[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; wxxC&!
} d\M !o*U
int i1=l; jK53-tF~I
int i2=mid+1; ,~#hHhR_
for(int cur=l;cur<=r;cur++){ J)o%83//
if(i1==mid+1) sP%.o7&n
data[cur]=temp[i2++]; >rubMGb
else if(i2>r) +l(}5(wc
data[cur]=temp[i1++]; ><~hOK?v
else if(temp[i1] data[cur]=temp[i1++]; I5]zOKlVR
else yk/XfwQ5
data[cur]=temp[i2++]; \\JXY*DA:+
} T~>:8i
} ?a@l.ZM*
*VB*/^6A
} ix;8S=eP~{
\ :.p8`
改进后的归并排序: D5x^O2
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package org.rut.util.algorithm.support; zAewE@N#_
p20Nk$.
import org.rut.util.algorithm.SortUtil; )SuJK.IF
3]acfCacC
/** 5]E5V@C
* @author treeroot ?$Pj[O^hl
* @since 2006-2-2 ~m7+^c@,
* @version 1.0 |a+8-@-Tj
*/ 26A#X
public class ImprovedMergeSort implements SortUtil.Sort { 65v'/m!ys
~WSC6Bh@9
private static final int THRESHOLD = 10; |wx1 [xZ
al/~
/* c@`P{6
* (non-Javadoc) -/X-.#}-
* 2ip~qZNw><
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9}N*(PI
*/ S%2qB;uw
public void sort(int[] data) { UpILr\3U
int[] temp=new int[data.length]; m\yO/9{h1
mergeSort(data,temp,0,data.length-1); J7ln6Y
} 7+"X^$
q2y:bqLWl
private void mergeSort(int[] data, int[] temp, int l, int r) { @p;4g_F
int i, j, k; Dts:$PlCk
int mid = (l + r) / 2; uw]Jm"=w
if (l == r) ryN-d%t?
return; b~}}{fm&f
if ((mid - l) >= THRESHOLD) s6I]H
mergeSort(data, temp, l, mid); <OUAppH
else c1i7Rc{q
insertSort(data, l, mid - l + 1); (c"!0v
if ((r - mid) > THRESHOLD) IF=rD-x
mergeSort(data, temp, mid + 1, r); N@g+51ye
else '5%DKz
insertSort(data, mid + 1, r - mid); `Oi@7/oT
7_RU*U^
for (i = l; i <= mid; i++) { #p]On87>
temp = data; (_* a4xGF
} s=:n<`Z2
for (j = 1; j <= r - mid; j++) { F&0rI8Nr
temp[r - j + 1] = data[j + mid]; aozk,{9-
} o9/P/PZ\X
int a = temp[l]; e042`&9=Ic
int b = temp[r]; Rd2[xk
for (i = l, j = r, k = l; k <= r; k++) { (<12&=WxE
if (a < b) { deNU[
data[k] = temp[i++]; 4{|lzo'&
a = temp; J [1GP_
} else { x;+,lP
data[k] = temp[j--]; (H$eXW7
b = temp[j]; wgrYZ^]
} 2.6,c$2tB
} Hl#o& *Ui"
} 3]'3{@{}H
#xmUND`@
/** *jYwcW"R{z
* @param data -&c@c@dC
* @param l {PU[MHZF
* @param i ]n{2cPx5d
*/ <^=k~7m
private void insertSort(int[] data, int start, int len) { PSRGlxdO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JOMZ&c^
} Y, P-@(
} <C&UDj
} nJ,56}
} Ac|`5'/Tx
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堆排序： ' |4XyU=
H Q2-20
package org.rut.util.algorithm.support; VAq:q8(K
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import org.rut.util.algorithm.SortUtil; r )T`?y
;,viE~n
/** :A[ Gtc(_
* @author treeroot (nBsf1l
* @since 2006-2-2 zmdOL9"a
* @version 1.0 .8"o&%$`V
*/ As"'KR
public class HeapSort implements SortUtil.Sort{ +/ #J]v-
cJt#8P
/* (non-Javadoc) rTi.k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lB-Njr
*/ })J]D~!p
public void sort(int[] data) { wtZe\h
MaxHeap h=new MaxHeap(); F*a+&% Q
h.init(data); t<e?f{Q5
for(int i=0;i h.remove(); s#4 "f
System.arraycopy(h.queue,1,data,0,data.length); l!oU9
} u", [ulP
KmMt:^9
private static class MaxHeap{ 8J)x>6
O".#B
void init(int[] data){ ZI8p(e
this.queue=new int[data.length+1]; ~sM334sQ
for(int i=0;i queue[++size]=data; zNBG;\W
fixUp(size); giI9-C
} &=f%(,+
} 2+|[e_
6ds&n#n
private int size=0; V482V#BP
jildiT[s
private int[] queue; [9w8oNg0
l!`m}$
public int get() { c0tv!PSw
return queue[1]; uz%rWN`{
} &)rmv
3iY`kf
public void remove() { c^m}ep\F5L
SortUtil.swap(queue,1,size--); /ZAEvdO*P
fixDown(1); " I:j a7
} '06[@Cw
file://fixdown ,\Cy'TSz
private void fixDown(int k) { C<{k[!N%zm
int j; &ed.%:
while ((j = k << 1) <= size) { P*\.dAi
if (j < size %26amp;%26amp; queue[j] j++; }APf^Ry
if (queue[k]>queue[j]) file://不用交换 f9;M"Pd
break; $[IuEdc/
SortUtil.swap(queue,j,k); _v_ak4m>
k = j; +|^rz#X
} P}cGWfj
} d~qDQ6!
