[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; g1&GX(4[
} {?5EOp~
int i1=l; BJW;A>@Pj
int i2=mid+1; Xc Pn
for(int cur=l;cur<=r;cur++){ k)S7SbQ
if(i1==mid+1) q=96Ci_a
data[cur]=temp[i2++]; C}+(L3Z
else if(i2>r) jriliEz;f
data[cur]=temp[i1++]; B'~.>,fg
else if(temp[i1] data[cur]=temp[i1++]; A;2?!i#f
else F}sfk}rp
data[cur]=temp[i2++]; [0J0<JnK
} R \`,Q'3
} \UNw43EL
n'M}6XUw
} [=LQ,e$r7
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改进后的归并排序: 2RM0ca_F
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package org.rut.util.algorithm.support; @8/-^Rh*
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import org.rut.util.algorithm.SortUtil; )ZiJl5l@
{H0B"i
/** wl9E
* @author treeroot cT.1oaAM0
* @since 2006-2-2 "J[Crm
* @version 1.0 Gia_B6*Y[
*/ oq0G@
public class ImprovedMergeSort implements SortUtil.Sort { 0eUsvzz15
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private static final int THRESHOLD = 10; N2~DxVJ5cT
L\n_q6n
/* 6.K)uQgjmv
* (non-Javadoc) OFDPtJwV
* 1}V_:~7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /u#uC(Uwl
*/ }dB01Jl '
public void sort(int[] data) { s6KZV@1
int[] temp=new int[data.length]; q$H'u[KQ06
mergeSort(data,temp,0,data.length-1); iLS'47
} m\jp$
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private void mergeSort(int[] data, int[] temp, int l, int r) { ((t8
int i, j, k; BQw#PXp3
int mid = (l + r) / 2; 9nd'"$
if (l == r) z?E:s.4F
return; UHR)]5Lt
if ((mid - l) >= THRESHOLD) v)X1R/z5xw
mergeSort(data, temp, l, mid); NCl={O9<j
else .Olq_wuH
insertSort(data, l, mid - l + 1); >eJk)qM
if ((r - mid) > THRESHOLD) Zkxt>%20~
mergeSort(data, temp, mid + 1, r); x2K.5q>
else hEEbH@b
insertSort(data, mid + 1, r - mid); *=r,V
<L5[#V_
for (i = l; i <= mid; i++) { %JiA,
temp = data; Vl'|l)b4W
} BBy/bc!
for (j = 1; j <= r - mid; j++) { 8HTV"60hTs
temp[r - j + 1] = data[j + mid]; oYqlN6n,=6
} b]*9![_
int a = temp[l]; <EpP;
int b = temp[r]; (u$Q
for (i = l, j = r, k = l; k <= r; k++) { m2VF}% EIr
if (a < b) { ~":?})
data[k] = temp[i++]; "-^TA_XfI
a = temp; L! Q&?xP
} else { ZRcY; ?
data[k] = temp[j--]; }vcC4 =t/
b = temp[j]; KZ<zsHX8H
} @gs Kb*,
} sFB; /*C
} zf2]|]*xz
\.Q"fd?a_D
/** f3*u_LO
* @param data WO_cT26Y
* @param l &a-:ZA@
* @param i 6)DYQ^4y
*/ c< \:lhl
private void insertSort(int[] data, int start, int len) { I_eYTy-a`1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b/ur!2yr
} Ku&0bXP
} 6C) G
} +h[$\_y
} 5H?`a7q N
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堆排序： ~f){`ZJc
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package org.rut.util.algorithm.support; HtS:'~DYo
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import org.rut.util.algorithm.SortUtil; ggX'`bK
9<-AukK m
/** tjO||]I
* @author treeroot .F}ZP0THnZ
* @since 2006-2-2 3Jk;+<
* @version 1.0 ,/JrQWgD
*/ xae}8E
public class HeapSort implements SortUtil.Sort{ RI cA)I.
