[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; [9 W@<p
} e$# *t
int i1=l; 4:`D3
int i2=mid+1; \^x{NV@v42
for(int cur=l;cur<=r;cur++){ xN1P#
if(i1==mid+1) O G`8::S
data[cur]=temp[i2++]; ,/42^|=Z6O
else if(i2>r) m`/Nl<
data[cur]=temp[i1++]; 9iA rBL"
else if(temp[i1] data[cur]=temp[i1++]; rbZbj#
else @5Xo2}o-Q
data[cur]=temp[i2++]; =V^-@ji)b
} '5e,@t%y
} c3$T3Lu1
C=:<[_m`
} VdLoi\-/L
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改进后的归并排序: T@ c~ql
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package org.rut.util.algorithm.support; Zf'*pp T&q
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import org.rut.util.algorithm.SortUtil; a.Ho>(V/4
3JCo!n0
/** ]&cnc8tC
* @author treeroot :xd;=;q5
* @since 2006-2-2 qJhsMo2IH
* @version 1.0 1Kg0y71"
*/ f7Gn$E|/r;
public class ImprovedMergeSort implements SortUtil.Sort { )@PnpC%H
L, JQ\!c
private static final int THRESHOLD = 10; ?'a8QJo
JMb_00r
/* oQ$yr^M
* (non-Javadoc) s]arNaaA
* bSB%hFp=Cp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;G[V:.o-
*/ 4,9$udiGY
public void sort(int[] data) { j[>cv;h ;
int[] temp=new int[data.length]; *{g3ia
mergeSort(data,temp,0,data.length-1); 3H,E8>Vd
} +P/kfY"
asT-=p_ 0.
private void mergeSort(int[] data, int[] temp, int l, int r) { g^AQBF
int i, j, k; N[%u>!
int mid = (l + r) / 2; T$4{fhV \
if (l == r) Sc)^k
return; _?{7%(C
if ((mid - l) >= THRESHOLD) JK k0f9)
mergeSort(data, temp, l, mid); C?PQ>Q!f-
else Z_d"<k}I
insertSort(data, l, mid - l + 1); "yWw3(V2>
if ((r - mid) > THRESHOLD) uO?+vYAN
mergeSort(data, temp, mid + 1, r); )!T~l(g
else 2]>O ZhS
insertSort(data, mid + 1, r - mid); @<.@X*#I
Gw M:f/eV
for (i = l; i <= mid; i++) { (3#PKfY+
temp = data; 5KCB^`|b>t
} &V"oJ}M/a
for (j = 1; j <= r - mid; j++) { !X>u.}?g
temp[r - j + 1] = data[j + mid]; e+ xQ\LH
} Sj9fq*
int a = temp[l]; YOCEEh?
int b = temp[r]; $.G 7Vt
for (i = l, j = r, k = l; k <= r; k++) { Dl,QCZeM
if (a < b) { 9&6juL
data[k] = temp[i++]; c}(WniR-"
a = temp; *@U{[J
} else { &#r+a'
data[k] = temp[j--]; -yqsJGY
b = temp[j]; >I5:@6 Z
} B9v>="F
} T1LYJ]5
} 80xrzv
HU3:6R&
/** +7Ws`qhEe
* @param data pLMt2G
* @param l Sg#XcTG
* @param i 9}573M
*/ zWsr|= [
private void insertSort(int[] data, int start, int len) { i\R0+O{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OM*_%UF
} Y\|#Lu>B
} &C 9hT
} 3h@]cWp
} FpoHm%+
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堆排序： LPk@t^[
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package org.rut.util.algorithm.support; Kxe\H'rR
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import org.rut.util.algorithm.SortUtil; ]9@:7d6
*S$vSDJCW
/** C2 N+X(
* @author treeroot c9(3z0!F?
