[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; {*F8'6YQ$
} \3rgwbF
int i1=l; ~^3U@(:
int i2=mid+1; sw(|EZ7F
for(int cur=l;cur<=r;cur++){ 7Sycy#D
if(i1==mid+1) );p:[=$71
data[cur]=temp[i2++]; N40DL_-
else if(i2>r) i Hcy,PBD
data[cur]=temp[i1++]; \gir
else if(temp[i1] data[cur]=temp[i1++]; @zsqjm
else ~P-^An^
data[cur]=temp[i2++]; \VAS<?3
} .T~Oc'wGo
} +'g~3A-G
9$R}GK
} oHethk
_6sSS\
改进后的归并排序: s<LYSrd
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package org.rut.util.algorithm.support; <q4<3A
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import org.rut.util.algorithm.SortUtil; W_]onq6
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/** ?ieC>cr
* @author treeroot q+9c81b
* @since 2006-2-2 D'_w *
* @version 1.0 eC$ Jdf
*/ ? C6tYd
public class ImprovedMergeSort implements SortUtil.Sort { Gl>*e|}
c38ENf
private static final int THRESHOLD = 10; @ql S #(
$?|$uMIafp
/* vSJ# }&
* (non-Javadoc) v==/tr)
* IKeO&]k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C.VU"= -
*/ WP?AQD
public void sort(int[] data) { U;Q?Rh-W
int[] temp=new int[data.length]; EUuk%<q7C(
mergeSort(data,temp,0,data.length-1); _VLA2#V>
} AKUmh
3TnrPO1E
private void mergeSort(int[] data, int[] temp, int l, int r) { z~RE}k
int i, j, k; z7]GZF
int mid = (l + r) / 2; Jw -3G3h
if (l == r) ~:"//%M3l
return; ;Z-%'5hKM
if ((mid - l) >= THRESHOLD) ^qNr<Ye
mergeSort(data, temp, l, mid); YyD0g9{
else 2j-^F
insertSort(data, l, mid - l + 1); SH1)@K-
if ((r - mid) > THRESHOLD) K\^S>dV
mergeSort(data, temp, mid + 1, r); Y/,Cy0!
else 9 EV.![
insertSort(data, mid + 1, r - mid); ]R]%c*tA
a/lTQj]A
for (i = l; i <= mid; i++) { )s>R~7
temp = data; ;^|:*
} :$&v4IW
for (j = 1; j <= r - mid; j++) { }6 MoC0
temp[r - j + 1] = data[j + mid]; qPgny/(
} zIbrw9G
int a = temp[l]; X~ g9TUv8
int b = temp[r]; f2Z(hYH~
for (i = l, j = r, k = l; k <= r; k++) { 1R7w
if (a < b) { \vqqs
data[k] = temp[i++]; Q-y`IPtA<
a = temp; em?Q4t
} else { irKM?#h
data[k] = temp[j--]; wYN/ }>M
b = temp[j]; J)="Im)
} NbUbLzE
} I@:"Qee
} V&J'2Lq
w7QYWf'
/** g0:{{w
* @param data Nd%j0lj
* @param l jUd)|v+t
* @param i :HkXsZ
*/ !p{CsR8c
private void insertSort(int[] data, int start, int len) { -nDY3$U/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z2[{3Kd*
} o4nDjFhh
} $Ahe Vps@@
} WlmkM?@
} [Lq9lw&
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堆排序： ,#K{+1z:
|H>;a@2d
package org.rut.util.algorithm.support; 1;eWnb(
nt$q< 57
import org.rut.util.algorithm.SortUtil; @IV,sze
zQaD&2 q
/** Q+ZZwqyxD
* @author treeroot #O^%u,mJj
* @since 2006-2-2 eD!mR3Ai@D
* @version 1.0 Q2<v: *L
*/ 2 :wgt
public class HeapSort implements SortUtil.Sort{ h`f$]_c
}Dx.;0*:
/* (non-Javadoc) ~,.'#=V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "D'"uMS`H
*/ aATNeAR
public void sort(int[] data) { F(|XJN
MaxHeap h=new MaxHeap(); }!V-FAL
h.init(data); yf/i)
for(int i=0;i h.remove(); k5)a|
System.arraycopy(h.queue,1,data,0,data.length); !wTrWD!
