[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; @w:6m&KL9
} NgH"jg-
int i1=l; d9@!se9&Z
int i2=mid+1; K& / rzs-
for(int cur=l;cur<=r;cur++){ U)mg]o-VE
if(i1==mid+1) =<~/U?
data[cur]=temp[i2++]; `}uOlC]I
else if(i2>r) 3e~X`K1Q<
data[cur]=temp[i1++]; 96M?tTa
else if(temp[i1] data[cur]=temp[i1++]; e]N?{s
else G;r-f63N
data[cur]=temp[i2++]; 'Y`.0T[&
} QI\&D)
} @k.j6LKbc
GMD>Ih.k:9
} gHCk;dmq81
oB$7m4xO\
改进后的归并排序: -?)` OHc^
w s(9@
package org.rut.util.algorithm.support; @mM])V
OFS`?>
import org.rut.util.algorithm.SortUtil; E*rnk4Y
pC9Ed9uRK
/** -8F~Tffx
* @author treeroot }*0OLUFFJ
* @since 2006-2-2 L_$M9G|5n
* @version 1.0 aBL+i-
*/ \g|u|Y.2[
public class ImprovedMergeSort implements SortUtil.Sort { 8'c_&\kdv
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private static final int THRESHOLD = 10; ZT@a2:&
|cZKj|0>
/* Id->F0x0
* (non-Javadoc) 5$SO
* iM'{,~8R5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {UX[SAQ
*/ 3PS(1
public void sort(int[] data) { q r12"H
int[] temp=new int[data.length]; XsE] Z4
mergeSort(data,temp,0,data.length-1); :{pJ
} []e*Io&[
?V|t7^+:
private void mergeSort(int[] data, int[] temp, int l, int r) { k:D;C3vJd
int i, j, k; q!l[^t|;
int mid = (l + r) / 2; ==d@0`
if (l == r) G[U'-a}I
return; Vj.5b0/(
if ((mid - l) >= THRESHOLD) y~jKytq^@
mergeSort(data, temp, l, mid); 4BSSJ@z
else wr\d5j
insertSort(data, l, mid - l + 1); Z$h39hm?c
if ((r - mid) > THRESHOLD) &^-quzlZ
mergeSort(data, temp, mid + 1, r); K>H_q@-?f
else X2#;1 ku
insertSort(data, mid + 1, r - mid); /mST<{(_G\
-#XNZy!//
for (i = l; i <= mid; i++) { imE5$;
temp = data; lH_S*FDa
} ,$ICv+7]
for (j = 1; j <= r - mid; j++) { <{\UE~
temp[r - j + 1] = data[j + mid]; ^%|(dMo4
} cpV:y
int a = temp[l]; nU Oy-c
int b = temp[r]; eit>4xMu
for (i = l, j = r, k = l; k <= r; k++) { MYqxkhcLH1
if (a < b) { *.ffyBI*~
data[k] = temp[i++]; ^FLuhLS\*
a = temp; 7 R1;'/;
} else { Z4#lZS`'A
data[k] = temp[j--]; /uSEG<D
b = temp[j]; aO@zeKg
} 0-dhGh?.
} m .2)P~a
} G:qkk(6_#
~5aq.hF1,A
/** ,nO:Pxn|
* @param data =Ewa}$-
* @param l l\8l.xP
* @param i ldJeja~Xl
*/ r1cB<-bJ#'
private void insertSort(int[] data, int start, int len) { HaeF`gI^Ee
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >c~~i-=
} =U3,P%
} J[<3Je=>$
} ^=)? a;V
} ,wmPK;j
`m5cU*@D
堆排序： htg+V-,
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package org.rut.util.algorithm.support; l'N>9~f
UQz8":#V
import org.rut.util.algorithm.SortUtil; wL 5p0Xl
_96hw8
/** O2{_:B>K[
* @author treeroot x9PEYhL?
