[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; pM3BBF%
} 6Tnzg`0I
int i1=l; 9v0|lS!-
int i2=mid+1; Nig-D>OS
for(int cur=l;cur<=r;cur++){ FeLP!oS>
if(i1==mid+1) B?Skw{&
data[cur]=temp[i2++]; (%}C
else if(i2>r) 67?5Cv
data[cur]=temp[i1++]; qZe"'"3M
else if(temp[i1] data[cur]=temp[i1++]; zdE^v{}|
else /+msrrpD
data[cur]=temp[i2++]; |e\%pfZ
} Lw`\J|%p
} {J$aA6t:"T
$!Tw`O
} @@jdF-Utj;
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改进后的归并排序: 1S.~-K*X
':3KZ4/C
package org.rut.util.algorithm.support; 2X_ef
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import org.rut.util.algorithm.SortUtil; !=:c8V
Sqs`E[G*
/** x#D=?/~/Kv
* @author treeroot 3 6 ;hg#
* @since 2006-2-2 >Fz$DKr[
* @version 1.0 HV@:!zM
*/ intf%T5#
public class ImprovedMergeSort implements SortUtil.Sort { P>|2~YxjU
hh9{md\
private static final int THRESHOLD = 10; #eYVZ=E
iq$/6!t
/* /eQn$ZRP,
* (non-Javadoc) %L3]l
* Pp2)P7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N;Bal/kd2
*/ eAMT72_
public void sort(int[] data) { zKNk(/y
int[] temp=new int[data.length]; `Nj|}^A
mergeSort(data,temp,0,data.length-1); )T?ryp3ev
} KXJHb{?
GSp1,E2J
private void mergeSort(int[] data, int[] temp, int l, int r) { YbKW;L&Ff
int i, j, k; 8T4J^6
int mid = (l + r) / 2; PJ{.jWwD
if (l == r) 7 <xxOY>y
return; |Bp?"8%*l
if ((mid - l) >= THRESHOLD) /!hW6u5
mergeSort(data, temp, l, mid); $Tg$FfD6&
else ;QYK {3R?
insertSort(data, l, mid - l + 1); q)*0G*
if ((r - mid) > THRESHOLD) ArY'NE\Htt
mergeSort(data, temp, mid + 1, r); Z>l>@wNm
else L6^h3*JyD
insertSort(data, mid + 1, r - mid); s6B@:9
Ty=}A MMyE
for (i = l; i <= mid; i++) { kbY@Y,:w
temp = data; [C$ 0HW
} #_d%hr~d
for (j = 1; j <= r - mid; j++) { }1V&(#H2
temp[r - j + 1] = data[j + mid]; |($pXVLH`
} tz,FK;8
int a = temp[l]; ?D_zAh?pW
int b = temp[r]; _D~a4tgS
for (i = l, j = r, k = l; k <= r; k++) { k{~5pxd-t
if (a < b) { V;"'!dVX
data[k] = temp[i++]; nFqMS|EN
a = temp; LdOB[W
} else { Dng^4VRd
data[k] = temp[j--]; >qE$:V"_5
b = temp[j]; t`Sh!e
} U&6f}=vC
} [#:k3aFz
} Ev%\YI!MaY
<$ 5\^y,V
/** 3r\QLIr L8
* @param data F}X_I
* @param l P1t5-q
* @param i '&9b*u";x(
*/ ;>~iCFk]?
private void insertSort(int[] data, int start, int len) { mS0W@#|K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wh,kJis<
} &~i1 @\]
} *4ID$BmO
} (<h,R@:
} "P6MLf1
/W9=7&R0
堆排序： <XNLeJdY
y.zW>Mfl
package org.rut.util.algorithm.support; {}z7N~
r* U6govky
import org.rut.util.algorithm.SortUtil; PJ'l:IU
B4kIcHA
/** O'k"6sBb
* @author treeroot b#sO1MXv
* @since 2006-2-2 ZM"t.
* @version 1.0 OHU(?TBo
*/ q45n.A6a
public class HeapSort implements SortUtil.Sort{ 344- ~i*
%\A~w3E
/* (non-Javadoc) ?1YK-T@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q8_d]V=X:
*/ Q-\: u~
public void sort(int[] data) { uZfo[_g0S
MaxHeap h=new MaxHeap(); j0J6ySlY
h.init(data); 8=d9*lm
for(int i=0;i h.remove(); \|Mz'*
System.arraycopy(h.queue,1,data,0,data.length); di|l?l^l
} ~%]+5^Ka]
O_~\$b
private static class MaxHeap{ v"`w'+
sS._N@f
void init(int[] data){ 7*sB"_U2
this.queue=new int[data.length+1]; Qi9SN00F.
