[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; PHAM(iC&D
} Dj9v9
int i1=l; D02'P{
int i2=mid+1; h(~@ nd{
for(int cur=l;cur<=r;cur++){ wH?]kV8Q
if(i1==mid+1) dDu8n+(8 L
data[cur]=temp[i2++]; > J.q3
else if(i2>r) *XUJv&ZN
data[cur]=temp[i1++]; ^;8dl.;
else if(temp[i1] data[cur]=temp[i1++]; p>ba6BDJT
else 7MbV|gM}
data[cur]=temp[i2++]; i C)+5L#'
} "]SA4Ud^
} dI(1L~
2v$\mL
} r+Pfq[z&
q1^bH6*fl
改进后的归并排序: ,kQCCn]
2y"L&3W
package org.rut.util.algorithm.support; m~I@q [
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import org.rut.util.algorithm.SortUtil; (X?HuWTm
!We9T)e
/** *w#^`yeo
* @author treeroot gB_gjn\
* @since 2006-2-2 R+*-i+]Q#7
* @version 1.0 S4S}go*G[
*/ 8l>7=~Egp
public class ImprovedMergeSort implements SortUtil.Sort { q _INGCJ
~0@uR
private static final int THRESHOLD = 10; P7 h^!a/
6:Hd`
/* %zKTrsMZ
* (non-Javadoc) +xL' LCx
* u<U8LR=)V5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !#Pr'm/,mu
*/ {EjzJr>
public void sort(int[] data) { Qef5eih
int[] temp=new int[data.length]; *b4W+E
mergeSort(data,temp,0,data.length-1); IKrojK8-?
} Y1wH_!%b
K_Pbzj4(P
private void mergeSort(int[] data, int[] temp, int l, int r) { csFLBP
int i, j, k; %N#A1
int mid = (l + r) / 2; 7](aPm8
if (l == r) \zJb}NbnT
return; ms&6N']
if ((mid - l) >= THRESHOLD) XI'.L ~
mergeSort(data, temp, l, mid); tXCgRU
else %oOSmt
insertSort(data, l, mid - l + 1); v t_lM
if ((r - mid) > THRESHOLD) P67*-Ki
mergeSort(data, temp, mid + 1, r); ,7I
else hg7_ZjO
insertSort(data, mid + 1, r - mid); oe*fgk/o9
3:aj8F2
for (i = l; i <= mid; i++) { QQ/9ZI5
temp = data; (kVxa8 0
} .wO-2h{Q
for (j = 1; j <= r - mid; j++) { !GJT-[
temp[r - j + 1] = data[j + mid]; s-4qK(ml-
} >l b9j>
int a = temp[l]; F AQx8P
int b = temp[r]; k?}y@$[)
for (i = l, j = r, k = l; k <= r; k++) { Ou_2UT
if (a < b) { Obx!>mI^6
data[k] = temp[i++]; ^v&"{2
a = temp; Nh01NY;
} else { rA|&G'
data[k] = temp[j--]; 58t_j54
b = temp[j]; ,`8:@<e
} $WiUoS
} ^KJi|'B
} -C2[ZP-
sk5B} -
/** zWrynJ}s
* @param data Mn 8| Knh
* @param l 9JqT"zj
* @param i x9o(q`N
*/ bt"5.nm
private void insertSort(int[] data, int start, int len) { !ir%Pz^)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \bies1TBB^
} K}DrJ/s
} \8)FVpS
} .)E1|U[L
} (~NR."s;
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堆排序： uvRX{q4
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package org.rut.util.algorithm.support; pQxv_4
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import org.rut.util.algorithm.SortUtil; +Mb}70^
A>frf[fAW
/** *|^|| bd
* @author treeroot RS|*3 $1
* @since 2006-2-2 `Bb32L
* @version 1.0 xS;tmc
*/ #"-DE-I[
public class HeapSort implements SortUtil.Sort{ FP")$ ,=s
Q?bC'147O
/* (non-Javadoc) hG}gKs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ctPT=i60
*/ &"=O!t2
public void sort(int[] data) { / <+F/R'=O
MaxHeap h=new MaxHeap(); }&]T0U`@
h.init(data); tlYB'8bJY
for(int i=0;i h.remove(); N+vsQ!Qz
System.arraycopy(h.queue,1,data,0,data.length); W!|l_/L'
} sT,*<^
w3;T]R*
private static class MaxHeap{ S rhBU6K
9RC:-d;;_
void init(int[] data){ FjW%M;H
this.queue=new int[data.length+1]; :|-^et]a8
for(int i=0;i queue[++size]=data; 7HJH9@8V
