[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; D#1~]d
} 1T,PC?vr{
int i1=l; _l=
int i2=mid+1; UiZp-Y%ki
for(int cur=l;cur<=r;cur++){ i(iP}:3
if(i1==mid+1) Ef!p:HBJ
data[cur]=temp[i2++]; gdE`UZ\
else if(i2>r) ;S`-9}6
data[cur]=temp[i1++]; p30&JJ!~"
else if(temp[i1] data[cur]=temp[i1++]; /t)c fFM
else ~"2@A F
data[cur]=temp[i2++]; ca*[n~np
} yGGB
} :qTcxzV
(<ZkmIXN
} 1DtMY|wP
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改进后的归并排序: .r5oN+?e
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package org.rut.util.algorithm.support; XuoEAu8]
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import org.rut.util.algorithm.SortUtil; /8t+d.r;/
0uO=wOIhH
/** WAXts]=
* @author treeroot m<"fRT!Y
* @since 2006-2-2 RLOQ>vYY
* @version 1.0 yUmsE-W
*/ I''R\Bp
public class ImprovedMergeSort implements SortUtil.Sort { A{x 7
2qMsa>~
private static final int THRESHOLD = 10; ZWRRh^
bH&)rn
/* G? gXK W
* (non-Javadoc) D *I;|.=u
* "Lq|66
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cgxFEv
*/ t{8v(}
public void sort(int[] data) { 56SS >b
int[] temp=new int[data.length]; f H|QAMfOu
mergeSort(data,temp,0,data.length-1); =Z .V+4+
} i(yAmo9h
#t2UPLO~
private void mergeSort(int[] data, int[] temp, int l, int r) { 9_WPWFO
int i, j, k; q6JW@GT
int mid = (l + r) / 2; Xu94v{u3
if (l == r) Z<|_+7T
return; Iei7!KLW
if ((mid - l) >= THRESHOLD) wEnuUC4j
mergeSort(data, temp, l, mid); Sja{$zL+W
else WCmNibj
insertSort(data, l, mid - l + 1); /E{dM2
if ((r - mid) > THRESHOLD) k3>ur>aW
mergeSort(data, temp, mid + 1, r); $W {yK+N
else +}1hU :qW
insertSort(data, mid + 1, r - mid); AOlt,MNpQ
Z\=04[
for (i = l; i <= mid; i++) { j H.Ju|nO
temp = data; jXY;V3l
} SAG`^t
for (j = 1; j <= r - mid; j++) { cP@F #!2
temp[r - j + 1] = data[j + mid]; PL9eUy
} >[H&k8\7n
int a = temp[l]; s|gD
int b = temp[r]; u2-@?yt
for (i = l, j = r, k = l; k <= r; k++) { nz(q)"A
if (a < b) { me:|!lI7YU
data[k] = temp[i++]; ke9QT#~p!-
a = temp; Fb|e]?w
} else { :x""E5H
data[k] = temp[j--]; x #tu
b = temp[j]; ?)mhJ/IT
} _@/C~
} _h1 HuL
} MO~~=]Y'
C?60`^
/** +eBMn(7Cgv
* @param data A!ioji+{[
* @param l FS`vK`'
* @param i XnE %$NJ
*/ C](z#c~c
private void insertSort(int[] data, int start, int len) { i'Y'HI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g>!:U6K
} 2&gd"Ak(
} F8[B^alAe
} p`ADro*
} S?Bc~y
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堆排序： C,{F0-D
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package org.rut.util.algorithm.support; pG!(6V-x<E
nrTv=*tDj
import org.rut.util.algorithm.SortUtil; h eE'S/
WjY{rM,K
/** vr{'FMc
* @author treeroot fwi};)K
* @since 2006-2-2 1C0Y0{6,
* @version 1.0 3'[Rvy{
*/ [arTx^
public class HeapSort implements SortUtil.Sort{ <o&o=Y8
DIG0:)4R.
/* (non-Javadoc) Jtp>m?1Ve
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [;?"R-V"z
*/ jcEs10y
public void sort(int[] data) { f`hyYp`d5
MaxHeap h=new MaxHeap(); egI{!bZg'\
h.init(data); 0~+NB-L}
for(int i=0;i h.remove(); iY ^{wi~?
