[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; d`J~w/] `\
} N9BfjT}
int i1=l; <2fgao&-n
int i2=mid+1; cFloaCz
for(int cur=l;cur<=r;cur++){ _ v3VUm#
if(i1==mid+1) *L#\#nh7
data[cur]=temp[i2++]; \ H!Klp
else if(i2>r) #-bz$w#*
data[cur]=temp[i1++]; (cm8x
else if(temp[i1] data[cur]=temp[i1++]; 5/m}v'S%
else Fz@9 @
data[cur]=temp[i2++]; %@Nu{?I
} |sPUb;&~
} J*+[?FXRL
L}pj+xB
} 2 UPG8]
-5#cfi4^*
改进后的归并排序: b_a6|
?=V;5H.
package org.rut.util.algorithm.support; K4Hu0
b VcA#7 uA
import org.rut.util.algorithm.SortUtil; ..UA*#%1
Z90]I<a~
/** Jqz K5)
* @author treeroot &ZI-#(P
* @since 2006-2-2 ;]^% 6B n
* @version 1.0 sk7]s7
*/ #.@-ng6C
public class ImprovedMergeSort implements SortUtil.Sort { p|Nh:4iN
tYMPqP,1.
private static final int THRESHOLD = 10; G]O5irsV
my%MXTm2
/* 40HhMTZ0-
* (non-Javadoc) kxt/I<cs
* k[{ ~eN:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R0YWe
*/ 3_ko=& B$
public void sort(int[] data) { U[W &D%'
int[] temp=new int[data.length]; zQaD&2 q
mergeSort(data,temp,0,data.length-1); nfksi``Vq
} 7R$O~R3p
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private void mergeSort(int[] data, int[] temp, int l, int r) { K>G.HN@
int i, j, k; w$"^)EG,7
int mid = (l + r) / 2; }mpFo2
if (l == r) "w3%BbIx
return; ew<_2Xy"<
if ((mid - l) >= THRESHOLD) y+nX(@~f]
mergeSort(data, temp, l, mid); XvVi)`8!u
else UHR%0ae
insertSort(data, l, mid - l + 1); P~s u]+
if ((r - mid) > THRESHOLD) ZP'0=
mergeSort(data, temp, mid + 1, r); -`UOqjb]3
else *auT_*
insertSort(data, mid + 1, r - mid); \&[(PNl
0[E\h
for (i = l; i <= mid; i++) { Q hdG(`PY~
temp = data; {@hJPK8
} b>Ea_3T/
for (j = 1; j <= r - mid; j++) { NuW6~PV
temp[r - j + 1] = data[j + mid]; q7<=1r+
} *Sps^Wl
int a = temp[l]; X.ecA`0
int b = temp[r]; 8*Ty`G&v
for (i = l, j = r, k = l; k <= r; k++) { i6<uj
if (a < b) { & H8 %
data[k] = temp[i++]; <<R2 X1
a = temp; #4<=Ira5
} else { NS-0-o|4#
data[k] = temp[j--]; _|T{2LvwT
b = temp[j]; NxnaH!wS
} 3)I]bui
} uU%Z%O
} ?TJ4L/"(k6
>Y(JC#M;
/** 7M8cF>o
* @param data TbLU[(m-n
* @param l k(o(:-+x
* @param i X,bhX/h
*/ rgDl%X2B
private void insertSort(int[] data, int start, int len) { [w!T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z?pi/`y8>
} X&IT s
} F{^\vFp
} <@[;IX`YN
} bR,Es~n
cQ'x]u_
堆排序： [ r
=CO) Q2
package org.rut.util.algorithm.support; MV2$0
%a|Qw(4\
import org.rut.util.algorithm.SortUtil; TQb@szp:|
;K~=? k
/** Pm%5c\ef
* @author treeroot HDTA`h?t;
* @since 2006-2-2 P j,H]
* @version 1.0 Hpa6;eT
*/ ?PqkC&o[q
public class HeapSort implements SortUtil.Sort{ + K`.ck
\o=9WKc
/* (non-Javadoc) w>8kBQ?b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v*0J6<
*/ yf!7 Q>_G^
public void sort(int[] data) { 4f~sRubK
MaxHeap h=new MaxHeap(); ^/$dSXKF
h.init(data); >F:1a\c
for(int i=0;i h.remove(); IZm6.F
System.arraycopy(h.queue,1,data,0,data.length); &@'%0s9g
} ~cyKPg6
(X-( WMsqQ
private static class MaxHeap{ Nsq=1) <
H }]Zp
void init(int[] data){ (+;D~iN`k
this.queue=new int[data.length+1]; .AOc$Nt
for(int i=0;i queue[++size]=data; bcjh3WP
fixUp(size); >N2kWSa
