[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; Yi)s=Q:
} ||.Hv[ ]V*
int i1=l; Iqn (NOq^[
int i2=mid+1; 7!h> < sx
for(int cur=l;cur<=r;cur++){ TIt\
if(i1==mid+1) HTz`$9
data[cur]=temp[i2++]; ,,+4d :8$
else if(i2>r) (CgvI*O
data[cur]=temp[i1++]; RgW#z-PZF
else if(temp[i1] data[cur]=temp[i1++]; 8ZqLGa]
else 3Zl:rYD?
data[cur]=temp[i2++]; I8`$a
} n\V7^N
} /nuz_y\J
,hT.Ok={36
} k`A39ln7wu
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改进后的归并排序: f8aY6o"i
f$n5$hJlQ
package org.rut.util.algorithm.support; Pqw<nyC.
^6R(K'E}
import org.rut.util.algorithm.SortUtil; Ir5|H|b<
Jj\lF*B
/** awvP;F?q|
* @author treeroot @6UZC-M0
* @since 2006-2-2 \v5;t9uBZ
* @version 1.0 c#"t.j<E}
*/ ^]'_Qbi]}
public class ImprovedMergeSort implements SortUtil.Sort { NdSuOkwwt
X{Hh^H
private static final int THRESHOLD = 10; XZM@Rys
;gSRpTS:
/* y1T(R#
* (non-Javadoc) 5ya^k{`+ZO
* vp.?$(L^@/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ah_>:x
*/ 5%e+@X;j
public void sort(int[] data) { -W<1BJE
int[] temp=new int[data.length]; Gyy4zK
mergeSort(data,temp,0,data.length-1); EwU)(UK
} g}W|q"l?i
j7Ts&;`[*
private void mergeSort(int[] data, int[] temp, int l, int r) { rUmP_
int i, j, k; FMI1[|:;
int mid = (l + r) / 2; \!BVf@>p%
if (l == r) ..+#~3es#y
return; Rz|@BxB>n
if ((mid - l) >= THRESHOLD) gGUKB2)
mergeSort(data, temp, l, mid); u:2Ll[ eo
else ~6@`;s`[Y
insertSort(data, l, mid - l + 1); |*UB/8C^/!
if ((r - mid) > THRESHOLD) u4w!SD
mergeSort(data, temp, mid + 1, r); z\A ),;
else mfaU_Vo&
insertSort(data, mid + 1, r - mid); uf9&o#
QDV+(
for (i = l; i <= mid; i++) { {?IbbT
temp = data; F.5fasdX'
} h]k$K
for (j = 1; j <= r - mid; j++) { h_S>Q
temp[r - j + 1] = data[j + mid]; L YF|
} P/|1,Sk
int a = temp[l]; c$71~|-[
int b = temp[r]; K)~aH
for (i = l, j = r, k = l; k <= r; k++) { 5TB6QLPEwY
if (a < b) { 0kOwA%m
data[k] = temp[i++]; ow{.iv\,u
a = temp; -X~|jF
} else { u;-fG9xs
data[k] = temp[j--]; xlu4
b = temp[j]; n+hL/aQ+
} \|HNFxT`
} .6azUD4
} <?5|(Q"@:
_W_< bI34
/** SeDk/}/~e
* @param data ;%^=V#
* @param l ->{-yh]jv
* @param i O.ce=E
*/ vQK/xg
private void insertSort(int[] data, int start, int len) { bIyg7X)/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \rzMgR$/rj
} uHSnZ"#
} qx[c0X!
} 6X%g-aTs
} =(D"(OsQ/
h )5S4)
堆排序： @;P ;iI
YnU)f@b#
package org.rut.util.algorithm.support; T!KwRxJ23
HdI)Z<Krp
import org.rut.util.algorithm.SortUtil; 9%iQ~
N\ !
/** /}m*|cG/
* @author treeroot _7<{+Zzm
* @since 2006-2-2 jxkjPf?
