[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; @/%{15s.
} <5@PWrU?[[
int i1=l; ^6p'YYj"5
int i2=mid+1; ~2u\
for(int cur=l;cur<=r;cur++){ buk=p-oi
if(i1==mid+1) l2hG$idC
data[cur]=temp[i2++]; 8RwX=
else if(i2>r) G%#05jH
data[cur]=temp[i1++]; @tRMe64
else if(temp[i1] data[cur]=temp[i1++]; a <X0e>
else u&QKwD Uh
data[cur]=temp[i2++]; Fl>]&x*~
} 7m5Co>NkuK
} z1,tJH0
(bn Zy0
} FbACTeB
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改进后的归并排序: j;K#]
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package org.rut.util.algorithm.support; +Zk,2ri
^Jp*B;
import org.rut.util.algorithm.SortUtil; 0"[`>K~7a8
/vE]2Io
/** !.fw,!}hOD
* @author treeroot pJ,@Y>
* @since 2006-2-2 ED} 31L
* @version 1.0 K X]oE+:
*/ i[semo\E
public class ImprovedMergeSort implements SortUtil.Sort { /-0' Qa+*
I_ "Z:v{
private static final int THRESHOLD = 10; j?n+>/sG,
P"7ow-
/* 2Ohp]G
* (non-Javadoc) kpob b
* \)m"3yY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GIHpSy`z
*/ 'PdmI<eXQ
public void sort(int[] data) { '~-IV0v9
int[] temp=new int[data.length]; h[XGC=%
mergeSort(data,temp,0,data.length-1); 6xgv:,
} fMK#x\.4
FquFRx
private void mergeSort(int[] data, int[] temp, int l, int r) { #WE]`zd
int i, j, k; (*l2('e#@
int mid = (l + r) / 2; EY>8O+
if (l == r) C>|@& o1
return; KO]N%]:&~
if ((mid - l) >= THRESHOLD) aw}+'(?8]
mergeSort(data, temp, l, mid); \Rk$t7ZH
else p*;Qz
insertSort(data, l, mid - l + 1); 2Eh@e([PMs
if ((r - mid) > THRESHOLD) SlT*C6f
mergeSort(data, temp, mid + 1, r); =;c_} VY
else B!aK
insertSort(data, mid + 1, r - mid); YRB%:D@u
Fm j=
for (i = l; i <= mid; i++) { g{pQ4jKF
temp = data; lUh*?l
} ]T{E (9
for (j = 1; j <= r - mid; j++) { ]"x\=A
temp[r - j + 1] = data[j + mid]; 9]_GNk-D
} |#5 e|z5(
int a = temp[l]; ;MTz]c
int b = temp[r]; |9NIGg'n
for (i = l, j = r, k = l; k <= r; k++) { &+nRIv S_`
if (a < b) { J l7z|QS
data[k] = temp[i++]; H)JS0 G0
a = temp; {sS_|sX
} else { K^i"9D)A
data[k] = temp[j--]; T'rjh"C&|
b = temp[j]; O25mkX
} %]Cjhs"v
} @sf90&f
} ]O!s'lC
gAE!aKy
/** kC^.4n om
* @param data StQ@g
* @param l QdDtvJLf
* @param i ,# "(Z
*/ ^Qh-(u`
private void insertSort(int[] data, int start, int len) { K=kH%ZK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); , Fytk34
} EZ% .M*?
} g_D-(J`IK,
} s'2Rs^,hN
} ,8SWe
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堆排序： kHU"AD}.
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package org.rut.util.algorithm.support; !7` [i
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import org.rut.util.algorithm.SortUtil; .S vyj
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/** F RH&B5w
* @author treeroot lYQtv=q
* @since 2006-2-2 R#6H'TVE
* @version 1.0 )W9_qmYd"
*/ /| GH0L
public class HeapSort implements SortUtil.Sort{ NV!4(_~
Hhf72IX
/* (non-Javadoc) 0^\/ERK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QAaF@Do
*/ ;6<zjV7}
public void sort(int[] data) { U1^l+G^,~
MaxHeap h=new MaxHeap(); k&DGJ5m$.
