[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; B`g<Ge~
} Q mb[ e>
int i1=l; UiJ^~rn
int i2=mid+1; %MfGVx}nG
for(int cur=l;cur<=r;cur++){ Aivu%}_|
if(i1==mid+1) RnMBGxa
data[cur]=temp[i2++]; DCEvr"(
else if(i2>r) ]NaMZ
data[cur]=temp[i1++]; y3&Tv
else if(temp[i1] data[cur]=temp[i1++]; c'4>D,?1
else @?<N +qdH>
data[cur]=temp[i2++]; &/B2)l6a
} yf `.%
} 3S[w'
Fv?R\`52u
} T^/Gj|N*
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改进后的归并排序: LL|_c4$Ky
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package org.rut.util.algorithm.support; qWRNHUd
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import org.rut.util.algorithm.SortUtil; Jo6~r-
Ybs=W<-
/** 844tXMtPB\
* @author treeroot vDu0
* @since 2006-2-2 (t]lP/
* @version 1.0 PphR4 sIM
*/ Eg@R[ ^T
public class ImprovedMergeSort implements SortUtil.Sort { =$"zqa.B6
opUKrB
private static final int THRESHOLD = 10; v YRt2({}Z
jw:4fb
/* , aRJ!AZ
* (non-Javadoc) r*X}3t*
* D%c7JK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w?V[[$
*/ p/\$P=
public void sort(int[] data) { JLy)}8I
int[] temp=new int[data.length]; w5dIk]T
mergeSort(data,temp,0,data.length-1); d8Q_6(Ar|
} XBfiaj
&=s|
private void mergeSort(int[] data, int[] temp, int l, int r) { ;kyL>mV{
int i, j, k; }S~ysQwT
int mid = (l + r) / 2; 9#Aipu\
if (l == r) aBqe+FXp4
return; O84v*=uA
if ((mid - l) >= THRESHOLD) !1a|5 xrn
mergeSort(data, temp, l, mid); Q|j@#@O1
else ,?0-=o
insertSort(data, l, mid - l + 1); IyG= 7
if ((r - mid) > THRESHOLD) "oE^R?m
mergeSort(data, temp, mid + 1, r); D,}'E0
else $nGbT4sc
insertSort(data, mid + 1, r - mid); >D`fp
"Cyo<|
for (i = l; i <= mid; i++) { E6k?+i w
temp = data; -!C Y,'3
} Ckl7rpY+
for (j = 1; j <= r - mid; j++) { 0@sr NuW
temp[r - j + 1] = data[j + mid]; V7B=+(xK
} fG8}=xH_&
int a = temp[l]; #.\,y>`
int b = temp[r]; [p( #WM:
for (i = l, j = r, k = l; k <= r; k++) { AhbT/
if (a < b) { }%o+1 <=
data[k] = temp[i++]; c:?#zX
a = temp; %vf2||a$BS
} else { v GR \GFm
data[k] = temp[j--]; 6mI_Q2
b = temp[j]; wZ]BY;
} .gM>FUH3L
} e_>rJWI}
} BDRYip[Sa
}Ke}rM<
/** S1H47<)UF
* @param data Kh:#S|
* @param l ;G%wc!
* @param i j$|Yd=
*/ G)tq/`zNw
private void insertSort(int[] data, int start, int len) { we:5gK&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ? !oVf>
} /+<%,c$n
} 8}"f|6Wm
} fncwe ';?
} T}w*K[z $
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堆排序： LRCS)UBY(.
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package org.rut.util.algorithm.support; BuEQ^[Ex
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import org.rut.util.algorithm.SortUtil; 9U}MXY0
U2[3S\@
/** (jo(bbpj
* @author treeroot 86^ZYh
* @since 2006-2-2 ]df9'\
* @version 1.0 9aF..
*/ :bM$;
public class HeapSort implements SortUtil.Sort{ /v bO/Mr
RXx?/\~yd;
/* (non-Javadoc) qa0JQ_?o]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r_g\_y7ua
*/ Cb@S </b
public void sort(int[] data) { ohc/.5Kl
MaxHeap h=new MaxHeap(); wCq)w=,
h.init(data); Top#u
for(int i=0;i h.remove(); 9s\i(/RxW
System.arraycopy(h.queue,1,data,0,data.length); U7*VIRibv+
} 3h D2C'KD
5QL9w3L
private static class MaxHeap{ 6XOpB^@
zNsL^;uT
void init(int[] data){ -X&!dV:= 4
this.queue=new int[data.length+1]; J++sTQ(!?
for(int i=0;i queue[++size]=data; "f&i 251
fixUp(size); ltr;pc*)
} ;8;~C"
} GhgvRR$
St7D.|
private int size=0; 1)/T.q<D"
ktw!T{
private int[] queue; ~kj(s>xP
#o r7T^
public int get() { f<> YYeY
return queue[1]; Xg!|F[i
} $vw}p.
