[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; <h<4R Rj
} ^Z~'>J
int i1=l; ~G#^kNme
int i2=mid+1; ?~fuMy B
for(int cur=l;cur<=r;cur++){ J2P5<
if(i1==mid+1) DX)T}V&mP
data[cur]=temp[i2++]; (%^Bp\.02!
else if(i2>r) 5p5S_%R$e
data[cur]=temp[i1++]; Fm,}sP"Qx
else if(temp[i1] data[cur]=temp[i1++]; wD'LX
else I~: AWS9
data[cur]=temp[i2++]; ^7O,Vk"Z
} Y/aNrIK7
} IsjD-t
l: X]$2;
} n^m6m%J)
q,H 0=\
改进后的归并排序: -+#g.1UL/
tzFgPeo$;
package org.rut.util.algorithm.support; |Y42ZOK0
v4V|j<R
import org.rut.util.algorithm.SortUtil; #Kp/AN5YC
0o+2]`q)Q
/** DTw3$:
* @author treeroot {V)Z!D
* @since 2006-2-2 ?MhY;z`=
* @version 1.0 #[a+m
*/ *0aU(E#
public class ImprovedMergeSort implements SortUtil.Sort { "77 j(Vs9
<Hq|<^_K
private static final int THRESHOLD = 10; 8>sToNRNe
u\-f\Z7
/* YLfZ;W|6u
* (non-Javadoc) z7H[\4A!>
* #sq$i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Eo;CaaF/
*/ ?r,lgaw
public void sort(int[] data) { )D:I@`*
int[] temp=new int[data.length]; fi2@`37PM
mergeSort(data,temp,0,data.length-1); ci@U a}T
} 4oF8F)ASj
ZMHb
private void mergeSort(int[] data, int[] temp, int l, int r) { Jz!8Xg%a
int i, j, k; &a>fZ^Y=k
int mid = (l + r) / 2; <[H1S@{W
if (l == r) ^]$x/1I;
return; 76\ir<1up
if ((mid - l) >= THRESHOLD) }wh)I]]U
mergeSort(data, temp, l, mid); }/yhwijg
else %s;#epP$
insertSort(data, l, mid - l + 1); pN)9GO5
if ((r - mid) > THRESHOLD) i'5Q.uX
mergeSort(data, temp, mid + 1, r); t&SC>8M<
else Xz'pZ*Hr$v
insertSort(data, mid + 1, r - mid); >5&'_
=8r%zLDw
for (i = l; i <= mid; i++) { h7NS9CgO
temp = data; -;TqdL@
} ThX%Uzd"[;
for (j = 1; j <= r - mid; j++) { M ]dS>W%U
temp[r - j + 1] = data[j + mid]; coHzbD~#H
} 8I)66
int a = temp[l]; 6uCa iPV
int b = temp[r]; %X Jv;|
for (i = l, j = r, k = l; k <= r; k++) { !F*7Mif_E
if (a < b) { [2UjY^\;T
data[k] = temp[i++]; ]A:n]mL
a = temp; -aDGXQM{~
} else { )oJn@82C|
data[k] = temp[j--]; NKD<VMcqw
b = temp[j]; Gpws_jw
} 2r2qZ#I}
} P%A^TD|
} sr+* q6W
\WG6\Zg0A
/** EELS-qA
* @param data W3s>+yU
* @param l m$ZPQ0X
* @param i Y<0;;tVf4U
*/ !rzbm&@
private void insertSort(int[] data, int start, int len) { dd#=_xe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bb2;zOGdA
} 0Ym+10g
} }{Ab:+aNd
} T u>5H`
} 'M>QA"*48E
F!*u}8/_!
堆排序： QH:k5V~
j^#4!Ue
package org.rut.util.algorithm.support; "c8 -xG
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import org.rut.util.algorithm.SortUtil; W($}G_j[B1
o2
/** QOA7#H-m9
* @author treeroot r(;sX
* @since 2006-2-2 ]v&)mK]n=o
* @version 1.0 c5x2FM z
*/ yd#SB)&
public class HeapSort implements SortUtil.Sort{ P;_}nbB
5VD(fW[OW]
/* (non-Javadoc) jFbj)!;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G`H4#@]
*/ >yk@t&j,
public void sort(int[] data) { 4D+S\S0bk
MaxHeap h=new MaxHeap(); 0c6b_%Rd
h.init(data); RCM;k;@8V
for(int i=0;i h.remove(); a;a^- n|D
System.arraycopy(h.queue,1,data,0,data.length); i\~@2
} H_w&_h&
L'(ei7Z
private static class MaxHeap{ mX8k4$z
.V~z6
void init(int[] data){ @JB9qT
this.queue=new int[data.length+1]; yW3!V-iA
for(int i=0;i queue[++size]=data; ca )n*SD
fixUp(size); VcI'+IoR?
