[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; nsi?.c&0!
} d38o*+JCf
int i1=l; d5Ae67
int i2=mid+1; G5U?]& I8
for(int cur=l;cur<=r;cur++){ aB;f*x
if(i1==mid+1) ^rq\kf*]
data[cur]=temp[i2++]; `x _(EZ
else if(i2>r) *Xk5H,:
data[cur]=temp[i1++]; rMIX{K)'f
else if(temp[i1] data[cur]=temp[i1++]; /"La@M37
else nm<VcCc
data[cur]=temp[i2++]; =ZURh_{xV
} rM= :{
} |X>'W"Mn
qQ)1+^
} @hA`f4^
M-h+'G
改进后的归并排序: .E^w, o
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package org.rut.util.algorithm.support; oCkG
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import org.rut.util.algorithm.SortUtil; 6:%lxG
pEcYfj3M
/** bFN/{^SB
* @author treeroot Hm>cKPZ)
* @since 2006-2-2 D['J4B
* @version 1.0 KZg2`8F
*/ T\p>wiY2|F
public class ImprovedMergeSort implements SortUtil.Sort { r@r*|50
5%9Uh'y#
private static final int THRESHOLD = 10; o[KZm17
a_S`$(7k
/* dO2?&f
* (non-Javadoc) 7)<Ib j<M
* ^cPVnl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X(x,6cC
*/ K!ogpd&X&
public void sort(int[] data) { ;0m J4G
int[] temp=new int[data.length]; 6|q"lS*$S
mergeSort(data,temp,0,data.length-1); Rkk`+0K7$J
} ,m`&J?
Dx /w&v
private void mergeSort(int[] data, int[] temp, int l, int r) { ws`r\k]3J
int i, j, k; Ws3z-U>j
int mid = (l + r) / 2; V*s\~h)
if (l == r) +~G:z|k
return; Jxe5y3* (
if ((mid - l) >= THRESHOLD) 4$vUD1('
mergeSort(data, temp, l, mid); 0$`pYW]
else @BnK C&{
insertSort(data, l, mid - l + 1); VFZyWX@#u
if ((r - mid) > THRESHOLD) FLQke"6i0:
mergeSort(data, temp, mid + 1, r); |=:@<0.'
else *>qc6d@'
insertSort(data, mid + 1, r - mid); ;sYDs71y
um$U3'0e
for (i = l; i <= mid; i++) { {~51h}>b#
temp = data; y_[VhZ%
} R?lTB3"
for (j = 1; j <= r - mid; j++) { V}<<?_
temp[r - j + 1] = data[j + mid]; \ CcVk"/
} 7^rT-f07
int a = temp[l]; kb~ s,@p
int b = temp[r]; |b='DJz2
for (i = l, j = r, k = l; k <= r; k++) { Ag:/iB]
if (a < b) { z"7?I$NQ
data[k] = temp[i++]; "&D0Sd@[?
a = temp; 7ZAxhFC
} else { 3`SH-"{j%
data[k] = temp[j--]; wsrdBxd5
b = temp[j]; *$VeR(QN
} fuHNsrNlm
} 3C=QWw?
} _o/LFLq
~v"4;A6
/** 1t wC-rC
* @param data L_3Ao'SA
* @param l m r"b/oM{
* @param i F_.rLgGY
*/ )voJq\Y)%
private void insertSort(int[] data, int start, int len) { (Ild>_Tdb`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'c7C*6;a
} .}!"J`{W
} $p:RnH\H1
} "159Q
} L/\s~*:M
n@|5PI"bx
堆排序： T%74JRQ
q@k/"ee*?