} Sm;@MI<@/
lN*beOj
private static class MaxHeap{ ; *\xdg{d
LZ RP}|
void init(int[] data){ n0g8B
this.queue=new int[data.length+1]; D!&]jkUN
for(int i=0;i queue[++size]=data; iw%""q(`
fixUp(size); DMlr%)@{
} Hb0_QT~
} %F\.1\&eE
g)7@EU2
private int size=0; *Sps^Wl
G|u)eW
private int[] queue; 9 !$&1|,*
%<fs \J^k
public int get() { AG><5 }
return queue[1]; 6Ta+f3V
} -kHJH><j
A?ho<@^
public void remove() { WtO@Kf:3GH
SortUtil.swap(queue,1,size--); ~O|~M_Z
fixDown(1); *Qyu QF
} LXaq
file://fixdown /B)2L]6p
private void fixDown(int k) { ~tn$AtK
int j; r+k&W
while ((j = k << 1) <= size) { 6|IJwP^Q_
if (j < size %26amp;%26amp; queue[j] j++; .5);W;`X
if (queue[k]>queue[j]) file://不用交换 &2S-scP
break; +;4;~>Y
SortUtil.swap(queue,j,k); uIBN !\j
k = j; !{fu(E
} ;e.8EL
} z?pi/`y8>
private void fixUp(int k) { bg|dV
while (k > 1) { ;M~9Yr=1
int j = k >> 1; #<X4RJ
if (queue[j]>queue[k]) (V1;`sI8
break; -xbs'[
SortUtil.swap(queue,j,k); (H"{r
k = j; :s\zk^h?
} "?<(-,T
} $B7c\MR j
.)=*Yr M
} <B>hvuCoH
EIfqRRTA
} {~w(pAx
/nsBUM[;
SortUtil： Zb2PFwcy
}a#T\6rY
package org.rut.util.algorithm; %|ClYr
Ghc U~
import org.rut.util.algorithm.support.BubbleSort; !3iZa*
import org.rut.util.algorithm.support.HeapSort; `JY+3d,Ui
import org.rut.util.algorithm.support.ImprovedMergeSort; 5*+DN U@
import org.rut.util.algorithm.support.ImprovedQuickSort; *rbgDaQ
import org.rut.util.algorithm.support.InsertSort; Z6rZAwy
import org.rut.util.algorithm.support.MergeSort; V)`A,7X
import org.rut.util.algorithm.support.QuickSort; \4^zY'
import org.rut.util.algorithm.support.SelectionSort; ?@Q0;LG
import org.rut.util.algorithm.support.ShellSort; 63J3NwFt
8EMBqhl
/** V8nQ/9R;
* @author treeroot x;`Gn_
* @since 2006-2-2 ij#v_~g3
* @version 1.0 ^#C+l
*/ lNf);!}SM
public class SortUtil { jSM`bE+"
public final static int INSERT = 1; _'17C/
public final static int BUBBLE = 2; d}tmZ*q
public final static int SELECTION = 3; .AOc$Nt
public final static int SHELL = 4; DU8\1(
public final static int QUICK = 5; "U"fsAc#
public final static int IMPROVED_QUICK = 6; $]Ix(7@W
public final static int MERGE = 7; D\+x/r?-I
public final static int IMPROVED_MERGE = 8; f0Q! lMv
public final static int HEAP = 9; ,YjjL
}!k?.(hpE
public static void sort(int[] data) { '3U,UD5EG
sort(data, IMPROVED_QUICK); r7>FH!=:
} n0gjcDHQ
private static String[] name={ AzF*4x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w'A*EWO
}; N\&VJc
d*e8P ep
private static Sort[] impl=new Sort[]{ d}fd^x/
new InsertSort(), /Dd x[P5p=
new BubbleSort(), _<jU! R
new SelectionSort(), BeQ'\#q,
new ShellSort(), ~Q Q1ZP3
new QuickSort(), &Ep$<kx8
new ImprovedQuickSort(), c^'bf_~-W
new MergeSort(), Sin)]zG~0
new ImprovedMergeSort(), r}e(MT:R'
new HeapSort() dc4XX5Z
}; ME]7e^
E#Ue9J
public static String toString(int algorithm){ \'u+iB g
return name[algorithm-1]; qGR1$\]
} %%n&z6w-
UtJfO`m9P
public static void sort(int[] data, int algorithm) { .pe.K3G&
impl[algorithm-1].sort(data); /6[vF)&
} 9[*P`*&
i( +Uvtgs
public static interface Sort { g8&& W_BI
public void sort(int[] data); % q!i
} ,wg(}y'
F?MVQ!K*
public static void swap(int[] data, int i, int j) { @XL49D12c
int temp = data; SJO*g&duQ
data = data[j]; z;@<J8I
data[j] = temp; r/0#D+A
} DwFvM0O6\
} G@~e:v)