[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; 0`UI^Y~Q
} hGh91c;4
int i1=l; ]dIcW9a
int i2=mid+1; G%ytp=N
for(int cur=l;cur<=r;cur++){ e}>3<Dh
if(i1==mid+1) 3N c#6VI
data[cur]=temp[i2++]; CoZOKRoaH
else if(i2>r) ~/^q>z!\4
data[cur]=temp[i1++]; iOY: a
else if(temp[i1] data[cur]=temp[i1++]; K93L-K^J
else 0RFBun{
data[cur]=temp[i2++]; H j [!F%
} 3D 4-Wo4
} RK)1@Tz7!
!=Scpo_
} AS4mJ UU9
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改进后的归并排序: R*0]*\C z
OFe-e(c1
package org.rut.util.algorithm.support; f[}(E
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import org.rut.util.algorithm.SortUtil; qofD@\-
1A%0y)]
/** Th_PmkvC
* @author treeroot 6}l[%8
* @since 2006-2-2 r)S:-wP
* @version 1.0 ,>+B>lbJ*
*/ S^s|/!>
public class ImprovedMergeSort implements SortUtil.Sort { 4SVIdSA
hKnAWKb0
private static final int THRESHOLD = 10; +>3jMs~&
fHK.q({Qc
/* e&nE
* (non-Javadoc) }#r awVe=
* W{m_yEOf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Jm~Um!
*/ PctXh, =
public void sort(int[] data) { JR_%v=n~x
int[] temp=new int[data.length]; ]sTbEw.[
mergeSort(data,temp,0,data.length-1); ZJe^MnE (G
} BItH0r7
5G2G<[p5oQ
private void mergeSort(int[] data, int[] temp, int l, int r) { 40%fOu,u`
int i, j, k; H-rxn
int mid = (l + r) / 2; a[Nm< qV05
if (l == r) !\VzX
return; &V|kv"Wwj
if ((mid - l) >= THRESHOLD) O^J=19Ri
mergeSort(data, temp, l, mid); d.|*sZ&3p
else e%s1D
insertSort(data, l, mid - l + 1); AL!ppi
if ((r - mid) > THRESHOLD) sZI"2[bk
mergeSort(data, temp, mid + 1, r); 'ZJb`
else +T\<oj%}2
insertSort(data, mid + 1, r - mid); ,wf:Fr
G2<$to~{
for (i = l; i <= mid; i++) { a,36FF~&
temp = data; H#i,Ve'
} C7O8B;
for (j = 1; j <= r - mid; j++) { S B~opN
temp[r - j + 1] = data[j + mid]; zLgc j(;
} Mw3$QRM
int a = temp[l]; in K]+H]{
int b = temp[r]; inY_cn?
for (i = l, j = r, k = l; k <= r; k++) { vw 6$v
if (a < b) { up{0ehr
data[k] = temp[i++]; uI$n7\G!
a = temp; mPU}]1*p
} else { AR!v%Z49i
data[k] = temp[j--]; uh2 Fr
b = temp[j]; kebk f,`p
} 0BNH~,0u
} 0C;Js\>3]
} )ut$644R
Nyt*mbd5 {
/** L(bDk'zi
* @param data (/2rj[F&
* @param l WH4rZ }Z`
* @param i L[ZS17;*
*/ mKjTJzS
private void insertSort(int[] data, int start, int len) { 5kGQf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >yr;Y4y7K
} P4HoKoj2`
} *v%gNq
} Y(t/=3c[
} CuK>1_Dq
0r_~LN^|[
堆排序： sBYDo{01
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package org.rut.util.algorithm.support; T9}~]zW7P
sZ~03QvkT
import org.rut.util.algorithm.SortUtil; i3mw.`7
=xDxX#3
/** g%tUkM
* @author treeroot p6NPWaBR
* @since 2006-2-2 vmEn$`&2t
* @version 1.0 w&f>VB~,1
*/ *#E_KW1RV
public class HeapSort implements SortUtil.Sort{ V,rR*a&p
&"WgO!pzD
/* (non-Javadoc) \9@}0}%`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NC!B-3?x
*/ xI<B)6D;f
public void sort(int[] data) { Y@:l!4DI
MaxHeap h=new MaxHeap(); GApvRR+Z
h.init(data); c7{s'ifG
for(int i=0;i h.remove(); J~xm[^0
System.arraycopy(h.queue,1,data,0,data.length); x1Y/^ks@2
} WY QVe_<z:
50|nQ:u,
private static class MaxHeap{ 5x|$q kI
?]bx]Y;
void init(int[] data){ % >a /m.$
this.queue=new int[data.length+1]; *1!'ZfT;
for(int i=0;i queue[++size]=data; $[b}r#P
fixUp(size); U\,N
} 9{U@s
} @`+\vmfD
<$hv{a
private int size=0; ~8UMwpl-
{X2uFw Gi
private int[] queue; V1Ojr~iM
k%u fgHl!
public int get() { -xLK/QAL
return queue[1]; o3\^9-jmp
} wSCI?
o\ce|Dzt
public void remove() { 7p\&D?
