[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; Xxj- 6i
} 8bGd} (
int i1=l; %X]jaX7
int i2=mid+1; thh.A
for(int cur=l;cur<=r;cur++){ R>|{N9
if(i1==mid+1) Ng&%o
data[cur]=temp[i2++]; - nm"of\o
else if(i2>r) F~ty!(c
data[cur]=temp[i1++]; 4(n-_BS
else if(temp[i1] data[cur]=temp[i1++]; Vsr.=Nd=
else 1NFsb-<u
data[cur]=temp[i2++]; J6"9v;V
} -]Bq|qTH[(
} >tS'Q`R
*][`@@->
} J`Q>3]wL
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改进后的归并排序: 'ycJMYP8
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package org.rut.util.algorithm.support; \<h0Q,e
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import org.rut.util.algorithm.SortUtil; Z3e| UAif
uh_RGM&
/** *tFHM &a
* @author treeroot "s-"<&>a(
* @since 2006-2-2 a~`eQ_ND
* @version 1.0 k8yEdi`
*/ Eh`7X=Z7E
public class ImprovedMergeSort implements SortUtil.Sort { Ufj`euY
m,28u3@r
private static final int THRESHOLD = 10; ;]puq
Y|m+dT6
/* j3oV+zZ49
* (non-Javadoc) \&:nFb%=
* l9~e". ~'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h8j.(
*/ B4/>H|
public void sort(int[] data) { $p8xEcQdU#
int[] temp=new int[data.length]; jdP2Pf^^
mergeSort(data,temp,0,data.length-1); @ y.?:7I
} >{]%F*p4
h^45,E C
private void mergeSort(int[] data, int[] temp, int l, int r) { [^n.Pns
int i, j, k; D8Ic?:iX[
int mid = (l + r) / 2; dbLZc$vPj
if (l == r) >=lC4Tu
return; YDsb3X<0'
if ((mid - l) >= THRESHOLD) ;V_e>TyG
mergeSort(data, temp, l, mid); GAzU?a{S
else H'5)UX@LP
insertSort(data, l, mid - l + 1); eIF5ZPSZi
if ((r - mid) > THRESHOLD) ?,Xw[pR
mergeSort(data, temp, mid + 1, r); je-!4r,
else y1DL,%j
insertSort(data, mid + 1, r - mid); B IEO,W|
+480 l}
for (i = l; i <= mid; i++) { ,pfG
temp = data; M^Yh|%M
} ja'T+!k
for (j = 1; j <= r - mid; j++) { CkC^'V)
temp[r - j + 1] = data[j + mid]; Po;W'7"Po`
} "Y.tht H
int a = temp[l]; !TH) +zi
int b = temp[r]; Kn{4;Xk\
for (i = l, j = r, k = l; k <= r; k++) { _ye |Y
if (a < b) { XX!%RE`M8
data[k] = temp[i++]; q$UJ$7=f8
a = temp; 6v!`1} ~
} else { =?*!"&h
data[k] = temp[j--]; "cGk)s
b = temp[j]; N% B>M7-=
} wu6;.xTLl
} 8rGgF]F
} g-k|>-h
nAato\mM
/** j_[tu!~
* @param data +E+p"7
* @param l rKc9b<Ir
* @param i s^TZXCyF o
*/ \K{ z
private void insertSort(int[] data, int start, int len) { ]c*4J\s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qZh/IW
} aK~8B_5k8
} 8`{:MkXP
} (m}'4et~L
} a!SiX
pF>i-i
堆排序： }&D WaO]J7
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package org.rut.util.algorithm.support; uMv,zO5
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import org.rut.util.algorithm.SortUtil; FxY}m
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/** :Ov6_x]*
* @author treeroot z6P$pqyF
* @since 2006-2-2 *a^(vo
* @version 1.0 B mb0cFQ
*/ V &T~zh1
public class HeapSort implements SortUtil.Sort{ MJ)RvNF
aO[w/cGQ
/* (non-Javadoc) On?v|10r'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l&zilVVm
*/ Oo~; L,
public void sort(int[] data) { W*:.Gxv]
MaxHeap h=new MaxHeap(); 6_;icpN]
h.init(data); MchA{p&Ol
for(int i=0;i h.remove(); h"W,WxL8
System.arraycopy(h.queue,1,data,0,data.length); A{zN| S[
} (mB&m@-N
2pCaX\t
private static class MaxHeap{ %2{ye
Q{>k1$fkV
void init(int[] data){ T763:v
this.queue=new int[data.length+1]; ?j.,Nw4FC
for(int i=0;i queue[++size]=data; {YC@T(
fixUp(size); ]/6z; ~3U
} Ix}sK"}[n
} e`s ~.ZF
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private int size=0; G_JA-@i%
372rbY
private int[] queue; TX/Xt7#R:
,p a {qne
public int get() { 'Is kWgc
return queue[1]; y^*~B(T{
} %;'s4ly
.{^5X)
public void remove() { ^\% (,KNo
SortUtil.swap(queue,1,size--); 8,%^ M9zBP
fixDown(1); 2,F.$X
} ;(%QD 3>
file://fixdown Ax@$+/Z!