System.arraycopy(h.queue,1,data,0,data.length); 1m>^{u
} |oe!P}u
?{ B[^
private static class MaxHeap{ TsaW5ho<p
g>~cs_N@
void init(int[] data){ (VYR!(17
this.queue=new int[data.length+1]; DO&+=o`"
for(int i=0;i queue[++size]=data; 83KfM!w
fixUp(size); h_&4p=SQ
} 3z,v#2
} _{6,.TN
~LawF_]6
private int size=0; I!fB1aq-
cq*p9c
private int[] queue; lo+xo;Nd
`E3:;|
public int get() { 2Vp>"
return queue[1]; X,RT<GNNb
} m<FF$pTT
${hyNt
public void remove() { R9tckRG#
SortUtil.swap(queue,1,size--); |H ^w>mk
fixDown(1); N@Xg5huO
} DeOXM=&z
file://fixdown '8)Wd"[
private void fixDown(int k) { -|m$YrzG
int j; 6Xdtr
while ((j = k << 1) <= size) { d?:`n9`
if (j < size %26amp;%26amp; queue[j] j++; r0F_;
if (queue[k]>queue[j]) file://不用交换 aGPqh,<QD
break; Q0V^PDF
SortUtil.swap(queue,j,k); 0jR){G9+
k = j; T>#TDMU#Fm
} w$gSj/
} +w "XNl
private void fixUp(int k) { =m`l%V[
while (k > 1) { EfKM*;A
int j = k >> 1; [O=W>l
if (queue[j]>queue[k]) "A%MVym."
break; ;"1/#CY773
SortUtil.swap(queue,j,k); &&X$d!V
k = j; bt;lq!g
} 9[z'/U.Bn
} /@&(P#h
`$J'UXtGc
} n}19?K]g
I+0c8T(:
} 3PfiQ|/b
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SortUtil： Q>kiVvc
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package org.rut.util.algorithm; aSRjFL^
^~^mR#<P$
import org.rut.util.algorithm.support.BubbleSort; %VzYqj_P"
import org.rut.util.algorithm.support.HeapSort; Q"A_bdg5
import org.rut.util.algorithm.support.ImprovedMergeSort; :I2H&,JT
import org.rut.util.algorithm.support.ImprovedQuickSort; YMi/uy
import org.rut.util.algorithm.support.InsertSort; T3=(`
import org.rut.util.algorithm.support.MergeSort; 49o\^<4b
import org.rut.util.algorithm.support.QuickSort; );=Q] >
import org.rut.util.algorithm.support.SelectionSort; [!W5}=^H
import org.rut.util.algorithm.support.ShellSort; g{e/X~
a;%I\w;2
/** 5)w4)K-%
* @author treeroot SGt5~Txj
* @since 2006-2-2 O47PkP8
* @version 1.0 jQ6Xr&}
*/ >wA+[81[
public class SortUtil { UL&} s_
public final static int INSERT = 1; -(!uC+BZX
public final static int BUBBLE = 2; Kk7GZ
public final static int SELECTION = 3; R6 ;jY/*#
public final static int SHELL = 4; \fTTkpM
public final static int QUICK = 5; "c6<zP
public final static int IMPROVED_QUICK = 6; bV_j`:MD
public final static int MERGE = 7; i&JpM]N
public final static int IMPROVED_MERGE = 8; |7y6 pz
public final static int HEAP = 9; [~COYjp
+@e }mL\8
public static void sort(int[] data) { J<rlz5':
sort(data, IMPROVED_QUICK); :i.t)ES
} m;c3Z-
private static String[] name={ 6Z Xu,ks}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x.ba|:5
}; hqL+_|DW
8yn4}`Nc@
private static Sort[] impl=new Sort[]{ /N>} 4Ay
new InsertSort(), {#N%Bq}
new BubbleSort(), E30Ln_^o
new SelectionSort(), *,17x`1e
new ShellSort(), t ^m~
new QuickSort(), >Co)2d]
new ImprovedQuickSort(), "CMucK
new MergeSort(), [,rn3CA
new ImprovedMergeSort(), 7{4w2)
new HeapSort() YGETMIT(
}; f~q4{
8fh4%#,C%
public static String toString(int algorithm){ 5Dd:r{{ Q
return name[algorithm-1]; s"WBw'_<<
} $C uR}g
6x/s|RWL1
public static void sort(int[] data, int algorithm) { }-74f
impl[algorithm-1].sort(data); 9mDnKW
} <6/= y1QC)
0'`S,
public static interface Sort { 6lsEGe
public void sort(int[] data); `"c'z;
} `;$h'eI9
->h5T%sn
public static void swap(int[] data, int i, int j) { "TNVD"RLY
int temp = data; QXs8:;T
data = data[j]; KzNm^^#/$A
data[j] = temp; { D+Ym%n
} w.z<60%},0
} ~@D/A/|