private void fixUp(int k) { [~$9n_O94
while (k > 1) { 42Z2Mjtk
int j = k >> 1; J.~$^-&!
if (queue[j]>queue[k]) N8:vn0ww
break; Cfa?LgSz
SortUtil.swap(queue,j,k); U#YM)8;Iz
k = j; ni9/7
} U*)pUJ{&t
} N'TL &]
^ng?+X>mP
} Zsaz#z|xW
VNF@)!l
} uZi]$/ic
75gE>:f
SortUtil： Dk/;`sXV
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package org.rut.util.algorithm; BsRxD9r
I:[3x2H
import org.rut.util.algorithm.support.BubbleSort; {G_ZEo#x8,
import org.rut.util.algorithm.support.HeapSort; ) _"`{2
import org.rut.util.algorithm.support.ImprovedMergeSort; \ VJ3
import org.rut.util.algorithm.support.ImprovedQuickSort; )~rN{W<s`H
import org.rut.util.algorithm.support.InsertSort; GBN^ *I
import org.rut.util.algorithm.support.MergeSort; ~fEgrF d
import org.rut.util.algorithm.support.QuickSort; c}lUP(Ss
import org.rut.util.algorithm.support.SelectionSort; TN(1oJ:
import org.rut.util.algorithm.support.ShellSort; m\[r6t]V
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/** S$ dFz
* @author treeroot Q!MS_ #O
* @since 2006-2-2 YS%HZFY, "
* @version 1.0 _r&`[@m
*/ m%l\EE
public class SortUtil { ,{7Z OzA
public final static int INSERT = 1; 8h}o5B
public final static int BUBBLE = 2; 7@5}WNr
public final static int SELECTION = 3; 9tWu>keu
public final static int SHELL = 4; GVe[)R
public final static int QUICK = 5; BG/M3
public final static int IMPROVED_QUICK = 6; j$siCsF
public final static int MERGE = 7; eNpGa0 eG
public final static int IMPROVED_MERGE = 8; Y0 Ta&TYZ0
public final static int HEAP = 9; *e!0ZB3J
b v~"_)C
public static void sort(int[] data) { P;{f+I|`
sort(data, IMPROVED_QUICK); )mS Aog<
} gm\P`~+o
private static String[] name={ >`SIB; &>j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "I}3*s9Q-
}; {+!m]-s
Z-.`JkKd8
private static Sort[] impl=new Sort[]{ m onqaSF
new InsertSort(), 0DV .1
new BubbleSort(), 5_9mA4gs@
new SelectionSort(), ^,qi`Tk
new ShellSort(), =Z2Cg{z
new QuickSort(), ZXh6Se4o
new ImprovedQuickSort(), FY@ErA7~
new MergeSort(), UW_fn
new ImprovedMergeSort(), =E,^ +`M
new HeapSort() *xI0hFJIM
}; GMyzQ]@}
n3-5`Jti
public static String toString(int algorithm){ p<: bPw
return name[algorithm-1]; QJ\ o"c
} mbK$_HvU
k|'{$/n
public static void sort(int[] data, int algorithm) { \ym3YwP4/:
impl[algorithm-1].sort(data); &;DK^ta*P
} $i;%n1VBg
1 \:5ow&a
public static interface Sort { R<I)}<g(A3
public void sort(int[] data); bk44qL;8
} JmjqA Dex
:q/%uca9
public static void swap(int[] data, int i, int j) { K!;Z#$iw[
int temp = data; UOC>H%r~M?
data = data[j]; [W;iR_7T5
data[j] = temp; tN&4t xB
} pX `BDYg.
} q'fZA;