[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; E Uar/
} -5>-%13
int i1=l; G'zF)0oD
int i2=mid+1; ;VO.!5W@eg
for(int cur=l;cur<=r;cur++){ rdnno
if(i1==mid+1) ;?}l
data[cur]=temp[i2++]; XS0xLt=
else if(i2>r) )4?x5#
data[cur]=temp[i1++]; 0yx3OY
else if(temp[i1] data[cur]=temp[i1++]; +#b:d=v!
else 0U/K7sZ
data[cur]=temp[i2++]; 6ZgU"!|r
} Nfe>3uQK
} 1CPjil*eb
.,~(%#Wl$
} $wYtyN[
)2UZ% ?V#
改进后的归并排序: IvpcSam'
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package org.rut.util.algorithm.support; 1iL'V-y
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import org.rut.util.algorithm.SortUtil; Ov-b:lH
2nb:)
/** O=)
* @author treeroot 1[*UYcD
* @since 2006-2-2 wpA`(+J
* @version 1.0 SxyONp.$\
*/ wiOgyMdx
public class ImprovedMergeSort implements SortUtil.Sort { Q "oI])r
&`Y!;@K9W#
private static final int THRESHOLD = 10; 2;L|y._`w
y5= `ap
/* /$n ~lf
* (non-Javadoc) %or,{mmiM:
* @4%L36k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m6eZ_&+u
*/ FZd.L6q
public void sort(int[] data) { ej&<GM|
int[] temp=new int[data.length]; WqxUXH
mergeSort(data,temp,0,data.length-1); :ztr)
} )Fd HV;K
dAP|:&y@
private void mergeSort(int[] data, int[] temp, int l, int r) { E'1+Yq
int i, j, k; s#h8%['
int mid = (l + r) / 2; k&#a\OJ7u
if (l == r) s57N) 0kP
return; @L84>3O
if ((mid - l) >= THRESHOLD) #6+FY+/
mergeSort(data, temp, l, mid); rA0,`}8\
else N-lGa@ j
insertSort(data, l, mid - l + 1); 6*9}4`
if ((r - mid) > THRESHOLD) h:XzUxL\
mergeSort(data, temp, mid + 1, r); 8,?v?uE
else -3Avs9`5
insertSort(data, mid + 1, r - mid); [LT^sb
IM=bK U
for (i = l; i <= mid; i++) { 0Q1FL MLV
temp = data; @RD+xYm
} #5sD{:f`
for (j = 1; j <= r - mid; j++) { bLz*A-
temp[r - j + 1] = data[j + mid]; kH*Pn'
} 3`hUo5K
int a = temp[l]; yTE%hHH]&[
int b = temp[r]; aYL|@R5;e
for (i = l, j = r, k = l; k <= r; k++) { KDi|(
if (a < b) { |( (zTf
data[k] = temp[i++]; {"*VU3%q
a = temp; ZA~Z1Mro#"
} else { {-9jm%N
data[k] = temp[j--]; Y**|N8e
b = temp[j]; a\kb^D=T
} v/uO&iQw5
} Ot&:mT!2
} 8$xPex~2
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/** W#_/ak$uF*
* @param data |sqZ$Mu
* @param l @e~]t}fH
* @param i 5OM?3M
*/ >YW\~T
private void insertSort(int[] data, int start, int len) { /4=-b_2Y~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pl*~kG=
} -9P2`XQ^
} sfp,Lq`
} O(2cWQ
} NX* O_/
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堆排序： Mro4`GL
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package org.rut.util.algorithm.support; E ?2O(
[y)FcIK}
import org.rut.util.algorithm.SortUtil; ;'T{li2
oR+-+-??$
/** &znH!AQ0
* @author treeroot 9V1cdb~?"T
* @since 2006-2-2 BJjx|VA+
* @version 1.0 z,;;=V6j
*/ =Je>`{J
public class HeapSort implements SortUtil.Sort{ 9G?ldp8
7D"%%|: h
/* (non-Javadoc) / YiQ\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r >{G`de4
*/ dLh6:Gh8_I
public void sort(int[] data) { `linG1mF
MaxHeap h=new MaxHeap(); 8"'x)y
h.init(data); '3tw<k!1{.
for(int i=0;i h.remove(); XaI;2fMGI
System.arraycopy(h.queue,1,data,0,data.length); ;uI~BV*3
} $Ptk|qFe
W+>wu%[L
private static class MaxHeap{ BW[5o3 i
=y ]Jl,_.
