[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; :qzg?\(
} Xoj"rR9|
int i1=l; RY-iFydPc
int i2=mid+1; N`8K1{>BH
for(int cur=l;cur<=r;cur++){ QPlU+5Cx
if(i1==mid+1) 6= ?0&Bx&
data[cur]=temp[i2++]; \:vF FK4a
else if(i2>r) )%(ZFn}
data[cur]=temp[i1++]; E_,/)U8
else if(temp[i1] data[cur]=temp[i1++]; 'E|%l!xO
else vq$6e*A
data[cur]=temp[i2++]; QoD_`d
} P\U<,f
} s*uA3}j
[|nK5(e9
} v+ $3
bWFa{W5!
改进后的归并排序: =EJ&=t
8}QM~&&.
package org.rut.util.algorithm.support; _>gz&
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import org.rut.util.algorithm.SortUtil; Jqoo&T")
8Km&3nCv$Q
/** 4n,&,R r#
* @author treeroot L8 P0bNi
* @since 2006-2-2 osp~)icun
* @version 1.0 7[ ovEE54
*/ wE .H:q4&
public class ImprovedMergeSort implements SortUtil.Sort { w{ja*F6
O&Y;/$w
private static final int THRESHOLD = 10; XYcZ;Z9:
De$~ *2
/* '6N)sqTR
* (non-Javadoc) ;,{_=n>
* i/>k_mG$d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tP'v;$)9F
*/ v93b8/1
public void sort(int[] data) { a%#UF@I
int[] temp=new int[data.length]; fUw:jExz
mergeSort(data,temp,0,data.length-1); M9"Bx/
} Q 3WD!Z8y
I;4quFBlMu
private void mergeSort(int[] data, int[] temp, int l, int r) { .6y+van
int i, j, k; u]ms~rO
int mid = (l + r) / 2; Ym'h vK
if (l == r) teok*'b:
return; 1]xmOx[mb
if ((mid - l) >= THRESHOLD) b(K"CL\p
mergeSort(data, temp, l, mid); 5/.W-Q\pl}
else f3UCELJ
insertSort(data, l, mid - l + 1); Vgm*5a6t
if ((r - mid) > THRESHOLD) -%fQr5
mergeSort(data, temp, mid + 1, r); & SXw=;B
else =2!p>>t,d;
insertSort(data, mid + 1, r - mid); MlV(XG>'
6uE20O<z]
for (i = l; i <= mid; i++) { =~:IiK/#
temp = data; .}__XWK5
} QE]'Dc%
for (j = 1; j <= r - mid; j++) { s&73g0$$
temp[r - j + 1] = data[j + mid]; q1ysT.{p,
} +n1!xv]
int a = temp[l]; (]@S<0
int b = temp[r]; S,5ok0R
for (i = l, j = r, k = l; k <= r; k++) { {!Qu(%
if (a < b) { YZ~MByu
data[k] = temp[i++]; .fWy\r0
a = temp; H-_gd.VD
} else { "7cty\
data[k] = temp[j--]; ~[CFs'`(2
b = temp[j]; H(y`[B,}*
} $>)0t@[f
} (Yewd/T
} n>ryS/1
v,")XPY
/** vr;`h/
* @param data 7I3_$uF
* @param l |))NjM'ZBl
* @param i *'((_NZ>
*/ GxdAOiq;
private void insertSort(int[] data, int start, int len) { r;Sk[Y5#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0? {ADQz
} 3)G~ud
} 53t_#Yte
} _LJF:E5L
} 2cCiHEL#
-6[DQB
堆排序： um,f!ho-U
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package org.rut.util.algorithm.support; =WTSaC
@&\Y:aRO%i
import org.rut.util.algorithm.SortUtil; y_m+&Oe
_a$qsY
/** 8'PZA,CW
* @author treeroot =|oi0
* @since 2006-2-2 -[=~!Qr:
* @version 1.0 33oW3vS
*/ kqBZsfF
public class HeapSort implements SortUtil.Sort{ x9YQd69
TIGtX]`
/* (non-Javadoc) R'Jrbe|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SwOW%o
*/ +d3|Up8=
public void sort(int[] data) { 8?Zhh.