zneK)C8&q3
/* (non-Javadoc) P1H`NOC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [nYwJ
*/ IXX^C}\,
public void sort(int[] data) { H}JH339
MaxHeap h=new MaxHeap(); Gl}=Q7
h.init(data); B||^sRMX
for(int i=0;i h.remove(); :S?'6lOc(
System.arraycopy(h.queue,1,data,0,data.length); y]M/oH
} E jBEZL|_
ZK_IK)g
private static class MaxHeap{ )SUT+x(DU
qFf'RgUtP
void init(int[] data){ A-.jv
this.queue=new int[data.length+1]; [4(TG<I
for(int i=0;i queue[++size]=data; v@"xEf1n[
fixUp(size); 3]<$;[Q
} 0(-'L\<>x
} Qh)@-r3
<@5#
private int size=0; jlzqa7
Q)HVh[4
private int[] queue; > NK?!!A_
3vmLftZE}
public int get() { $ShL^g@
return queue[1]; -\AB!#fh
} S1%{/w
0qZ{:}`3
public void remove() { t'0r4&\
SortUtil.swap(queue,1,size--); U}7$:hO"dX
fixDown(1); ma?569Z8~0
} I+8m1*
file://fixdown QTK\"
private void fixDown(int k) { >RE&>T^8
int j; <k}>eGn
while ((j = k << 1) <= size) { D OPOzh
if (j < size %26amp;%26amp; queue[j] j++; t`H^! b
if (queue[k]>queue[j]) file://不用交换 '_@=9 \<
break; 5K{(V^88F
SortUtil.swap(queue,j,k); kB"Sh_:m
k = j; az0( 54M
} !tHqF
} 18V*Cu
private void fixUp(int k) { esbxx##\
while (k > 1) { +JBhw4et;.
int j = k >> 1; *sB=Ys?
if (queue[j]>queue[k]) qV8;;&8r
break; eJ$?T7aUf
SortUtil.swap(queue,j,k); z15(8Y@2]
k = j; 8~\Fpz|Og
} qs 52)$
} Zdj~B1
`H^Nc\P#
} DQH _@-q
aztP`S$h
} 4D9lZa}
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SortUtil： Af ^6
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package org.rut.util.algorithm; W&BwBp]K
fx%'7/+
import org.rut.util.algorithm.support.BubbleSort; ^fXNeBj
import org.rut.util.algorithm.support.HeapSort; HSp*lHU
import org.rut.util.algorithm.support.ImprovedMergeSort; RE!MX>sOEq
import org.rut.util.algorithm.support.ImprovedQuickSort; H*EQ%BLW^,
import org.rut.util.algorithm.support.InsertSort; DTn=WGm)
import org.rut.util.algorithm.support.MergeSort; Y5cUOfYT
import org.rut.util.algorithm.support.QuickSort; 4 lJ@qhV
import org.rut.util.algorithm.support.SelectionSort; 7:{4'Wr@6|
import org.rut.util.algorithm.support.ShellSort; pRUN[[L
c{rX7+bN
/** zO9|s}J8q
* @author treeroot WO^smCk
* @since 2006-2-2 ./J.OU1
* @version 1.0 Y\sLwLLlG
*/ ~}z p}Pt
public class SortUtil { I?s)^'
public final static int INSERT = 1; k$k(g
public final static int BUBBLE = 2; qV9`
public final static int SELECTION = 3; <74q]C
public final static int SHELL = 4; =@gH$Q_1
public final static int QUICK = 5; L'"20=sf
public final static int IMPROVED_QUICK = 6; REnRpp$
public final static int MERGE = 7; ^X"G~#v=q
public final static int IMPROVED_MERGE = 8; dUOjPq97
public final static int HEAP = 9; Q3wD6!'&m
S)@R4{=e"V
public static void sort(int[] data) { JS}W4 N
sort(data, IMPROVED_QUICK); /M v\~vg$1
} u)R>ozER
private static String[] name={ 2frJSV?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )'DFDrY
}; </:f-J%U/
RyIr_:&-~
private static Sort[] impl=new Sort[]{ h_*=_2|}
new InsertSort(), V|#B=W
new BubbleSort(), @ g~kp
new SelectionSort(), b(;"p-^
new ShellSort(), $axaI$bE
new QuickSort(), zd>[uIOR
new ImprovedQuickSort(), ]A9Vh
new MergeSort(), .y+>-[j?B
new ImprovedMergeSort(), MvL%*("4b
new HeapSort() m\"M`o B
}; r7JILk
7ABHgw~?8r
public static String toString(int algorithm){ Ud`V"X
return name[algorithm-1]; :4]&R9J>o
} g^}X3NUn
*z` {$hc
public static void sort(int[] data, int algorithm) { h8u(lIRHQ
impl[algorithm-1].sort(data); <uu1e@P
} -NiFO
A{y3yH`#h
public static interface Sort { 3vQ?vS|2
public void sort(int[] data); g0cCw2S
} UyD=x(li
H,:Cg:E/^
public static void swap(int[] data, int i, int j) { b;9v.MZ4>g
int temp = data; 7{v0K"E{
data = data[j]; 08yTTt76t
data[j] = temp; R4E0avt
} .<rL2`C[c
} kOFEH!9&