[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; zh{:zT)(1
} h!>K[*
int i1=l; %3ieR}:/e&
int i2=mid+1; s48 { R4
for(int cur=l;cur<=r;cur++){ CFo>D\*J
if(i1==mid+1) nIWZo ~
data[cur]=temp[i2++]; tCoT-\Q
else if(i2>r) [^rMM1^,OB
data[cur]=temp[i1++]; (P=q&]l[
else if(temp[i1] data[cur]=temp[i1++]; j>D[iHrH
else wtm=
data[cur]=temp[i2++]; j,:vK
} B)^uGSW
} J 'qhY'te
o3=2`BvJ
} 1MVzu7
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改进后的归并排序: \xtY\q,[
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package org.rut.util.algorithm.support; ONc-jU^
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import org.rut.util.algorithm.SortUtil; gGdt&9z %
/b ]Yya#
/** 2.6F5&:($
* @author treeroot "$@Wy,yp
* @since 2006-2-2 5(+9( \x
* @version 1.0 -FxE!K
*/ JZc"4qf@OT
public class ImprovedMergeSort implements SortUtil.Sort { d z-
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private static final int THRESHOLD = 10; -c_}^j
5:"zs
/* mmf}6ABYT
* (non-Javadoc) XkGS3EY
* .YYLMI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J.t tJOP
*/ =zetZJg
public void sort(int[] data) { 0vi)my;!
int[] temp=new int[data.length]; =Su~iOa
mergeSort(data,temp,0,data.length-1); n#\ t_/\
} N51g<K
L5wrc4
private void mergeSort(int[] data, int[] temp, int l, int r) { szZ8-Y
int i, j, k; 7QnQ=gu
int mid = (l + r) / 2; i,3[0*ge
if (l == r) =~|:93]k
return; Zo12F**{
if ((mid - l) >= THRESHOLD) 2PaRbh{"
mergeSort(data, temp, l, mid); *F_ dP
else nKR=/5a4Y
insertSort(data, l, mid - l + 1); 6/4?x)l3-
if ((r - mid) > THRESHOLD) =W*Js%4
mergeSort(data, temp, mid + 1, r); }\-"L/D?+
else \os iY^
insertSort(data, mid + 1, r - mid); JsDugn ,B
e [}m@a
for (i = l; i <= mid; i++) { BZdryk:S
temp = data; |^&j'k+A
} Ho_ 2zx:8b
for (j = 1; j <= r - mid; j++) { mh5ozv$
temp[r - j + 1] = data[j + mid]; +6i~Rx>
} 7K.in3M(
int a = temp[l]; !+F6Bf
int b = temp[r]; Bkq3-rX\
for (i = l, j = r, k = l; k <= r; k++) { ea\b7a*
if (a < b) { |o5F%1o
data[k] = temp[i++]; ~"IjT'W3
a = temp; xklXV
} else { P.j0Xlof
data[k] = temp[j--]; })Pq!u:3
b = temp[j]; Y+[Z,
} L)mb.U$`c|
} r6u) 6J=
} A/xo'G
<*4'H
/** |cBeyqr
* @param data E\GD hfTQ
* @param l dM^1O-K:
* @param i }}cS-p
*/ 1vmK d
private void insertSort(int[] data, int start, int len) { HHZGu8tzt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $%%K9Y
} ~?BN4ptc
} R, J(]ew
} doj$chy
} >axf_k
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堆排序： bVbh| AA
hj<h]dhp
package org.rut.util.algorithm.support; 0>aAI3E
lY,dyNFHV
import org.rut.util.algorithm.SortUtil; "=/YPw^0
x9lG$0k:V
/** n}T;q1
* @author treeroot =Eimbk
* @since 2006-2-2 3r]m8Hp
* @version 1.0 GK>.R<[
*/ iW\Q>~0#_
public class HeapSort implements SortUtil.Sort{ kzUP
K9@F1ccQ/
/* (non-Javadoc) ]-7$wVQ<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <"SOH;w
*/ |+|q`SwJ
public void sort(int[] data) { 13lJq:bM
MaxHeap h=new MaxHeap(); Hyj<Fqr!.
h.init(data); Vw P+tM
for(int i=0;i h.remove(); <,Z6=M`
System.arraycopy(h.queue,1,data,0,data.length); "F.0(<4)
} YR\pt8(z?
