[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; miKi$jC}vq
} AWi87q
int i1=l; R',w~1RV'
int i2=mid+1; zbR.Lb
for(int cur=l;cur<=r;cur++){ d3$<|mG$
if(i1==mid+1) Lr^xp,_n
data[cur]=temp[i2++]; g IKm
else if(i2>r) w?*KO?K
data[cur]=temp[i1++]; PYUY bRn
else if(temp[i1] data[cur]=temp[i1++]; DG-vTr
else GKSy|z
data[cur]=temp[i2++]; qh'BrYu*
} JA}'d7yEa
} ? 1{S_
jysV%q 3
} Dmi;# WY
;Y'\:
改进后的归并排序: </Id';|v
n96gDH*
package org.rut.util.algorithm.support; Fs|;>Up0
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import org.rut.util.algorithm.SortUtil; {|gJC>f@
9H}&Ri%
/** Z)A+ wM
* @author treeroot d{hYT\7~1(
* @since 2006-2-2 G"[pr%?
* @version 1.0 6'ZnyWb
*/ J9FNjM[qe
public class ImprovedMergeSort implements SortUtil.Sort { _pGviGR
."X~?Nk
private static final int THRESHOLD = 10; Yel(}Ny
hn|E<
/* eh>E).
* (non-Javadoc) UT~2}B9fc
* E,fp=.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nc~d*K\!
*/ @,&m`qzd+
public void sort(int[] data) { @>@Nug2
int[] temp=new int[data.length]; QL2y,?Mz7
mergeSort(data,temp,0,data.length-1); 3R*@m
} X-,y[ )
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private void mergeSort(int[] data, int[] temp, int l, int r) { \,!q[nC
int i, j, k; fti|3c
int mid = (l + r) / 2; I 6YT|R
if (l == r) Bqi2n'^O2
return; *`-29eR"8
if ((mid - l) >= THRESHOLD) zjS:;!8em
mergeSort(data, temp, l, mid); F\R}no5C
else cOZ^huK
insertSort(data, l, mid - l + 1); }hitU(5t0
if ((r - mid) > THRESHOLD) :"^< aLj
mergeSort(data, temp, mid + 1, r); PL$F;d
else .K1E1Z_
insertSort(data, mid + 1, r - mid); BDRVT Y(s
k#5e:VOb
for (i = l; i <= mid; i++) { a.IF%hP0xo
temp = data; Y^Q|l%Qrb
} ?1:/ 6
for (j = 1; j <= r - mid; j++) { SQU%N
temp[r - j + 1] = data[j + mid]; ]~Vu-@ /}
} #ljg2:I+
int a = temp[l]; 9:i,WJO
int b = temp[r]; (y=o]Vy
for (i = l, j = r, k = l; k <= r; k++) { FTnQqDuT
if (a < b) { [0ffOTy
data[k] = temp[i++]; Ju7C?)x
a = temp; idS RWa
} else { QeJ.o.m{
data[k] = temp[j--]; _1> 4Q%
b = temp[j]; }!]x|zU.=
} Yb3f]4EH
} p}DF$k%`
} xO-U]%oq
+7<>x-+
/** ]MLLr'6?
* @param data NND=Zxl
* @param l !K3cf]2UD
* @param i (E}cA&{
*/ *.]E+MYi*
private void insertSort(int[] data, int start, int len) { :2)1vQH0L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6a?$=y
} `ab\i`g9
} Y0yO`W4
} 5%+bWI{w
} pb6^sA%l
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堆排序： kqvJ&7
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package org.rut.util.algorithm.support; 8H#c4%by)
j$8|ym^OX
import org.rut.util.algorithm.SortUtil; hAr[atu87
!8@rK$DB
/** <S8W~wC
* @author treeroot o+_/)c
* @since 2006-2-2 Ipz 1+ #s'
* @version 1.0 Eh@T W%9*
*/ k\c &2T]W
public class HeapSort implements SortUtil.Sort{ +#uNQ`1v
)*K<;WIWH
/* (non-Javadoc) *Iwk47J ;a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RD$tc~@UB
*/ >@^yj+k
public void sort(int[] data) { "-QRkif
MaxHeap h=new MaxHeap(); uz#PBV8Q
h.init(data); hHc^ZA
for(int i=0;i h.remove(); RQpIBsj
System.arraycopy(h.queue,1,data,0,data.length); 2WPF{y%/
} i$JG^6,O
a][pTC\rb
private static class MaxHeap{ W-!Bl&jF[
;*-@OLT_K
void init(int[] data){ 45)ogg2
this.queue=new int[data.length+1]; Ku/H=
