[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; mE_?E&T`|
} Y[ toN9,
int i1=l; D7b] ;Nf\
int i2=mid+1; Ea[K$NC)#
for(int cur=l;cur<=r;cur++){ ukRbSJ5a5
if(i1==mid+1) M&K'5G)7
data[cur]=temp[i2++]; djtCv;z
else if(i2>r) Qa=v }d-O
data[cur]=temp[i1++]; cYp]zn+6
else if(temp[i1] data[cur]=temp[i1++]; f\gN+4)
else M2e_)f:
data[cur]=temp[i2++]; N!:&Xz
} c2<JS:!*
} Zo|# ,AdE>
8!{F6DG
} Zb=H\#T
s@vHU4
改进后的归并排序: z>X<Di&x)
v9s/!<j
package org.rut.util.algorithm.support; %JC-%TRWK
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import org.rut.util.algorithm.SortUtil; 0(!D1G{ul
Ks@
/** &c)n\x*
* @author treeroot `-L{J0xq
* @since 2006-2-2 oO8V0VE\
* @version 1.0 m#a0HH
*/ TS{ycGY
public class ImprovedMergeSort implements SortUtil.Sort { (\<#fkeH
\-B8`ah
private static final int THRESHOLD = 10; Una7O]
jNa'l<dn]
/* Gn_rf"
* (non-Javadoc) Oy^)lF/
* n2$(MDdL`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )ieT/0nt
*/ s*k[Fbi
public void sort(int[] data) { b+.P4+
int[] temp=new int[data.length]; ^%V^\DK
mergeSort(data,temp,0,data.length-1); -kVt_
} L`Lro:E?kL
QVVR_1Q
private void mergeSort(int[] data, int[] temp, int l, int r) { 9fyJw1
int i, j, k; Qyr^\a;k'
int mid = (l + r) / 2; Rs0O4.yi;@
if (l == r) Bu\:+3)
return; `is."]%f
if ((mid - l) >= THRESHOLD) l H@hV
mergeSort(data, temp, l, mid); 7r?s)ZV
else %,G&By&,
insertSort(data, l, mid - l + 1); JlZU31Xws
if ((r - mid) > THRESHOLD) -c"nx$
mergeSort(data, temp, mid + 1, r); D)ZGTq`(
else [4u.*oL&
insertSort(data, mid + 1, r - mid); y3 vDKZ
&"(xd@V)]A
for (i = l; i <= mid; i++) { cg-\|H1
temp = data; $d]3ek/
} lj{Jw.t
for (j = 1; j <= r - mid; j++) { zoUM<6q
temp[r - j + 1] = data[j + mid]; a&3pPfC
} |]tIE{d
int a = temp[l]; "Cz8nG
int b = temp[r]; '+6SkZ
for (i = l, j = r, k = l; k <= r; k++) { 6tC0F=
if (a < b) { Lc<v4Bp
data[k] = temp[i++]; TmZ% ;TN
a = temp; gq|T:
} else { cN}Aeo
data[k] = temp[j--]; .""?k[f5Q
b = temp[j]; 0=3Av8
} 1Y2]jz4
} 7q2G/_
} {s8v0~
/0PBY-O
/** \>b :
* @param data 8[zux4<m
* @param l .DzFtc
* @param i ,i>{yrsOh
*/ K"%_q$[YQ
private void insertSort(int[] data, int start, int len) { D<-MbK^S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); llbf(!
} X,)`< >=O
} 8T&.8r
} Sn(e@|!G
} 8.9Z0
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堆排序： nH6Ny
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package org.rut.util.algorithm.support; Ev adY
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import org.rut.util.algorithm.SortUtil; #le1 ^ <w7
4<j)1i=A
/** 2pKkg>/S
* @author treeroot l70a&[W
* @since 2006-2-2 r#svj*dn
* @version 1.0 yK1@`3@?
