[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; =0,|/1~
} >Q; g0\I_
int i1=l; R]Hz8 _X
int i2=mid+1; WFouoXlG0
for(int cur=l;cur<=r;cur++){ i8K_vo2Z)
if(i1==mid+1) F8;mYuA
data[cur]=temp[i2++]; /vHYMS
else if(i2>r) k@S)j<
data[cur]=temp[i1++]; !X-9Ms}(d
else if(temp[i1] data[cur]=temp[i1++]; _=pWG^a
else G\R*#4cF
data[cur]=temp[i2++]; Z a! gbt
} rn;<HT
} z<!O!wX_aI
FC{})|yh }
} $!f!,fw+
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改进后的归并排序: Pb#P`L7OB
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package org.rut.util.algorithm.support; vv+km+
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import org.rut.util.algorithm.SortUtil; Xh?4mKgu
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/** P1MvtI4gm
* @author treeroot J96uyS*
* @since 2006-2-2 %)?`{O~ h
* @version 1.0 &:<, c12
*/ GF*>~_Yr
public class ImprovedMergeSort implements SortUtil.Sort { RND9D\7
#.H}r6jqs
private static final int THRESHOLD = 10; $E\^v^LW
h$>wv`
/* }9^@5!qX
* (non-Javadoc) Sm)u9
* 7\Co`J>p2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R:M,tL-l
*/ "N 3)Qr
public void sort(int[] data) { "oR@JbdX
int[] temp=new int[data.length]; wPX*%0]
mergeSort(data,temp,0,data.length-1); Br!9x{q*
} V^TbP.
zyFUl%
private void mergeSort(int[] data, int[] temp, int l, int r) { X%4Kj[I^
int i, j, k; %Ds+GM-
int mid = (l + r) / 2; Qs%B'9")
if (l == r) KnGTcoXg_
return; rQb7?O@-
if ((mid - l) >= THRESHOLD) t0Mx!p'T
mergeSort(data, temp, l, mid); T7[NcZ:I
else "hQgLG
insertSort(data, l, mid - l + 1); 'RbQj}@x
if ((r - mid) > THRESHOLD) G69GoT
mergeSort(data, temp, mid + 1, r); V kjuyK
else 0 ipN8Pg+
insertSort(data, mid + 1, r - mid); -DjJ",h( $
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for (i = l; i <= mid; i++) { IeP WOpj3
temp = data; [M%._u,
} @1:0h9%
for (j = 1; j <= r - mid; j++) { iOCqE 5d3
temp[r - j + 1] = data[j + mid]; S\=1_LDx"
} xr%#dVk
int a = temp[l]; tU:EN;H
int b = temp[r]; GpI!J}~m
for (i = l, j = r, k = l; k <= r; k++) { b~w=v_[(I
if (a < b) { iM]o"qOQm
data[k] = temp[i++]; _>yoX
a = temp; 2VGg 6%
} else { NxA)@9Q
data[k] = temp[j--]; Bd~1P/
b = temp[j]; t:)ERT")
} bt$)Xu<R
} B*3Y!!
} [p;E~-S
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/** i+{yMol1
* @param data !?!C'-ps
* @param l 8|%^3O 0X
* @param i D5,P)[
*/ 0#*Lw }qi
private void insertSort(int[] data, int start, int len) { 04U")-\O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /JkC+7H4
} [7FItlF%I
} XB59Vm0E=
} @]aOyb@
} $*R/tJ.
