[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; fKkS_c 2
} 9$ixjkIg
int i1=l; c`UizZ
int i2=mid+1; =_$Hn>vO
for(int cur=l;cur<=r;cur++){ 4SIS#m
if(i1==mid+1) ^aqBL
data[cur]=temp[i2++]; O}z-g&e.U
else if(i2>r) AZ. j>+0xx
data[cur]=temp[i1++]; F{eI[A
else if(temp[i1] data[cur]=temp[i1++]; VP }To
else A ?[Wfq|
data[cur]=temp[i2++]; C)&BtiUN/
} fHgvh&FU
} CeUC[cUQU
!dwa. lZ&X
} WFfn:WSWU
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改进后的归并排序: l(Uwci
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package org.rut.util.algorithm.support; pvdCiYo1r
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import org.rut.util.algorithm.SortUtil; /!pJ"@
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/** CH0Nkf
* @author treeroot j HEt
* @since 2006-2-2 m :2A[H+
* @version 1.0 q]Af I(
*/ D1wONss
public class ImprovedMergeSort implements SortUtil.Sort { {Ok]$0L
-=2V4WU~
private static final int THRESHOLD = 10; $g }aH(vf
V17!~
/* Eu[/* t+l
* (non-Javadoc) 4 udW6U
* qy/t<2'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wfsd$kN6{
*/ be HEAQ
public void sort(int[] data) { d_Z?i#r0l
int[] temp=new int[data.length]; rs0Wy
mergeSort(data,temp,0,data.length-1); lB
} ,-SWrp`f
a-NicjV#
private void mergeSort(int[] data, int[] temp, int l, int r) { V=H:`n3k
int i, j, k; Bm+Ca:p%
int mid = (l + r) / 2; +?6@%mW'
if (l == r) Bk/&H-NI
return; Fzy5k?R
if ((mid - l) >= THRESHOLD) q!YAA\'31
mergeSort(data, temp, l, mid); Fm[3Btn
else ]3L/8]:
insertSort(data, l, mid - l + 1); MAL;XcRR
if ((r - mid) > THRESHOLD) `ix&j8E22w
mergeSort(data, temp, mid + 1, r); n]jw!;
else z2 mjm
insertSort(data, mid + 1, r - mid); `r&]Ydu:
vywpX^KPv
for (i = l; i <= mid; i++) { 9<5S!?JL
temp = data; pL2{zW`FDh
} nPUD6<bF
for (j = 1; j <= r - mid; j++) { #cqI0ny?G
temp[r - j + 1] = data[j + mid]; I MG^L
} NJg )S2]7
int a = temp[l]; 4-oaq'//BT
int b = temp[r]; mTLJajE/
for (i = l, j = r, k = l; k <= r; k++) { ]$I}r= Em
if (a < b) { /z: mi
data[k] = temp[i++]; =G`g-E2
a = temp; 8"o@$;C
} else { W@D./Th
data[k] = temp[j--]; _P*QX
b = temp[j]; wv^n#
} ~,.;2K73
} #g<6ISuf
} tNz(s)
Sv!JA#Ag
/** ==EB\>g|
* @param data 4u#TKr.
* @param l H^M>(kT#&
* @param i @I#uv|=N
*/ P+DIo7VTX
private void insertSort(int[] data, int start, int len) { dj{~!}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0!M'z
} >+):eBL
} T@a|*.V
} z#2n+hwE
} |^"0bu"
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堆排序： ,(NN)Oj
h=B= J
package org.rut.util.algorithm.support; >~_)2_j
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import org.rut.util.algorithm.SortUtil; aP#/%
Q"H/RMo-
/** I:("f+ H
* @author treeroot z, n[}Q#u
* @since 2006-2-2 hw=~%f;
* @version 1.0 tTWEhHQ`
*/ 'UM *7
public class HeapSort implements SortUtil.Sort{ d{Owz&PL
A#Y:VavQ?