$v#\bqY
private static class MaxHeap{ VEtdp*ot
MD62ObK!
void init(int[] data){ $vQ#ah/k
this.queue=new int[data.length+1]; |oL}c!0vs
for(int i=0;i queue[++size]=data; .8I\=+Zi
fixUp(size); T*'?;u
} %~$P.Zh
} w:0=L`<Eu
jIOrB}
private int size=0; x U1](O
B>!OW2q0D
private int[] queue; G[[hC[}I
;hcOD4or
public int get() { uv}?8$<\
return queue[1]; 10C,\
} }0%~x,
2VY.#9vl
public void remove() { m&36$>r=
SortUtil.swap(queue,1,size--); B,f4<
fixDown(1); ~Ip-@c}'j
} OZ'=Xtbn
file://fixdown 7H~J?_
private void fixDown(int k) { ap7ZT7KW
int j; O`pqS\H
while ((j = k << 1) <= size) { ,$xV&w8f\"
if (j < size %26amp;%26amp; queue[j] j++; FU~xKNr
if (queue[k]>queue[j]) file://不用交换 oOj7y>Nm
break; aSy^(WN8
SortUtil.swap(queue,j,k); wk'12r6=(-
k = j; K:osfd
} ;]/emw=a
} |v[0(
private void fixUp(int k) { /&`sB|
while (k > 1) { f=f8)+5
int j = k >> 1; y7?n;3U]CS
if (queue[j]>queue[k]) ioZ{2kK
break; X,Q'Xe/
SortUtil.swap(queue,j,k); 1_aUU,|.
k = j; x bsk
} 8^8fUN4<=
} 2(<2Gnpl
{ !;I4W%!
} 2c Pd$j
l[G&=/R@H
} h:J0d~u
vs`"BQYf
SortUtil： t\/i9CBn
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package org.rut.util.algorithm; i 1{Lx)
vfn _Nq;
import org.rut.util.algorithm.support.BubbleSort; ^)|!nd
import org.rut.util.algorithm.support.HeapSort; 6~t;&)6J
import org.rut.util.algorithm.support.ImprovedMergeSort; M$O*@])
import org.rut.util.algorithm.support.ImprovedQuickSort; W'B=H1
import org.rut.util.algorithm.support.InsertSort; AD** 4E
import org.rut.util.algorithm.support.MergeSort; [nx OGa2
import org.rut.util.algorithm.support.QuickSort; \bc ob8u
import org.rut.util.algorithm.support.SelectionSort; ks}J ke>
import org.rut.util.algorithm.support.ShellSort; d5hYOhO[
&m8#^]*
/** Tgf#I*(^]
* @author treeroot dkr[B'n
* @since 2006-2-2 8H%-/2NW
* @version 1.0 WFYbmfmV
*/ .d4L@{V
public class SortUtil { 9;L5#/E
public final static int INSERT = 1; fs:%L
public final static int BUBBLE = 2; \9Z1'W
public final static int SELECTION = 3; ,/XeG`vk
public final static int SHELL = 4; jIzkI)WC|
public final static int QUICK = 5; K]
public final static int IMPROVED_QUICK = 6; mw[T[
public final static int MERGE = 7; HVq02 Z
public final static int IMPROVED_MERGE = 8; 6G^x%s
public final static int HEAP = 9; Q|gRBu
O>h,u[0
public static void sort(int[] data) { 3[RP:W@%
sort(data, IMPROVED_QUICK); T@S\:P
} re$xeq\1P?
private static String[] name={ $CXMeY{tOo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `[&) X
}; 5f` a7R
^uDNArDmj5
private static Sort[] impl=new Sort[]{ n B5:X
new InsertSort(), doERBg`Jh
new BubbleSort(), MHm=X8eg
new SelectionSort(), x$6`k
new ShellSort(), ~$bkWb*RJ
new QuickSort(), 0# )I:5
new ImprovedQuickSort(), r}9a31i
new MergeSort(), swfcA\7R
new ImprovedMergeSort(), 3Y L
new HeapSort() Hju7gP=y}
}; lU}y%J@
U@6bH@v5
public static String toString(int algorithm){ xYgG
return name[algorithm-1]; _`H2CXGg
} g}vOp3^
`2B,+ytW8
public static void sort(int[] data, int algorithm) { QXQ'QEG
impl[algorithm-1].sort(data); e1EFZ,EcaO
} kPt] [1jo
y,i ~w |4
public static interface Sort { U:a-Wi+
public void sort(int[] data); 5*q!:$ W
} _>6xUt
,D6hJ_:
public static void swap(int[] data, int i, int j) { Ez= Q{g
int temp = data; e13{G@
data = data[j]; Zgw;AY.R>
data[j] = temp; 7eM:YqT/#
} T~238C{vh
} o9j*Yz