* @since 2006-2-2 ] V D
* @version 1.0 +v~xgUs
*/ i"{O~[
public class HeapSort implements SortUtil.Sort{ e#Tv5O
TpjiKM
/* (non-Javadoc) m]p{]6h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q*ITs!~Z
*/ \pmS*Dt
public void sort(int[] data) { K$E3RB_F
MaxHeap h=new MaxHeap(); (In{GA7;
h.init(data); f/Gx}x=
for(int i=0;i h.remove(); 53Adic
System.arraycopy(h.queue,1,data,0,data.length); &L o TO+
} U82a]i0
#Z&/w.D2
private static class MaxHeap{ 1? >P3C
nt.LiM/L
void init(int[] data){ QX,$JM3
this.queue=new int[data.length+1]; kZ]H[\Fs
for(int i=0;i queue[++size]=data; GP:<h@:798
fixUp(size); =BJLj0=N
} %sa?/pjK
} j"W>fC/u
4u{S?Ryy
private int size=0; Y&|Z*s+ +}
6FS%9.Ws
private int[] queue; bR\7j+*&
XS<>0YM
public int get() { $vn6%M[
return queue[1]; sdp&D@
} 2e48L677-
d;i|s[6ds`
public void remove() { A5l Cc b
SortUtil.swap(queue,1,size--); ts]e M1;
fixDown(1); FU`(mQ*Yd
} *$p*'vR
file://fixdown 5Qgu:)}
private void fixDown(int k) { 2"/MM2s
int j; l#)X/(?;
while ((j = k << 1) <= size) { {UiSa'TR1b
if (j < size %26amp;%26amp; queue[j] j++; `oRyw6Sko
if (queue[k]>queue[j]) file://不用交换 3?OQ-7,
break; sXLW';Fz
SortUtil.swap(queue,j,k); ^FCXcn9
k = j; :X2_#qW#C
} }{0}$#zu
} F72#vS j
private void fixUp(int k) { So%X(, |
while (k > 1) { "N4^ ^~s
int j = k >> 1; z]7 WC
if (queue[j]>queue[k]) r>mBe;[TX
break; u6iW1,#
SortUtil.swap(queue,j,k); Dy08.Sss
k = j; b,!C8rJ
} !R{IEray
} JsaXI:%1
\!KE_7HRu
} ?Y=aO(}=h
1]xk:u4LA
} CEfqFn3^
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SortUtil： n Ja!&G&
r6<;bO(
package org.rut.util.algorithm; S ?Zh#`(*
s{^98*
import org.rut.util.algorithm.support.BubbleSort; }D1x%L
import org.rut.util.algorithm.support.HeapSort; G?Et$r7:R
import org.rut.util.algorithm.support.ImprovedMergeSort; `kKssU<
import org.rut.util.algorithm.support.ImprovedQuickSort; 8}%F`=Y0
import org.rut.util.algorithm.support.InsertSort; pwSgFc$z
import org.rut.util.algorithm.support.MergeSort; iUkUo x
import org.rut.util.algorithm.support.QuickSort; 5(;Y&?k
import org.rut.util.algorithm.support.SelectionSort; Ou[K7-m%&
import org.rut.util.algorithm.support.ShellSort; p.8bX
$<*) 5|6
/** B4s$| i{D
* @author treeroot n,T &n
* @since 2006-2-2 VFE@qX|
* @version 1.0 HZrA}|:h
*/ J+D|/^
public class SortUtil { :UwBs
public final static int INSERT = 1; KQ~y;{h?b
public final static int BUBBLE = 2; Omd;
public final static int SELECTION = 3; ss^a=?~
public final static int SHELL = 4; RhYe=Qh4{p
public final static int QUICK = 5; ~DH9iB
public final static int IMPROVED_QUICK = 6; J,$xQ?,wE
public final static int MERGE = 7; .jRI $vm
public final static int IMPROVED_MERGE = 8; Y1r$;;sH
public final static int HEAP = 9; 1UQ,V`y
xU'z>y4V$
public static void sort(int[] data) { XQ1]F{?/H
sort(data, IMPROVED_QUICK); 18$d-[hX
} H3wJ5-q(
private static String[] name={ \p^V~fy7rU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G1|1Z5r
}; i0M6;W1T
Lf_Y4a#
private static Sort[] impl=new Sort[]{ n%Oi~7>
new InsertSort(), ^^q&VL
new BubbleSort(), ~cU1 /CW8
new SelectionSort(), d+n2 c`i
new ShellSort(), {lK2yi
new QuickSort(), <ZT C^=3
new ImprovedQuickSort(), eP~bl
new MergeSort(), wd:Yy
new ImprovedMergeSort(), 9qX$
new HeapSort() YS3~sA
}; WZa6*pF
@@R Mm$
public static String toString(int algorithm){ ]*dYX=6
return name[algorithm-1]; s|IBX0^@
} OvH:3"Sdy
sRB=<E*_
public static void sort(int[] data, int algorithm) { |v+z*}fKw
impl[algorithm-1].sort(data); 9J:|"@)N
} l|q-kRRjn
9nY`rF8@
public static interface Sort { %/dOV[/
public void sort(int[] data); t 7Y*/v&P(
} sY<UJlDKT
r8"2C#
public static void swap(int[] data, int i, int j) { =gF035
int temp = data; 6R :hsC$
data = data[j]; w!lk&7Q7Z
data[j] = temp; [kg^S`gc#
} qV=:2m10x
} ):N#X<b':