[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; T]=r Co
} +lMX{es\O
int i1=l; Y1J=3Y
int i2=mid+1; A"rfZ`
for(int cur=l;cur<=r;cur++){ @0u~?!g@
if(i1==mid+1) lH6OcD:kj
data[cur]=temp[i2++]; +P`*kj-P\
else if(i2>r) Kiu_JzD
data[cur]=temp[i1++]; L|}lccpI
else if(temp[i1] data[cur]=temp[i1++]; cj'}4(
else J\M>33zu
data[cur]=temp[i2++]; A*/HjTX
} O2%?
} :1bWVM)
~,B5Hc 2
} K$E3QVa
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改进后的归并排序: q;][5
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package org.rut.util.algorithm.support; G%W8S \
mh{1*T$fP
import org.rut.util.algorithm.SortUtil; -K3^BZHI
^>hWy D
/** ='Y!+
* @author treeroot zp%Cr.)$
* @since 2006-2-2 TO?R({yx*
* @version 1.0 "$N+"3I
*/ Gf<'WQ[
public class ImprovedMergeSort implements SortUtil.Sort { ikvWh<=>H
qtQ6cqLd
private static final int THRESHOLD = 10; l)&X$3?tz
''\Ov
/* Dw<bn<e-
* (non-Javadoc) SX# e:_
* x?2@9u8Yb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R&BTA
*/ KQg]0y d
public void sort(int[] data) { <BMXCk
int[] temp=new int[data.length]; 2h1vVF3
mergeSort(data,temp,0,data.length-1); t_$2CRG#
} "C{}Z
"Pu!dJ5[]
private void mergeSort(int[] data, int[] temp, int l, int r) { f>UXD
int i, j, k; Xy$3VU*
int mid = (l + r) / 2; +>{Y.`a;Jo
if (l == r) pw)||Q
return; a@UZb
if ((mid - l) >= THRESHOLD) + |#O@k
mergeSort(data, temp, l, mid); *&^:T~|=!
else w.YiO5|y
insertSort(data, l, mid - l + 1); #x 177I\
if ((r - mid) > THRESHOLD) ASk|A!
mergeSort(data, temp, mid + 1, r); nwF2aRNV
else iA'lon
insertSort(data, mid + 1, r - mid); y+c|vdW%
{_ i\f ]L
for (i = l; i <= mid; i++) { Kk-S}.E
temp = data; G <i@ 5\#
} iiS-9>]/
for (j = 1; j <= r - mid; j++) { ECrex>zr%
temp[r - j + 1] = data[j + mid]; uP~@U"!
} Vt".%d/`7
int a = temp[l]; +~mA}psr
int b = temp[r]; ~l]ve,W[
for (i = l, j = r, k = l; k <= r; k++) { {pnS Q
if (a < b) { ,P70Jb
data[k] = temp[i++]; jw^<IMAG\8
a = temp; hp5|@
} else { '+?"iVVo
data[k] = temp[j--]; ZK@N5/H(
b = temp[j]; 0"\H^
} @M_oH:GV
} hPUYyjXPB
} "NXB$a!:
y)W@{@{kl
/** %'s>QF]'
* @param data D*gFV{Ws
* @param l ;U.hxh;+
* @param i d(:8M
*/ N`L0Vd
private void insertSort(int[] data, int start, int len) { =WyZX 7@R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LE9(fe) fe
} ToXki,
} MbZJ;,e?
} V@cM|(
} #t:S.A@
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堆排序： KLitg6&P
8&?s#5zA
package org.rut.util.algorithm.support; }%'?p<^M
hRrn$BdLX
import org.rut.util.algorithm.SortUtil; XINu=N(g
g1W.mAA3B
/** #><.oreXq
* @author treeroot V-Sd[
* @since 2006-2-2 LYz.Ci}
* @version 1.0 ^Eb.:}!D6
*/ \eT5flC
public class HeapSort implements SortUtil.Sort{ aTqd@},?
