[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; AuCVpDH
} s0h)~z
int i1=l; $200?[
int i2=mid+1; !`WuLhB`
for(int cur=l;cur<=r;cur++){ g?`J,*y
if(i1==mid+1) O//e0?]W
data[cur]=temp[i2++]; Psv!`K
else if(i2>r) | jkmh6
data[cur]=temp[i1++]; Il642#Gh
else if(temp[i1] data[cur]=temp[i1++]; ,)RdXgCs
else t Z%?vY~!
data[cur]=temp[i2++]; nGt8u4gcP
} j{PX ~/
} o?3R HP47
wfdFGoy(
} 8+u8piG
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改进后的归并排序: s5pY)6)
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package org.rut.util.algorithm.support; yV8).4
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import org.rut.util.algorithm.SortUtil; sHF vzE%
7I|%GA_
/** X_qXH5^%
* @author treeroot =6sXZ"_Tw
* @since 2006-2-2 %Z7!9+<
* @version 1.0 E;qwoTmul
*/ o;[oy#aWl_
public class ImprovedMergeSort implements SortUtil.Sort { WdT|xf.Q&
(Ka#6
private static final int THRESHOLD = 10; |(SW
+6=!ve}
/* BUb(BzC
* (non-Javadoc) <-F"&LI{<
* .*j+?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QP#Wfk(C
*/ $c}0L0
public void sort(int[] data) { asg>TOW
int[] temp=new int[data.length]; k@L~h{`Mc\
mergeSort(data,temp,0,data.length-1); =r~.I
} yShHFlO=
.N=hA
private void mergeSort(int[] data, int[] temp, int l, int r) { mw[4<vfB0a
int i, j, k; qx)k1QY
int mid = (l + r) / 2; ZhsZywM
if (l == r) O[!o1.
return; !)O$Q}'\
if ((mid - l) >= THRESHOLD) MbfzGYA2~
mergeSort(data, temp, l, mid); Aq!['G
else mB{{o}'<u
insertSort(data, l, mid - l + 1); PAHlj,n)
if ((r - mid) > THRESHOLD) tWnm{mF
mergeSort(data, temp, mid + 1, r); R(sM(x5a`
else @@wx~|%
insertSort(data, mid + 1, r - mid); `VtwKt*
(GG"'bYk
for (i = l; i <= mid; i++) { l,.?-|Poa
temp = data; :eW~nI.Vc
} PQ}%}S7:
for (j = 1; j <= r - mid; j++) { 1v&Fo2ML
temp[r - j + 1] = data[j + mid]; |Vi&f5p,@
} d|]O<]CG_
int a = temp[l]; +5[oY,^cO
int b = temp[r]; /y)"j#-eW
for (i = l, j = r, k = l; k <= r; k++) { Eap/7U1Q
if (a < b) { m>ycN
data[k] = temp[i++]; "<x~{BN?
a = temp; Jwd&[ O
} else { -l H>8+
data[k] = temp[j--]; iIaT1i4t.
b = temp[j]; ti^v%+r1
} *ldMr{s<R
} 8e!DDh
} V<4+g/
y?n2`l7f
/** ]"Y%M'
* @param data _i[)$EgFm
* @param l Wi[m`#
* @param i *xg`Kwl5Kl
*/ }b+QYSt
private void insertSort(int[] data, int start, int len) { 6@q[tN7_^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .3<IOtD=
} oNB,.:
} P%sO(_PuT
} !?o$-+a|
} g'ZMV6b?K
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堆排序： 6_<s=nTX
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package org.rut.util.algorithm.support; 030U7VT1
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import org.rut.util.algorithm.SortUtil; 5 n+ e
4su_;+]
/** *Z`XG_s5
* @author treeroot $54=gRo^
* @since 2006-2-2 .S!>9X,
* @version 1.0 ;DD>k bd
*/ 6W;?8Z_1
public class HeapSort implements SortUtil.Sort{ /Y[o=Uyl
ZSPgci
/* (non-Javadoc) !ml_S)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X#DL/#z k
*/ sr+gD*@h
public void sort(int[] data) { tyuk{*Me:
MaxHeap h=new MaxHeap(); YxEbg(Y
h.init(data); V+O0k: o
for(int i=0;i h.remove(); H+VO.s.a
System.arraycopy(h.queue,1,data,0,data.length); 6!+X.+
} (@ fa~?v>@
y98JiNq
private static class MaxHeap{ m\/,cc@,
{b'}:aMc
void init(int[] data){ *O+R|Cdp/
this.queue=new int[data.length+1]; ;h9-}F
for(int i=0;i queue[++size]=data; T2DF'f3A
fixUp(size); JFRpsv
} mPs%ZC
} '7Mep ]
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private int size=0; n .f4z<
-,QKTxwo>
private int[] queue; ]6{(Hjt
HKTeqH_:
public int get() { VY/|WD~"CW
return queue[1]; =Kc|C~g
} |*^8~u3J"
@up&q
public void remove() { ;w`sz.
