[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; ,i,f1XJ|
} /of,4aaK7
int i1=l; 1UxRN7
int i2=mid+1; 7&|fD{:4U
for(int cur=l;cur<=r;cur++){ b3y@!_'c
if(i1==mid+1) ]*I&104{
data[cur]=temp[i2++]; c1jgBty
else if(i2>r) Ler9~}\D
data[cur]=temp[i1++]; sE-"TNONZ
else if(temp[i1] data[cur]=temp[i1++]; {.Nt#l
else w9i1ag
data[cur]=temp[i2++]; =GFlaGD
} |w:7).P
} ]U'KYrh
DQKhR sC
} "sL#)<%
J&{E
改进后的归并排序: Ur]5AJ
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package org.rut.util.algorithm.support; "d%":F(
9b()ck-\F#
import org.rut.util.algorithm.SortUtil; ,v>P05
=(.HO:#
/** 611:eLyy&l
* @author treeroot bWjW_$8
* @since 2006-2-2 OC"W=[Myl
* @version 1.0 J"I{0>@
*/ #LBZ%%v
public class ImprovedMergeSort implements SortUtil.Sort { !63x^# kg
#}e)*(
private static final int THRESHOLD = 10; ;Fp"]z!Qh+
? 0nbvV5v7
/* (Cqhk:F
* (non-Javadoc) /':kJOk<[
* A5Y z|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S :9zz
*/ UT]LF#.(
public void sort(int[] data) { #Z (B4YO
int[] temp=new int[data.length]; M2vYOg`t:c
mergeSort(data,temp,0,data.length-1); b s:E`Q
} "aAzG+NM
?w /tq!
private void mergeSort(int[] data, int[] temp, int l, int r) { $6BXoh!
int i, j, k; U1J?o#(
int mid = (l + r) / 2; ks:Z=%o
if (l == r) m_' 1yX@
return; a&wl-
if ((mid - l) >= THRESHOLD) BEifUgCh
mergeSort(data, temp, l, mid); z/6eP`jj
else O6lj^
insertSort(data, l, mid - l + 1); V\X.AGc
if ((r - mid) > THRESHOLD) vYrqZie<
mergeSort(data, temp, mid + 1, r); mqw&SxU9
else h-Ffs
insertSort(data, mid + 1, r - mid); VmV/~-<Z
!W .ooy5(
for (i = l; i <= mid; i++) { NR^z!+oSR
temp = data; r5tv9#4]
} fh}\#WE"
for (j = 1; j <= r - mid; j++) { WPpl9)Qc
temp[r - j + 1] = data[j + mid]; v#nYH?+~mJ
} EcBSi995dj
int a = temp[l]; I tp7X
int b = temp[r]; Lc0^I<Y
for (i = l, j = r, k = l; k <= r; k++) { "P"~/<:)
if (a < b) { 56d,Sk)
data[k] = temp[i++]; $>]7NTP
a = temp; bC)diC
} else { "*XR'9~7
data[k] = temp[j--]; L%U-MOS=
b = temp[j]; qL UbRp
} Ej8EQ%P
} >&Y8VLcK
} (lTM^3 }
3dQV5E.
/** s?7g3H5#0k
* @param data f9X*bEl9;`
* @param l yA \C3r'
* @param i 5e6]v2 k
*/ IF$f^$
private void insertSort(int[] data, int start, int len) { $IUT5Gia`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yzgDdAM
} kd9hz-*
} d7N}-nsB
} b P4R
} ]k " j
i|)<#Ywl
堆排序： 1^b-J0
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package org.rut.util.algorithm.support; AQQeLdTq
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import org.rut.util.algorithm.SortUtil; q.g<gu]
L6J=m#Ld
/** s+h`,gg9
* @author treeroot BC9rsb
* @since 2006-2-2 7%&#V2
* @version 1.0 8{(;s$H~
*/ p\WW~qD
public class HeapSort implements SortUtil.Sort{ yL7a*C&
0!eZ&.h?4
/* (non-Javadoc) oV&AJ=|\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vp{jh-&
*/ {^1D|y
public void sort(int[] data) { D42Bm&JocO
MaxHeap h=new MaxHeap(); cAC]%~orx
h.init(data); Z)~.OqRw]
for(int i=0;i h.remove(); aP>%iRk'J!
