[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; !PJ6%"
} 78OIUNm`
int i1=l; QC;^xG+W
int i2=mid+1; W.0L:3<"
for(int cur=l;cur<=r;cur++){ :WL'cJ9a
if(i1==mid+1) fasgmi}
data[cur]=temp[i2++]; Qx47l
else if(i2>r) 69NQ]{1
data[cur]=temp[i1++]; #ap9Yoyk\
else if(temp[i1] data[cur]=temp[i1++]; WT`4s
else D{4YxR PX
data[cur]=temp[i2++]; [$"n^5_~
} lBFMwJU)
} q^L<X)
p4i]7o@
} 16i"Yg!*
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改进后的归并排序: H;fxxu`cS
z0*_^MH
package org.rut.util.algorithm.support; MxcFvo*LCp
wz.6du6-
import org.rut.util.algorithm.SortUtil; 7=OQ8IM!
H4!+q:<
/** /E5 5Pec
* @author treeroot ~\3kx]^10
* @since 2006-2-2 Z(_ZAB%+D
* @version 1.0 $N=N(^
*/ ;cz|ss=
public class ImprovedMergeSort implements SortUtil.Sort { Ox'/`Mppw
JPWOPB'H
private static final int THRESHOLD = 10; ~JDnKo
' dx1x6
/* nn9wdt@.]
* (non-Javadoc) &0(
* [.*;6y3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1YJC{bO
*/ FH%GIi
public void sort(int[] data) { A7`1-#
int[] temp=new int[data.length]; S^<g_q
mergeSort(data,temp,0,data.length-1); pzgSg[|
} }~h(w^t
,qrQ"r9
private void mergeSort(int[] data, int[] temp, int l, int r) { RxN,^!OV
int i, j, k; u% n*gcY
int mid = (l + r) / 2; b-*3 2Y%
if (l == r) ^ Dt#$Z
return; `TPOCxM Mo
if ((mid - l) >= THRESHOLD) \3jW~FV
mergeSort(data, temp, l, mid); 9{8GP
else $gM8{.!
insertSort(data, l, mid - l + 1); <K4,7J$}h
if ((r - mid) > THRESHOLD) ZzBQe
mergeSort(data, temp, mid + 1, r); U}l14
else zf>5,k'x'A
insertSort(data, mid + 1, r - mid); FwZ>{~?3
~/ilx#d
for (i = l; i <= mid; i++) { ^F"iP7
temp = data; @*DyZB
} \y{Tn@7
for (j = 1; j <= r - mid; j++) { T=:]]nf?M
temp[r - j + 1] = data[j + mid]; 4r0b)Y&I
} Yl$SW;@
int a = temp[l]; g@Qgxsyk>
int b = temp[r]; b(I2m
for (i = l, j = r, k = l; k <= r; k++) { D^;*U[F?
if (a < b) { .*JA!B
data[k] = temp[i++]; F5qFYL;
a = temp; AkT<2H|4
} else { A &9(mB
data[k] = temp[j--]; okFvn;
b = temp[j]; 5rV((
} l?)ZJ3]a
} H7kPM[
} a9?y`{%L
?kz+R'
/** }AvcoD/b
* @param data N9<Ujom
* @param l h}Wdh1.M3
* @param i 1uk0d`JL
*/ *79m^
private void insertSort(int[] data, int start, int len) { ?}Lg)EFH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GzTq5uU&
} EK$Kee}~
} )CS.F=
} `K >?ju"
} oo$MWN8a>r
o(Cey7
堆排序： 02k4N%
xlR2|4|8
package org.rut.util.algorithm.support; 35x 0T/8
hwDbs[:
import org.rut.util.algorithm.SortUtil; X5*C+ I=2
ow'lRHZ
/** WmQ01v
* @author treeroot )*d W=r/$V
* @since 2006-2-2 sfVf@0g
* @version 1.0 }Y17*zp%
*/ xyE1Gw`V
public class HeapSort implements SortUtil.Sort{ j9/-"dTL
1lnU77;
/* (non-Javadoc) 7gS1~Q4\V2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $8BE[u|H2
*/ U`x bPQ
public void sort(int[] data) { Q\3 Z|%
MaxHeap h=new MaxHeap(); 1Fi86
h.init(data); qJ_1*!!91
for(int i=0;i h.remove(); (:+>#V)pZ
System.arraycopy(h.queue,1,data,0,data.length); T^}
} X+n`qiwq
*}):<nB$^
private static class MaxHeap{ TjBY 4
<[/%{sUNC
void init(int[] data){ ozr9>b>M
this.queue=new int[data.length+1]; )2E%b+"
for(int i=0;i queue[++size]=data; #DkD!dW(l
fixUp(size); b( ^^m:(w
} swc@34ei\
} oAZh~~tp
cDXsi#Raj
private int size=0; O8N[Jl
O;]?gj 1@
private int[] queue; Sb:T*N0gS
I6LD)?