* @version 1.0 s{yw1:
*/ o5?Y
public class HeapSort implements SortUtil.Sort{ [%N?D#;
&tAYF_}
/* (non-Javadoc) -R:_o1"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cS9jGD92
*/ ;ISnI
public void sort(int[] data) { T TN!$?G3
MaxHeap h=new MaxHeap(); 9"]#.A^Q*
h.init(data); ucx02^uA
for(int i=0;i h.remove(); }}QR'
System.arraycopy(h.queue,1,data,0,data.length); 3>@VPMi
} l9&k!kF`
*??lwvJp
private static class MaxHeap{ */n8T]s
([dd)QU
void init(int[] data){ V)>?[
this.queue=new int[data.length+1]; X&?s:A
for(int i=0;i queue[++size]=data; n%7?G=_kj
fixUp(size); lnyfAq}w
} Y-a
} LsuOmB|^
(jDz[b#OPz
private int size=0; }r5yAE
MkPQ@so
private int[] queue; KddCR&
PVBz~rG
public int get() { ~E7IU<B
return queue[1]; =,#--1R7g
} d/&> `[i
I1U2wD
public void remove() { \}?X5X>
SortUtil.swap(queue,1,size--); $0E+8xE
fixDown(1); }Pg}"fb^
} m"iA#3l*=
file://fixdown :]@c%~~!&
private void fixDown(int k) { F^NK"<tW
int j; <]M.K3>
while ((j = k << 1) <= size) { Wjw,LwB
if (j < size %26amp;%26amp; queue[j] j++; aIV / c
if (queue[k]>queue[j]) file://不用交换 - |g"q|
break; '%QCNO/
SortUtil.swap(queue,j,k); vyIH<@@p7
k = j; E>|X'I?r^
} *(F`NJ 3
} WYUDD_m
private void fixUp(int k) { mOsp~|d
while (k > 1) { =Nxkr0])!
int j = k >> 1; WQ.0}n}d
if (queue[j]>queue[k]) 1*TbgxS~W
break; WK>|IgK
SortUtil.swap(queue,j,k); ^Fco'nlM
k = j; 0- )K_JV
} Gs,:$Im
} -V|"T+U
%'=*utOxy
} zXn-E
o3fc-
} "s(~k
:pqUUZ6x&
SortUtil： ,KW Q 6
9qB0F_xl
package org.rut.util.algorithm; q*l4h u%3
S%i^`_=Q
import org.rut.util.algorithm.support.BubbleSort; ZNX38<3h
import org.rut.util.algorithm.support.HeapSort; l4oyF|oJTH
import org.rut.util.algorithm.support.ImprovedMergeSort; Icnhet4
import org.rut.util.algorithm.support.ImprovedQuickSort; l}))vf=i
import org.rut.util.algorithm.support.InsertSort; 27e!KG[&
import org.rut.util.algorithm.support.MergeSort; YB5"i9T2
import org.rut.util.algorithm.support.QuickSort; g"evnp
import org.rut.util.algorithm.support.SelectionSort; -)`_w^Ox
import org.rut.util.algorithm.support.ShellSort; 5QMra5Nk
%L+q:naZe
/** L=4+rshl!_
* @author treeroot !mmMAsd,
* @since 2006-2-2 }'$PYAf6
* @version 1.0 KhHFJo[8sf
*/ $')C&
public class SortUtil { y2G Us&09
public final static int INSERT = 1; vjuFVJwL
public final static int BUBBLE = 2; 50^ux:Uv+N
public final static int SELECTION = 3; |`5IP8Z
public final static int SHELL = 4; ]dpL PR
public final static int QUICK = 5; ;Y?MbD
public final static int IMPROVED_QUICK = 6; hJ@vlMW
public final static int MERGE = 7; a[-!X7,IU
public final static int IMPROVED_MERGE = 8; 69g{oo
public final static int HEAP = 9; `t~jHe4!Y
2s\ClT
public static void sort(int[] data) { f2i:I1 p("
sort(data, IMPROVED_QUICK); 08`|C)Z!
} #Vq9 =Q2
private static String[] name={ BNu >/zGpB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E#B-JLMGl
}; ?l0eU@rwQ
E7:xPNU
private static Sort[] impl=new Sort[]{ =:-fK-d
new InsertSort(), )(G9[DG
new BubbleSort(), K3yQ0k |
new SelectionSort(), !GqFX+!Ju
new ShellSort(), ,@`?I6nKy
new QuickSort(), g'(bk@<BP
new ImprovedQuickSort(), .-KI,IU
new MergeSort(), P!eo#b^S
new ImprovedMergeSort(), 54+(o6E<
new HeapSort() *GT=U(d
}; 8h=t%zMSb
f!9i6
public static String toString(int algorithm){ 4<y
return name[algorithm-1]; 8QrpNSj4
} j[G`p^ul
}aZuCe_
public static void sort(int[] data, int algorithm) { >HP `B2Q H
impl[algorithm-1].sort(data); %71i&T F
} \i%'M%
N~v6K}`}
public static interface Sort { wVBKVb9N
public void sort(int[] data); i(}PrA
} pHV^Kv#
r;#"j%z
public static void swap(int[] data, int i, int j) { !6!)H8rX
int temp = data; 6Y9N=\`
data = data[j]; Kxr@!m"
data[j] = temp; x'GB#svi
} !+GYu;_
} T8XrmR&?PX