} A,tg268
} J%|;
AZE%fOG<i
private int size=0; 04&S.#+(
XR9kxTuk
private int[] queue; 38m9t'
y9]7LETv\M
public int get() { P^=B6>e
return queue[1]; pbDr:kBL
} Te~jYkCd
u{&=$[;
public void remove() { p7Zeudmj
SortUtil.swap(queue,1,size--); 5de1rB|
fixDown(1); eY`9J4o'
} j^8HTa0Cy|
file://fixdown v;G/8>GRy
private void fixDown(int k) { r>|S4O
int j; ^H2TSaJ;
while ((j = k << 1) <= size) { .sQV0jF{
if (j < size %26amp;%26amp; queue[j] j++; xi.?@Lff
if (queue[k]>queue[j]) file://不用交换 U&:-Vf~&
break; U';)]vB$
SortUtil.swap(queue,j,k); 0PFC%x
k = j; fKFD>u0%
} w5)KWeGa
} FZ<6kk4
private void fixUp(int k) { T,a{mi.hNR
while (k > 1) { .t>SbGC
int j = k >> 1; !Sy9v
if (queue[j]>queue[k]) "k
break; (zy|>u
SortUtil.swap(queue,j,k); ~H?v L c;>
k = j; 9;vES^
} *L>usLh
} @ YWuWF
)v+&l9D
} pX3El$p
UHi^7jQ
} hUp3$4w
f>mEX='w
SortUtil： !@Vj&>mH$
A>F&b1
package org.rut.util.algorithm; XAF]B,h=
5oYeUy>N
import org.rut.util.algorithm.support.BubbleSort; 9"1=um=
import org.rut.util.algorithm.support.HeapSort; i>G:*?a
import org.rut.util.algorithm.support.ImprovedMergeSort; `Has3AX8
import org.rut.util.algorithm.support.ImprovedQuickSort; HlkjyD8
import org.rut.util.algorithm.support.InsertSort; OEbZs-:
import org.rut.util.algorithm.support.MergeSort; hZUS#75M5
import org.rut.util.algorithm.support.QuickSort; FU}- .Ki
import org.rut.util.algorithm.support.SelectionSort; R*LPwJuv
import org.rut.util.algorithm.support.ShellSort; XM?c*,=fu
#&S<{75A
/** ?H!&4o
* @author treeroot j9RpYz
* @since 2006-2-2 kIt1kw
* @version 1.0 DX3jE p2
*/ p{r{}iYI
public class SortUtil { 98<^!mwF
public final static int INSERT = 1; WYCDEoqU2
public final static int BUBBLE = 2; YWi Y[
public final static int SELECTION = 3; Pj8Vl)8~NV
public final static int SHELL = 4; )0;O<G] d
public final static int QUICK = 5; Cd p_niF
public final static int IMPROVED_QUICK = 6; ,<OS:]
public final static int MERGE = 7; l~kxK.Ru
public final static int IMPROVED_MERGE = 8; GBd mT-7
public final static int HEAP = 9; !a'{gw
<_bGV
public static void sort(int[] data) { T z+Y_
sort(data, IMPROVED_QUICK); RhjU^,%
} W`wT0kP?*]
private static String[] name={ F 'HYWH0?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D{[i_K
}; SnO,-Rg
wYHyVY2tj2
private static Sort[] impl=new Sort[]{ e=u}J%|
new InsertSort(), Xd~lifF
new BubbleSort(), _&@cU<bdee
new SelectionSort(), 2fUz}w (
new ShellSort(), hM(Hq4ed,
new QuickSort(), <lSo7NkR
new ImprovedQuickSort(), AlgVsE%Va
new MergeSort(), 5hiuBf<
new ImprovedMergeSort(), :Sk<0VVd7
new HeapSort() =OA7$z[
}; cC,gd\}M
X^0jS
public static String toString(int algorithm){ GlXzH1wZ
return name[algorithm-1]; !{oP'8Ax$
} sWLH"'Z
sE(mK<{pk
public static void sort(int[] data, int algorithm) { umiD2BRZ
impl[algorithm-1].sort(data); C1~Ro9si
} @j4~`~8
*_yp]z"
public static interface Sort { 3+%L[fW`/
public void sort(int[] data); }KrZ6cG9#
} HmEU;UbO-
<QE/p0.
public static void swap(int[] data, int i, int j) { &$NVEmW-J
int temp = data; C F<
data = data[j]; qZP>h4
data[j] = temp; V6 ,59
} P1QGfp0-J
} D'Sdz\:4