[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; s6).?oE
} 4- 6'
int i1=l; Ar=pzQ<Z{
int i2=mid+1; T cSj`-
for(int cur=l;cur<=r;cur++){ e[n T'e
if(i1==mid+1) JT<Ia
data[cur]=temp[i2++]; >1mCjP
else if(i2>r) o,Ew7~u
data[cur]=temp[i1++]; }kXF*cVg
else if(temp[i1] data[cur]=temp[i1++]; wEzLfZ Oz/
else JVTG3:zD
data[cur]=temp[i2++]; 2@ACmh
} I[<C)IG
} S`X;2\:
X'[SCs
} 1/w['d4l!
OjeM#s#N!
改进后的归并排序: JYKA@sZHe
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package org.rut.util.algorithm.support; |TEf? <"c
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import org.rut.util.algorithm.SortUtil; )Hlr 09t=]
+\.gdL)
/** rMf& HX
* @author treeroot 4U>
* @since 2006-2-2 `t ZvIy*
* @version 1.0 :fpYraBM
*/ /k}vm3
public class ImprovedMergeSort implements SortUtil.Sort { |n~,$
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private static final int THRESHOLD = 10; p#J}@a
O,xU+j~)
/* ]rHdG^0uss
* (non-Javadoc) se$GE:hC1Q
* i':<Ro
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <(@m913|
*/ )BS./zD*[<
public void sort(int[] data) { 5oWR}qqFK
int[] temp=new int[data.length]; -jFt4Q7}8
mergeSort(data,temp,0,data.length-1); 7=mU["raz`
} |3\ mH~Bw
,n~H]66n
private void mergeSort(int[] data, int[] temp, int l, int r) { YJXh|@LT
int i, j, k; |'mgo
int mid = (l + r) / 2; .wS' Xn&
if (l == r) =?T'@C
return; @;d(>_n
if ((mid - l) >= THRESHOLD) aLuxCobV
mergeSort(data, temp, l, mid); aeE9dV~
else T3)/?f?|
insertSort(data, l, mid - l + 1); ^^)D!I"cA,
if ((r - mid) > THRESHOLD) A^ t[PKM"
mergeSort(data, temp, mid + 1, r); H`aqpa"C
else )MW.Y
insertSort(data, mid + 1, r - mid); oXV
~n|*-rca
for (i = l; i <= mid; i++) { eH=lX9
temp = data; 3MiNJi#=2
} f#/v^Ql*
for (j = 1; j <= r - mid; j++) { +vBq,'k`
temp[r - j + 1] = data[j + mid]; m/%sBw\rx
} 07# ~cVI
int a = temp[l]; !1)lGjMW
int b = temp[r]; Sep}{`u
for (i = l, j = r, k = l; k <= r; k++) { +@AN+!(
if (a < b) { Bk>Ch#`Bw
data[k] = temp[i++]; N~g'Z `
a = temp; z)yxz:E
} else { @+:S'mAQC
data[k] = temp[j--]; vXRfsv y
b = temp[j]; JTQ$p*2]
} x>;!`}x
} 8GV$L~i
} [L] ca*
&T}~h^/t
/** avykg(
* @param data ft4J.oT
* @param l =?0o5|u]
* @param i l)HF4#Bs
*/ .P9ALJP(b
private void insertSort(int[] data, int start, int len) { y7ijT='8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m(XcPb
} *pyi;
} DU4NPys]y
} S3`zB?7,
} y 7|x<Z
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堆排序： 7?qRY9Qu
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package org.rut.util.algorithm.support; 8BhLO.(<O
;Q:^|Fw!F
import org.rut.util.algorithm.SortUtil; h~urZXD<
aYkm]w;C
/** '|G_C%,B
* @author treeroot a7)q^;:O
* @since 2006-2-2 b`PAOQ
* @version 1.0 8sx\b
*/ P'KaWu9z
public class HeapSort implements SortUtil.Sort{ KaZ*HPe(
O+@"l$;N
/* (non-Javadoc) \3hhM}6)DM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [58xT>5`m
*/ %XMrSlSOp
public void sort(int[] data) { ` Cdk b5
MaxHeap h=new MaxHeap(); CY?]o4IV
h.init(data); [kMXr'TyPX
for(int i=0;i h.remove(); c1'OIK C
System.arraycopy(h.queue,1,data,0,data.length); <:W]uT
} 5tX|@Z: z
'{@hBB+ D
private static class MaxHeap{ "O<JVC{m
5-0
void init(int[] data){ O{,Uge2n,
this.queue=new int[data.length+1]; r3mB"("Z'
for(int i=0;i queue[++size]=data; &$.Vi&{.