h.init(data); 6D*chvNA;
for(int i=0;i h.remove(); jyjQzt >\
System.arraycopy(h.queue,1,data,0,data.length); 91;HiILgT
} ?Leyz
?Y!U*& 7
private static class MaxHeap{ 2}`R"MeS
^uBwj}6
void init(int[] data){ (n=Aa;
this.queue=new int[data.length+1]; ?Y!^I2Y6
for(int i=0;i queue[++size]=data; @W [{2d
fixUp(size); IgA.%}II}
} }vsO^4Sjc
} )H+h;U
s-5wbi.C
private int size=0; -h9#G{2W[
:1BM=_WwI
private int[] queue; Zi3T~:0p:
Sf5]=F-w
public int get() { Hd*Fc=>"Y
return queue[1]; QE6El'S
} |B|@GF?:
pU DO7Q]
public void remove() { r9;`
SortUtil.swap(queue,1,size--); |J?:91
fixDown(1); #L1>dHhat
} FAd``9kRT
file://fixdown x)\V lR
private void fixDown(int k) { '{^8_k\}B
int j; 5\?3$<1I
while ((j = k << 1) <= size) { g$gS7!u,
if (j < size %26amp;%26amp; queue[j] j++; q4k`)?k9
if (queue[k]>queue[j]) file://不用交换 k1wr/G'H[
break; 9i[4"&K
SortUtil.swap(queue,j,k); x,-S1[#X;
k = j; ??+:vai2
} X4 Y
} u !.DnKu
private void fixUp(int k) { ULTNhq R*n
while (k > 1) { #'g^Za
int j = k >> 1; \AJS,QD
if (queue[j]>queue[k]) {0fz9"|U
break; |=,83,a
SortUtil.swap(queue,j,k); #jgqkMOd,j
k = j; 4[(?L{
} Lv3XYZgW~
} Xvq^1Y?
Q4CJ]J`
} R%W@~o\p]
1(#RN9
} x~Pvh+O
6mAB(X^+
SortUtil： ?to1rFrU
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package org.rut.util.algorithm; 5R"2Wd
+0U#.|?
import org.rut.util.algorithm.support.BubbleSort; bu&;-Ynb
import org.rut.util.algorithm.support.HeapSort; #hZQ>zcF
import org.rut.util.algorithm.support.ImprovedMergeSort; 4D GY6PS
import org.rut.util.algorithm.support.ImprovedQuickSort; Y@ObwKcG
import org.rut.util.algorithm.support.InsertSort; qdO[d|d
import org.rut.util.algorithm.support.MergeSort; m1i4,
import org.rut.util.algorithm.support.QuickSort; n/?eZx1
import org.rut.util.algorithm.support.SelectionSort; BMY>a
import org.rut.util.algorithm.support.ShellSort; u'=(&><
TIETj~+
/** 0 S2v"(_T
* @author treeroot >KKeV(Ur
* @since 2006-2-2 )]tvwEo
* @version 1.0 8T<@ @6`T
*/ >6k}HrS1V
public class SortUtil { "'~|}x1Uv
public final static int INSERT = 1; quY "
public final static int BUBBLE = 2; W?=$V>)
public final static int SELECTION = 3; 7Zo&+
public final static int SHELL = 4; A1=_nt)5
public final static int QUICK = 5; Pu-p7:99;'
public final static int IMPROVED_QUICK = 6; RP(a,D|
public final static int MERGE = 7; KS?mw`Nr
public final static int IMPROVED_MERGE = 8; JxnuGkE0[#
public final static int HEAP = 9; l:q8Pg)
T G_bje
public static void sort(int[] data) { "*+\KPCU
sort(data, IMPROVED_QUICK); 8,_ -0_^$
} y&y/cML?
private static String[] name={ Rnzqw,q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B(8mH
}; </|)"OD9
YsZ{1W
private static Sort[] impl=new Sort[]{ !e&rVoA
new InsertSort(), 2+,5p
new BubbleSort(), |7]?>-
new SelectionSort(), 3;y_qwA
new ShellSort(), _Q)d+Fl
new QuickSort(), |.Em_*VG
new ImprovedQuickSort(), Z@}sCZ=#A
new MergeSort(), abL/Y23 "
new ImprovedMergeSort(), G5Je{N8W
new HeapSort() 2YE7 23H=Z
}; =l_rAj~I|
Zd8drT'@#
public static String toString(int algorithm){ -%>8.#~G
return name[algorithm-1]; sr;:Dvx~
} D DQs42[
sw[oQ!f
public static void sort(int[] data, int algorithm) { 9LH=3Qt
impl[algorithm-1].sort(data); hHCzj*5
} 1B6C<cL:sU
8~.iuFp
public static interface Sort { ';&0~[R[
public void sort(int[] data); .N/GfR`0/<
} |O57N'/
/8=:qIJYA
public static void swap(int[] data, int i, int j) { m5)EQE}gPp
int temp = data; xLe =d|6
data = data[j]; B*y;>q "{U
data[j] = temp; h (qshbC}
} 0{-`Th+h
} : #3OcD4