[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; *KV^X(/
} >sm~te$5
int i1=l; w,T-vf
int i2=mid+1; g+j\wvx0
for(int cur=l;cur<=r;cur++){ S4S}go*G[
if(i1==mid+1) r@t \a+
data[cur]=temp[i2++]; >rhqhmh;W"
else if(i2>r) 9]L4`.HM
data[cur]=temp[i1++]; o[aP+O Md
else if(temp[i1] data[cur]=temp[i1++]; u5.zckV
else Leu6kPk
data[cur]=temp[i2++]; oA*88c+{f
} SpO%nZ";g8
} 01n7ua*XX
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} 1Y:JGon
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改进后的归并排序: Z!+n/ D-1
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package org.rut.util.algorithm.support; 1rIL[(r4
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import org.rut.util.algorithm.SortUtil; L9]y~[R:
%N#A1
/** 1f+z[ad&^
* @author treeroot :IX_|8e ^
* @since 2006-2-2 ^\oMsU5(
* @version 1.0 &s8vmUt
*/ C14"lB.
public class ImprovedMergeSort implements SortUtil.Sort { 3o2x&v
/[qLf:rGI
private static final int THRESHOLD = 10; #e[S+a
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/* Ofc u4pi
* (non-Javadoc) /pC60y}O0
* 782 oXyD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |;(>q
*/ (GoxiX l
public void sort(int[] data) { jL{k!V`s
int[] temp=new int[data.length]; Bdcs}Ga
mergeSort(data,temp,0,data.length-1); I{$TMkh[
} I.gF38Mx
N^{}Qvrr
private void mergeSort(int[] data, int[] temp, int l, int r) { _oHxpeM
int i, j, k; P\y ZcL
int mid = (l + r) / 2; 0Of6$`
if (l == r) V)fF|E~0
return; GP(nb,
if ((mid - l) >= THRESHOLD) 65vsQ|Zw
mergeSort(data, temp, l, mid); 7*kTu0m
else 7sU+:a
insertSort(data, l, mid - l + 1); qL?$u07<9'
if ((r - mid) > THRESHOLD) FMtg7+Q|>
mergeSort(data, temp, mid + 1, r); C1uV7t*\
else t=\ ffpA
insertSort(data, mid + 1, r - mid); Mn 8| Knh
9JqT"zj
for (i = l; i <= mid; i++) { ]*X z~Ox2
temp = data; #h#_xh'
} bt"5.nm
for (j = 1; j <= r - mid; j++) { Xb~i?T;f
temp[r - j + 1] = data[j + mid]; Elt"tJ
} 9+b){W
int a = temp[l]; tmQ,>
int b = temp[r]; 6st^-L
for (i = l, j = r, k = l; k <= r; k++) { Us\Nmso z
if (a < b) { N[I ?x5:u
data[k] = temp[i++]; (+nnX7V?I
a = temp; vW0U~(XlN
} else { ck$>
data[k] = temp[j--]; :7*9W|e
b = temp[j]; H~?7:K
} On(.(7sNc
} \D-X _.v
} _=9m[
wn.UjxX.
/** \"X_zM
* @param data @ %o'
* @param l !Ld[`d.|R!
* @param i },;Z<(
*/ HOrXxxp1^
private void insertSort(int[] data, int start, int len) { n0)y|B#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y,6KU$G
} ]l"9B'XR
} ";upu
} xg4wtfAbS
} |+Xh ^E
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堆排序： Of-8n-
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package org.rut.util.algorithm.support; Rsx?8Y^5
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import org.rut.util.algorithm.SortUtil; Y}h&dAr
39x 4(
/** O4!!*0(+91
* @author treeroot Xif>ZL?aXb
* @since 2006-2-2 ([A%>u>h
* @version 1.0 YpvFv-
*/ /PpZ6ne~[
public class HeapSort implements SortUtil.Sort{ >ktekO:H
6ZQ$5PY
/* (non-Javadoc) @>F`;'_*z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !>fi3#Fi
*/ [7l5p(=
public void sort(int[] data) { N_p^DP
MaxHeap h=new MaxHeap(); 8\bZ?n#dn
h.init(data); N.vkM`Z
for(int i=0;i h.remove(); A{wk$`vH
System.arraycopy(h.queue,1,data,0,data.length); >+%p}l:<\
} WV;[vg]
sUZ2A1J}
private static class MaxHeap{ XUK%O8N#9
XcKyrh;i
void init(int[] data){ G{.A5{
this.queue=new int[data.length+1]; Hiih$O+
for(int i=0;i queue[++size]=data; :eBp`dmn
fixUp(size); \wp8kSzC
} }7i}dyQv}
} k~]\kv=
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private int size=0; sh%%U
"R[6Q ^vw
private int[] queue; -];Hb'M.!e
h: zi8;(
public int get() { E6xWo)`%5s
return queue[1]; hOe$h,E']
} qX]ej2
_<jccQ
public void remove() { Mvk#$:8e
SortUtil.swap(queue,1,size--); %p};Di[V
fixDown(1); T_qh_L3
} u73/#!(1=H
file://fixdown V6b)
private void fixDown(int k) { Yt;@@xe&
int j; mZ.E;X& ,*
while ((j = k << 1) <= size) { t`0(5v
if (j < size %26amp;%26amp; queue[j] j++; |RI77b:pX
if (queue[k]>queue[j]) file://不用交换 7T?7KS
break; P#2;1ki>
SortUtil.swap(queue,j,k); X6oY-4O
k = j; e(k$k>?
