[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; N`Xnoehu
} *Z`eNz}
int i1=l; N#)VD\m
int i2=mid+1; G`#gV"PlC
for(int cur=l;cur<=r;cur++){ 4_%FSW8-
if(i1==mid+1) CDYx/yO
data[cur]=temp[i2++]; uHro%UAd
else if(i2>r) ^X;Xti
data[cur]=temp[i1++]; ~fp+@j-A
else if(temp[i1] data[cur]=temp[i1++]; 3t8H?B12ow
else /Z " 4[
data[cur]=temp[i2++]; O|&TL9:
} D Ok^ON
} aaugu.9
I!7.fuO
} W:poUG1UR
!(_xu{(DL
改进后的归并排序: K2rS[Kdfaq
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package org.rut.util.algorithm.support; `VFl|o#H
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import org.rut.util.algorithm.SortUtil; iB3+KR
f5b`gvCY,#
/** pd>a6 lI`
* @author treeroot ~R@m!'Ik
* @since 2006-2-2 :/[YY?pg-
* @version 1.0 N^yO- xk
*/ KHus/M&0
public class ImprovedMergeSort implements SortUtil.Sort { @*"<U]
/-YlC(kL
private static final int THRESHOLD = 10; /N]Ow
&#oZ>`Qu
/* )4)iANH?
* (non-Javadoc) `;qv}
* xFm{oJ!]&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C$RAJ
*/ Omh&)|Iql
public void sort(int[] data) { Fl+tbF
int[] temp=new int[data.length]; ]t*P5
mergeSort(data,temp,0,data.length-1); FV6he[,
} 7k t7^V<
ua|Z`qUyq
private void mergeSort(int[] data, int[] temp, int l, int r) { Xf_tj:eO~
int i, j, k; x\bRj>%(
int mid = (l + r) / 2; W8yfa[z~J
if (l == r) ;Q>3N(
return; W3V{Xk|
if ((mid - l) >= THRESHOLD) LYy:IBI7_
mergeSort(data, temp, l, mid); T3t~=b>&L
else Ul713Bjz
insertSort(data, l, mid - l + 1); {8Jk=)(md
if ((r - mid) > THRESHOLD) <#p|z`N
mergeSort(data, temp, mid + 1, r); =7]Q6h@X
else aBVEk2 p
insertSort(data, mid + 1, r - mid); 3@F+E\k
c7l!G~yx'
for (i = l; i <= mid; i++) { So\|Ye
temp = data; X|damI%
} !Zyx$2K
for (j = 1; j <= r - mid; j++) { y|+~>'^JR
temp[r - j + 1] = data[j + mid]; p]V-<
} [%iUg\'7d
int a = temp[l]; ^Q)gsJY|I
int b = temp[r]; -90ZI1O`
for (i = l, j = r, k = l; k <= r; k++) { F%_,]^ n[
if (a < b) { 3n84YX{
data[k] = temp[i++]; zsMw5C
a = temp; Fy_<Ui
} else { p[@oF5M
data[k] = temp[j--]; _KM$u>B8
b = temp[j]; hKH$AEHEU}
} ^0-e,d 9h
} sPE)m_u
} emkMR{MY
bDZKQ&
/** D=82$$
* @param data RdvPsv}D
* @param l \+?,c\x
* @param i S1az3VJI\
*/ 8MeO U
private void insertSort(int[] data, int start, int len) { .i3lG( YG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KXx@ {cv
} PQ&Q71
} "x.6W!
} C{`^9J-
} 2iR:*}5
[aWDD[#j~
堆排序： 5&-j{J0iV
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package org.rut.util.algorithm.support; *_{l
5v!DYx
import org.rut.util.algorithm.SortUtil; ]w_
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/** ER;lkF`RF
* @author treeroot /H%<oAjp6
* @since 2006-2-2 3I;xU(rv
* @version 1.0 a*W_fxb
*/ %<=w[*i
public class HeapSort implements SortUtil.Sort{ .o\;,l2
da9*9yN
/* (non-Javadoc) (pT(&/\8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) co$Hi9JE
*/ z|G|Y 22
public void sort(int[] data) { }rKJeOo^x?
MaxHeap h=new MaxHeap(); E~<(i':
h.init(data); d-ag
for(int i=0;i h.remove(); un$ Z7W/
System.arraycopy(h.queue,1,data,0,data.length); T1Gp$l
} GCP{Z]u
[xZ/ZWb/
private static class MaxHeap{ C-a*EG
aDN6MZM
void init(int[] data){ B@"SOX
this.queue=new int[data.length+1]; kW<Yda<a
for(int i=0;i queue[++size]=data; pBg|n=^
fixUp(size); b"R, p=M
} 5#TrCPi6A
} KdOh'OrT9.