fixUp(size); @ZK#Y){
} $M@SZknm
} p)(mF"\8=
.[? E1we
private int size=0; ZsirX~W<
j/5>zS
private int[] queue; ,]w-!I
:(c2YZ
public int get() { xC9^x7%3O
return queue[1]; 72GXgah
} DQDt*Uj,
:+|b7fF
public void remove() { #r `hK)
SortUtil.swap(queue,1,size--); 5H1SC8+B,
fixDown(1); IpXg2QbN
} %qcBM~efT
file://fixdown if9I7@
private void fixDown(int k) { `o8b\p\zn
int j; L%ND?'@
while ((j = k << 1) <= size) { 4NMv7[r
if (j < size %26amp;%26amp; queue[j] j++; 1M7=*w,
if (queue[k]>queue[j]) file://不用交换 %np b.C|+
break; y@ J\h8_
SortUtil.swap(queue,j,k); 4xuL{z;\
k = j; !bFa\6]q
} r*C:)z.}
} Q*+@"tk<
private void fixUp(int k) { E j@M\
while (k > 1) { s1<_=sfnT
int j = k >> 1; y%Ui)UMnw]
if (queue[j]>queue[k]) s03DL
break; 7uFM)b@.P
SortUtil.swap(queue,j,k); RXkE"H{
k = j; [aU#"k)M
} 8XD9fB^
} Z'6 o$Xv
>|KfO>
} JAj<*TB.%
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} xojy[c#
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SortUtil： Ih!UL:Ckh
0|9(oP/:
package org.rut.util.algorithm; ELeR5xT
<1.].A@b*
import org.rut.util.algorithm.support.BubbleSort; ])!|b2:s3
import org.rut.util.algorithm.support.HeapSort; u`$,S&Er
import org.rut.util.algorithm.support.ImprovedMergeSort; %?J\P@
import org.rut.util.algorithm.support.ImprovedQuickSort; 2/RK pl &
import org.rut.util.algorithm.support.InsertSort; k ~lj:7g~
import org.rut.util.algorithm.support.MergeSort; oJVpNE[3]
import org.rut.util.algorithm.support.QuickSort; d}3<nz,
import org.rut.util.algorithm.support.SelectionSort; I&3L1rl3{*
import org.rut.util.algorithm.support.ShellSort; F IDNhu
l]Jk }.
/** m1a0uEA G
* @author treeroot >Y?B(I2e
* @since 2006-2-2 R!lNm,i
* @version 1.0 aD8cqVhM3&
*/ |jJC~/WR
public class SortUtil { + 1\1Z@\M
public final static int INSERT = 1; L.$9ernVY
public final static int BUBBLE = 2; 8s-RNA>7^
public final static int SELECTION = 3; u{"o*udU
public final static int SHELL = 4; EC&t+"=R
public final static int QUICK = 5; {cnya*
public final static int IMPROVED_QUICK = 6; 38b%km#
public final static int MERGE = 7; 2/sD#vC
public final static int IMPROVED_MERGE = 8; Bs =V-0
public final static int HEAP = 9; m=Y9sB
c!T^JZBb
public static void sort(int[] data) { HWT0oh]
sort(data, IMPROVED_QUICK); ^*"&e\+p
} M7/P&d
private static String[] name={ 9~I\WjB "
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "zc@(OA[z
}; N5#qox$D
}>b4s!k,
private static Sort[] impl=new Sort[]{ !p >a,8w
new InsertSort(), L7_(KCh
new BubbleSort(), ZD/>L/
new SelectionSort(), 9xP{#Qa
new ShellSort(), [@U8&W
new QuickSort(), F#7ZR*ZB1
new ImprovedQuickSort(), jy(,^B,]
new MergeSort(), U2 <*BRJ
new ImprovedMergeSort(), `* "u"7e
new HeapSort() Yd~K\tX:n
}; m~1{~'
TC?kuQI
public static String toString(int algorithm){ #HWz.Wb
return name[algorithm-1]; 2!\y0*}K
} m8n!<_NFt(
Y;6<AIx>
public static void sort(int[] data, int algorithm) { 5'@J}7h
impl[algorithm-1].sort(data); [&|Le;h
} 0){%4
@;qC% +^
public static interface Sort { {S%)GvrT
public void sort(int[] data); yT`[9u,
} 0aQtJ0e16
kFgN^v^t
public static void swap(int[] data, int i, int j) { 6[$kEKOY=
int temp = data; wYSvI
data = data[j]; 4q/E7n
data[j] = temp; Fkuq'C<|Y
} D;Fvd:
} Hj |~*kG