[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; @G#`uoD
} /QL<>g
int i1=l; #p;<X|Hc}8
int i2=mid+1; %r6_['T
for(int cur=l;cur<=r;cur++){ Xo(W\Pes
if(i1==mid+1) $l.8
data[cur]=temp[i2++]; }Gb^%1%M
else if(i2>r) ,1|=_M31
data[cur]=temp[i1++]; wp8-(E^
else if(temp[i1] data[cur]=temp[i1++]; X`v6gv5qj
else q4@+Pi)
data[cur]=temp[i2++]; \QSD*
} |@b|Q,
} 2>x[_
H.n|zGQTB
} >d .|I&
S=< ]u
改进后的归并排序: k-*k'S_
*2pE39
package org.rut.util.algorithm.support; JKp@fQT *
:+^`VLIf
import org.rut.util.algorithm.SortUtil; /YwwG;1
"lA$;\&
/** <;+QK=f
* @author treeroot )"P.n-aF
* @since 2006-2-2 _6nza)OFH
* @version 1.0 h9c7P@29
*/ m^0*k|9+G
public class ImprovedMergeSort implements SortUtil.Sort { [A!=Hv_$
'@hnqcqXq
private static final int THRESHOLD = 10; 3e;K5qSeo/
8BS$6Pa
/* \q-["W34
* (non-Javadoc) |SJ%Myy
* 2j>C4Ck
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lg (>n&
*/ ^=cXL
public void sort(int[] data) { /oM&29 jy
int[] temp=new int[data.length]; @M }`nKXM
mergeSort(data,temp,0,data.length-1); G in
} [.G~5%974
<&M5#:u
private void mergeSort(int[] data, int[] temp, int l, int r) { eLN(NSPoS
int i, j, k; ,n5 [Y)
int mid = (l + r) / 2; %%O_:@9x,
if (l == r) !G~\9
return; ?0E-Lac=
if ((mid - l) >= THRESHOLD) =)6|lz^
mergeSort(data, temp, l, mid); |TBKsx8
else Q},uM_"+
insertSort(data, l, mid - l + 1); s.}:!fBk
if ((r - mid) > THRESHOLD) );F /P0P
mergeSort(data, temp, mid + 1, r); M^A;tPw
else ;}4e+`fF|
insertSort(data, mid + 1, r - mid); 0ipYXbC
;{>-K8=>$
for (i = l; i <= mid; i++) { !3at(+4
temp = data; z1~U#
} >\!>CuU
for (j = 1; j <= r - mid; j++) { kObgoMT<[
temp[r - j + 1] = data[j + mid]; +Mh9Jf
} W&k2z,|
int a = temp[l]; pK2n'4 C
int b = temp[r]; ?K?v64[
for (i = l, j = r, k = l; k <= r; k++) { 3D7phq>.q
if (a < b) { J 9k~cz
data[k] = temp[i++]; ;6zp,t0
a = temp; (V~PYf%
} else { </d&bS
data[k] = temp[j--]; !;C *Wsp}
b = temp[j]; W>7o ec
} QVrMrm+vRv
} ze%)fZI0f
} _\xd]~ELj
QI2T G,
/** GwVSRI:[N
* @param data vo DTU]pf
* @param l =i)k@w_(x
* @param i n\y%5J+
*/ PizPsJ|&
private void insertSort(int[] data, int start, int len) { vN4g#,<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nK9A=H'Hc
} X[c8P7
} \TBY)_[ {
} ~\m|pxcj
} G(~"Zt}?
