[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; y~OP9Tg
} mIrN~)C4\
int i1=l; FnOahLS
int i2=mid+1; >U\P^yU
for(int cur=l;cur<=r;cur++){ ]T5\LNyN
if(i1==mid+1) |DsT $~D
data[cur]=temp[i2++]; Dh}d-m_5
else if(i2>r) Uv<nJM
data[cur]=temp[i1++]; _@)-#7
else if(temp[i1] data[cur]=temp[i1++]; ^u90N>Dvq
else p/LV^TQ
data[cur]=temp[i2++]; l%0-W
} c*<BU6y
} yoieWnL}
<7Yh<(R e^
} keQRS+9
t<}N>%ZO
改进后的归并排序: k=p[Mlic/
t5 ^hZZ
package org.rut.util.algorithm.support; rR{KnM
sc-hO9~k
import org.rut.util.algorithm.SortUtil; 6e.l# c!1}
7z\#"~(.
/** |G/)<1P
* @author treeroot mss.\
* @since 2006-2-2 S&l [z,
* @version 1.0 %<O~eXY
*/ &Vpr[S@:{
public class ImprovedMergeSort implements SortUtil.Sort { m#_M"B.cm
L"c.15\
private static final int THRESHOLD = 10; e^;:iJS
b ettOg
/* 1jBIi
* (non-Javadoc) Xyz/CZPi
* Zv mkb%8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iW9
*/ 5TeGdfu @
public void sort(int[] data) { rkdA4'66w
int[] temp=new int[data.length]; QAl4w)F
mergeSort(data,temp,0,data.length-1); 6N Ogi
} bQN3\mvY
;1_3E2E$
private void mergeSort(int[] data, int[] temp, int l, int r) { Fwvc+ a
int i, j, k; Tk 'Pv
int mid = (l + r) / 2; ;>5]KNj
if (l == r) Bz%wV-
return; m9c`"!
if ((mid - l) >= THRESHOLD) $Dv5TUKw
mergeSort(data, temp, l, mid); 9`H4"H>yG
else tblduiN
insertSort(data, l, mid - l + 1); ]70ZerQ~L
if ((r - mid) > THRESHOLD) &VCg`r-{~
mergeSort(data, temp, mid + 1, r); EKQ>hww8
else )@tHS-Jf
insertSort(data, mid + 1, r - mid); -~_|ZnuM9
y>T>
for (i = l; i <= mid; i++) { s`v$r,N0
temp = data; y La E]
} z'O+B}
for (j = 1; j <= r - mid; j++) { ;Vf{3
temp[r - j + 1] = data[j + mid]; 5vS[{;<&
} tU!Yg"4Q
int a = temp[l]; fb[lL7
int b = temp[r]; MlS5/9m@^
for (i = l, j = r, k = l; k <= r; k++) { @1bl<27
if (a < b) { G%!i="/9
data[k] = temp[i++]; {}RU'<D
a = temp; {z;K0
} else { 0#m=76[b
data[k] = temp[j--]; NP4u/C<
b = temp[j]; f1U8 b*F<
} v7hw%9(=
} m9DTz$S.
} v<(+ l)Ln
dd +lQJ c
/** k#/cdK!K
* @param data #2Vq"Zn
* @param l w~=xO_%
* @param i #IDLfQ5g
*/ ,S`FxJcE
private void insertSort(int[] data, int start, int len) { AG;KXL[V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f|/ ,eP$
} g"c7$
} 2BT+[
} Gfy9YH~
} CeUXGa|C
:>H{?
堆排序： ug"4P.wI
)7#3n(_np
package org.rut.util.algorithm.support; N K@6U_/W
TnKOr~@*
import org.rut.util.algorithm.SortUtil; hOFvM&$
>r}?v3QW
/** .*W7Z8!e
* @author treeroot Cy5iEI#
* @since 2006-2-2 xwHE,ykE
* @version 1.0 c7WOcy@M
*/ ,":_CY4(
public class HeapSort implements SortUtil.Sort{ A9J{>f
\O,yWyU4
/* (non-Javadoc) T#I}w\XlhP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4+p1`
*/ iO18FfM_
public void sort(int[] data) { -r~9'aEs
MaxHeap h=new MaxHeap(); <*/Z>Z_c2
h.init(data); b=Ektq
for(int i=0;i h.remove(); @LS%uqs
System.arraycopy(h.queue,1,data,0,data.length); 8b4? O"
} jJ'NYG
)"2eN3H/
private static class MaxHeap{ ,4-],~T
x'6i9]+r
void init(int[] data){ Q]RE,ZZ
this.queue=new int[data.length+1]; 8|L5nQ
for(int i=0;i queue[++size]=data; & \"cV0
fixUp(size); WYcZD_
} (hKjr1s
} jzWgyI1b
#~qzaETv,
private int size=0; \TDn q!)?
