[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; '+o:,6
} Fpj6Atk
int i1=l; pRQfx^On
int i2=mid+1; !A'`uf4u
for(int cur=l;cur<=r;cur++){ zCKy`u.
if(i1==mid+1) |1dEs,z\
data[cur]=temp[i2++]; g5kYyE
else if(i2>r) OmTZ-*N
data[cur]=temp[i1++]; w\"n!^ms
else if(temp[i1] data[cur]=temp[i1++]; eh({K;>
else ]C}u-B746
data[cur]=temp[i2++]; HI"!n$p
} 2x<Qt2"
} BiHiVhD_
&=s|
} 6e$sA (a=i
9B!im\]O
改进后的归并排序: >wg9YZ~8
}@ O|RkY
package org.rut.util.algorithm.support; O84v*=uA
!1a|5 xrn
import org.rut.util.algorithm.SortUtil; b'Fx),
(ybtXoQs
/** br34Eh
* @author treeroot O?C-nw6kP
* @since 2006-2-2 "oE^R?m
* @version 1.0 D,}'E0
*/ $nGbT4sc
public class ImprovedMergeSort implements SortUtil.Sort { Z,|1G6f@
f_re"d 3u
private static final int THRESHOLD = 10; 5{R#h :
dI#8CO
/* M5cOz|j/*R
* (non-Javadoc) `_J^g&y~
* b2/N H1A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :f?,]|]+-
*/ SQ~N X)
public void sort(int[] data) { a`EGx{q(
int[] temp=new int[data.length]; :|n>H+Y
mergeSort(data,temp,0,data.length-1); X%4uShM
} `5k6s,
%vf2||a$BS
private void mergeSort(int[] data, int[] temp, int l, int r) { v GR \GFm
int i, j, k; 6mI_Q2
int mid = (l + r) / 2; wZ]BY;
if (l == r) .gM>FUH3L
return; e_>rJWI}
if ((mid - l) >= THRESHOLD) o-Q]Dk1W
mergeSort(data, temp, l, mid); lJ2|jFY9
else xu%! b0
insertSort(data, l, mid - l + 1); [}9XHhY1O=
if ((r - mid) > THRESHOLD) a O"nD_7
mergeSort(data, temp, mid + 1, r); h0QYoDvbC
else ctc`^#q
insertSort(data, mid + 1, r - mid); lry&)G=5
D_yY0rRM
for (i = l; i <= mid; i++) { :kp
temp = data; %|D\j-~
} ;G4HMtL
for (j = 1; j <= r - mid; j++) { |7S4;
temp[r - j + 1] = data[j + mid]; 7kX7\[zN
} 2vh!pez_
int a = temp[l]; JL.ydH79
int b = temp[r]; (:fE _H2z
for (i = l, j = r, k = l; k <= r; k++) { -_{C+Y_
if (a < b) { l$p_])x
data[k] = temp[i++]; (Qx-KRH
a = temp; VeN&rjc
} else { T4HoSei
data[k] = temp[j--]; siss_1J
b = temp[j]; I7q?V1fu4
} k[r./xEv+t
} !dbA (
} ^EuyvftZ
os(Jr!p_=
/** w}U5dM`
* @param data 9p[W :)P4d
* @param l 7uv/@(J"$
* @param i 8JtI&aH-L
*/ Z0F>"Z_qn
private void insertSort(int[] data, int start, int len) { TN |{P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l|ZzG4]+l
} p+`*~6Jj/
} *0&i'0>
} #)PGQ)(
} MOqA$b
VH7iH|eW
堆排序： W3o}.|]
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package org.rut.util.algorithm.support; OO !S w
SRG!G]?-
import org.rut.util.algorithm.SortUtil; !7ZfT?&
bW 86Iw
/** y1\^v_.^
* @author treeroot hBfzU\*0H
* @since 2006-2-2 B GEJiLH
* @version 1.0 c>U{,z
*/ G7_"^r%c9;
public class HeapSort implements SortUtil.Sort{ wWOT*R_
2ucF(^
/* (non-Javadoc) j3rv2W\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , R.+-X
*/ ,a]~hNR*X
public void sort(int[] data) { g]iy-,e
MaxHeap h=new MaxHeap(); Y%CL@G60
h.init(data); 5>1Y="B
for(int i=0;i h.remove(); /H;kYx
System.arraycopy(h.queue,1,data,0,data.length); T24#gF~
} E?m#S
^zWO[$n}tP
private static class MaxHeap{ }%>$}4 ,
IjB*myN.
