[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; 6q]`??g.
} XOi[[G}
int i1=l; *UlL\
int i2=mid+1; OP}8u"\Z
for(int cur=l;cur<=r;cur++){ e:H9!
if(i1==mid+1) 875BD U
data[cur]=temp[i2++]; &$ /}HND
else if(i2>r) \r+8}8
data[cur]=temp[i1++]; 'ffOFIz|=I
else if(temp[i1] data[cur]=temp[i1++]; fW'U7&O
else ;\gsd'i
data[cur]=temp[i2++]; l-mf~{
} m;]glAtt
} :$"L;"
&QQ8ut,;
} u/2!v(
YN@4.&RP
改进后的归并排序: CN"hx-f
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package org.rut.util.algorithm.support; &@MiR8
/Xds+V^Z
import org.rut.util.algorithm.SortUtil; '!6Py1i
@Ja8~5:
/** )KLsa`RV:
* @author treeroot &4ScwK:
* @since 2006-2-2 01nbR+e
* @version 1.0 oT\u^WU
*/ r6Hdp
public class ImprovedMergeSort implements SortUtil.Sort { !awfxH0
9O+><x[i
private static final int THRESHOLD = 10; x1}7c9nK
E\(dyq/
/* &l=%*`On
* (non-Javadoc) 1.Ximom
* =nYd|Ok
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KnC;j-j
*/ Y70[Nz
public void sort(int[] data) { KKd Sh1
int[] temp=new int[data.length]; ;:a>#{N
mergeSort(data,temp,0,data.length-1); {1Z`'.FU
} Dg$Z5`%k8
Z. ))=w6G
private void mergeSort(int[] data, int[] temp, int l, int r) { GIt~"X
int i, j, k; o 26R]
int mid = (l + r) / 2; L*Mt/
if (l == r) +h}>UK\
return; ]{r*Z6bs
if ((mid - l) >= THRESHOLD) s:y~vd(Vi
mergeSort(data, temp, l, mid); K 9ytot
else ?v-( :OF
insertSort(data, l, mid - l + 1); p9;Oe,Il
if ((r - mid) > THRESHOLD) Tl^9!>\Q
mergeSort(data, temp, mid + 1, r); F_9eju^|
else FC:Z9{2!
insertSort(data, mid + 1, r - mid); )T1U!n?^x
lLO|,
for (i = l; i <= mid; i++) { .{` :
temp = data; d%:B,bck
} #,0PLU3%
for (j = 1; j <= r - mid; j++) { u%J04vG"D
temp[r - j + 1] = data[j + mid]; 8E:8iNbF
} U~j:b{
int a = temp[l]; CbmT aEaP
int b = temp[r]; mXd,{b'
for (i = l, j = r, k = l; k <= r; k++) { gOpi>
if (a < b) { /;7\HZ$@/
data[k] = temp[i++]; P|> fO'
a = temp; eI8rnp(Ia
} else { nRYHp7`
data[k] = temp[j--]; R?)M#^"W
b = temp[j]; H ?Vo#/
} g.wp }fz
} d"K~+<V}
} s}8(__|
k[9~Er+
/** ^I=W<
* @param data xbbQ)sH&m
* @param l \LYB% K}
* @param i [{]/9E/&
*/ J!O{.v
private void insertSort(int[] data, int start, int len) { Gwyjie9t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PtH>I,/
} ETt7?,x@
} BE`{? -G
} %gK@R3p
} }I3 ZNd
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堆排序： d']CBoK
&J>XKO nl
package org.rut.util.algorithm.support; 5)tDgm
I4[sf
import org.rut.util.algorithm.SortUtil; 5<Ly^Na:
e"^ /xF
/** :Ma=P\J W
* @author treeroot ZGILV
* @since 2006-2-2 9%+Nzo(Fd
* @version 1.0 Y^Of
*/ gLm ]*
public class HeapSort implements SortUtil.Sort{ d@sAB1:
pr\wI?:k
/* (non-Javadoc) 7D5[ L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Alo;kt@x
*/ `S`,H
public void sort(int[] data) { p$5uS=:4`8
MaxHeap h=new MaxHeap(); .|$:%"O&X
h.init(data); !hMD>B2Z
for(int i=0;i h.remove(); ID{62>R
System.arraycopy(h.queue,1,data,0,data.length); /Bt+Ov3k
} fGZZ['E
,.<[iHC}9
private static class MaxHeap{ xE$>;30b_
cDkq@H:
void init(int[] data){ 2F}D?]A
this.queue=new int[data.length+1]; k?!CJ@5$
for(int i=0;i queue[++size]=data; 5`_UIYcI
fixUp(size); =,MX%-2
} (+(YQ2
} g-C)y 06
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private int size=0; buj*L&
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private int[] queue; s%bm1$}
E;o "^[we
public int get() { hL?"!
return queue[1]; pW7#&@AR
} Zra P\?
