[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; I_|@Fn[>
} C"`,?K(U
int i1=l; 9?8Yf(MC%u
int i2=mid+1; )$[.XKoT
for(int cur=l;cur<=r;cur++){ *&7F(
if(i1==mid+1) ifyWhS++
data[cur]=temp[i2++]; HE>6A|rgDr
else if(i2>r) X=QaTV
data[cur]=temp[i1++]; aj>6q=R
else if(temp[i1] data[cur]=temp[i1++]; xaQO=[
else 0E[&:6#Y
data[cur]=temp[i2++]; 3aL8GMiu
} 8|FHr,
} /CRZ
rVo0H.+N)`
} =1qM`M
2$G,pT1J
改进后的归并排序: vumA W*
#9Src\V
package org.rut.util.algorithm.support; oHo@rGU
q]}fW)r
import org.rut.util.algorithm.SortUtil; ;onhc*{lv
-_<rmR[:]
/** wGRMv1|lIu
* @author treeroot 9 b?Nlk8d
* @since 2006-2-2 ozF173iI
* @version 1.0 yHrYSEM
*/ Rn(6Fk?
public class ImprovedMergeSort implements SortUtil.Sort { BO6u<cu"-
g9N_s,3jC
private static final int THRESHOLD = 10; oT=XCa5
EZICH&_
/* kkA5pbS
* (non-Javadoc) }:6$5/?
* Pe-1o#7~W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >M~wFs$~
*/ QQ1|]/)
public void sort(int[] data) { CF|4, K)
int[] temp=new int[data.length]; &x= PAu
mergeSort(data,temp,0,data.length-1); )SJ18 no|l
} Ft} h&aYP
VV'K$v3'N8
private void mergeSort(int[] data, int[] temp, int l, int r) { x=Ef0v
int i, j, k; tv,Z>&OM
int mid = (l + r) / 2; ZT;8Wvo
if (l == r) 6S`J7[
return; ~hx__^]d
if ((mid - l) >= THRESHOLD) mpcO-%a
mergeSort(data, temp, l, mid); 6 07"Z\
else 0+H4sz%.
insertSort(data, l, mid - l + 1); aaa6R|>0
if ((r - mid) > THRESHOLD) Z4@%0mFll
mergeSort(data, temp, mid + 1, r); &\w:jI44Bs
else Pl2ZA)[g
insertSort(data, mid + 1, r - mid); (g>8!Gl
x(r>iy
for (i = l; i <= mid; i++) { TOH!vQP
temp = data; VMa\?`fT
} tN-U,6c]
for (j = 1; j <= r - mid; j++) { VB(S]N)F^
temp[r - j + 1] = data[j + mid]; ONc-jU^
} Qv v~nGq$
int a = temp[l]; Aw7oyC!
int b = temp[r]; hXF#KVqx
for (i = l, j = r, k = l; k <= r; k++) { s,~p}A%0
if (a < b) { 'f'zV@)
data[k] = temp[i++]; Imv]V6"D=
a = temp; J%|n^^ /un
} else { 1-!q,q
data[k] = temp[j--]; p bRU"
b = temp[j]; |ORro r}
} J~"h&>T
} oZ CvEVUk
} ,)u7PMs
ZKk*2EK]2z
/** ysHmi{V~
* @param data OVy ZyZ#
* @param l {y>o6OTITR
* @param i E:!qncL:
*/ [*{G,=tF`Y
private void insertSort(int[] data, int start, int len) { #RN"Ul-B|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aC2cyUuaN
} ZJZKCdT@
} 06r-@iY.]
} @_:Jm tH<
} |_ChK6Q?v
=~|:93]k
堆排序： 8M5a&35J"
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package org.rut.util.algorithm.support; :\Pk>a
8D)I~0\
import org.rut.util.algorithm.SortUtil; 62YT)/i3
q-k~L\Ys
/** rzk]{W
* @author treeroot udld[f.
* @since 2006-2-2 px7<;(I
* @version 1.0 $>Mqo
*/ \NgBF
public class HeapSort implements SortUtil.Sort{ &IZthJqV
< .\2Ec
/* (non-Javadoc) z]\CI:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q.GA\o
*/ #0F6{&; M
public void sort(int[] data) { o(q][:,h
MaxHeap h=new MaxHeap(); li`4&<WGC
h.init(data); ^y1P~4w?
for(int i=0;i h.remove(); +CQ$-3
System.arraycopy(h.queue,1,data,0,data.length); 7?[{/`k~?