SortUtil.swap(queue,1,size--); I %|@3=Yc
fixDown(1); h@*lWi2K7
} +"cRhVR
file://fixdown i`[#W(m
private void fixDown(int k) { l`@0zw+
int j; .E+OmJwD
while ((j = k << 1) <= size) { [ rQMD^:M$
if (j < size %26amp;%26amp; queue[j] j++; 1.'(nKoq
if (queue[k]>queue[j]) file://不用交换 F:M>z=
break; 2E$^_YT C
SortUtil.swap(queue,j,k); /8xH$n&xoC
k = j; 9wL!D3e {Q
} tT;8r8@
} X<(6T
private void fixUp(int k) { !|:RcH[
while (k > 1) { ~?#~Ar
int j = k >> 1; f:]u`ziM
if (queue[j]>queue[k]) i<%m Iq1L
break; A-Mj|V
SortUtil.swap(queue,j,k); -Q6(+(7_|
k = j; ,09DBxQq,
} l+%Fl=Q2em
} }N?g|
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} R.K?
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} Qh*)pt]n
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SortUtil： |2O')3p"9
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package org.rut.util.algorithm; )1WMlG
wfE^Sb3
import org.rut.util.algorithm.support.BubbleSort; iQqqs`K
import org.rut.util.algorithm.support.HeapSort; z<!O!wX_aI
import org.rut.util.algorithm.support.ImprovedMergeSort; Tr~sieL
import org.rut.util.algorithm.support.ImprovedQuickSort; xA92C
import org.rut.util.algorithm.support.InsertSort; 6 Ew@L<v
import org.rut.util.algorithm.support.MergeSort; zX98c
import org.rut.util.algorithm.support.QuickSort; 1I ""X]I_
import org.rut.util.algorithm.support.SelectionSort; ]% K' fXj$
import org.rut.util.algorithm.support.ShellSort; _BbvhWN&+
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/** SAR= {/
* @author treeroot K*1.'9/
* @since 2006-2-2 /,!<Va;~
* @version 1.0 V@[rf<,
*/ z`4c 4h]I
public class SortUtil { AotCX7T2T
public final static int INSERT = 1; YScvyh?E
public final static int BUBBLE = 2; 8] `Ru5nd
public final static int SELECTION = 3; :|rPT)yT]
public final static int SHELL = 4; M%I@<~wl
public final static int QUICK = 5; +"dv7
public final static int IMPROVED_QUICK = 6; \|.7-X
public final static int MERGE = 7; J? .F\`N)
public final static int IMPROVED_MERGE = 8; cLG6(<L
public final static int HEAP = 9; `<U5z$^QTw
V^TbP.
public static void sort(int[] data) { zyFUl%
sort(data, IMPROVED_QUICK); $5NKFJc
} 1Ipfw
private static String[] name={ I`T1Pll
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wksl0:BL
}; 5wv fF.v
rQb7?O@-
private static Sort[] impl=new Sort[]{ nls
new InsertSort(), 1_hW#I\'
new BubbleSort(), $=)gpPT
new SelectionSort(), VL\t>n
new ShellSort(), 1& ^?U{
new QuickSort(), rzUlO5?R=
new ImprovedQuickSort(), T.ML$"f
new MergeSort(), g9~]s9
new ImprovedMergeSort(), UE.4qY_7
new HeapSort() ]JXKZV8$0
}; `XKVr
3I $>uR
public static String toString(int algorithm){ H C0w;MG)
return name[algorithm-1]; oyvKag
} Mxl]"?z
LT VF8-v
public static void sort(int[] data, int algorithm) { mbxbEqz
impl[algorithm-1].sort(data); />44]A<
} *F`A S>
t9cl"F=
public static interface Sort { Qdf=XG5
public void sort(int[] data); -7{$Vj
} ,xfO;yd
gckI.[!b
public static void swap(int[] data, int i, int j) { 2%u;$pj
int temp = data; 4 %W:
data = data[j]; &(N+.T5cp
data[j] = temp; ~j9O$s~)
} ep/Y^&$M
} ?OlV"zK