SortUtil.swap(queue,1,size--); >);M\,1\I
fixDown(1); B5+Q%)52
} <&`Rf6
file://fixdown }eA)m
private void fixDown(int k) { g~,iWoY
int j; Y@q9
while ((j = k << 1) <= size) { Z_dL@\#|
if (j < size %26amp;%26amp; queue[j] j++; pzjNi=vhd
if (queue[k]>queue[j]) file://不用交换 DF-PBVfpu
break; D3,)H%5.y
SortUtil.swap(queue,j,k); LttA8hf5q?
k = j; +A1*e+/b\
} RrH{Y0
} AqQ5L>:Gq
private void fixUp(int k) { i9rv8"0>
while (k > 1) { |7n%8JsY!"
int j = k >> 1; uVhzJu.
if (queue[j]>queue[k]) S76MY&Vx23
break; -qvMMit%7
SortUtil.swap(queue,j,k); dT&u}o3X
k = j; q^6#.}
} N}[!QE
} T*Ge67
4JXvP1`
} -G?IXgG
-OmpUv-O"
} Ktt(l-e+
)+Z.J]$O-
SortUtil： b&QI#w
SYQP7oG9oQ
package org.rut.util.algorithm; KRn[(yr`%
yKK9b
import org.rut.util.algorithm.support.BubbleSort; @].!}tz
import org.rut.util.algorithm.support.HeapSort; \kY:|T
import org.rut.util.algorithm.support.ImprovedMergeSort; k#~oagW_Gw
import org.rut.util.algorithm.support.ImprovedQuickSort; AY"wEyNU
import org.rut.util.algorithm.support.InsertSort; sUR5Q/Q
import org.rut.util.algorithm.support.MergeSort; FqGMHM\J
import org.rut.util.algorithm.support.QuickSort; i4WHjeo\
import org.rut.util.algorithm.support.SelectionSort; 65U\;Ew
import org.rut.util.algorithm.support.ShellSort; khT[
2*cc26o
/** #u+qV!4
* @author treeroot s:_j,/H0A}
* @since 2006-2-2 "Dq^r9
* @version 1.0 VM&Ref4
*/ Y}q~Km
public class SortUtil { hMvJNI6O
public final static int INSERT = 1; kEAF1RP:
public final static int BUBBLE = 2; r~7}w4U
public final static int SELECTION = 3; m:~y:.
public final static int SHELL = 4; ,afO\oe>MG
public final static int QUICK = 5; 8yDsl
public final static int IMPROVED_QUICK = 6; Qi=0[
public final static int MERGE = 7; i|,}y`C#
public final static int IMPROVED_MERGE = 8; Tj!\SbnA[
public final static int HEAP = 9; /[/{m]
rK}sQ4z=
public static void sort(int[] data) { 1=9GV+`n
sort(data, IMPROVED_QUICK); Z!fbc#L6
} -`z%<)!Y
private static String[] name={ `m#G'E I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x;} 25A|
}; /F|VYl^_
`)KGajB
private static Sort[] impl=new Sort[]{ p15dbr1
new InsertSort(), Ly2!(,FB.
new BubbleSort(), :9x]5;ma
new SelectionSort(), P\{s C6E
new ShellSort(), 9jx>&MnWs
new QuickSort(), 3fZoF`<a
new ImprovedQuickSort(), pEN`6*
new MergeSort(), d1t_o2
new ImprovedMergeSort(), :M`~9MCRf
new HeapSort() KjF8T7%
}; &t_TLV 8T
Vu4LC&q
public static String toString(int algorithm){ :ec>[N~KG
return name[algorithm-1]; Fe$o*r,
} $83Qd
[]yIz1P=j
public static void sort(int[] data, int algorithm) { jeA2yjAC
impl[algorithm-1].sort(data); +<V$G/"
} =JPY{'VO
t.O~RE
public static interface Sort { $$Ibr]$5
public void sort(int[] data); T?jN/}qg
} M_cm,|FF
Hv:~)h$
public static void swap(int[] data, int i, int j) { nG?Z* n
int temp = data; K9VP@[zbJ
data = data[j]; |DVFi2
data[j] = temp; v/$<#2|
} 86?~N
} i*&b@.7N