public int get() { ]> Y/r-!
return queue[1]; L{ymI)Y^
} XO F1c3'H
u.|~$yP.!
public void remove() { EC?Efc+O
SortUtil.swap(queue,1,size--); 5H:@8,B
fixDown(1); Kt.~aaG_
} ;#G%U!p
file://fixdown :'r6TVDW
private void fixDown(int k) { 0D(cXzQP
int j; R& =f:sEi
while ((j = k << 1) <= size) { 8"vwU@cfC
if (j < size %26amp;%26amp; queue[j] j++; HpexH{.u)
if (queue[k]>queue[j]) file://不用交换 7=*VpX1
break; |H ;+1
SortUtil.swap(queue,j,k); 7XyOB+aQO
k = j; lg1PE7
} I2HT2c$
} Cj;/Uhs
private void fixUp(int k) { rFL$QC2
while (k > 1) { 396R$\q
int j = k >> 1; .%0ne:5
if (queue[j]>queue[k]) Z]:BYX'
break; u&TdWZe
SortUtil.swap(queue,j,k); $X+u={]
k = j; pyW u9
} =<<3Pkv7@
} e"+dTq8W
|[cdri^?D
} I&1!v8
C/v}^#cLD
} H*W):j}8
%>XN%t'6aT
SortUtil： | D.C!/69
P?3{z="LzJ
package org.rut.util.algorithm; i.rU&yT%
z4} %TT@^
import org.rut.util.algorithm.support.BubbleSort; hPufzhT
import org.rut.util.algorithm.support.HeapSort; uf@U:V
import org.rut.util.algorithm.support.ImprovedMergeSort; 27#8dV?
import org.rut.util.algorithm.support.ImprovedQuickSort; h#3m4<w(9
import org.rut.util.algorithm.support.InsertSort; |j_`z@7(
import org.rut.util.algorithm.support.MergeSort; hE!7RM+Y
import org.rut.util.algorithm.support.QuickSort; mT_GrIl[
import org.rut.util.algorithm.support.SelectionSort; CJqc\I~
import org.rut.util.algorithm.support.ShellSort; E:VGji7s
F1A1@{8bN
/** `%E9xcD%
* @author treeroot ~r`Wr`]_z
* @since 2006-2-2 G+Dpma ]
* @version 1.0 ;WI]vn
*/ te2 Iu%5 z
public class SortUtil { z*.v_Mx
public final static int INSERT = 1; "jZm0U$,*
public final static int BUBBLE = 2; Qm);6X
public final static int SELECTION = 3; C;sgK
public final static int SHELL = 4; hswTn`f
public final static int QUICK = 5; <FmBa4ONU
public final static int IMPROVED_QUICK = 6; XS0V:<+,
public final static int MERGE = 7; {~GR8 U
public final static int IMPROVED_MERGE = 8; WaYO1*=
public final static int HEAP = 9; mTEVFm
V8'`nuC+
public static void sort(int[] data) { AQci,j"
sort(data, IMPROVED_QUICK); J`Oy.Qu)
} cztS]dcf>~
private static String[] name={ w6EI{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1-$P0
}; ~Ob8i1S>
b]`^KTYK
private static Sort[] impl=new Sort[]{ Jqg3.2q
new InsertSort(), aW@oE ~`
new BubbleSort(), z`'P>.x
new SelectionSort(), A ^B@VuK
new ShellSort(), s-Y+x
new QuickSort(), A!;meVUs
new ImprovedQuickSort(), MCAXt1sL&E
new MergeSort(), Jf+7"![|
new ImprovedMergeSort(), UpeQOC
new HeapSort() q$^<zY
}; M1uP\Sa
"3t\em!
public static String toString(int algorithm){ ;?8Iys#
return name[algorithm-1]; {aJz. `u\
} ~N[|bPRmhE
3zb)"\(R
public static void sort(int[] data, int algorithm) { ma7fDo0,`h
impl[algorithm-1].sort(data); <R~KM=rL
} Cj$H[K}>
P|N?OocE
public static interface Sort { tQ0=p| T]
public void sort(int[] data); ]hUKuef
} ?-{IsF^
6{^*JC5nj
public static void swap(int[] data, int i, int j) { cMtJy"kK
int temp = data; Mw|SH;nM
data = data[j]; #KJZR{
data[j] = temp; N<bD
} s?<!&Y
} gX"T*d>y