; . WJ
while ((j = k << 1) <= size) { Q~Nq5[
if (j < size %26amp;%26amp; queue[j] j++; +B8oW3v# )
if (queue[k]>queue[j]) file://不用交换 bUy!hS;s
break; dtV*CX.D.7
SortUtil.swap(queue,j,k); rFt+Y})
k = j; gkTwGI+w
} -;6uN\gq
} r$M<vo6C
private void fixUp(int k) { ^; U}HAY
while (k > 1) { \Js*>xA
int j = k >> 1; Nk%$;Si
if (queue[j]>queue[k]) XmwR^
break; HC/a
SortUtil.swap(queue,j,k); ~#so4<A`3
k = j; #~m^RoE
} Exv!!0Cd^
} ~ [/jk !G
WC_U'nTu4
} AK'3N1l`
m=COF$<
} F#Pn]
Je"XIhBr
SortUtil： :qR8 e J
U+ Yu_=o{
package org.rut.util.algorithm; E*tT^x)
2|1CGHj\
import org.rut.util.algorithm.support.BubbleSort; `B8`<3k/(
import org.rut.util.algorithm.support.HeapSort; <jFov`^
import org.rut.util.algorithm.support.ImprovedMergeSort; ZF#lh]
import org.rut.util.algorithm.support.ImprovedQuickSort; e{4e<hd
import org.rut.util.algorithm.support.InsertSort; 1W0[|Hf2v*
import org.rut.util.algorithm.support.MergeSort; ;*nzb!u\\
import org.rut.util.algorithm.support.QuickSort; DH$Nz
import org.rut.util.algorithm.support.SelectionSort; .2rpQa/h
import org.rut.util.algorithm.support.ShellSort; ;sUvY*Bcm
cw0@Z0
/** #jxPh!%9
* @author treeroot p}I\H ^"8+
* @since 2006-2-2 x6\VIP"9L
* @version 1.0 v13\y^t
*/ Mw+ l>92
public class SortUtil { 2.@IfBF6
public final static int INSERT = 1; JX>`N5s
public final static int BUBBLE = 2; $%&OaAg
public final static int SELECTION = 3; {pre|r\
public final static int SHELL = 4; (B@\Dw8^
public final static int QUICK = 5; )VG>6x
public final static int IMPROVED_QUICK = 6; -!T24/l
public final static int MERGE = 7; nnu#rtvZp}
public final static int IMPROVED_MERGE = 8; 6&LmR75C
public final static int HEAP = 9; XdlA)0S)
+#UawYLJ
public static void sort(int[] data) { >#T?]5Z'MF
sort(data, IMPROVED_QUICK); (bNoe(<qU
} \Q|,0`
private static String[] name={ 9,tk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cuf]-C1_
}; +uNMyVH
p? VDBAx
private static Sort[] impl=new Sort[]{ 0Nk!.gY
new InsertSort(), ?caHS2%?ae
new BubbleSort(), *cXi*7|=
new SelectionSort(), cV`NQt<W
new ShellSort(), v$;URF%^
new QuickSort(), a7b1c!
new ImprovedQuickSort(), U: <
new MergeSort(), J*%IvRg
new ImprovedMergeSort(), 3F6A.Ny
new HeapSort() &`]T#">
}; RA+M.
X}QcXc.d
public static String toString(int algorithm){ [oXr6M:
return name[algorithm-1]; @L607[!?
} 8{&.[SC7
%l%2 hvGZ
public static void sort(int[] data, int algorithm) { ?d3<GhzlR3
impl[algorithm-1].sort(data); w&hCtc
} [%Z{Mp'g
?aB%h |VA
public static interface Sort { }KftVnD?
public void sort(int[] data); &[PA?#I`
} E3CwA8)k
KNF{NFk
public static void swap(int[] data, int i, int j) { )C0Iy.N-
int temp = data; uXA}" f2
data = data[j]; r0\C2g_X
data[j] = temp; {8;}y[R
} B1Z;
} -" r4