[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; O]=C#E{
} ?C;JJ#Ho
int i1=l; r'aY2n^O
int i2=mid+1; w+UV"\!G)Q
for(int cur=l;cur<=r;cur++){ IsYP0(L
if(i1==mid+1) 3B9nP._
data[cur]=temp[i2++]; YB!!/ SX4
else if(i2>r) E&2tBrAq
data[cur]=temp[i1++]; 3]}'TA`v
else if(temp[i1] data[cur]=temp[i1++]; L7q |^`
else }5gr5g\OtP
data[cur]=temp[i2++]; v[#)GB _5
} cdp0!W4Gi
} T0|H9>M
,seFkG@1
} P#tvm,
tHI*,
改进后的归并排序: "DckwtG:%
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package org.rut.util.algorithm.support; %?tq;~|]Q
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import org.rut.util.algorithm.SortUtil; TbNGgjT
[&VxaJ("3
/** lizTRVBE
* @author treeroot Fj=NiZ=
* @since 2006-2-2 0'yyfz
* @version 1.0 DX@}!6|T
*/ FBYODw
public class ImprovedMergeSort implements SortUtil.Sort { km>o7V&4G
Q=+8/b
private static final int THRESHOLD = 10; nR'#s%Kj
hZuYdV{'h
/* -V=arm\#z
* (non-Javadoc) <5ZJ]W
* c4|so=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :XS"#^aJ
*/ Dd/}Ya(Gi
public void sort(int[] data) { \Hum}0[
int[] temp=new int[data.length]; rSyaZ6#
mergeSort(data,temp,0,data.length-1); 0j@IxEPs
} lgT?{,>RkW
=lrN'$z?%
private void mergeSort(int[] data, int[] temp, int l, int r) { 8XbR
int i, j, k; 2LhE]O(_"
int mid = (l + r) / 2; 878tI3-
if (l == r) E~He~wHWe
return; {wu!6\:<??
if ((mid - l) >= THRESHOLD) 37>MJ
mergeSort(data, temp, l, mid); H1Xovr
else wo(j}O-
insertSort(data, l, mid - l + 1); +89o`u_l%
if ((r - mid) > THRESHOLD) N1? iiv
mergeSort(data, temp, mid + 1, r); C4_t_N
else bj.]o*u-
insertSort(data, mid + 1, r - mid); \{>eOD_
V_]-`?S
for (i = l; i <= mid; i++) { oNSz&)LP
temp = data; 2u&c &G
} tc/jY]'32
for (j = 1; j <= r - mid; j++) { dofR)"<p,^
temp[r - j + 1] = data[j + mid]; Mf7E72{D
} l$`G:%qHj
int a = temp[l]; :yD@5)
int b = temp[r]; c~oe,9
for (i = l, j = r, k = l; k <= r; k++) { I"V3+2e
if (a < b) { Wf1-"Q
data[k] = temp[i++]; -s~p}CQ.
a = temp; '%Dg{ zL
} else { ZOHRUm
data[k] = temp[j--]; ^'Zh;WjI7
b = temp[j]; SRk7gfP*q
} YPQCOG
} mt.,4
} 4`0;^K.
:eLLDp<
/** *lq7t2
* @param data },3R%?89%
* @param l D4\(:kF\Hg
* @param i ]Hj`2\KD.d
*/ nK:`e9ES
private void insertSort(int[] data, int start, int len) { |ZuDX87
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \]GGVI;u
} "b;k.Fx
} bgXc_>T6_y
} 2^ kn5
} s.ey!ew
^ N_`^m
堆排序： [r~~=b7*[
RA~_]Hk
package org.rut.util.algorithm.support; c=<v.J@K
s @3zx
import org.rut.util.algorithm.SortUtil; Nuo<` 6mV@
Es,0'\m&
/** 7x:F!0:
* @author treeroot w`38DF@K
* @since 2006-2-2 a!{hC)d*
* @version 1.0 zN/Gy}
*/ Xa6qvg7/
public class HeapSort implements SortUtil.Sort{ t9n'!