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堆排序： wU\s; dK
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package org.rut.util.algorithm.support; sarq`%zrk
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import org.rut.util.algorithm.SortUtil; :GpDg
d;mx<i=/
/** X;v$5UKU
* @author treeroot ,\2:/>2
* @since 2006-2-2 M-V&X&?j
* @version 1.0 uvP2Wgt
*/ { FZ=olZ
public class HeapSort implements SortUtil.Sort{ RPd}Wf
a] =
/* (non-Javadoc) +l3=3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ig]iT
*/ n_ lo`
public void sort(int[] data) { z4M9M7)"
MaxHeap h=new MaxHeap(); 4lhw3,5
h.init(data); ivDGZI9
for(int i=0;i h.remove(); 4SPy28<f
System.arraycopy(h.queue,1,data,0,data.length); |sRipWh
} M" ^PW,k
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private static class MaxHeap{ Q'_z<V
l2N]a9bq@
void init(int[] data){ b)(?qfXWP
this.queue=new int[data.length+1]; 5p.rwNE
for(int i=0;i queue[++size]=data; r'QnX;99T
fixUp(size); 2{|h8oz
} 4jD2FFG- G
} z~`b\A,$
\]$IDt(s
private int size=0; }!IL]0q
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private int[] queue; 3U_2!zF3_
&gzCteS
public int get() { 8 r_>t2$
return queue[1]; @v}/zS
} R<OI1,..r
4:gRr
public void remove() { ^Q+g({
SortUtil.swap(queue,1,size--); EkziAON
fixDown(1); x?&$ci
} 3}e%[AKh
file://fixdown As>_J=8} 3
private void fixDown(int k) { rRFhGQq1m
int j; ,\NFt`]j
while ((j = k << 1) <= size) { 0jEL<TgC
if (j < size %26amp;%26amp; queue[j] j++; `r?7oxN
if (queue[k]>queue[j]) file://不用交换 i':C)7
break; _4g.j
SortUtil.swap(queue,j,k); YpqrZWvh
k = j; >y,-v:Vy
} rS;Dmm
} ~ 0M'7q'
private void fixUp(int k) { Cg(Y&Gxf.
while (k > 1) { <i,U )Tt^C
int j = k >> 1; 55z]&5N
if (queue[j]>queue[k]) BqT y~{)+
break; AJ=qna
SortUtil.swap(queue,j,k); j:VbrR
k = j; t2)rUWg
} 8SGo9[U2
} w4gJoxY-`
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} 2 O%`G+\)
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} s=;uc]9g
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SortUtil： }|pwz
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package org.rut.util.algorithm; w9bbMx
I"A_b}~*}
import org.rut.util.algorithm.support.BubbleSort; Eqj_m|@
import org.rut.util.algorithm.support.HeapSort; 2%_vXo=I
import org.rut.util.algorithm.support.ImprovedMergeSort; 4GX-ma,
import org.rut.util.algorithm.support.ImprovedQuickSort; .?loO3 m
import org.rut.util.algorithm.support.InsertSort; >7QvK3S4%
import org.rut.util.algorithm.support.MergeSort; ,Pdf,2
import org.rut.util.algorithm.support.QuickSort; 0"pAN[=K@
import org.rut.util.algorithm.support.SelectionSort; ci?qT,&
import org.rut.util.algorithm.support.ShellSort; )% ~OH
lIW }EM
/** 5?]hd*8
* @author treeroot AT2nVakL
* @since 2006-2-2 ?j"KV_
* @version 1.0 8; 0A g
*/ +lHjC$
public class SortUtil { H}hiT/+$
public final static int INSERT = 1; ,g2ij
public final static int BUBBLE = 2; )-a'{W/t
public final static int SELECTION = 3; JzQ)jdvp
public final static int SHELL = 4; SAy=WV
public final static int QUICK = 5; K<>oa[B9
public final static int IMPROVED_QUICK = 6; wAf\|{Vn
public final static int MERGE = 7; wk5s)%V
public final static int IMPROVED_MERGE = 8; ]~'5\58sP
public final static int HEAP = 9; 6WXRP;!Q
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public static void sort(int[] data) { [YlKR'_
sort(data, IMPROVED_QUICK); =THpdtL
} x!5'`A!W%
private static String[] name={ 0jy2H2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <G|(|E1
}; E&2OD [iX
1g8_Xe4
private static Sort[] impl=new Sort[]{ F8jd'OR
new InsertSort(), Azl&mu
new BubbleSort(), J}v}~Cv
new SelectionSort(), vq(0OPj8r[
new ShellSort(), =P't(<
new QuickSort(), J^SdH&%Z
new ImprovedQuickSort(), k_ & :24Lj
new MergeSort(), v%+:/m1
new ImprovedMergeSort(), [q?<Qe
new HeapSort() /:~\5}tW
}; u0|8Tgf
?!A7rb/tj
public static String toString(int algorithm){ z> Rsi
return name[algorithm-1]; >3_jWFq
} a, k'Vk{
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public static void sort(int[] data, int algorithm) { r`W)0oxD
impl[algorithm-1].sort(data); 3!XjtVhK?I
} #@YPic"n7`
R!\_rc1/
public static interface Sort { Ta ?_5
public void sort(int[] data); ,J,/."Y
} e6@=wnoX u
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public static void swap(int[] data, int i, int j) { Q sZx) bO
int temp = data; t<#mP@Mz=N
data = data[j]; KHe=O1 %QO
data[j] = temp; tItX y
} -+(jq>t
} Tl(^