fixUp(size); \0)2 u[7
} }+giQw4
} ;<=z^1X9
1I%niQv5t
private int size=0; L+lX$k
%r@:7/
private int[] queue; O4!!*0(+91
u63Q<P<
public int get() { As??_=>4
return queue[1]; W]D+[mpgK
} `69xR[f
u~!Pzz3"
public void remove() { \Hu?K\SWs
SortUtil.swap(queue,1,size--); bV:MOj^
fixDown(1); (e32oP"
} ^[EXTBk@:
file://fixdown U%KgLg#
private void fixDown(int k) { [4-u{Tu
int j; lr[&*v?h
while ((j = k << 1) <= size) { gu1n0N`b
if (j < size %26amp;%26amp; queue[j] j++; !N/?b^y
if (queue[k]>queue[j]) file://不用交换 u&'&E
break; =j@8/
SortUtil.swap(queue,j,k); K,!f7KKo
k = j; [9Hrpo]tU:
} %htbEKWR
} p+;x&h)[l
private void fixUp(int k) { b(A;mt#N
while (k > 1) { ^oEaE#I
int j = k >> 1; ~g *`E!2
if (queue[j]>queue[k]) /+m7J"Km
break; @9g!5dcT
SortUtil.swap(queue,j,k); ^t[br6G
k = j; 2\#~%D>[
} &>Z p}.V
} mFyYn,Mu|
!/Wv\qm
} CYNpbv
?xt${?KP
} _mDvRFq
G 'CYvV
SortUtil： %sS7o3RW\
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package org.rut.util.algorithm; mZ.E;X& ,*
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import org.rut.util.algorithm.support.BubbleSort; '~76Y9mv
import org.rut.util.algorithm.support.HeapSort; TzrU |D?
import org.rut.util.algorithm.support.ImprovedMergeSort; $I a-go2W
import org.rut.util.algorithm.support.ImprovedQuickSort; ^Y^5 @x=
import org.rut.util.algorithm.support.InsertSort; NmV][0(BS
import org.rut.util.algorithm.support.MergeSort; `(L<Q%
import org.rut.util.algorithm.support.QuickSort; m A|"
import org.rut.util.algorithm.support.SelectionSort; tHo/Vly6Z
import org.rut.util.algorithm.support.ShellSort; j*jq2u
u_S>`I
/** <PQ[N[SU
* @author treeroot \JGRd8S[
* @since 2006-2-2 p+R8Mo;I
* @version 1.0 |9 4xRC
*/ yXA]E.K!
public class SortUtil { C5oIl_t
public final static int INSERT = 1; :w4I+*]
public final static int BUBBLE = 2; z|G 39
public final static int SELECTION = 3; $]iRfXv,l!
public final static int SHELL = 4; XXZ$^W&
public final static int QUICK = 5; @_Ly^' "
public final static int IMPROVED_QUICK = 6; Pl[WCh
public final static int MERGE = 7; #e;\Eap
public final static int IMPROVED_MERGE = 8; 7033#@_
public final static int HEAP = 9; 'p(I!]"uo
I\ y>I?X
public static void sort(int[] data) { #|{^k u
sort(data, IMPROVED_QUICK); Y&DC5T]
} fpvzx{2
private static String[] name={ <txzKpM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5$f*fMd;
}; ^ P=CoLFa
HUY1nb=
private static Sort[] impl=new Sort[]{ z/7"!
new InsertSort(), E- rXYNfy
new BubbleSort(), "G!V?~;
new SelectionSort(), :#p!&Fi
new ShellSort(), tL@m5M%:N2
new QuickSort(), N @sVA%L.
new ImprovedQuickSort(), -%)8=
new MergeSort(), $kk!NAW
new ImprovedMergeSort(), W>]=0u4
new HeapSort() `'<&<P
}; (6\ H~
|/AY!Y3
public static String toString(int algorithm){ D`uOBEX
return name[algorithm-1]; 4U1"F 7'
} {piZm12q?
kzb1iBe 6m
public static void sort(int[] data, int algorithm) { iG;GAw|E
impl[algorithm-1].sort(data); We,~P\g
} j!<RY>u
^aO\WKkA
public static interface Sort { IK^jzx
public void sort(int[] data); YNi3oG]h
} H"> }yD
>|So`C3:e
public static void swap(int[] data, int i, int j) { kzLtI w&.
int temp = data; %z:;t
data = data[j]; [Lo}_v&
data[j] = temp; rhe;j//`
} c\pPwG
} hgi9%>oUB