[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; KL:6P-3
} c4qp3B_w
int i1=l; M'>D[5;N~
int i2=mid+1; Ht=6P)
for(int cur=l;cur<=r;cur++){ m_r@t*
if(i1==mid+1) x[.z"$T@
data[cur]=temp[i2++]; Je4.9?Ch
else if(i2>r) 5m%baf2_
data[cur]=temp[i1++]; dc\u$'F@S
else if(temp[i1] data[cur]=temp[i1++]; Yt O@n@1
else u75)>^:I
data[cur]=temp[i2++]; <L!~f`nH2
} U4^p({\|-
} CL<KBmW7
,XBV}y
} Dbkuh!R
c9ov;Bw6S
改进后的归并排序: Q'Q72Fg
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package org.rut.util.algorithm.support; Ls$g-k%c@Q
&[W3e3Asra
import org.rut.util.algorithm.SortUtil; mKf>6/s{c
jV|$? Rcl%
/** LBbo.KxAe3
* @author treeroot G\,A> mT/P
* @since 2006-2-2 ai;gca_P#
* @version 1.0 \{+nXn
*/ .1[2 CjQ
public class ImprovedMergeSort implements SortUtil.Sort { /F8\%l+
1$3XKw'
private static final int THRESHOLD = 10; >m_p\$_
;SlS!6.W-
/* jN'fm
* (non-Javadoc) t\|K"
* asmW W8lz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) abJ@>7V
*/ 3qxG?G N
public void sort(int[] data) { ad3z]dUZ9
int[] temp=new int[data.length]; q$u\ q.
mergeSort(data,temp,0,data.length-1); beHCEwh
} G(|(y=ck
cJ(zidf_$
private void mergeSort(int[] data, int[] temp, int l, int r) { 2t`9_zqLw
int i, j, k; M;vlQ"Yl'
int mid = (l + r) / 2; (HV~ '5D
if (l == r) ,TfI
return; {,-5k.P[
if ((mid - l) >= THRESHOLD) M:1F@\<
mergeSort(data, temp, l, mid); -RqAT1
else nGJIjo_I
insertSort(data, l, mid - l + 1); :86luLFm
if ((r - mid) > THRESHOLD) l"pz )$eE
mergeSort(data, temp, mid + 1, r); (h@yA8>n
else >y06s{[
insertSort(data, mid + 1, r - mid); @#ho(_U8
EBL,E:_)
for (i = l; i <= mid; i++) { Bg+]_:<U
temp = data; Zxxy1Fl#.[
} XdIVMXLL\
for (j = 1; j <= r - mid; j++) { ^s(X VVA
temp[r - j + 1] = data[j + mid]; B 1ZHV^
} 5dNf$a0E
int a = temp[l]; 7^t(RNq
int b = temp[r]; neY=:9
for (i = l, j = r, k = l; k <= r; k++) { PHiX:0zT
if (a < b) { cT=wJ
data[k] = temp[i++]; #NQz&4W
a = temp; 6<Pg>Bg
} else { + x;ML
data[k] = temp[j--]; 5N3!!FFE
b = temp[j]; HfeflGme*
} ]R0A{+]n
} t1{%FJ0F
} Qpv}N*v^
f$S QhK5`
/** W!4V:(T
* @param data W.6JnYLQ&
* @param l >~wk
* @param i 3f2Hjk7,d
*/ }vxH)U6$q
private void insertSort(int[] data, int start, int len) { ;R|#ae@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~:b:_ 5"
} gc8PA_bFz
} ]gZ8b- 2O
} DEwtP
} -.Pu5et4
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堆排序： T#_n-b>
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package org.rut.util.algorithm.support; 6RT0\^X*:
>\oJ&gdc
import org.rut.util.algorithm.SortUtil; F?,&y)ri
)!*M 71
/** Q3O .<9S
* @author treeroot .8PO7#
* @since 2006-2-2 %d#)({N
* @version 1.0 $J0~2TV<
*/ Gx*0$4xJ3
public class HeapSort implements SortUtil.Sort{ |e[0Qo@
xjbyI_D
/* (non-Javadoc) llG#nDe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gWv+i/,
*/ [QqNsco)
public void sort(int[] data) { Q]g4gj
MaxHeap h=new MaxHeap(); %FI6\|`M
h.init(data); 1 l*(8!_
for(int i=0;i h.remove(); q{+poVX
System.arraycopy(h.queue,1,data,0,data.length); Yg,WdVI&@
} FR6I+@ oX~
k42ur)pb
private static class MaxHeap{ &@iF!D\u
@SG="L
void init(int[] data){ 8\.1m9&r>o
this.queue=new int[data.length+1]; XQY&4tK
for(int i=0;i queue[++size]=data; ?G>TaTiK#
fixUp(size); E!~2\qKT
} &b6@_C9
} I\%Lb z
>h( rd1
private int size=0; `FB?cPR
C<@1H>S4_
private int[] queue; Qp.!U~
sPTUGx'
public int get() { a<"& RnG(
return queue[1]; ?_j6})2zY
} p}zk&`
c%Cae3;
public void remove() { zUtf&Ih
SortUtil.swap(queue,1,size--); 7>@/*S{X
fixDown(1); t\bxd`,
} m;+1;B
file://fixdown OmjT`,/
private void fixDown(int k) { =yhfL2`aw
int j; ]9< 9F ?