} dsJMhB_41U
} '" MT$MrT
}eKY%WU>O
private int size=0; K qK?w*Qw
t`F<lOKj
private int[] queue; ^w|D^F=o
iO$Z?Dyg9
public int get() { -/^a2_d[
return queue[1]; dWKjVf
} "~V|p3
''p7!V?
public void remove() { hYvWD.c}
SortUtil.swap(queue,1,size--); dZ6\2ok+
fixDown(1); h7?uM^p
} <GdQ""X
file://fixdown Al93x
private void fixDown(int k) { $3yzB9\a"
int j; 9nGS"E l{
while ((j = k << 1) <= size) { |$^a"Yd`9
if (j < size %26amp;%26amp; queue[j] j++; 3'*}ZDC
if (queue[k]>queue[j]) file://不用交换 +HAd=DU
break; +cXdF
SortUtil.swap(queue,j,k); wC&+nS1
k = j; ]K<mkUpY
} V;N'?Gu
} rl__3q
private void fixUp(int k) { A_pcv7=@
while (k > 1) { o],z/MPL
int j = k >> 1; |'+ [ '
if (queue[j]>queue[k]) bVgmjt2&>
break; qA;!Pql`
SortUtil.swap(queue,j,k); |V dr/'
k = j; KlbUs\E
} yt5'2!jc
} O!3`^_.
0}4FwcCr\
} 9zKbzT]
JI7.:k;
} @ak3ZNor
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SortUtil： |M$ESj4@
6Gj69Lr
package org.rut.util.algorithm; _ry7[/)
d@QC[$qXj
import org.rut.util.algorithm.support.BubbleSort; gZ 6Hj62D
import org.rut.util.algorithm.support.HeapSort; p6*|)}T_%
import org.rut.util.algorithm.support.ImprovedMergeSort; @FLa i
import org.rut.util.algorithm.support.ImprovedQuickSort; _[p@V_my
import org.rut.util.algorithm.support.InsertSort; sqjv3=}
import org.rut.util.algorithm.support.MergeSort; 2E/yZ ~2s
import org.rut.util.algorithm.support.QuickSort; Ks/Uyu. X
import org.rut.util.algorithm.support.SelectionSort; %:=Jr#a
import org.rut.util.algorithm.support.ShellSort; R2B0?fu
<pp<%~_Z
/** Z#_+yw
* @author treeroot mEVne.D
* @since 2006-2-2 15U[F0b
* @version 1.0 yq,%ey8
*/ ZNjqH[
public class SortUtil { I/Q5Y-atg
public final static int INSERT = 1; *p>1s!i
public final static int BUBBLE = 2; YA'_Ba(v)
public final static int SELECTION = 3; 6~y7A<[^
public final static int SHELL = 4; W:XN!
public final static int QUICK = 5; >^V3Z{;
public final static int IMPROVED_QUICK = 6; lV)SOs$
public final static int MERGE = 7; TkjPa};R
public final static int IMPROVED_MERGE = 8; ?[~)D}] j
public final static int HEAP = 9; \[5mBuk
>x6$F*:W}
public static void sort(int[] data) { .0H!B#9
sort(data, IMPROVED_QUICK); %m0x]
} 4}>1I}!k
private static String[] name={ sXmo.{Ayb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "RG #e+
}; cQ<* (KU
Ze>Pg.k+
private static Sort[] impl=new Sort[]{ 4}t&AW4
new InsertSort(), D|BP]j}6
new BubbleSort(), 7IV:X _y
new SelectionSort(), xgQ]#{tG
new ShellSort(), q7'[II;
new QuickSort(), lS:R##
new ImprovedQuickSort(), {Q@pF
new MergeSort(), fqgm`4>
new ImprovedMergeSort(), fpK`
new HeapSort() GOeYw[Vh
}; `'^&* 7,
0XNj!^&
public static String toString(int algorithm){ r31H Zx1^
return name[algorithm-1]; }hjJt,m
} uVBMI.&w
0Q_@2
public static void sort(int[] data, int algorithm) { <(%cb.^c=N
impl[algorithm-1].sort(data); xp>p#c
} 7:_\t!]
6$JRV
public static interface Sort { J&IFn/JK$
public void sort(int[] data); bCmhlSNi
} [Bz'c1
;_^"}
public static void swap(int[] data, int i, int j) { F ;m1I+;
int temp = data; Y}C~&Ph
data = data[j]; zFtwAa=r
data[j] = temp; |5}~n"R5
} GAlAFsB
} rl,6ru