[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; \~wMfP8
} $ocdI5
int i1=l; M',?u
int i2=mid+1; klhtKp_p
for(int cur=l;cur<=r;cur++){ 2Tppcj v
if(i1==mid+1) [2cD:JL
data[cur]=temp[i2++]; FpU>^'2]
else if(i2>r) j] [,J49L
data[cur]=temp[i1++]; q@2siI~W
else if(temp[i1] data[cur]=temp[i1++]; c&Q$L }
else /Z4et'Lo
data[cur]=temp[i2++]; ?aMOZn?
} d/@,@8:
} <OPArht
L}NSR
} }<:}XlwT%
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改进后的归并排序: ,2ar7 5Va
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package org.rut.util.algorithm.support; C7AUsYM
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import org.rut.util.algorithm.SortUtil; 9N3eN
gQ.Sa j $
/** kcxAd
* @author treeroot x,Vr=FB
* @since 2006-2-2 kU`r)=1"
* @version 1.0 2J;g{95z
*/ /Ci<xmP
public class ImprovedMergeSort implements SortUtil.Sort { ;A[Q2(w+
@KAI4LP
private static final int THRESHOLD = 10; Kc(FX%3LU
0m ? )ROaJ
/* :BTq!>s
* (non-Javadoc) syK^<xa
* TS5Q1+hWHV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3R VR
*/ cM7[_*Ot<m
public void sort(int[] data) { rrv%~giU
int[] temp=new int[data.length]; LOJAWR9$^U
mergeSort(data,temp,0,data.length-1); [ikOb8 G#
} <of^AKbt
Y6d@h? ht
private void mergeSort(int[] data, int[] temp, int l, int r) { vr^qWn
int i, j, k; 0ZO2#>gh$
int mid = (l + r) / 2; Du){rVY^d
if (l == r) sx<%2
return; %~S&AE-
if ((mid - l) >= THRESHOLD) t |oR7qa{w
mergeSort(data, temp, l, mid); ;*&-C9b
else Yz<1 wt7;
insertSort(data, l, mid - l + 1); @s^-.z
if ((r - mid) > THRESHOLD) RpYERAgT
mergeSort(data, temp, mid + 1, r); o _H`o&xr
else @\I#^X5lv
insertSort(data, mid + 1, r - mid); pb=h/8R
f y8Uk;
for (i = l; i <= mid; i++) { *uvQ\.
temp = data; TuqH*{NNy9
} FC"8#*x
for (j = 1; j <= r - mid; j++) { _wL BA^d^
temp[r - j + 1] = data[j + mid]; WMg~Y"W
} lb1Xsgm{
int a = temp[l]; 2f_:v6
int b = temp[r]; s"?3]P
for (i = l, j = r, k = l; k <= r; k++) { sn>~O4"
if (a < b) { }:#P)8/v>%
data[k] = temp[i++]; =mmWl9'mJ
a = temp; b<u3 hln%,
} else { HUOj0T
data[k] = temp[j--]; xn|(9#1o
b = temp[j]; #cLBQJq
} N)>ID(}F1
} 5NLDYi@3
} {kAc(
jlg(drTo
/** L4?IHNB
* @param data 5rUdv}.
* @param l .3!1`L3
* @param i @ur+;IK$
*/ k-""_WJ~^
private void insertSort(int[] data, int start, int len) { 7j)8Djzp|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W`*r>`krVJ
} /5AJ.r
} lB[kbJ
} s(roJbJ_;
} 7vj2 `+r.
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堆排序： :p6M=
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package org.rut.util.algorithm.support; FNId;
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import org.rut.util.algorithm.SortUtil; pFz`}?c0
8sK9G` k
/** e<q?e}>?
* @author treeroot eKqk= (
* @since 2006-2-2 q6X1P"%.
* @version 1.0 $xdy&
*/ eQvg7aO;
public class HeapSort implements SortUtil.Sort{ w:l V"]1
5QO9Q]I#_\
/* (non-Javadoc) Jqi%|,/]N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -C&P%tt Y
*/ vgN&K@hJ
public void sort(int[] data) { 0'o:#-
MaxHeap h=new MaxHeap(); w"&n?L
h.init(data); 1ZB"EQ
for(int i=0;i h.remove(); _8agtQ:<
System.arraycopy(h.queue,1,data,0,data.length); $]2vvr
} !_Z&a
R_S.tT!
private static class MaxHeap{ ?#Q #u|~
F^fdIZx
void init(int[] data){ 2T[9f;jM'
this.queue=new int[data.length+1]; $a ` G
for(int i=0;i queue[++size]=data; <yg F(
fixUp(size); &XUiKnNW
} tIS<U(N;
} QnX(V[
*EwR!L*
private int size=0; K)k<Rh[<
VTHH&$ZNq
private int[] queue; s=/v';5J2!
