[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; V9,<>
} cry1gnWG
int i1=l; dMH_:jb
int i2=mid+1; GLn=*Dh#
for(int cur=l;cur<=r;cur++){ Tb$))O}
if(i1==mid+1) 3)y1q>CQf
data[cur]=temp[i2++]; 9h amxi
else if(i2>r) q1T)H2S
data[cur]=temp[i1++]; ->rqr#
else if(temp[i1] data[cur]=temp[i1++]; {5~h
else F(yR\)!C
data[cur]=temp[i2++]; 68XJ`/d
} c|k_[8L
} Cgx:6TRS
k1<^Ept
} `Pvi+:6\Y
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改进后的归并排序: Hw o _;fV
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package org.rut.util.algorithm.support; DjM*U52Yfj
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import org.rut.util.algorithm.SortUtil; NX&dJ 6a
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/** Jy)=TJ!y
* @author treeroot w'K7$F51
* @since 2006-2-2 i%-yR DIX
* @version 1.0 Q>,&@
*/ z2iMpZ
public class ImprovedMergeSort implements SortUtil.Sort { (oGYnN,2
}PBme'kP
private static final int THRESHOLD = 10; ENZym
c!ZZMCs
/* m$p}cok#+S
* (non-Javadoc) rLsY_7!
* E`o_R=%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /_0B5,6R
*/ "V' r}>
public void sort(int[] data) { "E\vdhk
int[] temp=new int[data.length]; ,~Mf2Y#m0p
mergeSort(data,temp,0,data.length-1); ^%$IdDx
} 9;+&}:IVS
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private void mergeSort(int[] data, int[] temp, int l, int r) { Sb[>R(0:
int i, j, k; k24I1DlR8
int mid = (l + r) / 2; \J+a7N8m,
if (l == r) !|Q&4NS
return; ,{PN6B
if ((mid - l) >= THRESHOLD) f'oTN!5WF
mergeSort(data, temp, l, mid); g{V(WyT@
else wH ,PA:
insertSort(data, l, mid - l + 1); Pvc)-A
if ((r - mid) > THRESHOLD) klUV&O+=%
mergeSort(data, temp, mid + 1, r); ^ 8}P_
else K1 "HJsj
insertSort(data, mid + 1, r - mid); yMNJHiE/
TRi'l#m4
for (i = l; i <= mid; i++) { ,Vi_~b
temp = data; nK;d\DO
} y|| n9
for (j = 1; j <= r - mid; j++) { 9i\RdJv.
temp[r - j + 1] = data[j + mid]; 6\.g,>
} kH eD(Ea
int a = temp[l]; VZi1b0k1.
int b = temp[r]; p& _Z}Wv
for (i = l, j = r, k = l; k <= r; k++) { JTKS5r7?
if (a < b) { 05 6K)E
data[k] = temp[i++]; 5nx*D"
a = temp; epsRv&LfC
} else { KNeVSZT
data[k] = temp[j--]; h>`[p,o
b = temp[j]; H1k)ya x4_
} D,cD]tB2
} GJB+]b-
} g$uiwqNA%
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/** mfj{_fR3
* @param data @ym:@<D
* @param l =78y*`L
* @param i E:9RskI
*/ 0kUhz\"R:q
private void insertSort(int[] data, int start, int len) { D9g*+KM&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (f&V 7n
} &E]) sJ0
} fQ9af)d
} )j8'6tk)Z
} ":eyf3M
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堆排序： E/H9#
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package org.rut.util.algorithm.support; :7(fBf5
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import org.rut.util.algorithm.SortUtil; 4M"'B A<
SVa^:\"$[
/** QHv]7&^rlj
* @author treeroot ^h_rE |c
* @since 2006-2-2 Lj /^cx
* @version 1.0 MTwzL<@$
*/ htYfIy{5w
public class HeapSort implements SortUtil.Sort{ z/j*zU `
/*g0M2+OZo
/* (non-Javadoc) `V/kM0A5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x<t?Yc9
*/ 67/@J)z0%
public void sort(int[] data) { <1vogUDW
MaxHeap h=new MaxHeap(); BHpay
h.init(data); XyB_8(/E
for(int i=0;i h.remove(); iw.F8[})
System.arraycopy(h.queue,1,data,0,data.length); "U9e)a0v
} ~e|E5[-i
{U9{*e$=
private static class MaxHeap{ *=md!^x`
xz`0V}dPl
void init(int[] data){ =glG |
this.queue=new int[data.length+1]; \V~B+e
for(int i=0;i queue[++size]=data; v#d3W| ~
fixUp(size); fhk(<KZvJ
} oJVdFE
} zq5N@dF
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private int size=0; |s#,^SJ0
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private int[] queue; 2L<1]:I
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public int get() { ZHRMW'Ne
return queue[1]; 3Q&@l49q
} z>W?\[E<2
WG3_(mM
public void remove() { [g==#[
SortUtil.swap(queue,1,size--); :EPe,v RT
fixDown(1); 7LaRFL.,kO
} M3eSj`c3
file://fixdown BD$Lf,_
private void fixDown(int k) { J^WX^".E
int j; dRs\e(H'
while ((j = k << 1) <= size) { k-4z2qB
if (j < size %26amp;%26amp; queue[j] j++; Yi-,Pb?