w5=EtKTi
/* (non-Javadoc) *Ag,kW"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A8`orMo2
*/ Jz2q\42q
public void sort(int[] data) { vKV{ $|
MaxHeap h=new MaxHeap(); (BhL/A 4
h.init(data); Ut=0~x.=<
for(int i=0;i h.remove(); 5[hlg(eb
System.arraycopy(h.queue,1,data,0,data.length); )S"o{N3B
} dR?5$V(
s={X-H< 2
private static class MaxHeap{ .;}pU!S~R
fY2l.H\f
void init(int[] data){ ;W =by2x*
this.queue=new int[data.length+1]; 3pzOt&T|w
for(int i=0;i queue[++size]=data; r6/<&1[
fixUp(size); s UvKA0
} ,7/\&X<`B
} 4v i B=>
;+!xZOmm
private int size=0; ]dQZ8yVK
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private int[] queue; <`b|L9
f61]`@Bk
public int get() { l$qmn$Uc
return queue[1]; X]>[Qz)K^
} K T"h74@
<4SF~i
public void remove() { eq7C]i rH
SortUtil.swap(queue,1,size--); W>UjUq);
fixDown(1); ">0 /8]l
} jR}*bIzv
file://fixdown _qdWQFuM
private void fixDown(int k) { ^O?l9(=/u
int j; yzODF>KJ
while ((j = k << 1) <= size) { : ,|=Q}
if (j < size %26amp;%26amp; queue[j] j++; (u$!\fE-et
if (queue[k]>queue[j]) file://不用交换 ([E#zrz%
break; 4_Tb)?L+:
SortUtil.swap(queue,j,k); !G@V<'F
k = j; p` ^:Q*C"
} 4{uJ||!
} vjY);aQ
private void fixUp(int k) { }qTv&Z3$
while (k > 1) { k$Nx6?8E
int j = k >> 1; h/w]
if (queue[j]>queue[k]) sT@u3^>
break; (gv=P>:
SortUtil.swap(queue,j,k); i]V F'tG
k = j; * N2#{eF&]
} * ,|)~$=>
} QLxXp
N2M?5fF
} q oKQEG2
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} V/+H_=|
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SortUtil： 1KNkl,E
9G=A)j
package org.rut.util.algorithm; <5C=i:6%
9}IVNZc
import org.rut.util.algorithm.support.BubbleSort; fLf#2EA
import org.rut.util.algorithm.support.HeapSort; jauc*347
import org.rut.util.algorithm.support.ImprovedMergeSort; &^"s=g.
import org.rut.util.algorithm.support.ImprovedQuickSort; +A;n*DF2
import org.rut.util.algorithm.support.InsertSort; ) >-D={
import org.rut.util.algorithm.support.MergeSort; K]lb8q}Z~
import org.rut.util.algorithm.support.QuickSort; _&6juBb
import org.rut.util.algorithm.support.SelectionSort; ~`a#h#
import org.rut.util.algorithm.support.ShellSort; <[*h_gE5
;5zjd,
/** pO@k@JZ
* @author treeroot $NH`Iu9t
* @since 2006-2-2 0YgFjd 5
* @version 1.0 G*kXWEx
*/ je$R\7B<
public class SortUtil { H"kc^G+(R"
public final static int INSERT = 1; O#<|[Dzw
public final static int BUBBLE = 2; _oYA;O
public final static int SELECTION = 3; bUEt0wRR
public final static int SHELL = 4; w%!k?t,*]
public final static int QUICK = 5; .je~qo)
public final static int IMPROVED_QUICK = 6; 5+#?7J1
public final static int MERGE = 7; 10a=YG
public final static int IMPROVED_MERGE = 8; "1=.5:yG
public final static int HEAP = 9; D~t"9Z\
E#WjoIk
public static void sort(int[] data) { }-k_?2"A
sort(data, IMPROVED_QUICK); 98<bF{#0WM
} h[M6.
private static String[] name={ AOq9v~)z-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3:z4M9f
}; ZKiL-^dob
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private static Sort[] impl=new Sort[]{ "m<eHz]D
new InsertSort(), FN8=YUYK%
new BubbleSort(), o>QFdx
new SelectionSort(), PAO[Og,-
new ShellSort(), H@OrX
new QuickSort(), 8=u+BDG
new ImprovedQuickSort(), Oa3=+_C~$1
new MergeSort(), I*`=[nR
new ImprovedMergeSort(), a`GN@ 8
new HeapSort() E:LQ!
}; _tWfb}6;Zb
)SlUQ7f>
public static String toString(int algorithm){ 8/kx3
return name[algorithm-1]; HT1dvC$COo
} LmT[N@>"
l%Fse&4\
public static void sort(int[] data, int algorithm) { D+@/x{wX2
impl[algorithm-1].sort(data); 7o 83|s.Bm
} W6!4Qyn
U- UV<}
public static interface Sort { , L AJ
public void sort(int[] data); &d &oP
} {O3oUE+
yScov)dp(
public static void swap(int[] data, int i, int j) { .,BD DPFB
int temp = data; $ M[}(m
data = data[j]; iMY0xf8l
data[j] = temp; u" NIG
} )b:~kuHi
} +X|m>9