} 7P DD
} ^j'vM\^`ml
private void fixUp(int k) { ntF#x.1Pm
while (k > 1) { 0.!Q4bhD
int j = k >> 1; 5O"wPsl
if (queue[j]>queue[k]) uzLIllVX*
break; W97 &[([
SortUtil.swap(queue,j,k); r<.*:]L
k = j; "#`c\JuR]
} }q~xr3#
} MP`WU}2
_ 3>|1RB
} m}nA-*
1I U*:Z;Rz
} Alb5#tm:m
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SortUtil： ,DbT4Ul c
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package org.rut.util.algorithm; 'p(I!]"uo
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import org.rut.util.algorithm.support.BubbleSort; A\<WnG>xjP
import org.rut.util.algorithm.support.HeapSort; *!+?%e{;b
import org.rut.util.algorithm.support.ImprovedMergeSort; 0}aw9g
import org.rut.util.algorithm.support.ImprovedQuickSort; +luW=j0V
import org.rut.util.algorithm.support.InsertSort; FZtILlw
import org.rut.util.algorithm.support.MergeSort; cH$Sk
import org.rut.util.algorithm.support.QuickSort; D\V (r\i
import org.rut.util.algorithm.support.SelectionSort; N%`Eq@5
import org.rut.util.algorithm.support.ShellSort; "a>a "Ei
6b#J!:?
/** 610hw376B
* @author treeroot oNBYJ]t
* @since 2006-2-2 g/m%A2M&aH
* @version 1.0 ,h$j%->U
*/ Gnmxp%&}P|
public class SortUtil { Yim`3>#t
public final static int INSERT = 1; eVy\)dCsU
public final static int BUBBLE = 2; ?HaUT(\j
public final static int SELECTION = 3; +0O^!o
public final static int SHELL = 4; :n<<hR0d
public final static int QUICK = 5; [+v}V ,jb
public final static int IMPROVED_QUICK = 6; ~0@+8%^>;
public final static int MERGE = 7; -* ;`~5
public final static int IMPROVED_MERGE = 8; #$9rH 2zd
public final static int HEAP = 9; o*WI*Fb'
a"0'cgB}
public static void sort(int[] data) { z"lRfOWI
sort(data, IMPROVED_QUICK); G!IJ#|D:~
} :S |)
private static String[] name={ K.jm>]'z4;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ceqYyVy
}; ,b8q$R~\
.%EEly
private static Sort[] impl=new Sort[]{ +Udlt)H
new InsertSort(), L`{EXn[
new BubbleSort(), &O.S ;b*+
new SelectionSort(), v><uHjP
new ShellSort(), U0W- X9>y
new QuickSort(), *QpKeI
new ImprovedQuickSort(), I|?Z.!I|
new MergeSort(), 675x/0}GO
new ImprovedMergeSort(), O~AOZ^a:2
new HeapSort() hkL[hD
}; 8TnByKZz
~V4&l3o
public static String toString(int algorithm){ y(RK|r
return name[algorithm-1]; 0Ie9T1D=
} .v:K`y;f\(
#wZ:E,R
public static void sort(int[] data, int algorithm) { sx0:g?F3j
impl[algorithm-1].sort(data); YEx76
} =1"8ua
3#ua
public static interface Sort { (_ElM>
public void sort(int[] data); fw1g;;E
} )d6Ya1vJH
PDcZno?
public static void swap(int[] data, int i, int j) { 6 4da~SEn
int temp = data; Y@Kp'+t(!
data = data[j]; m,U`hPJ
data[j] = temp; @"#W\m8
} 6"W~%FSJX
} 43Yav+G(+