[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; vz#rbBY*;
} UqsVqi h(
int i1=l; r*p<7
int i2=mid+1; NyeGa
for(int cur=l;cur<=r;cur++){ V\r5
if(i1==mid+1) zYbSv~)
data[cur]=temp[i2++]; M$FQoRwH
else if(i2>r) :@`Ll;G
data[cur]=temp[i1++]; f:KKOLm
else if(temp[i1] data[cur]=temp[i1++]; =xS(Er`r
else n^UrHHOL
data[cur]=temp[i2++]; iKv{)5
} >C*q
} 1WfN_JKB5
Y6?d y\
} <fJoHS
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改进后的归并排序: KNic$:i
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package org.rut.util.algorithm.support; 38>8{Ma
f]h99T
import org.rut.util.algorithm.SortUtil; CTD{!I(
-9UQs.Nv
/** .o]vjNrd/
* @author treeroot *QG>U[
* @since 2006-2-2 Y@Lv>p
* @version 1.0 BikmAa
*/ 6*A S4l
public class ImprovedMergeSort implements SortUtil.Sort { ME>OTs
|FS79Bv
private static final int THRESHOLD = 10; OU]!2[7c
v< xe(dC
/* j;=+5PY
* (non-Javadoc) E@}t1!E<
* S@k4k^Vg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @-NdgM<
*/ WID4{>G2
public void sort(int[] data) { >/.-N
int[] temp=new int[data.length]; =4RnXZ[P0
mergeSort(data,temp,0,data.length-1); u%Hegqn
} 6w0/;8(_m
%t([
private void mergeSort(int[] data, int[] temp, int l, int r) { 0vqXLFf
int i, j, k; ]>b.oI/
int mid = (l + r) / 2; :K#'?tH
if (l == r) 1,p7Sl^h
return; |>gya&
if ((mid - l) >= THRESHOLD) ^+Ie
mergeSort(data, temp, l, mid); #VgPg5k.<
else y"<nx3
insertSort(data, l, mid - l + 1); CSN]k)\N(
if ((r - mid) > THRESHOLD) [;7&E{,C
mergeSort(data, temp, mid + 1, r); GO.mT/rB
else O'Lgb9
insertSort(data, mid + 1, r - mid); ;_@u@$=~
9*h?g+\
for (i = l; i <= mid; i++) { ;$ D*,W *
temp = data; ]S[M]-I
} 6#MIt:#
for (j = 1; j <= r - mid; j++) { !_QE|tVeR
temp[r - j + 1] = data[j + mid]; lM3UjR|@
} n-be8p)-
int a = temp[l]; *r6+Vz
int b = temp[r]; puV(eG
for (i = l, j = r, k = l; k <= r; k++) { ytf.$P
if (a < b) { \S{ise/U
data[k] = temp[i++]; C_rlbl;T
a = temp; T$U,rOB"
} else { 5}x^0 LY
data[k] = temp[j--]; w^s|YF=c
b = temp[j]; _n,Ye&m
} gI~Ru8
} (|(#~o]40t
} JK4vQWy
_Y4%Fv>@
/** t4R=$ km
* @param data Wsyq
* @param l x{`>Il
* @param i bF;g.-.2
*/ +!\$SOaR{
private void insertSort(int[] data, int start, int len) { R3`!Xj#&M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )@Fuw*
} 8%S5Fc#am
} _5uzu6:y
} 56;lB$)"
} Cb~_{$A
/~yk
堆排序： -&I)3
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package org.rut.util.algorithm.support; R#eY@N}\
v)mO"\
import org.rut.util.algorithm.SortUtil; ZW{pO:-
^a#Vp
/** R#.FfWTZ
* @author treeroot sPuNwVX>}I
* @since 2006-2-2 W-ErzX
* @version 1.0 u=I\0H
*/ N2[EdOJT_
public class HeapSort implements SortUtil.Sort{ w#_/CUL
PTfTT_t
/* (non-Javadoc) o(Yj[:+m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T$RVz
*/ -$WU-7`
public void sort(int[] data) { 59A@~;.F
MaxHeap h=new MaxHeap(); f'` QW@U
h.init(data); )F Q '^
for(int i=0;i h.remove(); B~K@o.%
System.arraycopy(h.queue,1,data,0,data.length); 1|_jV7`Mz
} jHBzZ!<
r8x<-u4
private static class MaxHeap{ x?v/|
Z+!._uA
void init(int[] data){ =:OS"qD3l
this.queue=new int[data.length+1]; s4uZ;
for(int i=0;i queue[++size]=data; `1aEV#;
fixUp(size); @2ZE8O#I
} lArYlR}
} FGY4u4y
= s^KZV
private int size=0; =oz$uD}?
