[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; H}q$6WE
} <;uM/vSi
int i1=l; ?b"'w
int i2=mid+1; A-J#$B
for(int cur=l;cur<=r;cur++){ OJhMM-
if(i1==mid+1) )."dqq^ q
data[cur]=temp[i2++]; ~)zxIO!
else if(i2>r) r8!pk~R5]
data[cur]=temp[i1++]; hc|#JS2H@y
else if(temp[i1] data[cur]=temp[i1++]; _g-0"a{-
else WQ9Q:F2
data[cur]=temp[i2++]; gVy`||z
} sZ7~AJ
} owI:Qs_/4
E}THG=6
} z@ `u$D$n
hm k ~
改进后的归并排序: [_}8Vv&6
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package org.rut.util.algorithm.support; /a9CqK
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import org.rut.util.algorithm.SortUtil; %|1s9?h7\
9XhH*tBn7(
/** M%RH4%NZ0
* @author treeroot &pR 8sySu
* @since 2006-2-2 TAqX f_
* @version 1.0 l?YO!$
*/ >YsM'.EFD
public class ImprovedMergeSort implements SortUtil.Sort { 7\ZSXQy1W
2m} bddS
private static final int THRESHOLD = 10; `M(st%@n
!w@i,zqu
/* h%NM%;"H/
* (non-Javadoc) "@|rU4Y
* t;-F]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X[f)0w%
*/ mahNQ5W*)
public void sort(int[] data) { =+I-9=
int[] temp=new int[data.length]; <M}O&?N 8x
mergeSort(data,temp,0,data.length-1); g/\cN(X
} !H<%X~|,
qQ6@43TC
private void mergeSort(int[] data, int[] temp, int l, int r) { -yTIv*y
int i, j, k; ,oPxt
int mid = (l + r) / 2; ledr[)
if (l == r) |`s:&<W+kp
return; N R4\TU
if ((mid - l) >= THRESHOLD) Aon.Y Z
mergeSort(data, temp, l, mid); CS5[E-%}T=
else -WR<tkK
insertSort(data, l, mid - l + 1); _OS,zZ0
if ((r - mid) > THRESHOLD) [7g-M/jvY
mergeSort(data, temp, mid + 1, r); FC||6vJth
else N9y+Psh
insertSort(data, mid + 1, r - mid); zSu,S4m_;
wXKt)3dmu
for (i = l; i <= mid; i++) { TJ_6:;4,|_
temp = data; Zb|a\z8?
} Mn<s9ITS-
for (j = 1; j <= r - mid; j++) { @`8a3sL)
temp[r - j + 1] = data[j + mid]; ?Zk;NL9
} @*- 6DG-f
int a = temp[l]; Li$2 Gpc/
int b = temp[r]; 0&b;!N!vJ
for (i = l, j = r, k = l; k <= r; k++) { N8x.D-=gG
if (a < b) { 25j\p{*
data[k] = temp[i++]; lC,~_Yb
a = temp; !IB}&m
} else { +Z86Qz_
data[k] = temp[j--]; b`,Sd.2=('
b = temp[j]; ' I!/I
} t7sEY
} [Fv,`*/sm
} 8.7q -<Q
!^v~hD$_q
/** z|Yt|W
* @param data Df:/r%
* @param l i1A<0W|
* @param i v-^tj}jA
*/ |.&GmP
private void insertSort(int[] data, int start, int len) { rKd|s7l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zjSl;ru
} (/!@ -]1
} ~C>Q+tR8
} _-^mxC|M
} [TFp2B~)#
!c-MC|
堆排序： -T-yt2h(
m/(/!MVy
package org.rut.util.algorithm.support; 7Cbr'!E\_V
ccp9nXv
import org.rut.util.algorithm.SortUtil; $J,$_O6
J&}1=s
/** ,8d&uR}x
* @author treeroot 64`l?F
* @since 2006-2-2 |"9vq<`
* @version 1.0 i~R+g3oi
*/ p~""1m01,D
public class HeapSort implements SortUtil.Sort{ Sm?|,C3V
qPWf=s7!
/* (non-Javadoc) :}/\hz ,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LP'q$iB!