Zz'g&ewo
private int[] queue; WOeLn[
1L?W+zMO
public int get() { 8A-*MU`+
return queue[1]; Z}SqiT
} o,0 Z^"|
_oefp*iWS
public void remove() { 7,uD7R_
SortUtil.swap(queue,1,size--); [;:ocy
fixDown(1); CkV -L4Jq
} r5$!41
file://fixdown VOg'_#I
private void fixDown(int k) { {FILt3f;
int j; *{p:C
while ((j = k << 1) <= size) { N6A|
if (j < size %26amp;%26amp; queue[j] j++; xnw'&E
if (queue[k]>queue[j]) file://不用交换 (VHPcoL
break; :eevc7
SortUtil.swap(queue,j,k); R4DfqX
k = j; NMrf I0tbG
} "st+2#{
} txX>zR*)
private void fixUp(int k) { Z\n^m^Z =
while (k > 1) { EF9Y=(0|
int j = k >> 1; |;p.!FO
if (queue[j]>queue[k]) 4gmlK,a
break; g2u\gR5
SortUtil.swap(queue,j,k); yKm6 8n^
k = j; Nm%#rZrN~Q
} Uw3wR!:
} /pLf?m9
oBo |eRIt|
} x7jFYC
%ca`v;].
} AOV{@b(
_?I*:: I
SortUtil： 34_ V&8
<R_)[{ 7
package org.rut.util.algorithm; "%_T7A ![
<w?k<%( 4
import org.rut.util.algorithm.support.BubbleSort; 2l:cP2fa
import org.rut.util.algorithm.support.HeapSort; 6UqDpL7^U
import org.rut.util.algorithm.support.ImprovedMergeSort; 13Q87i5B
import org.rut.util.algorithm.support.ImprovedQuickSort; RfCu5Kn
import org.rut.util.algorithm.support.InsertSort; =xSf-\F
import org.rut.util.algorithm.support.MergeSort; N'pYz0_H
import org.rut.util.algorithm.support.QuickSort; +4[9Eb'k=
import org.rut.util.algorithm.support.SelectionSort; ]-;JHB5A_:
import org.rut.util.algorithm.support.ShellSort; zq3f@xOK
pXA|'U5]
/** $uRi/%Q9
* @author treeroot $}us+hGZ
* @since 2006-2-2 -<" ;|v4
* @version 1.0 3&+nV1
*/ #|=lU4Bf
public class SortUtil { g{2~G6%;0
public final static int INSERT = 1; G6JP3dOT
public final static int BUBBLE = 2; ~HKzqGQy>
public final static int SELECTION = 3; %8YUK/(|n
public final static int SHELL = 4; 8~Pdr]5
public final static int QUICK = 5; D$TpT X\
public final static int IMPROVED_QUICK = 6; O+=}x]q*y
public final static int MERGE = 7; z('t#J!b
public final static int IMPROVED_MERGE = 8; 'UuHyC2Ha3
public final static int HEAP = 9; J5xZLv
H"?Ndl:
public static void sort(int[] data) { 1vJj?Uqc
sort(data, IMPROVED_QUICK); 2j]uB0
} EDF0q i
private static String[] name={ WfTl\Dxw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dqFp"Xe"%
}; .CW,Td3f!
_E/
private static Sort[] impl=new Sort[]{ "2 :zWh7|
new InsertSort(), yOk{l$+
new BubbleSort(), Jq8v69fyQ
new SelectionSort(), 8{6`?qst@
new ShellSort(), f*p=j(sF
new QuickSort(), ,;<M+V3+
new ImprovedQuickSort(), HJlxpX$_
new MergeSort(), $gL^\(_3H
new ImprovedMergeSort(), w`dSc@ :
new HeapSort() 7>AMzNj
}; D^f;X.Qm
,,7hVw
public static String toString(int algorithm){ j}fSz)`i
return name[algorithm-1]; rQ&XHG>Q*
} W?[ C au-
l?Ls=J*
public static void sort(int[] data, int algorithm) { E, oR.B
impl[algorithm-1].sort(data); OE_V6Er
} Zv8_<>e
?H_>?,^
public static interface Sort { \pP1k.~UnC
public void sort(int[] data); 5Ux=5a
} <@0S]jy
Q6N?cQtOT
public static void swap(int[] data, int i, int j) { pA_e{P/
int temp = data; rdAy '38g
data = data[j]; x]4>f[>*>
data[j] = temp; 6(ER$
} k(@W z>aCv
} '#Do( U'