[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; N;Z`%&
} pK6e/eC
int i1=l; /B,:<&_-
int i2=mid+1; 2ec$xms
for(int cur=l;cur<=r;cur++){ ySwYV
if(i1==mid+1) >:F,-cx<
data[cur]=temp[i2++]; XOysgX0g
else if(i2>r) 49+ >f
data[cur]=temp[i1++]; $=PWT-GIR
else if(temp[i1] data[cur]=temp[i1++]; p~Hvl3SxR
else k]SAJ~bS|
data[cur]=temp[i2++]; Dd!Sr8L[
} zU f>db
} 5:Yck<
-ajM5S=d*
} 5l41Q
E /fw?7eQ
改进后的归并排序: .O5LI35,
] vC=.&]
package org.rut.util.algorithm.support; ="uKWt6n'
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import org.rut.util.algorithm.SortUtil; _4P;+Y
s<A*[
/** ?mH@`c,fM
* @author treeroot )n\*ht7
* @since 2006-2-2 cPpu
* @version 1.0 nK+lE0
*/ r1i$D
public class ImprovedMergeSort implements SortUtil.Sort { [096CK
Gs[Vu@*
private static final int THRESHOLD = 10; 6(>3P
`S"W8_m
/* 8AT;8I<K
* (non-Javadoc) puFXPw.3
* M'yO+bu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Ut6;
*/ mfXD1]<.
public void sort(int[] data) { TE3*ktB{N
int[] temp=new int[data.length]; 4\p$4Hs}
mergeSort(data,temp,0,data.length-1); :3JCvrq
} Vy]A,Rn7
9160L qY
private void mergeSort(int[] data, int[] temp, int l, int r) { K!GUv{fp
int i, j, k; &k1/Z*/
int mid = (l + r) / 2; F[5S(7M 7
if (l == r) +H7y/#e+3
return; K} +S+ *_
if ((mid - l) >= THRESHOLD) Vl<`|C>
mergeSort(data, temp, l, mid); vCj4;P g
else z1F9$^
insertSort(data, l, mid - l + 1); =M/qV
if ((r - mid) > THRESHOLD) &GuF\wJ{7
mergeSort(data, temp, mid + 1, r); C1 W>/?XC
else \I;cZ>{u"}
insertSort(data, mid + 1, r - mid); @|DmE!)
/mc*Hc8R8
for (i = l; i <= mid; i++) { g^jJ8k,7(
temp = data; rsWQHHkO
} j~epbl)pC
for (j = 1; j <= r - mid; j++) { %*6RzJO6
temp[r - j + 1] = data[j + mid]; 6#E7!-u(-
} {gsW(T>)
int a = temp[l]; zhX;6= X2
int b = temp[r]; TFO74^
for (i = l, j = r, k = l; k <= r; k++) { (v!mR+\x
if (a < b) { 4Q;<Q"
data[k] = temp[i++]; mH)OB?+lq
a = temp; okz]Qc>G
} else { }t\ 10nQ
data[k] = temp[j--]; "J& (:(:
b = temp[j]; PcB{=L
} N+NK`
} .3@Ng
} _lP4}9p
\#++s&06
/** uN9e:;
* @param data uJY.5w
* @param l !Av1Leb9$
* @param i KY g3U
*/ OF8WDo`
private void insertSort(int[] data, int start, int len) { G?<pBMy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^!}F%
} !lhFKb;
} Rboof`pVt
} Y%g "Y
} <(YF5Xm6$h
\45(#H<$
堆排序： %}h`+L
b66R}=P l
package org.rut.util.algorithm.support; 0wFh%/:
A*F9\mjI5
import org.rut.util.algorithm.SortUtil; j=W@P-
WYLX?x
/** .E$q&7@/j
* @author treeroot ]G*$W+G]
* @since 2006-2-2 uoCGSXsi
* @version 1.0 +9zA^0
*/ g\&2s,
public class HeapSort implements SortUtil.Sort{ BFh$.+D
N@()F&e
/* (non-Javadoc) TEWAZVE*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hgO?+x
*/ 6V2j*J
public void sort(int[] data) { kOipH |.x
MaxHeap h=new MaxHeap(); t77'fm
h.init(data); tpo>1|
for(int i=0;i h.remove(); h<% U["
System.arraycopy(h.queue,1,data,0,data.length); F;kvH
} RZh}:
a#y{pT2 b
private static class MaxHeap{ XWtiwf'K
jDTUXwx7V
void init(int[] data){ 2ykCtRe
this.queue=new int[data.length+1]; GV8)Kor%
for(int i=0;i queue[++size]=data; _|<BF
fixUp(size); )GJP_*Ab
} $.:3$et@/
} J3B.-XJ+n
Uh}X<d/V
private int size=0; eYEc^nC,c)
%F J#uQXZ
private int[] queue; Pp*}R2
zvr\36
public int get() { KlUqoJ;"
return queue[1]; "2;N2=~7
} f#P_xn&et
]l[2hy= cV
public void remove() { L~eAQR
SortUtil.swap(queue,1,size--); LgHJo-+>
fixDown(1); 2EfflZL3
} :woa&(wN;1
file://fixdown ;|TT(P:d
private void fixDown(int k) { (WE,dY+.