void init(int[] data){ Z;~E+dXC
this.queue=new int[data.length+1]; |Z7bd^
for(int i=0;i queue[++size]=data; !{]v='
fixUp(size); oVEr{K)
} ,5<`+w#a
} TNFm7}=
L$u&~"z-
private int size=0; qT<qu(V:
rCSG@D.
private int[] queue; [-Dgo1}Qr
eVCkPv*
public int get() { ?;KJ (@Va
return queue[1]; |L_g/e1A3
} cdtzf:#q
HyX4ob[X
public void remove() { eR* ]<0=
SortUtil.swap(queue,1,size--); FUqhSW
fixDown(1); <C.$Db&9
} RkH oT^
file://fixdown f\F_?s)_y
private void fixDown(int k) { ?9r,Y;,H
int j; G}dOx}kT
while ((j = k << 1) <= size) { Lq $4.l[j
if (j < size %26amp;%26amp; queue[j] j++; 2W:?#h3
if (queue[k]>queue[j]) file://不用交换 }b]y 0"
break; kJ<Xq
SortUtil.swap(queue,j,k); In9|n^=H@
k = j; jVFRqT%
} HH~ du
} @#--dOWYR
private void fixUp(int k) { agxSb^ 8tF
while (k > 1) { L^al1T
int j = k >> 1; H'h4@S
if (queue[j]>queue[k]) =3v 1]7X
break; UVBw;V
SortUtil.swap(queue,j,k); W$MEbf%1
k = j; iQ}sp64
} *6x^w%=A
} :qSi>KCGh
)|^<woli,
} 5wFS.!xD
`E0.PV
} ~lalc ^
<,cIc]eX
SortUtil： \,bFm,kC?
Y %D*O
package org.rut.util.algorithm; WWs[]zr
g@6X|W5,J
import org.rut.util.algorithm.support.BubbleSort; pS@VLXZP
import org.rut.util.algorithm.support.HeapSort; gK#fuQ$hH
import org.rut.util.algorithm.support.ImprovedMergeSort; x<y[na
import org.rut.util.algorithm.support.ImprovedQuickSort; fJ"~XTN}T
import org.rut.util.algorithm.support.InsertSort; L+ETMk0
import org.rut.util.algorithm.support.MergeSort; gZ>orZL'
import org.rut.util.algorithm.support.QuickSort; w4MMo
import org.rut.util.algorithm.support.SelectionSort; & Dl'*|
import org.rut.util.algorithm.support.ShellSort; JX@6Sg<
aj'8;E+
/** }L7F g%,
* @author treeroot J'^$|/Q
* @since 2006-2-2 1>@|
* @version 1.0 F-7b`cF9[r
*/ KsU&<eQ
public class SortUtil { {_X1&&>8/
public final static int INSERT = 1; :8|3V~%m
public final static int BUBBLE = 2; *Qwhi&k
public final static int SELECTION = 3; KRR^?
public final static int SHELL = 4; <<zz*;RJJ
public final static int QUICK = 5; 6M vRR
public final static int IMPROVED_QUICK = 6; 7 }MJK)
public final static int MERGE = 7; -0IFPL8
public final static int IMPROVED_MERGE = 8; V45Udwp^
public final static int HEAP = 9; yY-t4WeXP
=qR7-Q8B
public static void sort(int[] data) { DHNii_w4v
sort(data, IMPROVED_QUICK); !2M[
} K2o0L5Lke
private static String[] name={ -[7,ph
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #.L0]Uqcp
}; 3)Awj++
T0"0/{5-_
private static Sort[] impl=new Sort[]{ Eno2<<
new InsertSort(), CU^3L|f2N
new BubbleSort(), @C [|'[xQ
new SelectionSort(), ,~?A. 5
new ShellSort(), iK:qPrk-
new QuickSort(), -L50kk>h
new ImprovedQuickSort(), nMdN$E
new MergeSort(), ^5 =E`q".
new ImprovedMergeSort(), $JSC+o(q3#
new HeapSort() Qufv@.'AY
}; o-<_X&"a|5
M "P
public static String toString(int algorithm){ QOy&!6
return name[algorithm-1]; z.Kq}r^
} wp GnS
Rf0\CEc
public static void sort(int[] data, int algorithm) { Fl3r!a!P,
impl[algorithm-1].sort(data); d47:2Zj
} +C;#Qf
4bi\$
public static interface Sort { } 9s
public void sort(int[] data); glX2L~
} ;Y&?ixx
XaS_3d
public static void swap(int[] data, int i, int j) { ^PR,TR.
int temp = data; -R \@W q@
data = data[j]; k3.p@8@:
data[j] = temp; T9<nD"=:
} Zy3&Zt
} gN'i+mQcu