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private int size=0; H9Y2n 0
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private int[] queue; D4=..;
IdV,%d{
public int get() { ,YP1$gj
return queue[1]; "<PoJPh
} [):{5hMA
97qtJ(ESI
public void remove() { J{Y6fHFi
SortUtil.swap(queue,1,size--); IgPV#
fixDown(1); V-D}U$fw
} 05l0B5'p
file://fixdown Xmap9x
private void fixDown(int k) { Q vv\+Jp^
int j; p3M#XC_H]
while ((j = k << 1) <= size) { rxs~y{Xi
if (j < size %26amp;%26amp; queue[j] j++; Z&+NmOY4
if (queue[k]>queue[j]) file://不用交换 /v}P)&
break; zuC58B
SortUtil.swap(queue,j,k); XKz;o^1a^
k = j; )z2|"Lp
} 5y1or
} kq)+@p
private void fixUp(int k) { 1s{ISWm
while (k > 1) { u @{E{
int j = k >> 1; pY+.SuM
if (queue[j]>queue[k]) 7ei>L]gm%
break; Q!4i_)rM
SortUtil.swap(queue,j,k); ${A5-
k = j; `3f_d}b
} -Z:]<;qU
} /6+1{p
!cq=)xR
} "C_T]%'Wm
!GlnQ`T
} 5x*5|8
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SortUtil： ksB
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package org.rut.util.algorithm; SQq6X63 \
1^Kj8*O8e
import org.rut.util.algorithm.support.BubbleSort; Yw6DJY
import org.rut.util.algorithm.support.HeapSort; 6B7<
import org.rut.util.algorithm.support.ImprovedMergeSort; 1vB-M6(
import org.rut.util.algorithm.support.ImprovedQuickSort; eq^TA1>T
import org.rut.util.algorithm.support.InsertSort; vS7/~:C
import org.rut.util.algorithm.support.MergeSort; C>*5=p|T
import org.rut.util.algorithm.support.QuickSort; 6-mmi7IfO
import org.rut.util.algorithm.support.SelectionSort; DRH'A!r!
import org.rut.util.algorithm.support.ShellSort; =?=)s
^y:FjQC:
/** T?W[Z_D
* @author treeroot nqZA|-}
* @since 2006-2-2 W3^zIj
* @version 1.0 `d75@0:
*/ c5X`_
public class SortUtil { q:vz?G
public final static int INSERT = 1; 1*Sr5N[=
public final static int BUBBLE = 2; . _1jk
public final static int SELECTION = 3; g d z
public final static int SHELL = 4; ;*y|8od B
public final static int QUICK = 5; RXGHD19]
public final static int IMPROVED_QUICK = 6; 6!ZVd#OM%
public final static int MERGE = 7; \.c]kG>k-
public final static int IMPROVED_MERGE = 8; M6J/mOVx5
public final static int HEAP = 9; zL9VR;q
~}h^38
public static void sort(int[] data) { ~_'0]P\
sort(data, IMPROVED_QUICK); q\a[S*
} KR&s?
private static String[] name={ dSwm|kIa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J#0GlK@"
}; 2< p{z
I^WIa"u_
private static Sort[] impl=new Sort[]{ fs&,w
new InsertSort(), ]\OWZ{T'j
new BubbleSort(), W@l+ciZ_
new SelectionSort(), 3@&bxYXm
new ShellSort(), ;SfNKu
new QuickSort(), U);OR
new ImprovedQuickSort(), 4py(R-8\
new MergeSort(), 1 ojhh7<
new ImprovedMergeSort(), 9u?(^(.
new HeapSort() L59bu/LfL
}; ,!`SY)
#e*X0;m
public static String toString(int algorithm){ Ejq=*UOP
return name[algorithm-1]; ]$3+[9x'
} mV<i JZh
CoJ55TAW
public static void sort(int[] data, int algorithm) { Yrpxy.1=F5
impl[algorithm-1].sort(data); 'V&2Xvl%
} 7U,k 2LS
\yM-O-{
public static interface Sort { )7W6-.d
public void sort(int[] data); ;;@IfZ ?j
} l<TIG3bs
K'NcTw#f
public static void swap(int[] data, int i, int j) { aM), M]m[
int temp = data; cqEHYJ;B
data = data[j]; S."7+g7Ar
data[j] = temp; I0DM=V>;
} hm3jpWi8
} r=qLaPG