*/ ]LcCom:]
public class HeapSort implements SortUtil.Sort{ ~F gxhK2+
X+0+}S
/* (non-Javadoc) }0Q_yuzx0m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V 6DWYs>
*/ _h?hFs,N]
public void sort(int[] data) { 41Y1M]`=
MaxHeap h=new MaxHeap(); v:$Ka@v6
h.init(data); qK_jgj=w
for(int i=0;i h.remove(); M>eMDCB\
System.arraycopy(h.queue,1,data,0,data.length); b3'U}0Ug
} T?4pV#
oGtz*AP%
private static class MaxHeap{ ~Ox !7Lp
}Kt`du=
void init(int[] data){ 2=\} 0
this.queue=new int[data.length+1]; Nk#[~$Q-1
for(int i=0;i queue[++size]=data; 3FD6.X>x
fixUp(size); })?t:zX#*
} DJ zJ$Q
} F gi&CJ8Q
HLlp+;CF><
private int size=0; bdS
|Ok@:Au
private int[] queue; Xr B)[kQ
t<F*ODn
public int get() { uWtj?Q+M|
return queue[1]; ZNHlq5
} ,/oqLI\
xF/u('A
public void remove() { JX.3b_O
SortUtil.swap(queue,1,size--); 8^ujA
fixDown(1); -z s5WaJn/
} {IB}g:
file://fixdown zs=[C+Z\
private void fixDown(int k) { [>IV#6$
int j; !R`E+G@
while ((j = k << 1) <= size) { 8M<\?JD~_f
if (j < size %26amp;%26amp; queue[j] j++; jTeHI|b
if (queue[k]>queue[j]) file://不用交换 "j2th.
break; u~]O #v
SortUtil.swap(queue,j,k); uK6'TJ
k = j; n'5LY9"
} ;2k!KW@
} o)V@|i0Js
private void fixUp(int k) { Z9)-kRQz=r
while (k > 1) { R^hlfKnt
int j = k >> 1; *F^t)K2
if (queue[j]>queue[k]) /h(bMbZ
break; NFsCq_f
SortUtil.swap(queue,j,k); {^z>uRZ3
k = j; |E}-j;(
} prk@uYCa =
} Wx:He8N] H
d-rqZn}
} ehpU`vQz
e|-%-juI
} ?@>PKUv{
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SortUtil： *^+]`S
j5Cf\*B4J
package org.rut.util.algorithm; hFQ*50n}
(:9=M5d
import org.rut.util.algorithm.support.BubbleSort; k#oe:u`<
import org.rut.util.algorithm.support.HeapSort; 'PS_|zI
import org.rut.util.algorithm.support.ImprovedMergeSort; p.ks jD
import org.rut.util.algorithm.support.ImprovedQuickSort; j*6>{_[
import org.rut.util.algorithm.support.InsertSort; wni^qs.i@3
import org.rut.util.algorithm.support.MergeSort; +lhjz*0
import org.rut.util.algorithm.support.QuickSort; +~7x+6E
import org.rut.util.algorithm.support.SelectionSort; +I<^w)
import org.rut.util.algorithm.support.ShellSort; "Dt: 8Nf^
ns&3Dh(IVP
/** x@p1(V.
* @author treeroot qlNB\~HCe
* @since 2006-2-2 M(|6YF7u
* @version 1.0 d5YL=o
*/ W6A-/;S\
public class SortUtil { %7S{g
public final static int INSERT = 1; yADX^r(
public final static int BUBBLE = 2; N hY`_?)
public final static int SELECTION = 3; hWz/PK,
public final static int SHELL = 4; a !yBEpMo
public final static int QUICK = 5; hU~up a<dD
public final static int IMPROVED_QUICK = 6; ^&z3zFTp
public final static int MERGE = 7; d%~OEq1i"
public final static int IMPROVED_MERGE = 8; g9.y`o}c
public final static int HEAP = 9; W[G5+*i
e#<A\?
public static void sort(int[] data) { MwHxn%
sort(data, IMPROVED_QUICK); wqasI@vyu
} cD5N'3
private static String[] name={ ev[!:*6P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mb?r{WCi
}; ) >H11o{&
X 2Zp@q(
private static Sort[] impl=new Sort[]{ p6&6^v\
new InsertSort(), sLOkLz"x
new BubbleSort(), ?Z2_y-
new SelectionSort(), rUW/d3y
new ShellSort(), 0PdX>h.t
new QuickSort(), }? :T*CJ
new ImprovedQuickSort(), g@Z7f y7
new MergeSort(), T!2gOe
new ImprovedMergeSort(), 9$WA<1PK+
new HeapSort() fAT+x1J\
}; *JA0Vs5
?58*#'r
public static String toString(int algorithm){ iGw\A!}w\
return name[algorithm-1]; ,opS)C$
} rNl%I@G
]^6r7nfR6|
public static void sort(int[] data, int algorithm) { 68()2v4X
impl[algorithm-1].sort(data); G2s2i2&6E
} 6[3>[ej:x
eAK=ylF;
public static interface Sort { g?gF*^_0
public void sort(int[] data); C>*1f|<
} Blox~=cW
tL\L4>^7T
public static void swap(int[] data, int i, int j) { x4CSUcKb
int temp = data; vduh5.
data = data[j]; 9!,f4&G`
data[j] = temp; p1']+4r%
} X?z CB
} y(yBRR