for(int i=0;i queue[++size]=data; RW'QU`N[Y
fixUp(size); zR%#Q_
} , vWcWT
} /wQDcz
@ Fu|et
private int size=0; #(%6urd
QgP UP[
private int[] queue; B9]KC i
i9d.Ls
public int get() { #soWX_>
return queue[1]; #(OL!B
} bS*9eX=K
8"+Kz
public void remove() { L!\I>a5C0G
SortUtil.swap(queue,1,size--); cG.4%Va@s_
fixDown(1); +BESO
} Lx.X#n.]T
file://fixdown RJ`F2b sYN
private void fixDown(int k) { -0Ps.B
int j; '2eggX%
while ((j = k << 1) <= size) { [l0>pHl@
if (j < size %26amp;%26amp; queue[j] j++; OmsNo0OA
if (queue[k]>queue[j]) file://不用交换 FbF P
break; (f7R~le
SortUtil.swap(queue,j,k); &T{+B:*v
k = j; yJ?6BLJi
} ~x2azY2DP
} _di[PU=Vh
private void fixUp(int k) { Au9Rr3n
while (k > 1) { aPRF
int j = k >> 1; BV|LRB}G
if (queue[j]>queue[k]) "lB[IB)
break; o]@?QAu
SortUtil.swap(queue,j,k); bO9X;}\6
k = j; |(]XZ!{
} 5~v({R.
} `rvS(p[s
{q:6;yzxl
} HUZI7rC[=)
^]K_k7`I
} zpJQ7hym
Zv-#v
SortUtil： q.*k J/L
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package org.rut.util.algorithm; [:Sl^ Z&6M
G22u+ua
import org.rut.util.algorithm.support.BubbleSort; 'vBuQinn
import org.rut.util.algorithm.support.HeapSort; o^mW`g8[
import org.rut.util.algorithm.support.ImprovedMergeSort; #>}cuC@
import org.rut.util.algorithm.support.ImprovedQuickSort; t~3!| @3i
import org.rut.util.algorithm.support.InsertSort; `$05+UU
import org.rut.util.algorithm.support.MergeSort; H+` Zp
import org.rut.util.algorithm.support.QuickSort; jx J5F3d
import org.rut.util.algorithm.support.SelectionSort; {;q zz9 |
import org.rut.util.algorithm.support.ShellSort; "d%o%
w~Aw?75t
/** v#TU7v?~
* @author treeroot 51xiX90D
* @since 2006-2-2 |Y4c+6@_
* @version 1.0 ^DD]jx
*/ )m|)cLT&
public class SortUtil { f]Xh7m(Gh
public final static int INSERT = 1; UZz/v#y~
public final static int BUBBLE = 2; `fS$@{YI_
public final static int SELECTION = 3; ]@0C1r
public final static int SHELL = 4; Kqm2TMO]>V
public final static int QUICK = 5; y2KR^/LN|Y
public final static int IMPROVED_QUICK = 6; 7*.nd
public final static int MERGE = 7; h:xvnyaI
public final static int IMPROVED_MERGE = 8; <v%Q|r
public final static int HEAP = 9; 0-6rIdDTM
:pq+SifP
public static void sort(int[] data) { Qu|H_<8g
sort(data, IMPROVED_QUICK); ;0FfP
} ,N93H3(
private static String[] name={ )\Am:?RH;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B 1jeIk,
}; -%,=%FBi~4
yw\Q>~$n[=
private static Sort[] impl=new Sort[]{ {OIB/
new InsertSort(), =bgWUu\F
new BubbleSort(), .~u[rc|<
new SelectionSort(), #Pt_<?JtV
new ShellSort(), qz95)
new QuickSort(), 0~4Ww=#
new ImprovedQuickSort(), E6XDn`:
new MergeSort(), k'QI`@l&l
new ImprovedMergeSort(), @q]4]U)
new HeapSort() 6+!$x?5|NP
}; -!q^/ux
TXdo,DPv7
public static String toString(int algorithm){ {.eo?dQ
return name[algorithm-1]; *O_>3Hgl
} w{mw?0
xu\s2x$
public static void sort(int[] data, int algorithm) { w$iQ,--
impl[algorithm-1].sort(data); R#HVrzOO|T
} ^p)#;$6b
OYSq)!:
public static interface Sort { 'hR0JXy
public void sort(int[] data); GHY+q{'#V_
} ZmI0|r}QbY
K @RGvP
public static void swap(int[] data, int i, int j) { DQ<4`wEM
int temp = data; nr&bpA/
data = data[j]; ijP`fM8
data[j] = temp; .exBU1Yk@
} uP G\1
} >$,P )cB'