for(int i=0;i queue[++size]=data; : \:~y9X0
fixUp(size); Wz-3?EQ
} s"=F^#
} B221}t
|)?aH2IL
private int size=0; KZ!N{.Jk
1t[;`iZ
private int[] queue; fATA%eA8;
H6ky)kF&
public int get() { HZDaV&)@
return queue[1]; YQ@dl
} \)otu\3/
uRm_
public void remove() { >'ksXA4b
SortUtil.swap(queue,1,size--); Wj4^W<IO
fixDown(1); !2Xr~u7a
} ;<kZfx
file://fixdown A3MZxu=':3
private void fixDown(int k) { NF/Ti5y
int j; rwL=R,
while ((j = k << 1) <= size) { %jZp9}h
if (j < size %26amp;%26amp; queue[j] j++; vLBee>$
if (queue[k]>queue[j]) file://不用交换 <84C tv
break; 5y%un
SortUtil.swap(queue,j,k); {b|3]_-/
k = j; yE.495
} )l#%.Z9
} :Hzz{'
private void fixUp(int k) { (:?5 i`
while (k > 1) { t+3
int j = k >> 1; nIyROhZ
if (queue[j]>queue[k]) lrs0^@.+
break; ;]gsJ9FK<
SortUtil.swap(queue,j,k); :F^$"~(,
k = j; ~KAp\!,
} Y]~ HAv '
} ]27>a"p59Y
@],6SKbG6
} :BL'>V
I|KY+k> /
} 8h&oSOkQk,
hv$uH7Fz
SortUtil： fiE>H~
G2CZwm{/f
package org.rut.util.algorithm; ka5#<J7<p
}uF[Ra
import org.rut.util.algorithm.support.BubbleSort; ?W[J[cb
import org.rut.util.algorithm.support.HeapSort; Qp kKVLi
import org.rut.util.algorithm.support.ImprovedMergeSort; y+4?U
import org.rut.util.algorithm.support.ImprovedQuickSort; }BI~am_
import org.rut.util.algorithm.support.InsertSort; ,DQGv_
import org.rut.util.algorithm.support.MergeSort; L$Hx?^3
import org.rut.util.algorithm.support.QuickSort; z(g%ue\
import org.rut.util.algorithm.support.SelectionSort; ?G$Om
import org.rut.util.algorithm.support.ShellSort; SY%A"bC
cBz!U8(
/** ZnvEv;P
* @author treeroot V!T^wh;
* @since 2006-2-2 '}jf#C1$c
* @version 1.0 BIxV|\k
*/ h8f!<:rTS
public class SortUtil { '1W!xQ}E
public final static int INSERT = 1; IajD;V
public final static int BUBBLE = 2; (KT38RhA
public final static int SELECTION = 3; 1MbY7!?PG
public final static int SHELL = 4; <i\UMrD]`:
public final static int QUICK = 5; ?^%YRB&
public final static int IMPROVED_QUICK = 6; k$e D(cW$
public final static int MERGE = 7; ?,ZELpg n
public final static int IMPROVED_MERGE = 8; V";mWws+?#
public final static int HEAP = 9; dT5J-70Fl
{ 1+Cw?1d
public static void sort(int[] data) { z.eJEK
sort(data, IMPROVED_QUICK); ]b4pI*:$I
} Ik`O.Q.}
private static String[] name={ F(Lb8\to\M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5;IT64&]
}; _PK}rr?"7O
$Y8>_6%+T
private static Sort[] impl=new Sort[]{ /xl4ohL$a
new InsertSort(), .)LZ`Ge3F
new BubbleSort(), 9{_8cpm4
new SelectionSort(), b;S6'7Jf9
new ShellSort(), N]B)Fb
new QuickSort(), VZ\O9lD
new ImprovedQuickSort(), ^oS$>6|
new MergeSort(), uQH%.A
new ImprovedMergeSort(), }x*7l`1
new HeapSort() Ct4LkmD
}; WMW1B}Z3
J'oDOn.M
public static String toString(int algorithm){ 8';m)Jc
return name[algorithm-1]; fv|]= e
} QB!jLlg(
CPVzX%=
public static void sort(int[] data, int algorithm) { ZU=,f'bU
impl[algorithm-1].sort(data); r eGm>
} ^'m\D;
*6:v}#b[
public static interface Sort { ^#]c0
public void sort(int[] data); ?nQ_w0j
} _b>F#nD,'%
):e+dt
public static void swap(int[] data, int i, int j) { J!rY 6[t
int temp = data; ?#d6i$
data = data[j]; \I?w)CE@R
data[j] = temp; 9lKn%|=T
} >xT^RYS
} }$l8d/_$[