private void fixDown(int k) { ~~P5k:
int j; J;e2&gB
while ((j = k << 1) <= size) { C) s5D
if (j < size %26amp;%26amp; queue[j] j++; 0+ '&`Q!u
if (queue[k]>queue[j]) file://不用交换 j (d~aqW
break; "k@/3
SortUtil.swap(queue,j,k); \)[j_^
k = j; & .j&0WE
} ^ytrK Q
} JbbzV>
private void fixUp(int k) { "sCRdx]_
while (k > 1) { xo&_bMO
int j = k >> 1; ^ @5QP$.
if (queue[j]>queue[k]) V!=,0zy~Z
break; *&W"bOMH*
SortUtil.swap(queue,j,k); A)!*]o>U
k = j; x,-75
} ioCsV
} /SB;Von
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} G` A4|+W"
+'a^f5
} m0SlOgRsk
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SortUtil： /~?*=}c^m
A/s?x>QA
package org.rut.util.algorithm; {\5
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import org.rut.util.algorithm.support.BubbleSort; SnfYT)Ph
import org.rut.util.algorithm.support.HeapSort; 4VSU8tK|N]
import org.rut.util.algorithm.support.ImprovedMergeSort; Sm|6 %3
import org.rut.util.algorithm.support.ImprovedQuickSort; VA5xp]
import org.rut.util.algorithm.support.InsertSort; CCx&7f
import org.rut.util.algorithm.support.MergeSort; 9A=,E&
import org.rut.util.algorithm.support.QuickSort; 4HlQ&2O%#
import org.rut.util.algorithm.support.SelectionSort; M2Qr(K|
import org.rut.util.algorithm.support.ShellSort; D@.6>:;il
0e4{{zQx
/** }Y\%RA
* @author treeroot EQM{
* @since 2006-2-2 T8g$uFo
* @version 1.0 i.m^/0!
*/ 5;EvNu
public class SortUtil { ,O(hMI85]
public final static int INSERT = 1; =,M5KDk`
public final static int BUBBLE = 2; *]X'( /b_
public final static int SELECTION = 3; lo+A%\1
public final static int SHELL = 4; :F?C)F
public final static int QUICK = 5; %h@EP[\
public final static int IMPROVED_QUICK = 6; &8lZNv8;(p
public final static int MERGE = 7; e"<OELA
public final static int IMPROVED_MERGE = 8; VPo".BvG6
public final static int HEAP = 9; ,zjv7$L
":ue-=&M
public static void sort(int[] data) { {wKB;?fUvk
sort(data, IMPROVED_QUICK); {<KVx9
} ?caSb=f
private static String[] name={ [W&T(%(W-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4r}51 N\
}; ?@86P|19
%ET+iIhK
private static Sort[] impl=new Sort[]{ g7H(PF?
new InsertSort(), Z T%5T}i
new BubbleSort(), /N{*"s2)
new SelectionSort(), (LCfUI6;
new ShellSort(), })%{AfDRF
new QuickSort(), JZx[W&]zT
new ImprovedQuickSort(), upmx $H>
new MergeSort(), mfr|:i
new ImprovedMergeSort(), z{QqY.Gu{G
new HeapSort() ~"!fP3"e
}; B@ EC5Ap*
Z`i(qCAd(
public static String toString(int algorithm){ %N._w!N<5n
return name[algorithm-1]; 'g\4O3&_
} L4W5EO$
6=C<>c%+
public static void sort(int[] data, int algorithm) { tw@X> G1z
impl[algorithm-1].sort(data); PJ#,2=n~
} ~n_HP_Kf?
He@KV=
public static interface Sort { '&b+R`g'
public void sort(int[] data); jH:[2N?
} f o3}W^0
;uGv:$([g
public static void swap(int[] data, int i, int j) { :3 mh@[V
int temp = data; +}AI@+
data = data[j]; "AqB$^S9t
data[j] = temp; 8oGRLYU N
} 2 %]X+`+O
} AbM'3Mkz