void init(int[] data){ mxTk+j=
this.queue=new int[data.length+1]; Ry;$^.7%
for(int i=0;i queue[++size]=data; Q ~|R Z7G
fixUp(size); O_@2;iD^^
} T(X:Yw
} GrEs1M1]*
sPYX~G&T
private int size=0; Ayx^Wp*s
pck>;V
private int[] queue; QezSJ io
@98;VWY\
public int get() { H>7dND2;
return queue[1]; kN9yO5h7
} ,krS-.
uK*|2U6t
public void remove() { Dk)}|GJ()"
SortUtil.swap(queue,1,size--); =WZ%H_oxi
fixDown(1); 6k0^x Q
} % +Pl+`?E
file://fixdown e29y7:)c=
private void fixDown(int k) { VC&c)X
int j; ^tAO_~4
while ((j = k << 1) <= size) { AY2:[ 5cm
if (j < size %26amp;%26amp; queue[j] j++; \^532FIw6
if (queue[k]>queue[j]) file://不用交换 NGzgLSm\
break; ))#'4
SortUtil.swap(queue,j,k); TYS\95<
k = j; W^g'}}]T
} _g|acBF
} M=!i>(yG
private void fixUp(int k) { T{MC-j _T9
while (k > 1) { 4I~i)EKy6
int j = k >> 1; M]_E
if (queue[j]>queue[k]) D5]{2z}k
break; iLq#\8t^
SortUtil.swap(queue,j,k); lglYJ,
k = j; I lG:X)V%
} ziL^M"~2
} BA+_C]%ZJ
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} us{nyil1
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} WR.x&m>
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SortUtil： mN1Ssq"B
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package org.rut.util.algorithm; 8OAg~mQ15(
H~9=&p[Q
import org.rut.util.algorithm.support.BubbleSort; vZjZb(jlN
import org.rut.util.algorithm.support.HeapSort; : }?{@#Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ZlR!s!vv
import org.rut.util.algorithm.support.ImprovedQuickSort; Aka^e\Y@6*
import org.rut.util.algorithm.support.InsertSort; womq^h6
import org.rut.util.algorithm.support.MergeSort; R_e)mkE
import org.rut.util.algorithm.support.QuickSort; g()m/KS<
import org.rut.util.algorithm.support.SelectionSort; "EPD2,%S
import org.rut.util.algorithm.support.ShellSort; HhSjR%6HY;
}p'8w\C$
/** =7jEz+w#
* @author treeroot l1-HO
* @since 2006-2-2 qi=3L
* @version 1.0 :c4kBl%gJ
*/ kV)'a
public class SortUtil { Fj=NiZ=
public final static int INSERT = 1; 0'yyfz
public final static int BUBBLE = 2; U"5q;9#q
public final static int SELECTION = 3; rihlae5Kz
public final static int SHELL = 4; tV`&-H
public final static int QUICK = 5; Pz473d
public final static int IMPROVED_QUICK = 6; {'~sS
public final static int MERGE = 7; ,IjdO(?TC
public final static int IMPROVED_MERGE = 8; o/JPYBhdl
public final static int HEAP = 9; g_ M-F
6E+=Xi
public static void sort(int[] data) { &BgU:R,
sort(data, IMPROVED_QUICK); ,P@QxnQ
} ?0J0Ij,
private static String[] name={ Zoow*`b|$U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gMZ&,n4
}; u%opY<h
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private static Sort[] impl=new Sort[]{ i$O#%12l
new InsertSort(), XiG88Kwv
new BubbleSort(), <xF?~7
new SelectionSort(), `pYE[y+
new ShellSort(), N(R,8GF5G
new QuickSort(), 3 jh|y,
new ImprovedQuickSort(), ,OB&nN t>
new MergeSort(), Nmf#`+7gCI
new ImprovedMergeSort(), <nA3Sd"QfV
new HeapSort() AQ}l%
}; l<RfRqjw
\Da~p9T&
public static String toString(int algorithm){ SJ(9rhB5*.
return name[algorithm-1]; {HuLuP0t
} @,vv\M0)p
OK\]*r
public static void sort(int[] data, int algorithm) { nHU3%%%cU
impl[algorithm-1].sort(data); Y n>{4BZ>#
} 6D^%'[4t
r}@< K
public static interface Sort { ~7BX@?
public void sort(int[] data); 1UyH0`&
} Fe4esg-B<
w4}(Ab<Y
public static void swap(int[] data, int i, int j) { ~~dfpW_"
int temp = data; IMR$x(g= F
data = data[j]; nO [QcOf
data[j] = temp; nDn{zea7
} KgU[
} YPQCOG