ztS'Dp}q<
堆排序： G?6[K&w
*m sW4|=^2
package org.rut.util.algorithm.support; ~FV Z0%+,
aTy&"
import org.rut.util.algorithm.SortUtil; _,4f z(
l0$ +)FKd
/** e$^O_e
* @author treeroot ;2;Kq)j_=
* @since 2006-2-2 OC]_b36v
* @version 1.0 UI 7JMeV
*/ DjjG?(1
public class HeapSort implements SortUtil.Sort{ [sY>ac
%h%^i
/* (non-Javadoc) WVf>>E^1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xCV3HnZ
*/ &?<o692
public void sort(int[] data) { a[GlqaQy+-
MaxHeap h=new MaxHeap(); YDyi6x,
h.init(data); %!HmtpS
for(int i=0;i h.remove(); /*lSpsBn
System.arraycopy(h.queue,1,data,0,data.length); t$Z#zxX
} toEmIa~o6
Bk1Q.Un
private static class MaxHeap{ jn#
f,Sybf/uHh
void init(int[] data){ '7{0k{
this.queue=new int[data.length+1]; }IGr%C(3%
for(int i=0;i queue[++size]=data; zrt8ze=Su
fixUp(size); 7b,u|F
} #IP<4"Hf
} :r[`bqC;\*
Ov)rsi
private int size=0; H0s,tTK8
Oav^BhUO
private int[] queue; ge[+/$(1
t\]CdH`+
public int get() { XH0R:+s
return queue[1]; 2Fce| Tn
} >b0e"eGt
kG+CT
public void remove() { M#d_kDMw
SortUtil.swap(queue,1,size--); ;#!`cgAh
fixDown(1); G)?O!(_
} 1k\1U
file://fixdown L;'+O u
private void fixDown(int k) { ;{Y|n_
int j; fdCsn:
while ((j = k << 1) <= size) { M,PZ|=V6a
if (j < size %26amp;%26amp; queue[j] j++; Xt/muV
if (queue[k]>queue[j]) file://不用交换 _'dsEF
break; 3Cwqy#X#8
SortUtil.swap(queue,j,k); _#e='~;
k = j; 1z$;>+g<
} Y'Jb@l`$-
} d;(L@9HHD
private void fixUp(int k) { ^[8e|,U
while (k > 1) { ~y^#?;
int j = k >> 1; s%J|r{F6
if (queue[j]>queue[k]) vu YH+
break; BJk\p.BVN
SortUtil.swap(queue,j,k); '\dFhYs{*
k = j; dLal15Pb
} !/['wv@
} H4 & d,8:m
ZsUxO%jP
} ^`\c;!)F<
vBQ5-00YY=
} M:nXn7)+
(ZjIwA9>
SortUtil： bUp%87<*X
o'%F*>#v
package org.rut.util.algorithm; <0R7uH
or~o'
import org.rut.util.algorithm.support.BubbleSort; ,ibI@8;#~'
import org.rut.util.algorithm.support.HeapSort; ]ODC+q1
import org.rut.util.algorithm.support.ImprovedMergeSort; 5}~*,_J2Z
import org.rut.util.algorithm.support.ImprovedQuickSort; }vxb, [#
import org.rut.util.algorithm.support.InsertSort; q[1H=+
import org.rut.util.algorithm.support.MergeSort; _$wWKJy9
import org.rut.util.algorithm.support.QuickSort; o~gduNG#
import org.rut.util.algorithm.support.SelectionSort; * C~
import org.rut.util.algorithm.support.ShellSort; .?_wcp=
z>&Py(
/** )Bl% {C
* @author treeroot X!CLOHVAa
* @since 2006-2-2 zY\v|l<T
* @version 1.0 X`:(-3T
*/ }`IN5NdYp
public class SortUtil { L1Fn;nR
public final static int INSERT = 1; &EmxSYL>
public final static int BUBBLE = 2; -deY,%
public final static int SELECTION = 3; _w^p~To^
public final static int SHELL = 4; o]MQ)\r
public final static int QUICK = 5; 5gGYG]*l
public final static int IMPROVED_QUICK = 6; t_3)}
public final static int MERGE = 7; :{LVS nG
public final static int IMPROVED_MERGE = 8; EFf<|v
public final static int HEAP = 9; ZGzrh`j{-
gUL`)t\}*
public static void sort(int[] data) { 8:$kFy\A'
sort(data, IMPROVED_QUICK); !o:RIwS3
} OWB^24Z&3
private static String[] name={ X||oiqbY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h}z^NX
}; 1<<`T%&
i{T0[\4
private static Sort[] impl=new Sort[]{ y$*Tbzp
new InsertSort(), -G;4['p
new BubbleSort(), !F;W#Gc
new SelectionSort(), ;{q7rsE
new ShellSort(), A7+eWg{
new QuickSort(), 5p94b*l
new ImprovedQuickSort(), 6N~~:Gt
new MergeSort(), z6|P]u
new ImprovedMergeSort(), M)I&^mm39
new HeapSort() eAu3,qoM
}; k2<VUeW5
*FK!^Y
public static String toString(int algorithm){ (IIOKx_
return name[algorithm-1]; "]*0)h_
} SG8|xoL
B:qZh$YN
public static void sort(int[] data, int algorithm) { I#Iu:,OT
impl[algorithm-1].sort(data); T9RR. ng
} qK.8^{b
2ztP'
public static interface Sort { GLnj& Ve
public void sort(int[] data); 2Ev~[Hb.
} 22}J.'Zb
Cj_cu
public static void swap(int[] data, int i, int j) { PM7*@~.
int temp = data; #kA/,qyM
data = data[j]; E:&=A 4%
data[j] = temp; Z7K;~*
} Ga.a"\F.V
} ,hT t]w