while ((j = k << 1) <= size) { UpseU8Wo
if (j < size %26amp;%26amp; queue[j] j++; FRQ("6(
if (queue[k]>queue[j]) file://不用交换 jLS]^|
break; {ro!OuA
SortUtil.swap(queue,j,k); 7`<? fO
k = j; X6*y/KGN
} &r5%WRzpYT
} mL5f_Fb+
private void fixUp(int k) { wR+`("2{r
while (k > 1) { >upUY(3&
int j = k >> 1; RkP|_Bf8)
if (queue[j]>queue[k]) $5CY<,f
break; 9x^ /kAB
SortUtil.swap(queue,j,k); Afhx`J1KO
k = j; rkc%S5we
} 54cgX)E[x
} >37}JUG
x Bw.M{
} V+~{a:8[pq
|=}~>!!
} I%C:d#p
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SortUtil： [#6Esy8|
F8;4Oj
package org.rut.util.algorithm; EjE`S_i=
XTaWd0Y
import org.rut.util.algorithm.support.BubbleSort; RW[<e
import org.rut.util.algorithm.support.HeapSort; x2c*k$<p
import org.rut.util.algorithm.support.ImprovedMergeSort; A?k,}~
import org.rut.util.algorithm.support.ImprovedQuickSort; 'wlP`7&Tn
import org.rut.util.algorithm.support.InsertSort; 7.rZ%1N
import org.rut.util.algorithm.support.MergeSort; J3S+| x h~
import org.rut.util.algorithm.support.QuickSort; -?`l<y(
import org.rut.util.algorithm.support.SelectionSort; N_[ Q.HD"
import org.rut.util.algorithm.support.ShellSort; w/W?/1P>q
~EkGG .
/** 9+Bq00-Z$
* @author treeroot Prx s2 i 8
* @since 2006-2-2 H>X1(sh#}
* @version 1.0 7tKft
*/ sZBO_](S
public class SortUtil { g}r5ohqC#
public final static int INSERT = 1; 3^yWpSC
public final static int BUBBLE = 2; Mf13@XEo
public final static int SELECTION = 3; K2`WcEe
public final static int SHELL = 4; <U`Nb) &
public final static int QUICK = 5; tS|zf,7
public final static int IMPROVED_QUICK = 6; ^l9 *h
public final static int MERGE = 7; jV&W[xKa
public final static int IMPROVED_MERGE = 8; -"9)c^KVx
public final static int HEAP = 9; 0M2+?aKif
]!o,S{a&
public static void sort(int[] data) { 5<?$/H|7T
sort(data, IMPROVED_QUICK); vbh#[,lh
} TEZqAR]G
private static String[] name={ <[l}^`IC^4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]JuB6o_L
}; r9*H-V$
7gmMqz"z(>
private static Sort[] impl=new Sort[]{ VZ@@j[F(
new InsertSort(), 1U9N8{xg9
new BubbleSort(), HcS^3^Y
new SelectionSort(), F4(U~n<
new ShellSort(), ,.MG&O
new QuickSort(), 8>;o MM
new ImprovedQuickSort(), Yx c >+mx
new MergeSort(), 3-%~{(T/
new ImprovedMergeSort(), @soW f
new HeapSort() 3edK$B51;
}; Vzm7xl [
ZaindX{.1
public static String toString(int algorithm){ 6.=1k
return name[algorithm-1]; jF85bb$
} tzJtd
=H?5fT^
public static void sort(int[] data, int algorithm) { oD1=}
impl[algorithm-1].sort(data); HOb\Hn|6jq
} Z i&X ,K~
3PeJPw
public static interface Sort { |]b/5s;>
public void sort(int[] data); 8so}^2hTlT
} _Fy:3,(
PP|xIAc
public static void swap(int[] data, int i, int j) { $& gidz/w
int temp = data; Gfch|Q^INy
data = data[j]; !`E2O*g
data[j] = temp; '-TFrNO;h
} o|E(_Y4d
} Kx!|4ya,