[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; !a3cEzs3
} ]}F_nc2L
int i1=l; Tn/ 3`j {
int i2=mid+1; K3?7Hndf2
for(int cur=l;cur<=r;cur++){ ReP7c3D>p
if(i1==mid+1) Qg?^%O'
data[cur]=temp[i2++]; E'$r#k:o
else if(i2>r) #HB]qa
data[cur]=temp[i1++]; PBr-<J
else if(temp[i1] data[cur]=temp[i1++]; kAf:_0?6
else %Md;=,a:6
data[cur]=temp[i2++]; l{aXX[E&1
} ;,Sl+)@h
} f6^H Q1SSt
(I,PC*:
} j0o_``
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改进后的归并排序: R3&W.?C T
a`GoNh,
package org.rut.util.algorithm.support; zp"sM z]
kwK<?\D
import org.rut.util.algorithm.SortUtil; %|o4 U0c
*gu~7&yoP
/** L]kSj$A
* @author treeroot i+jSXn"_
* @since 2006-2-2 F[115/
* @version 1.0 ;hmy7M1%
*/ ?bQ~+M\
public class ImprovedMergeSort implements SortUtil.Sort { Az6f I*yP
_7]* 5Pxo
private static final int THRESHOLD = 10; j*g5f
WU{G_Fqaz
/* sBq @W4
* (non-Javadoc) qJVW :$1q
* <"AP&J'H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J^ryUOo}b
*/ ,S:LhgSP
public void sort(int[] data) { 0NZg[>H
int[] temp=new int[data.length]; hI;tB6
mergeSort(data,temp,0,data.length-1); {?l#*XH;
} `*8p T
hFZ7{pj
private void mergeSort(int[] data, int[] temp, int l, int r) { D+N{'d?+
int i, j, k; lEANNu
int mid = (l + r) / 2; 5X nA.?F^
if (l == r) {G/4#r 2>
return; ?H0 #{!s
if ((mid - l) >= THRESHOLD) &I:5<zK{
mergeSort(data, temp, l, mid); mE%H5&VSI
else m/JpYv~
insertSort(data, l, mid - l + 1); EP'2'51
if ((r - mid) > THRESHOLD) B:a&)Lwp0
mergeSort(data, temp, mid + 1, r); )O"5dF1l
else ^4O1:_|G
insertSort(data, mid + 1, r - mid); 4At%{E
Obrv5%'
for (i = l; i <= mid; i++) { Q~#udEajI
temp = data; 5pI2G
} K]oFV
for (j = 1; j <= r - mid; j++) { n4Ry)O[.
temp[r - j + 1] = data[j + mid]; gE0k|Z(RF
} dMQtW3stY
int a = temp[l]; ((N<2G)
int b = temp[r]; C\j|+s
for (i = l, j = r, k = l; k <= r; k++) { bf-.SX~
if (a < b) { &o= #P2Qd
data[k] = temp[i++]; 5<GC
a = temp; =" #O1$
} else { V"#ie Yn
data[k] = temp[j--]; tVvRT*>Wb
b = temp[j]; g599Lc&
} vkOCyi?c
} x}i:nLhL
} H@qA X
b/Z=FS2T
/** t`o-HWfS.
* @param data ^9%G7J:vGO
* @param l tz)aQ6p\X
* @param i .v9#|d d+
*/ >93vMk~hU
private void insertSort(int[] data, int start, int len) { xJa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0g,;Yzm
} cclx$)X1X
} d0"Hu^]
} A/|To!R
} c]v$C&FX
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堆排序： (Gp/^[.%&
TIbiw
package org.rut.util.algorithm.support; D/'kYoAEO
#;)Oi9{9;
import org.rut.util.algorithm.SortUtil; (y[+s?;WyB
4`yCvPu
/** 7](,/MeGG
* @author treeroot B+#!%J_
* @since 2006-2-2 WolkW:(Cg
* @version 1.0 :Gsh
*/ [KLs} ~H
public class HeapSort implements SortUtil.Sort{ `|Pfa
5f(yF
/* (non-Javadoc) n#Q;bSw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O; 7`*}m
*/ 3s<~}&"
public void sort(int[] data) { "-88bF~
MaxHeap h=new MaxHeap(); ?'Y\5n/*$
h.init(data); Ly"u }e
for(int i=0;i h.remove(); eY)ugq>'
System.arraycopy(h.queue,1,data,0,data.length); pwtB{6)VH{
} !}<d6&!py
S}f3b N
private static class MaxHeap{ T!0o(Pp<
rkugV&BhV
void init(int[] data){ 9E5Ec~l
this.queue=new int[data.length+1]; 3gV 17a
for(int i=0;i queue[++size]=data; XZD9vFj1Z
fixUp(size); b R> G%*a
} "SJp9s3
} [KR|m,QWp
? C1.g'}7
private int size=0; 8/F}vfKEN
+!h~T5Ck
private int[] queue; {+%|nOWV
l2vIKc
public int get() { dmI~$*
return queue[1]; +:k Iq
} b;G3&R]
HX%lL}E
public void remove() { cH%qoHgx
SortUtil.swap(queue,1,size--); rp^=vfW
fixDown(1); ~~>`WA\G5,
} : 8dQ8p;
file://fixdown :>4pH
private void fixDown(int k) { ]CHO5'%,$
int j; 1BK!<}yI{
while ((j = k << 1) <= size) { h+=xG|1R[5
if (j < size %26amp;%26amp; queue[j] j++; v EppkS U1
if (queue[k]>queue[j]) file://不用交换 -< D7
break; yw2Mr+9I
SortUtil.swap(queue,j,k); `G7LM55
k = j; ]^j:}#R
} wX5Yo{
} fy]z<SPhVJ
private void fixUp(int k) { hEUS&`K
while (k > 1) { Z>hS&B
int j = k >> 1; :/UO3 c(
if (queue[j]>queue[k]) ko<u0SjF)u
break; }MQNzaXY^
SortUtil.swap(queue,j,k); ere h!