System.arraycopy(h.queue,1,data,0,data.length); )lTkqz8v
} Z455g/=ye
=3_I;Lw
private static class MaxHeap{ ^Z$%OM,
Y?{L:4cRX
void init(int[] data){ hdXdz aNS
this.queue=new int[data.length+1]; F)z]QJOw
for(int i=0;i queue[++size]=data; ?MHVkGD
fixUp(size); Uw8O"}U8
} 5<0&y3
} <=W;z=$!Bb
T&H[JQ/h
private int size=0; =EA*h_"q9
W`*S?QGzl@
private int[] queue; ,JYvfCA
j,Eo/f+j5
public int get() { 'j 'bhG
return queue[1]; {F+7> X
} }q^M
jSsbLa@
public void remove() { :,h47'0A
SortUtil.swap(queue,1,size--); PmZ-H>
fixDown(1); K.Nun)<
} vUk <z*
file://fixdown 5A g4o
private void fixDown(int k) { [y7BHikX)
int j; !_3RdS
while ((j = k << 1) <= size) { dq+VW}[EO
if (j < size %26amp;%26amp; queue[j] j++; 8$xd;+`y'
if (queue[k]>queue[j]) file://不用交换 mJ2>#j;5f
break; Y;O\ >o[
SortUtil.swap(queue,j,k); N,0l5fD~T
k = j; kAsYh4[
} f"\G"2C
} q"7rd?r52
private void fixUp(int k) { D(yU:^L
while (k > 1) { PHU#$LG
int j = k >> 1; bS=aFl#
if (queue[j]>queue[k]) "g;^R/sfq
break; 2MS1<VKZ@
SortUtil.swap(queue,j,k); 9tDo5 29
k = j; Rf||(KC<
} 7s+3^'
} u,mC`gz
>`R}ulz)
} ebxpKtEC
(RW02%`jjy
} iG()"^G
&ejJf{id
SortUtil： !ba /]A/
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package org.rut.util.algorithm; }pxMO? h$
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import org.rut.util.algorithm.support.BubbleSort; `O4Ysk72x9
import org.rut.util.algorithm.support.HeapSort; TUuw
import org.rut.util.algorithm.support.ImprovedMergeSort; q1Gc0{+)
import org.rut.util.algorithm.support.ImprovedQuickSort; \bNN]=
import org.rut.util.algorithm.support.InsertSort; xfZ.
import org.rut.util.algorithm.support.MergeSort; ,Dd )=
import org.rut.util.algorithm.support.QuickSort; 6c>cq\~E
import org.rut.util.algorithm.support.SelectionSort; 96x$Xl;
import org.rut.util.algorithm.support.ShellSort; | #Z+s-
"Qj;pqR
/** r%QTUuRXC3
* @author treeroot In<L?U?([D
* @since 2006-2-2 sH(@X<{p
* @version 1.0 =|_:H$94
*/ -T3 z@k
public class SortUtil { =aR'S\<
public final static int INSERT = 1; BV_rk^}Ur
public final static int BUBBLE = 2; ~5g2~.&*
public final static int SELECTION = 3; ' P5ttI#|
public final static int SHELL = 4; d~n|F|`:
public final static int QUICK = 5; WsO'4~X9
public final static int IMPROVED_QUICK = 6; E:'TZ4Z
public final static int MERGE = 7; /qM:;:N%j
public final static int IMPROVED_MERGE = 8; N.R,[K
public final static int HEAP = 9; ?"-%>y@w
ElLDSo@WvR
public static void sort(int[] data) { nW#UBtZ
sort(data, IMPROVED_QUICK); *-0tj~)>
} H <7r
private static String[] name={ ntK#7(U'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0wL-Ak#v
}; 6^_:N1@
I.#V/{J
private static Sort[] impl=new Sort[]{ X <QSi
new InsertSort(), wtlIyE
new BubbleSort(), ;n1<1M>!
new SelectionSort(), ]'+PJdA
new ShellSort(), c4H5[LPF
new QuickSort(), =*<Cw?Gc
new ImprovedQuickSort(), Xo^P=uf%
new MergeSort(), 7:iTx;,v
new ImprovedMergeSort(), _gDEIoBp
new HeapSort() `P/7Mf
}; 5M6`\LyU
9C9>V]
public static String toString(int algorithm){ 3Ov? kWFO
return name[algorithm-1]; tgeX~.
} #( G>J4E,
j8gw]V/B:
public static void sort(int[] data, int algorithm) { +$_.${uwV
impl[algorithm-1].sort(data); }e[;~g\&
} W\f u0^
N1dv}!/*.+
public static interface Sort { OAx5 LTd
public void sort(int[] data); `?@7T-v
} 4I&e_b< 30
.%Pt[VQ
public static void swap(int[] data, int i, int j) { 5MU-Eu|*>
int temp = data; dZ]['y%
data = data[j]; e0rh~@E
data[j] = temp; Qy< ~{6V
} ICq
} 9*`(*>S