[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; .U 39nd
} U+} y %3l
int i1=l; as(*B-_n~
int i2=mid+1; jn^fgH?
for(int cur=l;cur<=r;cur++){ Oxv+1Ub<Dv
if(i1==mid+1) q[P~L`h S
data[cur]=temp[i2++]; -KiRj!v|
else if(i2>r) EL7T'zJ$
data[cur]=temp[i1++]; .a,(pq Jg
else if(temp[i1] data[cur]=temp[i1++]; F$h'p4$T
else ds]?;l"
data[cur]=temp[i2++]; |<rfvsQ.
} ^!}F%
} <1 S+'
Ihg~Q4t
} MKC$;>i
V\AK6U@r^
改进后的归并排序: 0~]QIdu{AR
'irGvex
package org.rut.util.algorithm.support; E_3r[1l
/'4Q{8.a
import org.rut.util.algorithm.SortUtil; EjSD4
yp p4L|R
/** 4{Udz!
* @author treeroot 9#Y2`pT
* @since 2006-2-2 zmb@*/fK
* @version 1.0 p![&8i@ym
*/ nhewDDu
public class ImprovedMergeSort implements SortUtil.Sort { #W|!fILL
IBET'!j4"
private static final int THRESHOLD = 10; ufPCx|x~
H* /&A9("
/* ({e7U17[#
* (non-Javadoc) 2:'lZQ
* (@q3^)I4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )[jy[[K(
*/ g/#~N~&
public void sort(int[] data) { Fg=v6j4W
int[] temp=new int[data.length]; o@3B(j;J`
mergeSort(data,temp,0,data.length-1); /UHp [yod
} vLDi ;
!BUi)mo
private void mergeSort(int[] data, int[] temp, int l, int r) { Rg&19}BU
int i, j, k; A$@o'Q;he
int mid = (l + r) / 2; :Fw?{0
if (l == r) ZMdW2_*F
return; fa{@$ppx
if ((mid - l) >= THRESHOLD) 6V2j*J
mergeSort(data, temp, l, mid); B\[-fq
else 3gc"_C\$
insertSort(data, l, mid - l + 1); %ek"!A
if ((r - mid) > THRESHOLD) h<Wg3o
mergeSort(data, temp, mid + 1, r); tpo>1|
else #ZWl=z5aBi
insertSort(data, mid + 1, r - mid); <KLg0L<W
.S_QQM}Q
for (i = l; i <= mid; i++) { U5<@<j(@
temp = data; V#J"c8n
} J`<f
for (j = 1; j <= r - mid; j++) { +"uwV1)b"
temp[r - j + 1] = data[j + mid]; <d"Gg/@a
} f`|G]da-3o
int a = temp[l]; X NE+(Bt
int b = temp[r]; }0;Sk(B>
for (i = l, j = r, k = l; k <= r; k++) { C[8KlD
if (a < b) { \Ye%o}.{
data[k] = temp[i++]; iBoEZEHjw
a = temp; <hv7s,i
} else { {|6z+vR
data[k] = temp[j--]; gz61FW
b = temp[j]; 5B*qbM
} $.:3$et@/
} sPCMckt
} |>2:eH
CH;;V3
/** tpYa?ZCM
* @param data Yy h=G
* @param l [Oy >R
* @param i FT.@1/)
*/ ~`R1sSr"
private void insertSort(int[] data, int start, int len) { G{o+R]Us
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z+/LS5$
} }OrYpZob
} 1[DS'S
} 0S.?E.-&0
} "={L+di:M
v!trsjb
堆排序： `?uPn~,e8
+< KNY
package org.rut.util.algorithm.support; "}zda*z8
]XUSqai
import org.rut.util.algorithm.SortUtil; l1<?ONB.#
GwQn;gkF
/** $]*d#`Sy{%
* @author treeroot ~/|zlu*jpc
* @since 2006-2-2 _tj&Psp
* @version 1.0 Dp^/gL=
*/ 54q3R`y
public class HeapSort implements SortUtil.Sort{ }q'WC4.
