[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; d(:3
} u0`%+:]0
int i1=l; =YG _z^'
int i2=mid+1; Z#.f&K )xX
for(int cur=l;cur<=r;cur++){ mm5$> [%U
if(i1==mid+1) Uje|`<X
data[cur]=temp[i2++]; ?GTU=gpQ
else if(i2>r) B>Wu;a.:L
data[cur]=temp[i1++]; P00f6
else if(temp[i1] data[cur]=temp[i1++]; $v8l0JA *
else H\1qI7N C
data[cur]=temp[i2++]; KQ[!o!%
} }KD;0t4
} StI1){Wf
a=TG[* s
} l6kmS
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改进后的归并排序: .qA{xbu
FWC5&tM
package org.rut.util.algorithm.support; P_u|-~|\
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import org.rut.util.algorithm.SortUtil; d^(1TNS
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/** M.td^l0
* @author treeroot S^Au#1e
* @since 2006-2-2 Tg3!Rq55
* @version 1.0 }qjCTEs}
*/ v_<2H'*Q
public class ImprovedMergeSort implements SortUtil.Sort { iE.-FZc
)wVIb)`R>Y
private static final int THRESHOLD = 10; :SV>+EDY
RmI1`
/* {7MjP+\
* (non-Javadoc) !,Zp? g)
* 8^B;1`#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~ 7)A"t
*/ p h[\)
public void sort(int[] data) { !6}O.Nu
int[] temp=new int[data.length]; L_em')
mergeSort(data,temp,0,data.length-1); :D7|%KK
} oRp:B&
N-w(e
private void mergeSort(int[] data, int[] temp, int l, int r) { Npn=cLC&
int i, j, k; H.G!A6bd
int mid = (l + r) / 2; I^Z8PEc+
if (l == r) [_xyl e
return; dGwszziuK
if ((mid - l) >= THRESHOLD) V,EF'-F
mergeSort(data, temp, l, mid); nY $tp
else iq*A("pU
insertSort(data, l, mid - l + 1); UofTll)
if ((r - mid) > THRESHOLD) ^zEE6i
mergeSort(data, temp, mid + 1, r); 7~M<cD
else eo^/c+FG
insertSort(data, mid + 1, r - mid); $j)hNWI
-RJE6~>'\
for (i = l; i <= mid; i++) { 7-_vY[)/
temp = data; woq)\;CK
} 5.tvB
for (j = 1; j <= r - mid; j++) { Tp<k<uKD
temp[r - j + 1] = data[j + mid]; bzi|s5!'<
} pUl8{YGS
int a = temp[l]; BpLEPuu30
int b = temp[r]; TFDm5XJ
for (i = l, j = r, k = l; k <= r; k++) { Kt#,]]
if (a < b) { DG;y6#|p
data[k] = temp[i++]; VhEMk\
a = temp; 6k?`:QK/sl
} else { >NV=LOO
data[k] = temp[j--]; %~*jae!f
b = temp[j]; g<\z=H
} _x1EZ&dh
} q6`GI6
} 8O1K[sEjui
H^1gy=kdj
/** 7 gB{In0
* @param data /)uM[ dnai
* @param l NE|[o0On
* @param i 0=v{RQ;W4
*/ ^+?|Qfi
private void insertSort(int[] data, int start, int len) { )y7_qxwbV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pJ,@Y>
} ED} 31L
} K X]oE+:
} > 8]j
} rn.\tDeA
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堆排序： j?n+>/sG,
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package org.rut.util.algorithm.support; 2Ohp]G
kpob b
import org.rut.util.algorithm.SortUtil; &~5=K
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/** G%TL/Z40
* @author treeroot '~-IV0v9
* @since 2006-2-2 h[XGC=%
* @version 1.0 6xgv:,
*/ BQ05`nkF
public class HeapSort implements SortUtil.Sort{ ^&c$[~W
iz}sM>^
/* (non-Javadoc) Qu{cB^Ga*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +_HdX w#
*/ k4KHS<n0
public void sort(int[] data) { C>|@& o1
MaxHeap h=new MaxHeap(); {,O`rW_eS
h.init(data); aw}+'(?8]
for(int i=0;i h.remove(); \Rk$t7ZH
System.arraycopy(h.queue,1,data,0,data.length); <rK=9"$y(t
} fAj2LAK
:h";c"
private static class MaxHeap{ <R1X\s.