/* (non-Javadoc) OsKtxtLO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [pInF Qh6
*/ &0xM 2J
public void sort(int[] data) { dg_w$#
MaxHeap h=new MaxHeap(); 9*r^1PRc
h.init(data); cZ#%tT#
for(int i=0;i h.remove(); F6aC'<#/
System.arraycopy(h.queue,1,data,0,data.length); KtGbpcS$f
} !;0K=~(Y^
l2I%$|)d
private static class MaxHeap{ 1xInU_SPf
#/{3qPN?@
void init(int[] data){ BvUiH<-D
this.queue=new int[data.length+1]; Y=5P=wE
for(int i=0;i queue[++size]=data; 3 FV -&Y
fixUp(size); F~eY'~&H}
} -+0kay%
} $m A2AI
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private int size=0; <>728;/C
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private int[] queue; na"!"C s3
T"<)B^8f
public int get() { 7Gy:T47T\@
return queue[1]; 'u~0rMe4})
} J_?v=dW`
:Qhrh(i
public void remove() { b'Km-'MtH
SortUtil.swap(queue,1,size--); "p7nngn~
fixDown(1); y G3aF(
} B{*{9!(l9
file://fixdown Gr#3GvL
private void fixDown(int k) { u@CQ+pnf:(
int j; gd*2*o$g(
while ((j = k << 1) <= size) { :2K@{~8r
if (j < size %26amp;%26amp; queue[j] j++; " m13HS
if (queue[k]>queue[j]) file://不用交换 keFH CC
break; 2t PfIg
SortUtil.swap(queue,j,k); h9/fD5
k = j; "%p7ft
} T^(> 8/O
} L#zD4L
private void fixUp(int k) { P-3f51Q
while (k > 1) { =1@LMIi5x
int j = k >> 1; EC 1|$Co
if (queue[j]>queue[k]) 6|~^P!&
break; 9\c]I0)3p
SortUtil.swap(queue,j,k); -Jw4z#/-
k = j; ,[)l>!0\H
} ~?FhQd\Q
} gn&Zt}@[
)BvMFwQG
} Hf\sF(, (
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} +@~WKa
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SortUtil： |<5F08]v
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package org.rut.util.algorithm; *mbzK*
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import org.rut.util.algorithm.support.BubbleSort; }YVF fi~
import org.rut.util.algorithm.support.HeapSort; S0QLM)
import org.rut.util.algorithm.support.ImprovedMergeSort; ml<tH2Qx3C
import org.rut.util.algorithm.support.ImprovedQuickSort; .Z 67
import org.rut.util.algorithm.support.InsertSort; y^ |u'XK
import org.rut.util.algorithm.support.MergeSort; ],k~t5+
import org.rut.util.algorithm.support.QuickSort; 7eAV2.
import org.rut.util.algorithm.support.SelectionSort; 9@yF7
import org.rut.util.algorithm.support.ShellSort; sRA2O/yKCE
U3Z=X TB
/** t ^[fu,
* @author treeroot m|F1_Ggz
* @since 2006-2-2 ^6z"@+;*
* @version 1.0 =$fz</S=J
*/ KmTFJ,iM
public class SortUtil { ,w3-*z
public final static int INSERT = 1; qz{9ND|)
public final static int BUBBLE = 2; M/dgW`c
public final static int SELECTION = 3; @uldD"MJ<]
public final static int SHELL = 4; [ 'lu;1-,
public final static int QUICK = 5; vg1JN"S[
public final static int IMPROVED_QUICK = 6; r PK.Q)g
public final static int MERGE = 7; !*Eu(abD
public final static int IMPROVED_MERGE = 8; \yC/OLXq
public final static int HEAP = 9; 7J!s"|VS
W(R~K -
public static void sort(int[] data) { &29jg_'W
sort(data, IMPROVED_QUICK); | @$I<
} ao"2kqa)r
private static String[] name={ 6Eu(C]nC(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PXkpttIE]M
}; h]s~w
PPr Pj^%z=
private static Sort[] impl=new Sort[]{ UZ2_FP
new InsertSort(), YLGE{bS
new BubbleSort(), kuD$]A Q`&
new SelectionSort(), ,1#? 0q
new ShellSort(), LwK]fFtu
new QuickSort(), @,TIw[p
new ImprovedQuickSort(), jD6HCIjd'
new MergeSort(), ]i$y;]f
new ImprovedMergeSort(), :sJ7Wok6~
new HeapSort() YE~IO5
}; 2cH RiRT
gTXpaB<
public static String toString(int algorithm){ A5TSbW']+5
return name[algorithm-1]; abQ.N
} {tUe(
t]@>kAA>2L
public static void sort(int[] data, int algorithm) { j<*7p:L7_>
impl[algorithm-1].sort(data); }7[]d7
} dAx ? ,
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public static interface Sort { (.cA'f?h
public void sort(int[] data); r|u[36NmA
} zR?R,k)m
jRU:un4
public static void swap(int[] data, int i, int j) { 6dR+qJa6i
int temp = data; >5Yn`Fc5
data = data[j]; $t):r@L
data[j] = temp; Y~g{9 <!
} XNWtX-[^@
} eTvWkpK+