MaxHeap h=new MaxHeap(); ,@ '^3u
h.init(data); &jJu=6 U B
for(int i=0;i h.remove(); Yg&(kmm
System.arraycopy(h.queue,1,data,0,data.length); /p !A:8
} Qu|CXUk
#8Bh5L!SJ1
private static class MaxHeap{ 2>o[
ed6@o4D/kf
void init(int[] data){ `*s:[k5k
this.queue=new int[data.length+1]; 3RaduN]
for(int i=0;i queue[++size]=data; @:>]jp}uq
fixUp(size); s+:|b~
} rqjq}L)
} t]HY@@0g
=v:?rY}
private int size=0; iVFOOsJ@
bv4umL /
private int[] queue; Da-Lf2qT9
AYn65Ly
public int get() { DP{nvsF
return queue[1]; |^Iox0A
} NzT &K7v
2 5 \S>
public void remove() { x_Ev2 c'4
SortUtil.swap(queue,1,size--); \OW:-
fixDown(1); ?oYO !
} d6MWgg
file://fixdown Qj^Uz+b
private void fixDown(int k) { RRja{*R
int j; c!\Gj|
while ((j = k << 1) <= size) { l|.}>SfL^u
if (j < size %26amp;%26amp; queue[j] j++; h%EeU 3
if (queue[k]>queue[j]) file://不用交换 ^5X?WA,Z99
break; 6 - 3?&+
SortUtil.swap(queue,j,k); iM!2m$'s
k = j; )Q=u[ p
} nI3p`N8j*
} mz0{eO
private void fixUp(int k) { BHr,jC
while (k > 1) { *q6XK_
int j = k >> 1; s*PKr6X+
if (queue[j]>queue[k]) M86"J:\u]
break; Ll|-CY $
SortUtil.swap(queue,j,k); 7Yg1z%%U
k = j; > 'R{,1# U
} DXf
} |[rn/
wh(_<VZ
} FxlH;'+Q
JRB6T_U
} {dF@Vg_n
1WtE] D
SortUtil： ^Q#_
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package org.rut.util.algorithm; c+ZOC8R
N[cIr{XBGN
import org.rut.util.algorithm.support.BubbleSort; >*EZZ\eU!
import org.rut.util.algorithm.support.HeapSort; N}5
import org.rut.util.algorithm.support.ImprovedMergeSort; 8-<F4^i_i
import org.rut.util.algorithm.support.ImprovedQuickSort; '#c#.O
import org.rut.util.algorithm.support.InsertSort; }F]Z1('
import org.rut.util.algorithm.support.MergeSort; E7O3$B8
import org.rut.util.algorithm.support.QuickSort; 2B4.o*Q\
import org.rut.util.algorithm.support.SelectionSort; J!om"h
import org.rut.util.algorithm.support.ShellSort; {]6-,/3UR
$ 5"
/** [0Xuo
* @author treeroot W/UA%We3+L
* @since 2006-2-2 uBts?02
* @version 1.0 ;?{^LiD+F
*/ ?pIELezfK
public class SortUtil { H@-q NjM
public final static int INSERT = 1; 8Ay7I
public final static int BUBBLE = 2; |-ZML~2S=h
public final static int SELECTION = 3; Ct'tUF<K5
public final static int SHELL = 4; #;8)UNc)}
public final static int QUICK = 5; lZAGoR;0Ra
public final static int IMPROVED_QUICK = 6; (EcP'F*;;y
public final static int MERGE = 7; Tbm ~@k(C
public final static int IMPROVED_MERGE = 8; f2c<-}wR
public final static int HEAP = 9; Y-})/zFc
8`L]<Dm
public static void sort(int[] data) { o1#3A
sort(data, IMPROVED_QUICK); 2D%2k
} oU)(/
private static String[] name={ 6Mk#) ebM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fK:4jl-r
}; HKbV@NW
9iT9ZfaW
private static Sort[] impl=new Sort[]{ 2K_ QZ
new InsertSort(), %( OP [
new BubbleSort(), FV9{u[3m
new SelectionSort(), Mo@{1K/9
new ShellSort(), 7[=G;2<
new QuickSort(), D,=~7/g
new ImprovedQuickSort(), Zsapu1HoL\
new MergeSort(), %qcCv9
new ImprovedMergeSort(), -Y+pLvG*
new HeapSort() 5 v.&|[\k
}; r3x;lICx-
+E9G"Z65iP
public static String toString(int algorithm){ ~H#c-B
return name[algorithm-1]; 0(d!w*RpG
} V(kK2az
>3g`6d
public static void sort(int[] data, int algorithm) { "3jTU
impl[algorithm-1].sort(data); bCP2_h3*
} @ *Jbp
:kcqf,7
public static interface Sort { [BdRx`
public void sort(int[] data); d>#',C#;
} #O_%!7M{4
b,:^\HKC
public static void swap(int[] data, int i, int j) { bX[ZVE(L
int temp = data; CV HKP[-
data = data[j]; An>ai N]
data[j] = temp; @G]*]rkKb
} EyR/
} ]UIN4E