`hB1b["(
void init(int[] data){ k ~6-cx
this.queue=new int[data.length+1]; rPq<Xb\
for(int i=0;i queue[++size]=data; #w3ru6*W
fixUp(size); VTe.M[:
} :X .,
} Na!za'qk[o
2f:Mm'XdB
private int size=0; =g@9>3~{!
oJaAM|7uv
private int[] queue; V"d=.Hb>
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public int get() { Gm=>!.p
return queue[1]; ^>r^3C)_-
} /3^P_\,>f
xNdIDj@
public void remove() { K^i"9D)A
SortUtil.swap(queue,1,size--); T'rjh"C&|
fixDown(1); O25mkX
} %]Cjhs"v
file://fixdown @sf90&f
private void fixDown(int k) { ]O!s'lC
int j; fCEz-TMW
while ((j = k << 1) <= size) { CD?&<NV
if (j < size %26amp;%26amp; queue[j] j++; (M% ;~y\
if (queue[k]>queue[j]) file://不用交换 rH}fLu8,;Q
break; ~oi_r8K
SortUtil.swap(queue,j,k); C*wdtEGq
k = j; kN'Thq/ZE
} Mz|L-62
} 6 nGY^
private void fixUp(int k) { -gKpL\
while (k > 1) { h-'wV${b
int j = k >> 1; lpEDPvD_Vm
if (queue[j]>queue[k]) P79R~m`
break; kr_oUXiX
SortUtil.swap(queue,j,k); I($,9|9F
k = j; yU`:IMz
} \C\gn]Z
} 8Uj:
{ R*Y=Ie
} 6/y*2z;
ZC\mxBy
} rye)qp|
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SortUtil： .98.G4J>
9.Ap~Ay.
package org.rut.util.algorithm; Kx]> fHK
#Go(tS~o
import org.rut.util.algorithm.support.BubbleSort; <:cpz* G4
import org.rut.util.algorithm.support.HeapSort; FX 1C e
import org.rut.util.algorithm.support.ImprovedMergeSort; dIK{MA
import org.rut.util.algorithm.support.ImprovedQuickSort; +L6" vkz
import org.rut.util.algorithm.support.InsertSort; tP]q4i
import org.rut.util.algorithm.support.MergeSort; ^-L{/'[8M
import org.rut.util.algorithm.support.QuickSort; rsSue_Q
import org.rut.util.algorithm.support.SelectionSort; 6:RMU
import org.rut.util.algorithm.support.ShellSort; g3a/;wl
.;%q/hP
/** i^S2%qz
* @author treeroot y*KC*/'"
* @since 2006-2-2 PdM*5g4
* @version 1.0 '(9YB9 i
*/ 6e:P.HqjA
public class SortUtil { |F~88j{VN
public final static int INSERT = 1; T:#S86m
public final static int BUBBLE = 2; k.>6nho`TV
public final static int SELECTION = 3; l4`^!
public final static int SHELL = 4; ("F)
public final static int QUICK = 5; Kfd_uXL>
public final static int IMPROVED_QUICK = 6; tJ1-DoU
public final static int MERGE = 7; 4.k`[q8
public final static int IMPROVED_MERGE = 8; y$h"ty{g
public final static int HEAP = 9; z.59]\;U>
_@|fva&s,;
public static void sort(int[] data) { AgI>
sort(data, IMPROVED_QUICK); HwW6tQ
} U 1F-~{r
private static String[] name={ 7%opzdS#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #[,= 1Od(q
}; V(I7*_ZFl
@$ftG
private static Sort[] impl=new Sort[]{ /yt7#!tm+
new InsertSort(), {tmKCG
new BubbleSort(), ,]U[W
new SelectionSort(), GRQ_+K
new ShellSort(), n>T:2PQ3
new QuickSort(), [edH%S}\
new ImprovedQuickSort(), r+TK5|ke
new MergeSort(), M4H"].Zm
new ImprovedMergeSort(), i?W]*V~ply
new HeapSort() RK;;b~
}; y;,y"W
EJ8I[(
public static String toString(int algorithm){ z1}1*F"
return name[algorithm-1]; B{=009.
} 2mLUdx~c
Ik-oI=>.
public static void sort(int[] data, int algorithm) { 1(#RN9
impl[algorithm-1].sort(data); x~Pvh+O
} 6mAB(X^+
[lOf|^9
public static interface Sort { |I/,F;'
public void sort(int[] data); Dx0O'uwR
} - &NQ\W
86#-q7aX
public static void swap(int[] data, int i, int j) { 'FqEB]gu
int temp = data; km}MqBQl
data = data[j]; fK);!Hh
data[j] = temp; w=5
} 4y1>
} zw< 4G[u