?^yh5
public void remove() { uu@'02G8
SortUtil.swap(queue,1,size--); G8(i).Q
fixDown(1); dWB8
} }d~FTre
file://fixdown @8<uAu%
private void fixDown(int k) { L"[wa.<
int j; }%>$}4 ,
while ((j = k << 1) <= size) { /qkIoF2
if (j < size %26amp;%26amp; queue[j] j++; X,!OWz:[
if (queue[k]>queue[j]) file://不用交换 sen{f^U
break; ~gi( 1<#
SortUtil.swap(queue,j,k); @Pb 1QLiz
k = j; d"d)<f
} %\{?(baOA
} Eps\iykB
private void fixUp(int k) { ^d5./M8Bd
while (k > 1) { 7].IT(
int j = k >> 1; 3 ?|; on
if (queue[j]>queue[k]) <0Egkz3s
break; aji~brq
SortUtil.swap(queue,j,k); :7DVc&0
k = j; SVs~,
} xwH|ryfs,Z
} Wse*gO
DT(Zv2
} b1,T!xL
7Yw\%}UL
} !DX/^b
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SortUtil： 6m{$rBR
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package org.rut.util.algorithm; L%s4snE
D917[<$
import org.rut.util.algorithm.support.BubbleSort; pXT$Y8M
import org.rut.util.algorithm.support.HeapSort; sO4}kxZ
import org.rut.util.algorithm.support.ImprovedMergeSort; ! ?U^+)^$
import org.rut.util.algorithm.support.ImprovedQuickSort; Mevyj;1t
import org.rut.util.algorithm.support.InsertSort; Hj4w i|
import org.rut.util.algorithm.support.MergeSort; x+:,b~Skk
import org.rut.util.algorithm.support.QuickSort; 2wuW5H8w{
import org.rut.util.algorithm.support.SelectionSort; Q0"F>%Cn
import org.rut.util.algorithm.support.ShellSort; fddbXs0Sn
QWW7I.9r
/** (Q]Y> '
* @author treeroot 4\'81"ei
* @since 2006-2-2 vzrD"
* @version 1.0 q(ET)xCeD
*/ pffw5Tc
public class SortUtil { ZLio8
public final static int INSERT = 1; MoR-8vnJ
public final static int BUBBLE = 2; _M]rH<h
public final static int SELECTION = 3; K^qUlyv
public final static int SHELL = 4; \PMKmJX0O
public final static int QUICK = 5; > %cWTC
public final static int IMPROVED_QUICK = 6; 9@z|2z2\G
public final static int MERGE = 7; $?AUk
public final static int IMPROVED_MERGE = 8; i!}nGJGg
public final static int HEAP = 9; }Ka.bZS
2hA66ar{$
public static void sort(int[] data) { +i_f.Ipp
sort(data, IMPROVED_QUICK); / -qt}
} X$h~d8@r
private static String[] name={ |XdrO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H.mQbD`X
}; @61N[
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private static Sort[] impl=new Sort[]{ FZ.z'3I
new InsertSort(), Ty4%du6?d
new BubbleSort(), -"dy z(
new SelectionSort(), |9"^s x
new ShellSort(), =|V]8 tN
new QuickSort(), f!8m
new ImprovedQuickSort(), N9h@1'>
new MergeSort(), |&RX>UW$W
new ImprovedMergeSort(), bvu<IXX=2
new HeapSort() K84cE
}; (xSi6EZ6;
8qYGlew,
public static String toString(int algorithm){ %b%<g%@i
return name[algorithm-1]; $No>-^)
} kR~4O$riG
{f-/,g~
public static void sort(int[] data, int algorithm) { % m5^p
impl[algorithm-1].sort(data); jc~*#\N
} V #\ZS{'J
j nA_!;b
public static interface Sort { Ft8h=
public void sort(int[] data); f5qHBQ
} D&6Qk&>
1;~1U9V
public static void swap(int[] data, int i, int j) { M j%|'dZz
int temp = data; 1z@# 8_@
data = data[j]; k|c0tvp
data[j] = temp; YGpp:8pen
} Jq<`j<'9
} vyOC2c8