* @since 2006-2-2 !F{5"$
* @version 1.0 * wN+Ak q
*/ UP:+1Sp9
public class HeapSort implements SortUtil.Sort{ &libC>a[
3"'|Ql.H
/* (non-Javadoc) ]3#_BL)M8p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U[~BW[[@f
*/ ~..h=
public void sort(int[] data) { tZ1iaYbvV
MaxHeap h=new MaxHeap(); wxPg*R+t
h.init(data); ih1s`CjG
for(int i=0;i h.remove(); [_j.pMH/P
System.arraycopy(h.queue,1,data,0,data.length); FE1dr_i
} kl[bDb1p
%>cc%(POO
private static class MaxHeap{ Uc e#v)
`xbk)oW#
void init(int[] data){ EAFKf*K=
this.queue=new int[data.length+1]; w&;\}IS
for(int i=0;i queue[++size]=data; Ov%9S/d
fixUp(size); 6X5m1+ Oi^
} De|@}@
} PpN+q:(
&K k+RHM
private int size=0; ;D]TPBE
(JFa
private int[] queue; kYs2AzS{d
hmkcWr`
public int get() { <2y~7h:
return queue[1]; FQi"OZHq
} RCNqHYR
V&KH{j/P
public void remove() { M:?eK [h
SortUtil.swap(queue,1,size--); M 0->
fixDown(1); ?MeP<5\A
} _}Jz_RS2`
file://fixdown Yl1@gw7
private void fixDown(int k) { zEY Ey1
int j; >T~{_|N
while ((j = k << 1) <= size) { l;Zc[6
if (j < size %26amp;%26amp; queue[j] j++; CT4R/wzY7
if (queue[k]>queue[j]) file://不用交换 +C\?G/
break; KnZm(c9+
SortUtil.swap(queue,j,k); pM[UC{
k = j; F5L/7j<}
} OR&+`P"-\
} wlKpHd*
private void fixUp(int k) { @tjC{?5Y
while (k > 1) { \{?v|%n=/i
int j = k >> 1; ~"EkX
if (queue[j]>queue[k]) oG@P M+{
break; *goi^Xp
SortUtil.swap(queue,j,k); OY~5o&Oa
k = j; ?vf{v
} 7Yj\*N
} $Ry NM2YI
/[nt=#+
} J+?xfg
\ox:/-[c\<
} C&Nd|c
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SortUtil： 2T?t[;-
u[2R>=
package org.rut.util.algorithm; (U/[i.r5Cj
!^q<)!9<EO
import org.rut.util.algorithm.support.BubbleSort; mMT7`r;l
import org.rut.util.algorithm.support.HeapSort; -lSm:O@'
import org.rut.util.algorithm.support.ImprovedMergeSort; 9'//_ A,
import org.rut.util.algorithm.support.ImprovedQuickSort; @zfeCxVOA
import org.rut.util.algorithm.support.InsertSort; .:RoD?px
import org.rut.util.algorithm.support.MergeSort; [Z Ea3/
import org.rut.util.algorithm.support.QuickSort; Bb:jy!jq_
import org.rut.util.algorithm.support.SelectionSort; *N'B(j/
import org.rut.util.algorithm.support.ShellSort; ?\\ ]u
h"%6tpV-
/** @292;qi
* @author treeroot J+DuQ;k;
* @since 2006-2-2 LZ&CGV"Z-
* @version 1.0 #3u8BLy$Q
*/ =K8`[iH
public class SortUtil { Q1eiU Y6
public final static int INSERT = 1; |7%$+g
public final static int BUBBLE = 2; Y!&dj95y
public final static int SELECTION = 3; >47,Hq:2
public final static int SHELL = 4; uX}M0W
public final static int QUICK = 5; by6E "7%
public final static int IMPROVED_QUICK = 6; `5e#9@/e
public final static int MERGE = 7; NqqLRgMOR'
public final static int IMPROVED_MERGE = 8; z8z U3?
public final static int HEAP = 9; wm2Q(l*HH
(nda!^f_s
public static void sort(int[] data) { jIdhmd* $z
sort(data, IMPROVED_QUICK); ,PN>,hFL
} ={maCYlE.
private static String[] name={ =Z-.4\3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i-E&Y*\^9H
}; )J#@L*
62vz 'b
private static Sort[] impl=new Sort[]{ YVW!u6W'[6
new InsertSort(), T/S-}|fhQ
new BubbleSort(), ,u]kZ]
new SelectionSort(), J_P2%b=C
new ShellSort(), 4TR:bQZs
new QuickSort(), 6dq U4
new ImprovedQuickSort(), )sNtwSl^
new MergeSort(), v/yk T9@;
new ImprovedMergeSort(), /.WD'*H
new HeapSort() gn(n</\/O
}; 3v0)oK
Nt/*VYUn
public static String toString(int algorithm){ HM[BFF[;/
return name[algorithm-1]; kFk+TXLDIt
} \D}/tz5~B
iv;;GW{2
public static void sort(int[] data, int algorithm) { $/wr?
impl[algorithm-1].sort(data); `hH1rw@7<
} =}c~BHT
I/^Lr_\
public static interface Sort { ?'_iqg3
public void sort(int[] data); NpRC3^
} L7Skn-*tnA
mbS &>
public static void swap(int[] data, int i, int j) { UhEJznfi
int temp = data; &x=<>~Ag3
data = data[j]; 89 (k<m
data[j] = temp; 5gJQr%pS
} SH}O?d\Q:
} Y}f%/vus