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/* (non-Javadoc) Q@<S[Qh[.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z$/_I0[
*/ ;*:]*|bw
public void sort(int[] data) { f78An 8
MaxHeap h=new MaxHeap(); [z`31F
h.init(data); MGR!Z@1y
for(int i=0;i h.remove(); .!$*:4ok
System.arraycopy(h.queue,1,data,0,data.length); s;S?;(QI
} F`Q[6"<a
uW@oyZUj
private static class MaxHeap{ zQ@I}K t
m'6&9Jak
void init(int[] data){ #\.,?A}9
this.queue=new int[data.length+1]; (Pf+0,2
for(int i=0;i queue[++size]=data; aJ-K?xQ
fixUp(size); EN;}$jZ>47
} s:#V(<J
} sk,ox~0R
4cabP}gBk
private int size=0; g`vny)\7/
aT)BR?OYSJ
private int[] queue; oX S1QT`B
kI 4MiK
public int get() { Bm.:^:&k
return queue[1]; bx{$Y_L+p
} w)kNkD
dZ rAn
public void remove() { aqRhh=iS
SortUtil.swap(queue,1,size--); ypKUkH/
fixDown(1); hbzC#@q
} 2ORNi,_I
file://fixdown \ 3wfwu.q
private void fixDown(int k) { 7\$qFF-y
int j; 75"f2;
while ((j = k << 1) <= size) { -:2$ %
if (j < size %26amp;%26amp; queue[j] j++; \W1,F6&j
if (queue[k]>queue[j]) file://不用交换 R7$:@<:g
break; 9[b<5Llt
SortUtil.swap(queue,j,k); Q[vJqkgT
k = j; wRcAX%n&
} CFzNwgv]z
} \Xm,OE_v"
private void fixUp(int k) { WQ[_hg|k
while (k > 1) { "?ucO4d
int j = k >> 1; !;i`PPRwk
if (queue[j]>queue[k]) DnCP aM4%
break; -8:&>~4`
SortUtil.swap(queue,j,k); Ghx3EVqnx"
k = j; E^ P,*s
} Bg5Wba%NK
} xO^:_8=&:
v(B<Nb
} ^W'fA{sr
!%^^\,
} z=rT%lz6
# {w9s0:
SortUtil： ZHU5SXu
%QH)'GJQ
package org.rut.util.algorithm; |Y$uqRdV
*)ardZV${
import org.rut.util.algorithm.support.BubbleSort; 1crnmJ!C
import org.rut.util.algorithm.support.HeapSort; s}UjGFP
import org.rut.util.algorithm.support.ImprovedMergeSort; 87<-kV
import org.rut.util.algorithm.support.ImprovedQuickSort; $@^pAP
import org.rut.util.algorithm.support.InsertSort; zEd0Tmt
import org.rut.util.algorithm.support.MergeSort; r=5{o1"
import org.rut.util.algorithm.support.QuickSort; >XY`*J^
import org.rut.util.algorithm.support.SelectionSort; MBt9SXM
import org.rut.util.algorithm.support.ShellSort; UR7g`/
BSYzC9h`
/** iF-6Y0~8
* @author treeroot u [m
* @since 2006-2-2 ,uo'c_f(e
* @version 1.0 ?EJD?,}
*/ A<5ZF27
public class SortUtil { J7=+
public final static int INSERT = 1; IE;~?W"
public final static int BUBBLE = 2; _hRcc"MS`
public final static int SELECTION = 3; f!oT65Vmi
public final static int SHELL = 4; iYDEI e
public final static int QUICK = 5; [`{Z}q&
public final static int IMPROVED_QUICK = 6; ,TXTS*V?
public final static int MERGE = 7; W3IpHV
public final static int IMPROVED_MERGE = 8; xC*6vH]?
public final static int HEAP = 9; T*#/^%HSG
@ zs'Y8
public static void sort(int[] data) { 1<BX]-/tP
sort(data, IMPROVED_QUICK); oFy=-p+C
} 5b!vgm#])
private static String[] name={ |zQ4u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fBRo_CU8!
}; X9p.gXF
9z}uc@#D=m
private static Sort[] impl=new Sort[]{ )-0kb~;|
new InsertSort(), $nb[G$
new BubbleSort(), 3a?o3=
new SelectionSort(), p[hZ@f(z
new ShellSort(), b%<9Sn
new QuickSort(), DB-l$rj
new ImprovedQuickSort(), IhA5Wt0j
new MergeSort(), 12;8o<~
new ImprovedMergeSort(), 2_n7=&
new HeapSort() lzYEx
}; o_@4Sl8
n#q<`}u,
public static String toString(int algorithm){ *pAV2V(!23
return name[algorithm-1]; BybW)+~
} 85n1eE
D}dn.$
public static void sort(int[] data, int algorithm) { iVB86XZ`
impl[algorithm-1].sort(data); wF|fK4F
} PV9pa/`@
`S6x<J&T\/
public static interface Sort { Sx?ua<`:d
public void sort(int[] data); JHz [7
} pQshUm"_
S`#w+C#EW
public static void swap(int[] data, int i, int j) { -j73Wz
int temp = data; AWP"b?^G|
data = data[j]; ]|MEx{BG-
data[j] = temp; .Xce9C0SW
} ( M7pT
} x|mqL-Q f