[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; ;(C<gt,r}
} @*z"Hi>4
int i1=l; 'D\X$^J^
int i2=mid+1; ,s8/6n#
for(int cur=l;cur<=r;cur++){ 'ZbWr*bo
if(i1==mid+1) *HoRYCL
data[cur]=temp[i2++]; *.W3V;K
else if(i2>r) \VpEUU6^U
data[cur]=temp[i1++]; gAAC>{Wh
else if(temp[i1] data[cur]=temp[i1++]; jTa\I&s,A
else 4H{t6t@-:
data[cur]=temp[i2++]; 7^dr[.Q[*
} "*d6E}wG
} \^)i!@v
a?[[F{X9^
} Iz0$T.T
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改进后的归并排序: EBy7wU`S
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package org.rut.util.algorithm.support; {4J.
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import org.rut.util.algorithm.SortUtil; BA@E
56;u7
/** Oe5rRQ$O
* @author treeroot $d<NN2
* @since 2006-2-2 }3 xkA
* @version 1.0 h/EIFve
*/ X1#Ar)
public class ImprovedMergeSort implements SortUtil.Sort { s~M$Wo8
x^ `/&+m
private static final int THRESHOLD = 10; VYG@_fd!x
~?\U];l
/* q?!HzZ
* (non-Javadoc) JL M Xkcc
* =gVMt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {irc0gI
*/ 0'o[2,
public void sort(int[] data) { H^d?(Svh
int[] temp=new int[data.length]; l7-lXl"%q
mergeSort(data,temp,0,data.length-1); Ema[M5$R
} #/oH #/?
^4`aONydl
private void mergeSort(int[] data, int[] temp, int l, int r) { 0qS/>u*
int i, j, k; Wga2).j6
int mid = (l + r) / 2; Qs1CK;+zU
if (l == r) p:08q B|uQ
return; <K CI@
if ((mid - l) >= THRESHOLD) .W{CJh
mergeSort(data, temp, l, mid); QAkK5,`vV.
else |=0vgwd"S
insertSort(data, l, mid - l + 1); 78l);/E{v
if ((r - mid) > THRESHOLD) yCQvo(V[F
mergeSort(data, temp, mid + 1, r); OAXA<
else IxbQ6
insertSort(data, mid + 1, r - mid); o GuAF q
$;^|]/-
for (i = l; i <= mid; i++) { $Cz2b/O
temp = data; s#^0[ Rt
} tVG;A&\,6
for (j = 1; j <= r - mid; j++) { i-|N6J
temp[r - j + 1] = data[j + mid]; 7yE\,
} [* <x)
int a = temp[l]; S~/2Bw!2
int b = temp[r]; :E9pdx+
for (i = l, j = r, k = l; k <= r; k++) { /EjXyrn2
if (a < b) { )Rn\6ka
data[k] = temp[i++]; gX"-3w
a = temp; \c2x udU
} else { cZVx4y%kz
data[k] = temp[j--]; O#D{:H_dD>
b = temp[j]; '8 .JnCg
} 2Mx\D
} riW9l6s'
} J _rrc;F
R+HX'W
/** }H ~-oYMu
* @param data j|KDgI<0
* @param l -,yp?<
* @param i ]Thke 4
*/ t4oD> =,92
private void insertSort(int[] data, int start, int len) { <tvLKx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (.UU40:t
} n.g-%4\q
} 8:0/Cj
} h*R@ d
} r^5%0_F]
8i',~[
堆排序： p8'$@:M\
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package org.rut.util.algorithm.support; lie,A
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import org.rut.util.algorithm.SortUtil; ,sitOy}ks
+zh\W9
/** UVux[qX<
* @author treeroot 4EM+Ye
* @since 2006-2-2 xt}.0dC!/%
* @version 1.0 YrnC'o`
*/ dFBFXy
public class HeapSort implements SortUtil.Sort{ 7<su8*?
