[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; 8L,=Eap
} r\d(*q3B
int i1=l; >1(J
int i2=mid+1; Kv(R|d6Lp
for(int cur=l;cur<=r;cur++){ z)S6f79`Q
if(i1==mid+1) (-g*U#
data[cur]=temp[i2++]; <n4`#d
else if(i2>r) (c>g7d<>n
data[cur]=temp[i1++]; f-G)pHm
else if(temp[i1] data[cur]=temp[i1++]; fz\Q>u'T
else s(nT7x+W
data[cur]=temp[i2++]; ujRXAN@mC
} {G Jl<G1
} 4WJY+)
z7ik/>d?
} v!8=B21
a8f#q]TyQ
改进后的归并排序: |82q|@e
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package org.rut.util.algorithm.support; 54CJ6"q
R7/S SuG6\
import org.rut.util.algorithm.SortUtil; Wk<fNHg
g5|~i{"0
/** W48RZghmx
* @author treeroot ;NR|Hi]
* @since 2006-2-2 BYB4-,
* @version 1.0 V9,<>
*/ _6nAxm&x`%
public class ImprovedMergeSort implements SortUtil.Sort { T@tsM|pI
SvT0%2
private static final int THRESHOLD = 10; Jv8:GgSg
lN#j%0MaUo
/* J5G<Y*q
* (non-Javadoc) W;Y^(f
* pM?~AYWb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d ItfR'$
*/ $<v4c5r]O
public void sort(int[] data) { Hw o _;fV
int[] temp=new int[data.length]; az F!V
mergeSort(data,temp,0,data.length-1); 5c` ;~
} fAgeF$9@
)&@YRT\c?8
private void mergeSort(int[] data, int[] temp, int l, int r) { YGJ!!(~r
int i, j, k; kk /#&b2
int mid = (l + r) / 2; Z)s !p
if (l == r) !0W(f.A{K
return; )X0=z1$
if ((mid - l) >= THRESHOLD) S=_u3OH0
mergeSort(data, temp, l, mid); 5vyg-'
else SBreA-2
insertSort(data, l, mid - l + 1); J8emz8J
if ((r - mid) > THRESHOLD) +]eG=. u
mergeSort(data, temp, mid + 1, r); = LNU%0m
else a;xeHbE
insertSort(data, mid + 1, r - mid); I=kqkuW
Sb[>R(0:
for (i = l; i <= mid; i++) { ~#E&E%sJ
temp = data; x4I!f)8Q
} UjI./"]O
for (j = 1; j <= r - mid; j++) { p(n0(}eVC'
temp[r - j + 1] = data[j + mid]; EHwb?{
} .o/|]d`%
int a = temp[l]; 1m~|e.g_'`
int b = temp[r]; K,g6y#1"
for (i = l, j = r, k = l; k <= r; k++) { rWTaCU^qV
if (a < b) { |Q/LC0?
data[k] = temp[i++]; 2nyK'k
a = temp; a51(ySC}<s
} else { AwZ@)0Wy
data[k] = temp[j--]; 05 6K)E
b = temp[j]; A;;#]]48
} =FzmifTc
} D`p2aeI
} P8YnKyI,.
Xex7Lr&
/** !V.]mI
* @param data Q#%LIkeq
* @param l jr`T6!\
* @param i w5i*pOG)Z
*/ ?ES{t4"
private void insertSort(int[] data, int start, int len) { vFe=AY<Rt|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QT%`=b
} lf(+]k30
} f/sz/KC]~
} K}cZK
} cIO/8D#zU
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堆排序： ;j T{< Y
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package org.rut.util.algorithm.support; NN7KwVg
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import org.rut.util.algorithm.SortUtil; \;-Yz
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/** \l=A2i7TQ
* @author treeroot F[coa5
* @since 2006-2-2 4M"'B A<
* @version 1.0 D!* SA
*/ glch06
public class HeapSort implements SortUtil.Sort{ EZWWvL
Z%?>H iy'o
/* (non-Javadoc) ar@,SKU'K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #`@)lU+/
*/ htYfIy{5w
public void sort(int[] data) { %{ U (y#
MaxHeap h=new MaxHeap(); hzAuj0-A
h.init(data); F~v0CBcAL
for(int i=0;i h.remove(); t,Tq3zB
System.arraycopy(h.queue,1,data,0,data.length); AIP0PJI3
} C,ldi"|
VnN(lJ
private static class MaxHeap{ <e Y2}Ml
"X<V>q$0~c
void init(int[] data){ 7IUJHc[R?