k = j; &\tD$g~"
} 7[z^0?Pygf
} g~EN3~
7X 4/6]*
} s8BfOl-
&CBW>*B
} DwSB(O#X
DEJ0<pnQr
SortUtil： p[oR4 HWr
<L'!EcHm%]
package org.rut.util.algorithm; 4SRjF$Bsz
5&A{IN
import org.rut.util.algorithm.support.BubbleSort; _G3L+St
import org.rut.util.algorithm.support.HeapSort; dpAj9CX(
import org.rut.util.algorithm.support.ImprovedMergeSort; Qp>'V<%m-
import org.rut.util.algorithm.support.ImprovedQuickSort; 1i=lJmr
import org.rut.util.algorithm.support.InsertSort; Ao?y2 [sE
import org.rut.util.algorithm.support.MergeSort; QFekj@
import org.rut.util.algorithm.support.QuickSort; QIl=Ho"c
import org.rut.util.algorithm.support.SelectionSort; ]hE%Tk-
import org.rut.util.algorithm.support.ShellSort; P:D@5
1. A@5*Q
/** ~dc o
* @author treeroot X%(1C,C(
* @since 2006-2-2 '`s\_Q)hG_
* @version 1.0 ul(pp+%S
*/ 7`xeuK
public class SortUtil { Z4ekBdmCL
public final static int INSERT = 1; (F=/r]Q
public final static int BUBBLE = 2; m[aBHA^g
public final static int SELECTION = 3; iA.:{^_)09
public final static int SHELL = 4; YQ? "~[mL
public final static int QUICK = 5; ycD.X"
public final static int IMPROVED_QUICK = 6; 9 +1}8"~
public final static int MERGE = 7; #*;G8yV
public final static int IMPROVED_MERGE = 8; EBQ,Ypv
public final static int HEAP = 9; s!73To}>
:O?+Ywn
public static void sort(int[] data) { UP<B>Y1a
sort(data, IMPROVED_QUICK); \7V[G6'{
} Sb QM!Q
private static String[] name={ !LI 8Xk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DP@F-Q4
}; jJ.isr|`
ATRB9
private static Sort[] impl=new Sort[]{ wWYo\WH'
new InsertSort(), gh9Gc1tKt
new BubbleSort(), ]v2%hX
new SelectionSort(), cG)U01/"
new ShellSort(), C>NLZMT
new QuickSort(), d\O*Ol*/v
new ImprovedQuickSort(), s2=`haYu
new MergeSort(), {!0f.nv
new ImprovedMergeSort(), wXR7Ifrv
new HeapSort() "udA-;!@&
}; t,w'w_C
'@6O3z_{
public static String toString(int algorithm){ S =5br
return name[algorithm-1]; 3g79/w
} m=[3"X3W1V
"J(T?|t
public static void sort(int[] data, int algorithm) { hQb3 8W[
impl[algorithm-1].sort(data); !kW~s_gUb*
} ;$.^
,DL%oQR
public static interface Sort { *lo0T93B
public void sort(int[] data); #i;y[dQ
} MSqW {
fphi['X
public static void swap(int[] data, int i, int j) { /OD@Xl];K
int temp = data; MV.&GUez{
data = data[j]; SD_P=?
data[j] = temp; h"}c_lY9
} u> @@
} %/n#{;c#