[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; r1;e 0\?`
} LQqfi ~
int i1=l; (UGol[f<
int i2=mid+1; 1[s0Lz
for(int cur=l;cur<=r;cur++){ 84^[/d;!
if(i1==mid+1) p,;mYms
data[cur]=temp[i2++]; /&(1JqzlB
else if(i2>r) f`?0WJ(M
data[cur]=temp[i1++]; hg8Be6G<
else if(temp[i1] data[cur]=temp[i1++]; csDQva\
else 4-V)_U#8
data[cur]=temp[i2++]; UOt8Q0)}
} ?mU\ N0o
} @1g&Z}L o
W Y:s gG
} @1bH}QS
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改进后的归并排序: ^C7C$TZS
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package org.rut.util.algorithm.support; +/y]h0aa
.$0Pr%0pWI
import org.rut.util.algorithm.SortUtil; $;`I,k$0>~
=EpJZt
/** :u/mTZDi
* @author treeroot +s~.A_7)
* @since 2006-2-2 ^A!$i$NON
* @version 1.0 pj; I)-d/
*/ NXI[q'y
public class ImprovedMergeSort implements SortUtil.Sort { k>5O`Y:
"SR5wr
private static final int THRESHOLD = 10; YeyGN
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/* ]?&FOzN5$P
* (non-Javadoc) 6Dst;:
* RJ}#)cT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h1f8ktF
*/ Qn|+eLY
public void sort(int[] data) { 5I' d PNf
int[] temp=new int[data.length]; ,@.EpbB
mergeSort(data,temp,0,data.length-1); EB,4PEe:
} af'@h:
l r~gG3
private void mergeSort(int[] data, int[] temp, int l, int r) { <kbyZXV@K
int i, j, k; :E'P7A
int mid = (l + r) / 2; Yb:pAzw6
if (l == r) K)N0,Qwu
return; _~M^ uW^l
if ((mid - l) >= THRESHOLD) T)SbHp Y
mergeSort(data, temp, l, mid); A5nO=
else > 0.W`j(s
insertSort(data, l, mid - l + 1); WG5W0T_
if ((r - mid) > THRESHOLD) v}[dnG
mergeSort(data, temp, mid + 1, r); W^3;F1
else 98=la,^$
insertSort(data, mid + 1, r - mid); v(O=IUa
>EP(~G3u
for (i = l; i <= mid; i++) { GwLFL.Ke
temp = data; p]ivf
} 4c159wsnQ
for (j = 1; j <= r - mid; j++) { Xy7Z38G
temp[r - j + 1] = data[j + mid]; C@gXT]Q 0}
} ,t,wy37*D
int a = temp[l]; 2UadV_s+s
int b = temp[r]; Zyye%Ly
for (i = l, j = r, k = l; k <= r; k++) { e@n!x}t8
if (a < b) { MGt]'}
data[k] = temp[i++]; Vrp[r *V@E
a = temp; CxF-Z7 '
} else { xf,5R9g/
data[k] = temp[j--]; g/Wh,f3
b = temp[j]; R_kQPP
} thW<
} :&w{\-0{
} WsOi,oG@
sl|_=oXT
/** }Je>;{&%
* @param data #A<P6zJXR
* @param l pq!%?m]
* @param i B'weok
*/ z@VP:au
private void insertSort(int[] data, int start, int len) { (@sp/:`6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hs(D/&6%
} Y+-xvx :
} "!UVs+)]
} -1r2K
} =A!S/;z>
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堆排序： :Vuf6,
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package org.rut.util.algorithm.support; 7;}l\VXHm
kQv*eZ~
import org.rut.util.algorithm.SortUtil; ;LwqTlJ*[L
xUWr}j4;
/** , c;eN
* @author treeroot t+TYb#Tc
* @since 2006-2-2 v"Jgw;3
* @version 1.0 0b|zk <
*/ "ZMkL)'7-
public class HeapSort implements SortUtil.Sort{ f4('gl9
%_M2N.n
/* (non-Javadoc) k(s;,B\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'r}fZ
*/ +M\8>/0oA
public void sort(int[] data) { !~iGu\y
MaxHeap h=new MaxHeap(); 2k -+^}r
h.init(data); E^Gg '1
for(int i=0;i h.remove(); (9RslvKL
System.arraycopy(h.queue,1,data,0,data.length); cma*Dc
} mY&ud>,U:
M8;lLcgu.
