[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; FEm=w2
} =7ydk"xM*
int i1=l; h ; kfh.
int i2=mid+1; )%JD8;[Jq
for(int cur=l;cur<=r;cur++){ <`g3(?
if(i1==mid+1) =K$,E4*
data[cur]=temp[i2++]; F;D1F+S
else if(i2>r) S_8r\B[>P
data[cur]=temp[i1++]; (a{ZJI8_
else if(temp[i1] data[cur]=temp[i1++]; >xd<YwXZ
else W8aU"_
data[cur]=temp[i2++]; RazBc.o<
} .gT4_
} YL^Z4: p
# .q#OC
} u.6P-yh
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改进后的归并排序: x0Bw{>Q
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package org.rut.util.algorithm.support; /)V4k:#b
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import org.rut.util.algorithm.SortUtil; uu}-"/<~7
wRVD_?
/** MD'>jO;n
* @author treeroot YU\Gj S~>&
* @since 2006-2-2 &:!ij
* @version 1.0 ?q%b*Ek
*/ FDLd&4Ex
public class ImprovedMergeSort implements SortUtil.Sort { V-vlTgemwc
<TjBd1
private static final int THRESHOLD = 10; zk>h u<_
%2yAvGa1
/* ]*ov&{'
* (non-Javadoc) D<nxr~pQ
* 1!/-)1t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jp m#hH{R
*/ |%ZpatZA5
public void sort(int[] data) { fS./y=j(X
int[] temp=new int[data.length]; 6GKT yN
mergeSort(data,temp,0,data.length-1); JE)J<9gf
} f9'] jJ+
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private void mergeSort(int[] data, int[] temp, int l, int r) { +"L$ed(=nJ
int i, j, k; "=A|K~b
int mid = (l + r) / 2; B| Q6!
if (l == r) c)3O/`
return; ahp1!=Z-=
if ((mid - l) >= THRESHOLD) t:9 ZCu ay
mergeSort(data, temp, l, mid); },6*Y*?{
else J~dTVBx
insertSort(data, l, mid - l + 1); o>!JrH
if ((r - mid) > THRESHOLD) N5\{yV21",
mergeSort(data, temp, mid + 1, r); #Wx=v$"
else OROqT~6G
insertSort(data, mid + 1, r - mid); ylkqhs&
d;g-3Pf
for (i = l; i <= mid; i++) { vPsq<l}
temp = data; ^Fp=y,D
} #{w5)|S#JD
for (j = 1; j <= r - mid; j++) { g8Aj `O
temp[r - j + 1] = data[j + mid]; D-iUN
} lJj&kVHb
int a = temp[l]; MOLO3?H(
int b = temp[r]; #HDesen
for (i = l, j = r, k = l; k <= r; k++) { !Mil?^
if (a < b) { _m7co :
data[k] = temp[i++]; {]M>Y%j48
a = temp; )G4rJ~#@
} else { ;KS`,<^-
data[k] = temp[j--]; ;fx1!:;.
b = temp[j]; irmwc'n]
} hfh.eL
} x3;jWg~'
} lEa W7j
acP ;(t
/** DvJB59:_}
* @param data eE,;K1
* @param l O*4gV}:G
* @param i ?'f^X$aS
*/ 1 mHk =J~
private void insertSort(int[] data, int start, int len) { pVz pN8!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tnL."^%A2I
} 1g81S_T .
} gA"<MI'y
} +{Gw9h"5g*
} N&N 82OG
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堆排序： M1gP R
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package org.rut.util.algorithm.support; &%}6q]e
X?kPi&ru
import org.rut.util.algorithm.SortUtil; rr)9Y][l}
[>wzl"cHW
/** EaCZx
* @author treeroot cb4b,Ri
* @since 2006-2-2 1{7_ `[
* @version 1.0 =<>pKQ)[
*/ wmiafBA e
public class HeapSort implements SortUtil.Sort{ s79q5
@[0jFjK
/* (non-Javadoc) VlV)$z_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) excrXx
*/ :SQLfOQ
public void sort(int[] data) { bCt_yR
MaxHeap h=new MaxHeap(); w0$R`MOR+
h.init(data); w@2~`<Hk'"
for(int i=0;i h.remove(); tNYJQ
System.arraycopy(h.queue,1,data,0,data.length); u IF$u
} 6_Fpca3L
*<?XTs<
private static class MaxHeap{ :;<\5Oy ^
j]#wrm
void init(int[] data){ 5(KG=EHj_
this.queue=new int[data.length+1]; $Llvp bl
for(int i=0;i queue[++size]=data; b_ypsGE]5!
fixUp(size); "u,sRbL
} G+fd.~aGE
} (}6wAfGo
oq243\?Y
private int size=0; .?70=8{
g"w)@*?K
private int[] queue; N]V/83_
>|5XaaDa
public int get() { xdCs5ko
return queue[1]; 5UPPk$8`
} _>;&-e
z?I+u*rF6
public void remove() { Mo~ki"9.