package org.rut.util.algorithm.support; LtIp,2GP&_
*\Z9=8yK
import org.rut.util.algorithm.SortUtil; )!z4LE
.n$c+{
/** >TI/W~M
* @author treeroot 'Ur1I"
* @since 2006-2-2 WB)pE'5
* @version 1.0 u@&e{w~0
*/ 0?V{u`*
public class HeapSort implements SortUtil.Sort{ +_E^E
X~UrAG}_
/* (non-Javadoc) 9w3KAca
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?D>%+rK8c
*/ aSse' C<a
public void sort(int[] data) { HxUJ 0Q
MaxHeap h=new MaxHeap(); 1S[4@rZ
h.init(data); &{4KymB:
for(int i=0;i h.remove(); g'X{
System.arraycopy(h.queue,1,data,0,data.length); Ms<v81z5T
} --OAsbr
&=f] a
private static class MaxHeap{ Z.}Z2K
"2 \},o9
void init(int[] data){ tt&#4Z
this.queue=new int[data.length+1]; gQQve{'
for(int i=0;i queue[++size]=data; C6"{-{H
fixUp(size); KWS\iu
} 5J-slNNCQ
} B_DyH C\<
mX2X.ww(4
private int size=0; s4uZ>
OYyF*F&S[
private int[] queue; ''^2rF^
ppuJC'GW
public int get() { %OJ"@6A
return queue[1]; %45*DT
} =Q,D3F -+f
b{BiC&3
public void remove() { XqLR2d
SortUtil.swap(queue,1,size--); i);BTwW)#]
fixDown(1); (I/ZI'Ydy
} M1z ?E@kz
file://fixdown QVF561Yz
private void fixDown(int k) { vs^)=
int j; (fYYcpd,k
while ((j = k << 1) <= size) { o\<JG?P
if (j < size %26amp;%26amp; queue[j] j++; Zd|u>tn
if (queue[k]>queue[j]) file://不用交换 L)i6UAo
break; a8YFH$Xh
SortUtil.swap(queue,j,k); sa}.o ZpQ
k = j; 00LL&ot
} PYwGGB-
} # uy^AC$
private void fixUp(int k) { C1#f/o->
while (k > 1) { SB|Cr:wM
int j = k >> 1; Sc ijf 9
if (queue[j]>queue[k]) Y .E.(\
break; aI>F8R?
SortUtil.swap(queue,j,k); hWiHKR]
k = j; l\"CHwN?Y
} ec,Bu7'8
} 6>3zD)tG
]|N"jr?7H
} nf-6[dg
l*Q OM
} S\ K[l/
}R~C<3u\2
SortUtil： RWB]uHzE
_PLZ_c:O
package org.rut.util.algorithm; o4^#W;%w
E<p<"UjcCJ
import org.rut.util.algorithm.support.BubbleSort; vl!o^_70(
import org.rut.util.algorithm.support.HeapSort; (S?qxW?
import org.rut.util.algorithm.support.ImprovedMergeSort; )+"(7U<
import org.rut.util.algorithm.support.ImprovedQuickSort; >_#A*B|
import org.rut.util.algorithm.support.InsertSort; S#0C^
import org.rut.util.algorithm.support.MergeSort; ?es9j]
import org.rut.util.algorithm.support.QuickSort; BwYR"
import org.rut.util.algorithm.support.SelectionSort; -dw/wHf"
import org.rut.util.algorithm.support.ShellSort; Gx|/ Jq
?IDkDv!na~
/** ug/P>0
* @author treeroot a~k*Gd(
* @since 2006-2-2 R0yp9icS
* @version 1.0 - v=ndJ.
*/ #UnGU,J
public class SortUtil { FC4hvO(/m
public final static int INSERT = 1; >`n)-8
public final static int BUBBLE = 2; ?U,XyxN
public final static int SELECTION = 3; R_IT${O
public final static int SHELL = 4; cr!sq.)s
public final static int QUICK = 5; ']sIU;h3
public final static int IMPROVED_QUICK = 6; '<wZe.Q!
public final static int MERGE = 7; CbMClnF
public final static int IMPROVED_MERGE = 8; '1lz`CAB+
public final static int HEAP = 9; c;'7o=rr
Ct0%3]<J
public static void sort(int[] data) { .Pa6HA !
sort(data, IMPROVED_QUICK); I^QB`%v5
} ,f .#-
private static String[] name={ E;r~8^9)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,`(Qs7)Xx
}; a]x\e{
FFc?Av?_
private static Sort[] impl=new Sort[]{ C2?p>S/q
new InsertSort(), XOzZtt
new BubbleSort(), 0urM@/j+
new SelectionSort(), HF%)ip+
new ShellSort(), lW@i,1
new QuickSort(), 5{#ya2
new ImprovedQuickSort(), T)cbpkH4
new MergeSort(), )eWg2w]
new ImprovedMergeSort(), !7uFH PK-
new HeapSort() jhE3@c@pT
}; ,,(BW7(
V7>{,
public static String toString(int algorithm){ W.<I:q`eO
return name[algorithm-1]; K/LoHWy+n*
} ,:3Di (
_+nlm5
public static void sort(int[] data, int algorithm) { 5,?Au
impl[algorithm-1].sort(data); zC$(/nZ
} @RS|}M^4
.sbV<ulbc
public static interface Sort { E9S&UU,K
public void sort(int[] data); _qhYG1t
} AY%Y,<a
C AF{7 `{
public static void swap(int[] data, int i, int j) { qXQ7Jg9
int temp = data; 6Vc&g
data = data[j]; '|K408i
data[j] = temp; }Z\PE0
} u:&Lf
} n>I NJ