JJ5C}`(
/* (non-Javadoc) frqJN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z*LiweR-
*/ hZN<Yd8:
public void sort(int[] data) { ~G`J r
MaxHeap h=new MaxHeap(); ,4Y*:JU4
h.init(data); [6RfS
for(int i=0;i h.remove(); gX,9Gh
System.arraycopy(h.queue,1,data,0,data.length); 2[up+;%Y
} A]?^ H<
` X}85
private static class MaxHeap{ / Z!i;@Wf
D$nK`r
void init(int[] data){ -0 0}if7
this.queue=new int[data.length+1]; !kXeO6X@m
for(int i=0;i queue[++size]=data; G9RP^
fixUp(size); 0{R/<N
} B*,?C]0{
} c3k|G<C2
NHkL24ve
private int size=0; 1q]c7"
AuCWQ~
private int[] queue; FT/amCRyT
wFL3&*
public int get() { 84M3c
return queue[1]; CLN+I'uX0
} %S#WPD'Y
Hr }k5'
public void remove() { ow.6!tl0=h
SortUtil.swap(queue,1,size--); rkYjq4Z@
fixDown(1); =Od>;|]m
} tt4+m>/T
file://fixdown #D)x}#V\
private void fixDown(int k) { }.{}A(^YR
int j; O3%[dR
while ((j = k << 1) <= size) { s#^pC*,'
if (j < size %26amp;%26amp; queue[j] j++; k/lFRi-i
if (queue[k]>queue[j]) file://不用交换 I]uhi{\C
break; @GGccF
SortUtil.swap(queue,j,k); 2c:f<>r0y
k = j; &1Fply7(Ay
} l4ouZR
} 8#f$rs(}
private void fixUp(int k) { ax@H"d&
while (k > 1) { 7co`Zw4}g
int j = k >> 1; d^84jf.U
if (queue[j]>queue[k]) OD+5q(!"a
break; P(h5=0`*PR
SortUtil.swap(queue,j,k); 2p:r`THvS5
k = j; ;V.vfar
} r4;Bu<PQN1
} !T'X 'Q
nq;#_Rkr
} X~RH^VYv
z\.1>/Z=
} nyhMnp#<
z $6JpG
SortUtil： C6@t
'IQsve7cI
package org.rut.util.algorithm; LSkk;)'2K
XDLEVSly7
import org.rut.util.algorithm.support.BubbleSort; c> G@+
import org.rut.util.algorithm.support.HeapSort; -G b-^G
import org.rut.util.algorithm.support.ImprovedMergeSort; ?~F. /
import org.rut.util.algorithm.support.ImprovedQuickSort; 9L)L|4A.l
import org.rut.util.algorithm.support.InsertSort; I/p]DT
import org.rut.util.algorithm.support.MergeSort; ixw(c&gL
import org.rut.util.algorithm.support.QuickSort; % vS8?nG
import org.rut.util.algorithm.support.SelectionSort; WC-_+9)2&
import org.rut.util.algorithm.support.ShellSort; n33kb/q*
U9ZbVjqv@
/** a8s4T$
* @author treeroot b!a %YLL
* @since 2006-2-2 ^M Ey,
* @version 1.0 BaL]mIx
*/ A=`*r*
public class SortUtil { <qY5SV,
public final static int INSERT = 1; crn k|o
public final static int BUBBLE = 2; h<3p8eB
public final static int SELECTION = 3; P s#>y&
public final static int SHELL = 4; kO ![X^V
public final static int QUICK = 5; R&So4},B
public final static int IMPROVED_QUICK = 6; 3g'+0tEl
public final static int MERGE = 7; a%K}j\M
public final static int IMPROVED_MERGE = 8; )HVcG0H1
public final static int HEAP = 9; \Ph7(ik
C\Ayv)S#2
public static void sort(int[] data) { pm]fQuq
sort(data, IMPROVED_QUICK); @"8R3BN
} ;<-7*}Dj
private static String[] name={ rn" pKUd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \P?A7vuhLs
}; s4,(26y
}kPVtSQ
private static Sort[] impl=new Sort[]{ ;CmOsA,1
new InsertSort(), !N~*EI$
new BubbleSort(), nem@sB;v#
new SelectionSort(), L[C*@ uK
new ShellSort(), gq4 . d
new QuickSort(), DuNcX$%%
new ImprovedQuickSort(), r95zP]T
new MergeSort(), u!1/B4!'O
new ImprovedMergeSort(), B8~=RmWLl
new HeapSort() (@Zcx9
}; _01Px a2.
fIyPFqf7w)
public static String toString(int algorithm){ 6tdI6
return name[algorithm-1]; 2k+16/T
} -e*BqH2t
v2J0u:#,
public static void sort(int[] data, int algorithm) { Q!$IQJ]|Y
impl[algorithm-1].sort(data); D'L{wm
} #&siHHs \
zilaP)5x6
public static interface Sort { 4}-#mBV]/
public void sort(int[] data); wj%wp[KA$
} j=j+Nf$
9#@Zz4Ww
public static void swap(int[] data, int i, int j) { IVteF*8hU
int temp = data; ,F:=(21
data = data[j]; (~#G'Hd
data[j] = temp; }1m_o@{3P
} "{( [!
} ( V4G<-jG