[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; i~K~Czmok+
} X_%78$N-a`
int i1=l; #lJF$
int i2=mid+1; P_b00",S
for(int cur=l;cur<=r;cur++){ |W#^L`!G
if(i1==mid+1) {?5EOp~
data[cur]=temp[i2++]; ,{E'k+
else if(i2>r) Xc Pn
data[cur]=temp[i1++]; pdtK3Pf
else if(temp[i1] data[cur]=temp[i1++]; +d#ZSNu/
else q=96Ci_a
data[cur]=temp[i2++]; C}+(L3Z
} jriliEz;f
} ia?8Z"&lK
B'~.>,fg
} A;2?!i#f
F}sfk}rp
改进后的归并排序: r-'j#|^tz
R \`,Q'3
package org.rut.util.algorithm.support; {BKI8vy
:j9;P7&"?
import org.rut.util.algorithm.SortUtil; qPzgGbmD9
*B3` #t
/** \J1Jn~
* @author treeroot [8)Zhw$
* @since 2006-2-2 t3bN PK^
* @version 1.0 XqJ@NgsY
*/ C/]0jAAE7
public class ImprovedMergeSort implements SortUtil.Sort { ["@K~my~D*
lHP[WO
private static final int THRESHOLD = 10; 8.9S91]=
1h)I&T"kZ
/* ,Zs-<e"
* (non-Javadoc) 4|Z3;;%+
* C:P,q6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CZbp}:|
*/ :L\@+}{(c
public void sort(int[] data) { m _:ib}
int[] temp=new int[data.length]; D$ `yxc
mergeSort(data,temp,0,data.length-1); M4')gG;
} ;itz`9T
4'X^YBm
private void mergeSort(int[] data, int[] temp, int l, int r) { JsiJ=zo<
int i, j, k; }|A%2!Q}
int mid = (l + r) / 2; #kV=;(lq
if (l == r) %Xp}d5-
return; F!SmCE(0x
if ((mid - l) >= THRESHOLD) {)k}dr
mergeSort(data, temp, l, mid); [m('Y0fwO^
else BQw#PXp3
insertSort(data, l, mid - l + 1); 9nd'"$
if ((r - mid) > THRESHOLD) z?E:s.4F
mergeSort(data, temp, mid + 1, r); nk6xavQji
else r[~Km5
insertSort(data, mid + 1, r - mid); ]LP&v3
QF\NHV
for (i = l; i <= mid; i++) { >gVR5o
temp = data; srC'!I=s>8
} f#mY44:,C
for (j = 1; j <= r - mid; j++) { TQnMPELh"
temp[r - j + 1] = data[j + mid]; 'VO^H68
} PW.W.<CL
int a = temp[l]; Fdvex$r&
int b = temp[r]; <4(rY9
for (i = l, j = r, k = l; k <= r; k++) { 5GpRN
if (a < b) { ]A!Gr(FHQ
data[k] = temp[i++]; |yQ3H)qB#
a = temp; #x"pG
} else { c: #1Aym
data[k] = temp[j--]; 9~u1fk{
b = temp[j]; !@bN
} YFsEuaV
} m: w/[|_
} :Fm+X[n
Pm;"Y!S<
/** #ljfcQm
* @param data ZEHz/Y%
* @param l HfmTk5|/
* @param i L6U[H#3(
*/ YMJjO0
private void insertSort(int[] data, int start, int len) { i mJ{wF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mDj:w#q
} 6)DYQ^4y
} |QxDjL<&t4
} G?8,&jP~T
} P3@[x
OGh bHa
堆排序： v>0xHQD*<M
TX8,+s+
package org.rut.util.algorithm.support; Xt9?7J#\T
%.[GR
import org.rut.util.algorithm.SortUtil; >dZ x+7
K3 "co1]u
/** 0}HKmEM
* @author treeroot knF *~O :y
* @since 2006-2-2 #CVD:p
* @version 1.0 uKtrG,/ p
*/ 875V{fvPBU
public class HeapSort implements SortUtil.Sort{ ZYkeW
f@>27&'WV
/* (non-Javadoc) 8[}MXMRdb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;xwa,1]
*/ <W\~A$
public void sort(int[] data) { 5/Swn9vwl
MaxHeap h=new MaxHeap(); o-7>^wV%BD
h.init(data); Z.VVY\
for(int i=0;i h.remove(); %n!s{5:F
System.arraycopy(h.queue,1,data,0,data.length); 8M:;9a8fh
} R-hqaEB
!]5F2~"v
private static class MaxHeap{ g4%x7#vz0
&87D.Yy^
void init(int[] data){ 1<fEz
this.queue=new int[data.length+1]; '{U56^b]
for(int i=0;i queue[++size]=data; YceiP,!4?v
fixUp(size); 4$ejJaE
} "hpK8vQ
} m5f/vb4l
A-.jv
private int size=0; Fi(_A
rN}{v}n
private int[] queue; RR^I*kRH
0B1*N_.L@
public int get() { >iWl-hI-
return queue[1]; }q27M
} 0>Ecm#
<;SMczR
public void remove() { Alh%Z\
SortUtil.swap(queue,1,size--); WynHcxC
fixDown(1); ;c<:"ad(
} JTl 37j
file://fixdown ,Ea.ts>
private void fixDown(int k) { 0qZ{:}`3
int j; 0Q%'vBX\`
while ((j = k << 1) <= size) { j[) i>Qw
if (j < size %26amp;%26amp; queue[j] j++; z`5+BL,|ND
if (queue[k]>queue[j]) file://不用交换 xzIs,i}U
break; F!j@b!J8
SortUtil.swap(queue,j,k); r'pFHX
k = j; _W tSZmW?