} o5;V=8T;
[0lu&ak[&
private static class MaxHeap{ @/DHfs4O
Q+r8qnL'
void init(int[] data){ p3f>;|uh_
this.queue=new int[data.length+1]; d^.@~
for(int i=0;i queue[++size]=data; kN'.e*
fixUp(size); KcW]"K>p!
} r6x"D3
} Z'@a@Y+
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private int size=0; dM^1O-K:
kr=&x)Wy!
private int[] queue; 4!3mSWNV
|IgH0 zZ
public int get() { 83|7#L
return queue[1]; P p]Ygt'u
} ;DG&HO
4/Wqeq,E8
public void remove() { c!2j+ORz
SortUtil.swap(queue,1,size--); L'KgB=5K&i
fixDown(1); CnvM>]
} X (0`"rjg
file://fixdown L{i,.aE/nO
private void fixDown(int k) { [=otgVteN"
int j; *pOdM0AE
while ((j = k << 1) <= size) { .=u8`,sO
if (j < size %26amp;%26amp; queue[j] j++; sC^9
if (queue[k]>queue[j]) file://不用交换 jQ 'r};;
break; >U2[]fu
SortUtil.swap(queue,j,k); zHT22o56X
k = j; <hvVh9
} r\x"nS
} 4uSC>
private void fixUp(int k) { 2rG;j52))a
while (k > 1) { InCJ4D
int j = k >> 1; 2b`3"S
if (queue[j]>queue[k]) +)cjW"9
break; E#T6rd P
SortUtil.swap(queue,j,k); FVw4BUOmi
k = j; :v(fgS2\
} -9(9LU2
} 0~;Owu
;t_'87h$y
} vnrP;T=^
);~JyoDo
} gTby%6-\|
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SortUtil： jH4'jB
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package org.rut.util.algorithm; Alh"ZT^*
;%/Kh :Vg
import org.rut.util.algorithm.support.BubbleSort; b;AGw3SF
import org.rut.util.algorithm.support.HeapSort; e2@{Ab
import org.rut.util.algorithm.support.ImprovedMergeSort; i!U,qV1
import org.rut.util.algorithm.support.ImprovedQuickSort; W-ctx"9DS
import org.rut.util.algorithm.support.InsertSort; ux 7^PTgcO
import org.rut.util.algorithm.support.MergeSort; Te:4z@?
import org.rut.util.algorithm.support.QuickSort; L]_1z
import org.rut.util.algorithm.support.SelectionSort; 1lf5xm.
import org.rut.util.algorithm.support.ShellSort; 6[{|'
q!sazVaDp
/** Fhr5)Z
* @author treeroot SCUsDr+.
* @since 2006-2-2 &E(KOfk#
* @version 1.0 |hlc#t?
*/ ];n3H~2
public class SortUtil { 7[)IP:I>
public final static int INSERT = 1; wE4:$+R};
public final static int BUBBLE = 2; Q9!T@
public final static int SELECTION = 3; , (Bo .(]
public final static int SHELL = 4; c-dOb.v0
public final static int QUICK = 5; i- v PJg1
public final static int IMPROVED_QUICK = 6; |d@%Vb_
public final static int MERGE = 7; #"6O3.P
public final static int IMPROVED_MERGE = 8; c[h{C!d1
public final static int HEAP = 9; DviRD[+q"
Ns*&;x9
public static void sort(int[] data) { aJmSagr69C
sort(data, IMPROVED_QUICK); >;9+4C<z0
} YVpsf8R
private static String[] name={ 6H)T=Z|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \*(A1Vk
}; j\o<r0I
"%~Jb dx
private static Sort[] impl=new Sort[]{ Y<"BhE
new InsertSort(), ;B,6v P#
new BubbleSort(), (H/2{##
new SelectionSort(), J2ryYdo>
new ShellSort(), ROv(O;.Ty
new QuickSort(), +li<y`aw0
new ImprovedQuickSort(), .h0@Vs
new MergeSort(), zlw+=NX
new ImprovedMergeSort(), 3b#eB
new HeapSort() i 1{Lx)
}; vfn _Nq;
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public static String toString(int algorithm){ L T.u<ThR}
return name[algorithm-1]; LrL ZlJf
} p;P"mp\'
,'KS:`m!
public static void sort(int[] data, int algorithm) { ?c$z?QTMJ
impl[algorithm-1].sort(data); k/hD2tBLu
} Xv~v=.HNhk
L7}dvdtZ0
public static interface Sort { f <,E
public void sort(int[] data); &m8#^]*
} Tgf#I*(^]
dkr[B'n
public static void swap(int[] data, int i, int j) { 8H%-/2NW
int temp = data; WFYbmfmV
data = data[j]; AxsTB9/
data[j] = temp; ,?OWwm&J
} fs:%L
} \9Z1'W