this.queue=new int[data.length+1]; "S@]yL
for(int i=0;i queue[++size]=data; Zq{gp1WC
fixUp(size); ^Cp;#|g,
} ([m4dr
} 6oWFjeZ0
]@_|A, ]
private int size=0; Z2;~{$&M+
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private int[] queue; UJS vtD{g
k'v+/6 Y
public int get() { -R9{Ak
return queue[1]; pl}W|kW}
} fda2dY;
Nt tu)wr
public void remove() { #-L<
SortUtil.swap(queue,1,size--); O>*Vo!z\f
fixDown(1); 7iy2V;}
} G_WFg$7G%
file://fixdown .Z`xNp
private void fixDown(int k) { KsTE)@F:
int j; ra ,.vJuT
while ((j = k << 1) <= size) { RP^L.X(7^
if (j < size %26amp;%26amp; queue[j] j++; <UIE-#
if (queue[k]>queue[j]) file://不用交换 D=f$-rn
break; Z@ec}`UO|u
SortUtil.swap(queue,j,k); A(XX2f!i
k = j; {iQ4jJ`n
} #T>pu/EQX_
} Bi/E{k,
private void fixUp(int k) { Ea[SS@'R
while (k > 1) { y2B'0l
int j = k >> 1; G[d]t$f=
if (queue[j]>queue[k]) u3cl7~- yW
break; qus%?B{b}
SortUtil.swap(queue,j,k); '^Q$:P{G?
k = j; 7 /"Z/^
} f]Zj"Tt-
} X=jD^"-
1#zD7b~
} Z0 c|;
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} MHCwjo"
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SortUtil： R2Q1Rk#
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package org.rut.util.algorithm; {(d 6of`C_
Lu71Qdu09
import org.rut.util.algorithm.support.BubbleSort; gP ^A
import org.rut.util.algorithm.support.HeapSort; GG4FS
import org.rut.util.algorithm.support.ImprovedMergeSort; bz`rSp8h
import org.rut.util.algorithm.support.ImprovedQuickSort; KO))2GET
import org.rut.util.algorithm.support.InsertSort; 0\1g-kc!v
import org.rut.util.algorithm.support.MergeSort; d(vt0
import org.rut.util.algorithm.support.QuickSort; XCGK&OGI
import org.rut.util.algorithm.support.SelectionSort; y+',jM
import org.rut.util.algorithm.support.ShellSort; 8%Ak
7Xh ;dJAF3
/** u&j_;Y!6
* @author treeroot _!yUr5&,Br
* @since 2006-2-2 AI$\wp#aw
* @version 1.0 wk2Ff*&
*/ !#4b#l(e6
public class SortUtil { Om8Sgy?
public final static int INSERT = 1; }?6gj%$c
public final static int BUBBLE = 2; WXa<(\S\V
public final static int SELECTION = 3; Q*9Y.W.8
public final static int SHELL = 4; o#-^Lg&
public final static int QUICK = 5; LO,:k+&A+
public final static int IMPROVED_QUICK = 6; dp }zG+
public final static int MERGE = 7; ;(Z9.
public final static int IMPROVED_MERGE = 8; T9YrB
public final static int HEAP = 9; {afIr1j/m
dlDO?T
public static void sort(int[] data) { ^5R2~
sort(data, IMPROVED_QUICK); :>3?|Z"Aj
} *3(mNpi{_
private static String[] name={ WFfn:WSWU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wd2z=^S~
}; .6pVt_f0/
50Ov>(f@7
private static Sort[] impl=new Sort[]{ K#x|/b'5d
new InsertSort(), 2zkOs:
new BubbleSort(), =<r1sqf
new SelectionSort(), l-8rCaq&J
new ShellSort(), To,*H OP
new QuickSort(), Lr*\LP6jx3
new ImprovedQuickSort(), =DXN`]uN
new MergeSort(), Eo0/cln|
new ImprovedMergeSort(), eI/5foA
new HeapSort() d_Z?i#r0l
}; }(9ZME<(
(J.k\d
public static String toString(int algorithm){ YLb$/6gj6
return name[algorithm-1]; U<6+2y P
} Bk/&H-NI
5p~hUP]tT
public static void sort(int[] data, int algorithm) { 2k^'}7G%
impl[algorithm-1].sort(data); !d1a9los
} r"`7ezun:
JD]uDuE
public static interface Sort { yKC1h`2
public void sort(int[] data); h*\u0yD)
} >LW}N!IBy
L fZF
public static void swap(int[] data, int i, int j) { D=}\]Krmay
int temp = data; 4-oaq'//BT
data = data[j]; v4,Dt
data[j] = temp; -]Q\G
} 8"o@$;C
} m{r#o?