int j; *#2Rvt*Ox
while ((j = k << 1) <= size) { ><Uk*mwL
if (j < size %26amp;%26amp; queue[j] j++; "H1:0p
if (queue[k]>queue[j]) file://不用交换 [6RfS
break; <TxC!{<
SortUtil.swap(queue,j,k); /6U 4S>'(
k = j; J#7y< s
} K"l0w**Og#
} >}SRSqJu
private void fixUp(int k) { A*'V+(
while (k > 1) { L'9N9CR{i
int j = k >> 1; c_1/W{
if (queue[j]>queue[k]) T~s}Nx#
break; J&6:d
SortUtil.swap(queue,j,k); 5f{|"LG&
k = j; CLN+I'uX0
} AyTx'u
} Z@J.1SaB
onl>54M^
} |Td5l?
%j{.0H
} .Z%G@X*
dWR1cvB(wY
SortUtil： Q%5F ]`VN
sR*Nq5F#9
package org.rut.util.algorithm; S()Za@ [a$
vv/J 5#^,\
import org.rut.util.algorithm.support.BubbleSort; , Oli
import org.rut.util.algorithm.support.HeapSort; `="v>qN2\
import org.rut.util.algorithm.support.ImprovedMergeSort; ^?"^Pmw
import org.rut.util.algorithm.support.ImprovedQuickSort; (wA?;]q(
import org.rut.util.algorithm.support.InsertSort; ("Dv>&w9
import org.rut.util.algorithm.support.MergeSort; ]d'^Xs
import org.rut.util.algorithm.support.QuickSort; !R:y'Y%j
import org.rut.util.algorithm.support.SelectionSort; @]'SeiNp
import org.rut.util.algorithm.support.ShellSort; O9]\Q@M.
rsF:4G"%
/** JSW&rn
* @author treeroot Eark)
* @since 2006-2-2 #*,sa
* @version 1.0 zvf3b!}
*/ .JAcPyK^
public class SortUtil { O&$0&dhc
public final static int INSERT = 1; GLh]G(
public final static int BUBBLE = 2; X?dfcS*!n
public final static int SELECTION = 3; T1NH eH>
public final static int SHELL = 4; QN G&
public final static int QUICK = 5; p4mY0Y]mP
public final static int IMPROVED_QUICK = 6; >XE`h9
public final static int MERGE = 7; DO^y;y>
public final static int IMPROVED_MERGE = 8; )HVcG0H1
public final static int HEAP = 9; {ZqQ!!b
Hed$ytMaGz
public static void sort(int[] data) { arj$dAW
sort(data, IMPROVED_QUICK); gdi`x|0
} "ahvNx;x
private static String[] name={ uec|S\~M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uva\0q
}; #IX&9 aFB}
,")F[%v
private static Sort[] impl=new Sort[]{ IZ~.{UQ
new InsertSort(), >saI+u'o
new BubbleSort(), POGw`:)A
new SelectionSort(), `clB43i
new ShellSort(), 3k{ @.V?]
new QuickSort(), r/AHJU3&eY
new ImprovedQuickSort(), hKksVi
new MergeSort(), 2R`u[
new ImprovedMergeSort(), -P#nT 2
new HeapSort() \dV Too
}; kaFnw(xa
v*r9j8
public static String toString(int algorithm){ 0Hcbkep9D
return name[algorithm-1]; f z%tA39m
} [hU=mS8=^
SDc" 4g`
public static void sort(int[] data, int algorithm) { M 9"-WIG@h
impl[algorithm-1].sort(data); re uYTH
} ;0j*>fb\q7
Ae3,^
public static interface Sort { }m_t$aaUc1
public void sort(int[] data); Y/P]5: =h
} M=%!IT
:qnokrGzB
public static void swap(int[] data, int i, int j) { 'v`_Ii|-
int temp = data; vlQ0gsXK
data = data[j]; Zh,]J `
data[j] = temp; _,Q[2gQ5N
} d_T<5Hin
} k4R4YI"jV