SortUtil.swap(queue,1,size--); v^;-@ddr
fixDown(1); P~o@9RV-
} (}sDm~;s
file://fixdown $e>/?Ss
private void fixDown(int k) { Cv0&prt
int j; QZ?O;K1|y
while ((j = k << 1) <= size) { '+tKvTU;
if (j < size %26amp;%26amp; queue[j] j++; HqB|SWyK
if (queue[k]>queue[j]) file://不用交换 VVgsLQd
break; yW[L,N7d
SortUtil.swap(queue,j,k); Jm%mm SYK
k = j; *ZX!EjICk
} OA!R5sOz"
} vP-3j
private void fixUp(int k) { VPdwSW[eM
while (k > 1) { @pTD{OW?
int j = k >> 1; 7:#
if (queue[j]>queue[k]) O{Dm;@J-aM
break; *O!T!J
SortUtil.swap(queue,j,k); >pN;J)H
k = j; (21']x
} zUNH8=U
} 10/x'#(
Q%+}
} id3)6}
^}>zYt
} q^)=F_QvG
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SortUtil： lt&$8jh
OTnu{<.a
package org.rut.util.algorithm; %3ou^mcj
7s0)3HR}
import org.rut.util.algorithm.support.BubbleSort; z7| s%&
import org.rut.util.algorithm.support.HeapSort; |*Of^IkG0
import org.rut.util.algorithm.support.ImprovedMergeSort; -mE
import org.rut.util.algorithm.support.ImprovedQuickSort; {VS''Lv
import org.rut.util.algorithm.support.InsertSort; hEVjeC
import org.rut.util.algorithm.support.MergeSort; pCz@(:0
import org.rut.util.algorithm.support.QuickSort; t1G1(F#&%
import org.rut.util.algorithm.support.SelectionSort; "w(N62z/
import org.rut.util.algorithm.support.ShellSort; 83\o(
B>{|'z?%>
/** 2f`WDL
* @author treeroot @][ a8:Y9I
* @since 2006-2-2 "xL;(Fqu
* @version 1.0 f37ji
*/ e 4 p*51ra
public class SortUtil { q-A`/9
public final static int INSERT = 1; fEx+gQW_
public final static int BUBBLE = 2; <jpeu^7
public final static int SELECTION = 3; Rrh<mo(yj#
public final static int SHELL = 4; m(8jSGV
public final static int QUICK = 5; oNiToFbQu
public final static int IMPROVED_QUICK = 6; := ]sq}IN
public final static int MERGE = 7; [q|?f?Zl
public final static int IMPROVED_MERGE = 8; hO5K\QnRL
public final static int HEAP = 9; _!CK
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public static void sort(int[] data) { {E;2&d
sort(data, IMPROVED_QUICK); w> Tyk#7lw
} IXbdS9,>F
private static String[] name={ IlcNT_ 5a8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pd)K^;em
}; M(_^'3u
BM|-GErE
private static Sort[] impl=new Sort[]{ %'RI3gy
new InsertSort(), fO[Rf_
new BubbleSort(), Cf.pTYSl
new SelectionSort(), NvQY7C
new ShellSort(), HXD*zv@ *6
new QuickSort(), #citwMW
new ImprovedQuickSort(), l,imT$u
new MergeSort(), #]5&mKi
new ImprovedMergeSort(), y%{*uH}SL
new HeapSort() qk_p}l-F1
}; ):/<H
1mT|o_K{ T
public static String toString(int algorithm){ cmwzKu%
return name[algorithm-1]; 34X(J-1\|i
} f}L>&^I)
u@GRN`yn
public static void sort(int[] data, int algorithm) { Kj~>&WU
impl[algorithm-1].sort(data); XR{5]lKt_
} v< 65(I>
TSc~$Q]
public static interface Sort { }}kS~ w-#
public void sort(int[] data); a)I=U[
} `ENlV9
7V9%)%=h|
public static void swap(int[] data, int i, int j) { nu\
int temp = data; wJapGc!
data = data[j]; O\|C,Epm
data[j] = temp; XV74Fl
} s[0prm5.
} G;PbTsW