]f#1G$
private int[] queue; Loo48
c `C /U7j
public int get() { >|Ps23J#
return queue[1]; 7<;87t]]
} <RH2G
/qp)n">
public void remove() { nA$zp
SortUtil.swap(queue,1,size--); %2>ya>/M
fixDown(1); jI:5[. Y
} C\#E1\d
file://fixdown uf4C+ci
private void fixDown(int k) { 32j@6!
int j; I*8i=O@0T
while ((j = k << 1) <= size) { 3~v'Ev
if (j < size %26amp;%26amp; queue[j] j++; Sxo9y0K8-
if (queue[k]>queue[j]) file://不用交换 oRmz'F
break; =g)|g+[H
SortUtil.swap(queue,j,k); y qDE|DIez
k = j; &!7{2E\7C
} Plpt7Pa_
} ig|ol*~
private void fixUp(int k) { M{M>$pt
while (k > 1) { !@j5yYf
int j = k >> 1; w$%d"Jm#X
if (queue[j]>queue[k]) g*]Gc%
break; }Jfi"L
SortUtil.swap(queue,j,k); t:|knZq
k = j; P(B:tg
} KtH-QQDluj
} Bs7/<$9K/
mT enzIp
} =To}yJ#
0G@sj7)]
} h2M>4c
!##OQ
SortUtil： 7&-i :2
Ps=OL\i
package org.rut.util.algorithm; B+W 4r9#
cVCylRU"
import org.rut.util.algorithm.support.BubbleSort; ON"F h'?
import org.rut.util.algorithm.support.HeapSort; i`#5dIb
import org.rut.util.algorithm.support.ImprovedMergeSort; ^0"W/
import org.rut.util.algorithm.support.ImprovedQuickSort; M;s r1C
import org.rut.util.algorithm.support.InsertSort; 6XU1w
import org.rut.util.algorithm.support.MergeSort; 8JYF0r7
import org.rut.util.algorithm.support.QuickSort; n *Y+y
import org.rut.util.algorithm.support.SelectionSort; %C}TdG(C
import org.rut.util.algorithm.support.ShellSort; b|_Pt
VsLlPw{
/** aNn\URR
* @author treeroot ?8dd^iX/
* @since 2006-2-2 ;.Dm?J0
* @version 1.0 o\ss
*/ s'/b&Idf8
public class SortUtil { #bk[Zj&
public final static int INSERT = 1; k4WUfL d
public final static int BUBBLE = 2; L{XNOf3
public final static int SELECTION = 3; rO#WG}E<"
public final static int SHELL = 4; ="X2AuK%1$
public final static int QUICK = 5; Z*,Nt6;e
public final static int IMPROVED_QUICK = 6; mWhQds6
public final static int MERGE = 7; =/_tQR~
public final static int IMPROVED_MERGE = 8; sJA` A
public final static int HEAP = 9; 6KT]3*B
`+Ko{rf+9
public static void sort(int[] data) { ]r6S|;:
sort(data, IMPROVED_QUICK); JQSp2b@'H
} )L^GGy8w
private static String[] name={ |#uA(V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @JFfyQ {-
}; -44{b<:D
!cblmF;0
private static Sort[] impl=new Sort[]{ zT_
new InsertSort(), BT[jD}?
new BubbleSort(), <~wr;"S
new SelectionSort(), 5!GL"
new ShellSort(), fyb:eO}
new QuickSort(), h?UUd\RU)
new ImprovedQuickSort(), bo>4:i
new MergeSort(), P'wn$WE[n\
new ImprovedMergeSort(), (A@~]N,U/
new HeapSort() Z+# =]Kw)
}; ^Bkwbj
`R\aNgCS}
public static String toString(int algorithm){ TV^m1uC
return name[algorithm-1]; h%2;B;p]
} h?cf)L
|ATz<"q>
public static void sort(int[] data, int algorithm) { WX2:c,%:
impl[algorithm-1].sort(data); ey icMy`7{
} 5G$sP,n
QOb+6qy:3
public static interface Sort { R<"fcsU
public void sort(int[] data); f8Z[prfP
} V_)G=#6Dy
(+M]C]
public static void swap(int[] data, int i, int j) { >j&+mii
int temp = data; _tl
data = data[j]; 6I5,PB
data[j] = temp; H83Gx;
} *OoM[wEY
} v$H=~m