ZwFVtR
public void remove() { ,J@A5/B,AA
SortUtil.swap(queue,1,size--); kd=|Iip;(
fixDown(1); RJ+["[k
} J4) ?hS
file://fixdown FjU -t/
private void fixDown(int k) { Qi;62M
int j; |34M.YjA
while ((j = k << 1) <= size) { _xmS$z)TO
if (j < size %26amp;%26amp; queue[j] j++; x:? EL)(
if (queue[k]>queue[j]) file://不用交换 IaHu$` v
break; d#U~>wr
SortUtil.swap(queue,j,k); Zk+c9,q
k = j; qS!U1R?s
} Dk^T_7{
} AxAbU7m
private void fixUp(int k) { -+HD5Hc
while (k > 1) { PKg>|]Rf.
int j = k >> 1; /D>G4PP<
if (queue[j]>queue[k]) \c\z 6;j
break; S\S31pYT
SortUtil.swap(queue,j,k); \%czNF
k = j; <HfmNhI85(
} oXgi#(y
} L;i(@tp|v
:\"V5
} m85Hx1!p.
0..]c-V(G
} IIY3/
@=6*]:p2.
SortUtil： /=[hRn@)A
5_[we1$P
package org.rut.util.algorithm; *cy!PF&
VT2f\d[Q
import org.rut.util.algorithm.support.BubbleSort; pC/13|I
import org.rut.util.algorithm.support.HeapSort; .YlhK=d4
import org.rut.util.algorithm.support.ImprovedMergeSort; `6\u!#
import org.rut.util.algorithm.support.ImprovedQuickSort; \qkb8H
import org.rut.util.algorithm.support.InsertSort; l\_81oZ
import org.rut.util.algorithm.support.MergeSort; k9!euj&
import org.rut.util.algorithm.support.QuickSort; Jy P$'v~
import org.rut.util.algorithm.support.SelectionSort; 62 9g_P)
import org.rut.util.algorithm.support.ShellSort; ` 1vDp.
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/** 5I&Dk4v
* @author treeroot B4eV$~<
* @since 2006-2-2 V$g!#V
* @version 1.0 XaH;
*/ "]}?{2i;
public class SortUtil { 3XIL; 5
public final static int INSERT = 1; `4-m$ab
public final static int BUBBLE = 2; '3iJq9
public final static int SELECTION = 3; w,-4A o2x
public final static int SHELL = 4; U"535<mR
public final static int QUICK = 5; m1DrT>oN'
public final static int IMPROVED_QUICK = 6; ~Z}DN*S
public final static int MERGE = 7; q"u,r6ED
public final static int IMPROVED_MERGE = 8; &*; Z(ul&9
public final static int HEAP = 9; Qov*xRO6
l{Xy %8
public static void sort(int[] data) { ;~Gez;AhK
sort(data, IMPROVED_QUICK); W?yGV{#V(=
} >"[Nmx0;w
private static String[] name={ ->'xjD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \t]_UNGyW
}; tja7y"(]
`8kL=%(h
private static Sort[] impl=new Sort[]{ 5zPn-1uW
new InsertSort(), 7!JBF{,=
new BubbleSort(), `V{'GF&[
new SelectionSort(), ?~X^YxWsY
new ShellSort(), GHFYIor
new QuickSort(), |N0RBa4%
new ImprovedQuickSort(), 7Mb-v}
new MergeSort(), u-=VrHff^*
new ImprovedMergeSort(), !=?Q>mz
new HeapSort() cHon' tS
}; m}]\^$d
$$eBr8
public static String toString(int algorithm){ Bkdt[qDn5P
return name[algorithm-1]; `.F3&pA
} [fg-"-+:M
l@g%A# _
public static void sort(int[] data, int algorithm) { f`-UC_(;
impl[algorithm-1].sort(data); s} oD?h:T3
} sV`p3L8pl
~N8$abQJV
public static interface Sort { U,V+qnS
public void sort(int[] data); $spk.j
} _CG ED{b@
SA{5A 1
public static void swap(int[] data, int i, int j) { G=&nwSL
int temp = data; X{P=2h#g
data = data[j]; .QB)Y* z
data[j] = temp; KVPWJHGr
} 3zzl|+# 6
} u_6x{",5I