M P8Sd1_=
/* (non-Javadoc) |$\K/]q-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uH*6@aYPo
*/ @_kF&~
public void sort(int[] data) { N>(w+h+
MaxHeap h=new MaxHeap(); JU17]gQ
h.init(data); j&X&&=
for(int i=0;i h.remove(); jJIP $
System.arraycopy(h.queue,1,data,0,data.length); qb[hKp5K6
} +ydd"`
a,Pw2Gcid
private static class MaxHeap{ ;qaPK2a8
pl).U#7`
void init(int[] data){ wH?)ZL
this.queue=new int[data.length+1]; x/?ET1iGt
for(int i=0;i queue[++size]=data; kqCsEtm]
fixUp(size); TVcA%]y{;
} :|n[zjK/S
} eyKxnBz
'4uu@?!dVk
private int size=0; `,6|6.8#
QdgJNT<=H,
private int[] queue; !64Tx
Tc(=J7*r&
public int get() { @ZU$W9g
return queue[1]; 6C2~0b
} 5TJd9:\Af
d1/WUKmbZ
public void remove() { @$jV"Y
SortUtil.swap(queue,1,size--); cTGd<
fixDown(1); |OJWQU![by
} 7 0?iZIK _
file://fixdown WnG2\(U
private void fixDown(int k) { qm$(_]R~`
int j; $A?9U}V#^
while ((j = k << 1) <= size) { ,jRAVt+{N
if (j < size %26amp;%26amp; queue[j] j++; nsI+04[F
if (queue[k]>queue[j]) file://不用交换 Mw0>p5+ cy
break; DURWE,W>
SortUtil.swap(queue,j,k); 8GP17j
k = j; $~1vXe
} ketp9}u
} bVzi^R"
private void fixUp(int k) { }O*`I(
while (k > 1) { dJgLS^1E
int j = k >> 1; ;~<To9O
if (queue[j]>queue[k]) KFbB}oId
break; 3'.@aMA@
SortUtil.swap(queue,j,k); >g<YH'U{
k = j; *:yG)J 3F
} k^Qf |
} N#l2wT
?)1Y|W'Rv
} xoo,}EY
K\2{SjL:B
} I Id4w~|
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SortUtil： 5Rl\& G\
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package org.rut.util.algorithm; aB6xRn9
Y]SF0:v!n
import org.rut.util.algorithm.support.BubbleSort; J>
import org.rut.util.algorithm.support.HeapSort; esJ7#Gxt
import org.rut.util.algorithm.support.ImprovedMergeSort; 1*=ev,Z
import org.rut.util.algorithm.support.ImprovedQuickSort; tq59w
import org.rut.util.algorithm.support.InsertSort; sA,bR|
import org.rut.util.algorithm.support.MergeSort; bvtpqI QZ
import org.rut.util.algorithm.support.QuickSort; _H]^7`;
import org.rut.util.algorithm.support.SelectionSort; ]"_c-=
import org.rut.util.algorithm.support.ShellSort; P)K$+oo
]QaKXg)3q
/** `sKyvPtG
* @author treeroot e>z"{ u(F0
* @since 2006-2-2 MOD&3>NI
* @version 1.0 r""rJzFz'
*/ #`u}#(
public class SortUtil { gko=5|c,@
public final static int INSERT = 1; $!_ X9)e
public final static int BUBBLE = 2; 6&x\!+]F8
public final static int SELECTION = 3; '<o3x$6 *
public final static int SHELL = 4; 4SI~y;c)
public final static int QUICK = 5; W,@F!8
public final static int IMPROVED_QUICK = 6; V#oz~GMB
public final static int MERGE = 7; x{:U$[_
public final static int IMPROVED_MERGE = 8; wGti|7Tu*
public final static int HEAP = 9; vntJe^IaFd
&DMC\R*j
public static void sort(int[] data) { S=k!8]/d|
sort(data, IMPROVED_QUICK); Y$L` G
} +fk*c[FG
private static String[] name={ 7z$Z=cs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2{h2]F
}; Hi09?AX
QH-CZ6M
private static Sort[] impl=new Sort[]{ eJo" Z
new InsertSort(), {<ShUN
new BubbleSort(), $YX{gk>
new SelectionSort(), 6X@z(EEL
new ShellSort(), 'u<e<hU
new QuickSort(), G^Gs/- f
new ImprovedQuickSort(), U"7o;q
new MergeSort(), zgGysjV
new ImprovedMergeSort(), w80X~
new HeapSort() =v<w29P(g
}; |<c9ZS+
,7s>#b'
public static String toString(int algorithm){ w<H Xe
return name[algorithm-1]; Leb Kzqe
} ATkd#k%S
nG'Yo8I^5
public static void sort(int[] data, int algorithm) { B!Wp=9)G
impl[algorithm-1].sort(data); X)!XR/?
} r^ Dm|^f#
CC=I|/mBM
public static interface Sort { `&A`&-nc=
public void sort(int[] data); ,w~3K%B4
} 1x_EAHZ>7
U:*rlA@_.
public static void swap(int[] data, int i, int j) { :Vxt2@p{
int temp = data; xq;>||B
data = data[j]; >2s6Y
data[j] = temp; :=B.)]F.)
} E.*hY+kGZ
} vt5w(}v(