} kw|bEL9!u
} d/Fjs0pt
private void fixUp(int k) { E{Y0TZ+
while (k > 1) { ObMsncn
int j = k >> 1; )d0&iE`@
if (queue[j]>queue[k]) NzNAhlXj3
break; c3i|q@ k
SortUtil.swap(queue,j,k); e+4p__TmZ
k = j; ^/mQo`[G
} : bT*cgD{
} 8r)eiERv
%NX
} #qm<4]91
BxO2w1G
} u\&oiwSIP
n4(w?,w}
SortUtil： ANp4yy+
-5kq9Dy\,
package org.rut.util.algorithm; sVaWg?=qs'
<`*6;j.&
import org.rut.util.algorithm.support.BubbleSort; u=#LY$
import org.rut.util.algorithm.support.HeapSort; !bT0kP$3}
import org.rut.util.algorithm.support.ImprovedMergeSort; v?n`kw
import org.rut.util.algorithm.support.ImprovedQuickSort; ]n\WCU]0
import org.rut.util.algorithm.support.InsertSort; Fov/?:f$
import org.rut.util.algorithm.support.MergeSort; t*e+[
import org.rut.util.algorithm.support.QuickSort; +5?sYp\
import org.rut.util.algorithm.support.SelectionSort; u#la+/
import org.rut.util.algorithm.support.ShellSort; 9%kY8#%SV
-!(3fO:
/** \9@*Jgpd6*
* @author treeroot {eqUEdC
* @since 2006-2-2 #B)/d?aa'
* @version 1.0 m{(D*Vuqd
*/ = J).(E89
public class SortUtil { 1\kOjF)l
public final static int INSERT = 1; 6<sB
public final static int BUBBLE = 2; 5|S|HZ8G
public final static int SELECTION = 3; (3c,;koRR
public final static int SHELL = 4; 52wq<[#tK
public final static int QUICK = 5; dSk\J[D
public final static int IMPROVED_QUICK = 6; :]=Y1*L\)
public final static int MERGE = 7; )|uPCZdLZ
public final static int IMPROVED_MERGE = 8; qJ#?=ITE
public final static int HEAP = 9; g4RkkoZ>)
&Mo=V4i>
public static void sort(int[] data) { T*-*U/
sort(data, IMPROVED_QUICK); 0f;L!.eP
} @*%Q,$
private static String[] name={ jr"yIC_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <s]K~ Vo
}; 9SC#N5V
^X[Kr=:Jp
private static Sort[] impl=new Sort[]{ 3=T<c?[
new InsertSort(), N$p}rh#7{
new BubbleSort(), i*W8_C:S
new SelectionSort(), Uu>YE0/)
new ShellSort(), ( F0.lDZ
new QuickSort(), sjWhtd[fgG
new ImprovedQuickSort(), 2"yzrwZ:
new MergeSort(), D#W{:_f
new ImprovedMergeSort(), n_.2B$JD
new HeapSort() j4ypXPY``!
}; s2b!Nib
?n\~&n'C
public static String toString(int algorithm){ H6bomp"
return name[algorithm-1]; V1xpJ
} \ $X3n\
`:i|y
public static void sort(int[] data, int algorithm) { '[`.&-;
impl[algorithm-1].sort(data); +CX2W('
} F@"Xd9q?
SO]x^+[
public static interface Sort { jWUN~#p!
public void sort(int[] data); u?Iop/b
} +g7Iu! cA
Q%o
public static void swap(int[] data, int i, int j) { o@EV>4e y
int temp = data; @UkcvhH
data = data[j]; e0(loWq]
data[j] = temp; PPPRO.y
} { tim{nV
} o PR^Z pt