57'4ljvYi
public int get() { 2jCfT>`3
return queue[1]; 7W.~
} H~z`]5CN
PRE|+=w$
public void remove() { 6Sn.I1Wy
SortUtil.swap(queue,1,size--); QUQ'3
fixDown(1); 0}dpK $.
} Tc3yS(aq
file://fixdown # c^z&0B}
private void fixDown(int k) { WvZ8/T'x
int j; }|5Pr(I
while ((j = k << 1) <= size) { c_!cv":s
if (j < size %26amp;%26amp; queue[j] j++; l0i^uMS
if (queue[k]>queue[j]) file://不用交换 "i W"NFO
break; )B8$<sv
SortUtil.swap(queue,j,k); _ZkI)o
k = j; .y:U&Rw4
} \mlqO[ S
} b<gr@WF
private void fixUp(int k) { >!)DM]Ri
while (k > 1) { Jma1N;d
int j = k >> 1; P\)iZiGc
if (queue[j]>queue[k]) l_%6
break; g_COp"!~9
SortUtil.swap(queue,j,k); <dhM\^[
k = j; c6]D-YNFG
} hpL;bM'
} ZLAy- 9^Y
."y1_dDql
} wZZt
Rr|VD@%
} i@M[>~
Y,zxbXZv'5
SortUtil： q{;:SgZ
c=.(!qdH
package org.rut.util.algorithm; l0A&9g*l2
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import org.rut.util.algorithm.support.BubbleSort; SS.dY""89
import org.rut.util.algorithm.support.HeapSort; UFb)AnK
import org.rut.util.algorithm.support.ImprovedMergeSort; 0b(N^$js'
import org.rut.util.algorithm.support.ImprovedQuickSort; K:30_l<
import org.rut.util.algorithm.support.InsertSort; OX\F~+
import org.rut.util.algorithm.support.MergeSort; ;q6Ki.D
import org.rut.util.algorithm.support.QuickSort; "C0Q(dr/n
import org.rut.util.algorithm.support.SelectionSort; b(O3@Q6[
import org.rut.util.algorithm.support.ShellSort; y:qUn!3
7o5BXF
/** V[vl!XM
* @author treeroot fMyti$1~
* @since 2006-2-2 oIj#>1~c%
* @version 1.0 ]}2ZttQ?
*/ '}bgLv
public class SortUtil { ;cN{a&
public final static int INSERT = 1; >[=^_8M
public final static int BUBBLE = 2; 9j:"J` '
public final static int SELECTION = 3; C#Iybg
public final static int SHELL = 4; )gy!GK
public final static int QUICK = 5; HEc+;O1<
public final static int IMPROVED_QUICK = 6; XFV!S#yEZ
public final static int MERGE = 7; ) M BQuiL
public final static int IMPROVED_MERGE = 8; w%BL
public final static int HEAP = 9; M}v/tRI
|64~K\X
public static void sort(int[] data) { YcK|.Mq':
sort(data, IMPROVED_QUICK); =h73s0]
} F;0}x;:>
private static String[] name={ s>n)B^64W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ng>h"H
}; dQR-H7U
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private static Sort[] impl=new Sort[]{ ?]Xpi3k
new InsertSort(), qVwIo.g!
new BubbleSort(), =xx]@
new SelectionSort(), 'qX|jtdM
new ShellSort(), ..'_o~Ka
new QuickSort(), /,Re"!jh
new ImprovedQuickSort(), j+v=Ul|l
new MergeSort(), [!]2djc
new ImprovedMergeSort(), Bad:no\W
new HeapSort() O~K>4ax
}; gi _5?$
` 3K)GA
public static String toString(int algorithm){ EV@X*| w
return name[algorithm-1]; V~;1IQd{
} u-G+ j)
bTs?!~q
public static void sort(int[] data, int algorithm) { yT9@!]^L
impl[algorithm-1].sort(data); i5?q,_
} \%N!5>cZ{
Oh6fj}eK
public static interface Sort { !lc[
public void sort(int[] data); +<3XJ7D
} j@uOOhy
e@* EzvO
public static void swap(int[] data, int i, int j) { RxWVe-Dg
int temp = data; /9pwZ%:<
data = data[j]; !fR3(=oN
data[j] = temp; 6 EC*
} l(tOe
} Z+. '>