*/ ^N 4Y*NtV7
public void sort(int[] data) { a1u4v/Qu9
MaxHeap h=new MaxHeap(); mH5>50H;
h.init(data); Ggsts
for(int i=0;i h.remove(); Wg,@S*x(
System.arraycopy(h.queue,1,data,0,data.length); d6-q"
} Q2* 8c$
pSIXv%1J
private static class MaxHeap{ n<<arO"cv
?~#[cx
void init(int[] data){ p9mGiK4!
this.queue=new int[data.length+1]; Q)qJ6-R|HD
for(int i=0;i queue[++size]=data; nn$^iw`
fixUp(size); EM!S ;i
} s*Z yr%R
} O, :|
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private int size=0; Gm=&[?}
ko'V8r`V
private int[] queue; !M9mX%UQ
QZa^Cng~
public int get() { aI`d
return queue[1]; Yl?s^]SFU
} :,j^ei
b9 li
public void remove() { <w8H[y"c
SortUtil.swap(queue,1,size--); ImH9 F\
fixDown(1); 0Q8iX)
} g}K/ba'
file://fixdown 2Ur&_c6P
private void fixDown(int k) { Aw4)=-LKO
int j; x_?K6[G&}
while ((j = k << 1) <= size) { ~i'!;'-_}
if (j < size %26amp;%26amp; queue[j] j++; b&1hj[`)
if (queue[k]>queue[j]) file://不用交换 U2vb&Qu/
break; fb^R3wd$ff
SortUtil.swap(queue,j,k); nA.U'=`
k = j; 4e; le&
} ^^tTA^
} .pm%qEh
private void fixUp(int k) { OT6Te&
while (k > 1) { 9.( [,J
int j = k >> 1; zcH"Kh&
if (queue[j]>queue[k]) 0b8=94a{>
break; 8oRq3"
SortUtil.swap(queue,j,k); Pc5C*{C
k = j; |E||e10wR
} uGW#z_{(n
} B>\q!dX3
0oBAJP
} 0]]OE+9<c
ba ,n/yH
} o_kZ
|Zp') JiS
SortUtil： |UQ[pas
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package org.rut.util.algorithm; EGFPv'De
R$`&g@P="
import org.rut.util.algorithm.support.BubbleSort; o54=^@>O<j
import org.rut.util.algorithm.support.HeapSort; xcQ^y}JN
import org.rut.util.algorithm.support.ImprovedMergeSort; D(dV{^} 9
import org.rut.util.algorithm.support.ImprovedQuickSort; ,pf\g[tz
import org.rut.util.algorithm.support.InsertSort; h<PS<
import org.rut.util.algorithm.support.MergeSort; 85] 'I%gT
import org.rut.util.algorithm.support.QuickSort; h4Arg~Or
import org.rut.util.algorithm.support.SelectionSort; lU&2K$`
import org.rut.util.algorithm.support.ShellSort; 9(vp`Z8B4
?6x&A t
/** yGC HWP
* @author treeroot }NdLd!
* @since 2006-2-2 |o(te
* @version 1.0 f.oY:3h:
*/ xUa9>=JU{
public class SortUtil { +2Aggv>*
public final static int INSERT = 1; ,kYX|8SO
public final static int BUBBLE = 2; bu\(KR$s
public final static int SELECTION = 3; EqIs&){
public final static int SHELL = 4; O~x{p,s U
public final static int QUICK = 5; ;<E?NBV^
public final static int IMPROVED_QUICK = 6; i??+5o@uTF
public final static int MERGE = 7; HxLuJ
public final static int IMPROVED_MERGE = 8; c*"P+
public final static int HEAP = 9; ,lFzL3'_0x
X9^q-3&60
public static void sort(int[] data) { bmKvvq
sort(data, IMPROVED_QUICK); k][{4~z
} 0D `9
private static String[] name={ 4Sdj#w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pjSM7PhQ
}; ?G]yU
#,})N*7
private static Sort[] impl=new Sort[]{ rfSEL 57'
new InsertSort(), 29|nt1Z
new BubbleSort(), %P#| }
new SelectionSort(), a8k`Wog
new ShellSort(), {cdrMP@""
new QuickSort(), K!E\v4
new ImprovedQuickSort(), p_apVm\t_
new MergeSort(), f6Y-ss;'
new ImprovedMergeSort(), +x4*T
new HeapSort() 4ISIg\:c*
}; pXh`o20I
I!K-* AB
public static String toString(int algorithm){ o4z|XhLr
return name[algorithm-1]; T`<Tj?:^&
} "15frr?
92b}N|u
public static void sort(int[] data, int algorithm) { JV/:QV
impl[algorithm-1].sort(data); Jiru~Vo+
} b#t5Dve
XQ}7.u!
public static interface Sort { ozHL'H
public void sort(int[] data); wp4 .~E
} "tpD ->
;\j'~AyCn
public static void swap(int[] data, int i, int j) { )QnsRW{D"
int temp = data; g0;6}n
data = data[j]; j^f54Ky.
data[j] = temp; Gs04)KJm<
} -ntQqHs
} /~+Fzz