private static class MaxHeap{ xFFr
sd0r'jb
void init(int[] data){ @xWdO,#
this.queue=new int[data.length+1]; )R)a@op
for(int i=0;i queue[++size]=data; JBX[bx52<r
fixUp(size); m7|RD]q&
} B|{I:[
} &xSa7FY
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private int size=0; !.X.tc
i%{X9!*%TX
private int[] queue; \FzM4-
G*8GGWB^a
public int get() { 3smM,fi
return queue[1]; /!xF?OmVd
} 7^e +
8HErE<_(
public void remove() { $17 su')
SortUtil.swap(queue,1,size--); LLAa1Wq
fixDown(1); $p* p
} oR#:NtX@
file://fixdown e 9$C#D>D
private void fixDown(int k) { %}Q&1P=
int j; v> z@
while ((j = k << 1) <= size) { Sr.;GS5i
if (j < size %26amp;%26amp; queue[j] j++; C;B}3g&
if (queue[k]>queue[j]) file://不用交换 `k{& /]
break; 34AP(3w
SortUtil.swap(queue,j,k); 2&(sa0*y
k = j; |$lwkC)O
} N=1JhjVk"
} 90N`CXas
private void fixUp(int k) { A2H4k|8
while (k > 1) { -p,x&h,p
int j = k >> 1; }-<zWI{p
if (queue[j]>queue[k]) u' Qd,
break; }ynT2a#LU'
SortUtil.swap(queue,j,k); ug&[ IL~lc
k = j; j5 wRGn3
} ;e8V +h
} =([av7
MQ/ A]EeL
} 76fIC
t2{~bzq1X
} k!XhFWb
]rBM5~
SortUtil： Z0,~V
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package org.rut.util.algorithm; kMxazx1
tJI,r_
import org.rut.util.algorithm.support.BubbleSort; w5C*L)l
import org.rut.util.algorithm.support.HeapSort; +{`yeZ9S
import org.rut.util.algorithm.support.ImprovedMergeSort; 7Hw<ojkt
import org.rut.util.algorithm.support.ImprovedQuickSort; E">T*ao
import org.rut.util.algorithm.support.InsertSort; ZFh+x@
import org.rut.util.algorithm.support.MergeSort; D@YP7
import org.rut.util.algorithm.support.QuickSort; p#8W#t$
import org.rut.util.algorithm.support.SelectionSort; {==pZpyyh
import org.rut.util.algorithm.support.ShellSort; q`|CrOzO
< a rZbM
/** &x:JD1T}
* @author treeroot ztM<J+
* @since 2006-2-2 l0]d
* @version 1.0 ;."<m
*/ f>Td)s1 M
public class SortUtil { uYO|5a<f~
public final static int INSERT = 1; rjA@U<o
public final static int BUBBLE = 2; 0Ce]V,i6C>
public final static int SELECTION = 3; ik1tidw
public final static int SHELL = 4; n(Y%Vmy
public final static int QUICK = 5; rx~[Zs+*
public final static int IMPROVED_QUICK = 6; 2-If]Fc
public final static int MERGE = 7; ]hw-Bu\{
public final static int IMPROVED_MERGE = 8; }E<^gAh}
public final static int HEAP = 9; LwJ0
ENh8kD l5
public static void sort(int[] data) { i^Ut015q%
sort(data, IMPROVED_QUICK); tl8O6`<Z
} +RZ~LA\+
private static String[] name={ =ZYThfAEw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N"5fmY<
}; B~WtZ-%%E
Dma.r
private static Sort[] impl=new Sort[]{ `\$8`Zb;
new InsertSort(), H3/caN:
new BubbleSort(), 1cN')"
new SelectionSort(), VAQ)Hc]
new ShellSort(), h=VqxGC&
new QuickSort(), dXvt6kF
new ImprovedQuickSort(), 4)-)#`K
new MergeSort(), nY-* i!H
new ImprovedMergeSort(), JyBp-ii
new HeapSort() _cqy`p@"
}; }6zbT-i
%FkLQ+v/<
public static String toString(int algorithm){ b}z`BRCc
return name[algorithm-1]; 6Y*;{\Rd
} 70W"G X&
]TpU"JD
public static void sort(int[] data, int algorithm) { f|3q^wjs
impl[algorithm-1].sort(data); GRYe<K
} #XIc "L)c
vn').\,P2O
public static interface Sort { @M;(K<%h
public void sort(int[] data); [uuj?Rbd
} s'I)A^i+
.QWhK|(.!
public static void swap(int[] data, int i, int j) { =jAFgwP\
int temp = data; lP<I|O=z
data = data[j]; OYwGz
data[j] = temp; /="HqBI#i
} (RL>Hn;.
} cSD{$B: