[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; T~=r*4
} ?_hKhn%K9
int i1=l; )83UF r4kP
int i2=mid+1; <m") 2dJ
for(int cur=l;cur<=r;cur++){ ?\_\pa/+
if(i1==mid+1) }cl~Vo-mp
data[cur]=temp[i2++]; eN]AJ%Ig
else if(i2>r) 8 K7.; t1
data[cur]=temp[i1++]; '*`25BiQ
else if(temp[i1] data[cur]=temp[i1++]; "t[9EbFL
else >gQJ6q
data[cur]=temp[i2++]; }@+3QHwYU
} N*vBu`
} ]Tv0+ Ao
S!\4,6
} ^T^l3B[
:K-05$K
改进后的归并排序: U/9i'D[|{
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package org.rut.util.algorithm.support; 5"5tY
%3"xn!'vf
import org.rut.util.algorithm.SortUtil; kPuY[~i%
pQ:7%+Om
/** y;'yob
* @author treeroot i.O670D
* @since 2006-2-2 A>C&`A=-
* @version 1.0 U04TVQn`
*/ j<BW/
public class ImprovedMergeSort implements SortUtil.Sort { U-b(
PTt#Ixn,
private static final int THRESHOLD = 10; @e`%'
.mr&zq
/* J(0E'o{ug
* (non-Javadoc) 2 %`~DVo
* Bf)}g4nYn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :TPT]q d@
*/ j@7%%
public void sort(int[] data) { q?&Ap*
int[] temp=new int[data.length]; &oU) ,H
mergeSort(data,temp,0,data.length-1); B^;G3+}
} "L?h@8sa
o7_*#5rD
private void mergeSort(int[] data, int[] temp, int l, int r) { -k4w$0)
int i, j, k; BVJ6U[h`
int mid = (l + r) / 2; 5mtsN#
if (l == r) D7X8yv1
return; &3@{?K
if ((mid - l) >= THRESHOLD) IdHydY1
mergeSort(data, temp, l, mid); PG51+#
else 9)y7K%b0
insertSort(data, l, mid - l + 1); ){D6E9
if ((r - mid) > THRESHOLD) JY5)^<.d
mergeSort(data, temp, mid + 1, r); ~!t#M2Sk
else E~4d6~s
insertSort(data, mid + 1, r - mid); ?j'Nx_RoX
Ht{Q=w/9
for (i = l; i <= mid; i++) { <6!;mb ;cX
temp = data; ApT8;F B
} h?8I`Z)h
for (j = 1; j <= r - mid; j++) { u0o}rA
temp[r - j + 1] = data[j + mid]; %z9lCTmy
} $u ae8h
int a = temp[l]; >e'Hz(~'/
int b = temp[r]; 4~s{zob
for (i = l, j = r, k = l; k <= r; k++) { :kQ%Mj>
if (a < b) { b{~64/YJ
data[k] = temp[i++]; \H^A@f
a = temp; o(gEyK
} else { \#yKCA';
data[k] = temp[j--]; =x &"aF1
b = temp[j]; {E 'go]
} hOOkf mOM
} ?"+g6II
} cZb5h 9
p%ve1>c
/** VR'R7
* @param data GR%h3HO2&
* @param l XCo3pB Wq~
* @param i VZhHO d
*/ d~|/LR5
private void insertSort(int[] data, int start, int len) { 8:9/RL\"x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qm(KvL5
} i".nnAI:
} T4c]VWtD
} +46m~" ]
} F%-KY$%
iXgy/>qgT
堆排序： e`7dRnx&0
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package org.rut.util.algorithm.support; ~MpcVI_K
?=FRnpU?
import org.rut.util.algorithm.SortUtil; r@30y/C
a,/wqX
/** Dt ~3Qd0
* @author treeroot rGqT[~{t
* @since 2006-2-2 ]di^H>,xU
* @version 1.0 4WAs_~
*/ ^*$lCUv8p
public class HeapSort implements SortUtil.Sort{ > &VY
I'%\ E,
/* (non-Javadoc) x%`.L6rj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \F; S
*/ 5bZjW~d
public void sort(int[] data) { e,X{.NS
MaxHeap h=new MaxHeap(); R'z -#*[
h.init(data); ir?Y>
for(int i=0;i h.remove(); =qNZ7>Qw
System.arraycopy(h.queue,1,data,0,data.length); o9JZ-biH
} Rf4}4ixkj
j@guB:0
private static class MaxHeap{ d1{%z\u a
ExW3LM9(
void init(int[] data){ Vz\?a8qQ<
this.queue=new int[data.length+1]; +\ZaVi
for(int i=0;i queue[++size]=data; !iHJ!
fixUp(size); Z37%jdr
} D|gI3i
} |bM?Q$>~
S [=l/3c
private int size=0; T1_qAz+
ssUm1F\
private int[] queue; \Um &
O={ ?c1i:
public int get() { GEGg S&SM
return queue[1]; F8*zG 4/&
} xC5`|JW
(oG-h"^/
public void remove() { G?e\w+}Pj@
SortUtil.swap(queue,1,size--); qy^sdqHl@
fixDown(1); 92";?Xk
} fnJ!~b*qo
file://fixdown `9vCl@"IV
private void fixDown(int k) { WWtksi,
int j; Cu,#w3JR
while ((j = k << 1) <= size) { #^zUaPV 7r
if (j < size %26amp;%26amp; queue[j] j++; fEYo<@5c]
if (queue[k]>queue[j]) file://不用交换 |K11Woii
break; sI% =G3o=
SortUtil.swap(queue,j,k); ?>}&,:U}
k = j; MVYf-'\^
} Pf?zszvs
} h;RKF\U:"
private void fixUp(int k) { (q+EP(Q
while (k > 1) { `/+PZqdC
int j = k >> 1; QP={b+8
if (queue[j]>queue[k]) '>aj5tZ>R
break; vq_v;$9}
SortUtil.swap(queue,j,k); cq,8^o&
k = j; <ZwmXD.VD
} Rct=vDU
} zjlo3=FQX[
.G/2CVMj
} ,nnVHBN
=L F9im
} +}-Ecr
,2/y(JX}*!
SortUtil： %7n(>em
slRD /
package org.rut.util.algorithm; iL\eMa
<`Q*I Y
import org.rut.util.algorithm.support.BubbleSort; n^+rxG6L
import org.rut.util.algorithm.support.HeapSort; [KT1.5M[
import org.rut.util.algorithm.support.ImprovedMergeSort; jC3)^E@:"
import org.rut.util.algorithm.support.ImprovedQuickSort; 8r-'m%l
import org.rut.util.algorithm.support.InsertSort; <}z,!w8
import org.rut.util.algorithm.support.MergeSort; TQiDbgFo
import org.rut.util.algorithm.support.QuickSort; {klyVb
import org.rut.util.algorithm.support.SelectionSort; z&W5@6")`
import org.rut.util.algorithm.support.ShellSort; o0`|r+E\
k,M%"FLQ
/** |j>fsk~
* @author treeroot f!D~aJ
* @since 2006-2-2 'du{ky
* @version 1.0 U%zZw)
*/ oHvVZ
public class SortUtil { $9In\x
public final static int INSERT = 1; \Bg?QhA_D
public final static int BUBBLE = 2; `xm4?6
public final static int SELECTION = 3; `GQ'yv
public final static int SHELL = 4; Qf<@ :T*
public final static int QUICK = 5; r-]HmY x
public final static int IMPROVED_QUICK = 6; [;*Vm0>t
public final static int MERGE = 7; 4&a,7uVer
public final static int IMPROVED_MERGE = 8; gsD0N^
public final static int HEAP = 9; aa10vV
j+-+<h/(
public static void sort(int[] data) { }3xZ`vX[T
sort(data, IMPROVED_QUICK); %yJ $R2%*y
} <-%OXEG
private static String[] name={ 7$HN5T\!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P3u,)P&
}; 1~_&XNb&
w=K!U]
private static Sort[] impl=new Sort[]{ tMnwY'
new InsertSort(), " +n\0j;
new BubbleSort(), @!MhVNS_<
new SelectionSort(), /'uFX,
new ShellSort(), SPEDN}/^
new QuickSort(), [ta3sEPjs
new ImprovedQuickSort(), @ApX43U(
new MergeSort(), ),#hBB`ZA
new ImprovedMergeSort(), @2eV^eO9
new HeapSort() tMQz'3,X
}; Qk_`IlSd
$Afw]F$
public static String toString(int algorithm){ [tEHr
return name[algorithm-1]; %J%ZoptY:
} #Emz9qTsce
o7B}~;L
public static void sort(int[] data, int algorithm) { @*{sj`AS '
impl[algorithm-1].sort(data); F>!gwmn~
} Mq[|w2.
<6L=% \X{*
public static interface Sort { 1;$8=j2
public void sort(int[] data); $,v[<T`
} !(L\X'jH
g-cC&)0Q
public static void swap(int[] data, int i, int j) { irRe}
int temp = data; e9e7_QG_-
data = data[j]; $GcVI;a
data[j] = temp; LsGu-Y5^
} g3"eEg5NY
} e_{!8u.+