if (queue[k]>queue[j]) file://不用交换 {DVMs|5;^
break; 5/hgWG6.t
SortUtil.swap(queue,j,k); ga'G)d3oS
k = j; {#=o4~u%;H
} .Z`xNp
} }w=|"a|,
private void fixUp(int k) { a'q&[08
while (k > 1) { {h|kx/4{m
int j = k >> 1; CT\rx>[J.6
if (queue[j]>queue[k]) s4Jy96<
break; nr>Yj?la
SortUtil.swap(queue,j,k); 0#5&*
k = j; ZXj*Vu$_4
} -f'&JwE0=
} [:izej(\
v)vogtAQa
} (\'lV8}U
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} A'uubFRL2[
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SortUtil： IUWJi\,
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package org.rut.util.algorithm; n-?zH:]GG{
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import org.rut.util.algorithm.support.BubbleSort; 2Z9ck|L>
import org.rut.util.algorithm.support.HeapSort; {iQ4jJ`n
import org.rut.util.algorithm.support.ImprovedMergeSort; ,7d#t4
import org.rut.util.algorithm.support.ImprovedQuickSort; 7OPRf9+o
import org.rut.util.algorithm.support.InsertSort; xyV7MW\?w
import org.rut.util.algorithm.support.MergeSort; xNJ*TA[+
import org.rut.util.algorithm.support.QuickSort; nh+h3"-d
import org.rut.util.algorithm.support.SelectionSort; @]]\r.DG
import org.rut.util.algorithm.support.ShellSort; A)#Fyde
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/** #|V)>")
* @author treeroot U$=Z`^<
* @since 2006-2-2 fn5!Nr ,
* @version 1.0 SJ,];mC0
*/ i:&$I=
public class SortUtil { e=!sMWx6
public final static int INSERT = 1; 6/0bis H
public final static int BUBBLE = 2; =FAIbM>u
public final static int SELECTION = 3; Yru,YA
public final static int SHELL = 4; 2`V0k.$?p
public final static int QUICK = 5; HbCcROl(
public final static int IMPROVED_QUICK = 6; $7O3+R/=
public final static int MERGE = 7; ~A(^<
public final static int IMPROVED_MERGE = 8; pCeCR
public final static int HEAP = 9; #]*d8
X4k|k>
public static void sort(int[] data) { +wGvYr
sort(data, IMPROVED_QUICK); ws;|fY
} -|:mRAe
private static String[] name={ Q}^qu6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \Jwc[R&x
}; }+:X=@Z@
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private static Sort[] impl=new Sort[]{ xd`\Ai
new InsertSort(), 7<*g'6JG[
new BubbleSort(), |lIgvHgg
new SelectionSort(), NiVZ=wEp,
new ShellSort(), 5z.Y}
new QuickSort(), $GD Q1&Z
new ImprovedQuickSort(), u`*1OqU
new MergeSort(), 0\1g-kc!v
new ImprovedMergeSort(), S""F58H n
new HeapSort() bhKe"#m|S
}; wEl/s P
B?d+^sz]
public static String toString(int algorithm){ ;Yt'$D*CP
return name[algorithm-1]; `@&WELFv{
} GCrsf
C)cuy7<
public static void sort(int[] data, int algorithm) { i2)$%M&
impl[algorithm-1].sort(data); +WCV"m
} L7yEgYB
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public static interface Sort { Xk:_aJ
public void sort(int[] data); a!&<jM
} t&o&gb
aC3Qmo6?m
public static void swap(int[] data, int i, int j) { [mo9?
int temp = data; #,SPV&
data = data[j]; Jn\>Sz(96
data[j] = temp; N8*QAekN
} m&--$sr
} )|&FBz;