[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; D#pZN,'
} 5e|2b] f$
int i1=l; u[>hs \3k
int i2=mid+1; ]-D&/88``
for(int cur=l;cur<=r;cur++){ 5YW.s
if(i1==mid+1) YO3$I!(
data[cur]=temp[i2++]; P\3$Y-id
else if(i2>r) [Dv6z t>
data[cur]=temp[i1++]; %{sL/H_
else if(temp[i1] data[cur]=temp[i1++]; jr=>L:
else (oiF05n h
data[cur]=temp[i2++]; _Cd_i[K[
} Tam\,j
} ,]\:]Y&?
CQ( _$
} 3!OO_
MUeS8:q-N
改进后的归并排序: -l ?J
=D"H0w <zw
package org.rut.util.algorithm.support; 6 pQbh*
2o\GU
import org.rut.util.algorithm.SortUtil; ENEnHu^
pEn3:.l<
/** .0eHP
* @author treeroot cfg_xrW0^
* @since 2006-2-2 w{HDCPuS
* @version 1.0 NETji:d
*/ (K}Md~
public class ImprovedMergeSort implements SortUtil.Sort { qOi3`6LCV
4wa8Vw`
private static final int THRESHOLD = 10; bktw?{h
tK$x=9M
/* DKzP)!B "
* (non-Javadoc) 51Nh"JTy
* Du*O|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F9Bj$`#)
*/ pH'1be{K
public void sort(int[] data) { G.}Ex!8R7_
int[] temp=new int[data.length]; _s&sA2r<
mergeSort(data,temp,0,data.length-1); c[DC
} ju@5D h
GkutS.2G#
private void mergeSort(int[] data, int[] temp, int l, int r) { 2Y+8!4^L a
int i, j, k; N)0I+>, ^
int mid = (l + r) / 2; yU"'h[^
if (l == r) pR VL}^Rk
return; HxgH*IMs
if ((mid - l) >= THRESHOLD) Q.dHg7+D
mergeSort(data, temp, l, mid); n* 7mP
else ?pLKUAh
insertSort(data, l, mid - l + 1); P!Mz5QZ+
if ((r - mid) > THRESHOLD) A)X 'We
mergeSort(data, temp, mid + 1, r); "E><:_,\
else t\p_QWnF
insertSort(data, mid + 1, r - mid); !{L6 4qI
S(5aJ[7Zm
for (i = l; i <= mid; i++) { F%v?,`_&I
temp = data; OFtAT@=O
} e+ZC<Bdh
for (j = 1; j <= r - mid; j++) { 6-'Y*
temp[r - j + 1] = data[j + mid]; XP$1CWI
} -i}@o1o\
int a = temp[l]; *Y2d!9F}Sa
int b = temp[r]; :e&P's=
for (i = l, j = r, k = l; k <= r; k++) { wF`9}9q
if (a < b) { abvA*|
data[k] = temp[i++]; ),K!|7#h
a = temp; ~TGk`cAM>
} else { 6 s+ Z
data[k] = temp[j--]; dB^')-wA
b = temp[j]; -ty_<m]
} cE*Gd^
} m>@$T x
} CDz-IQi
n-cz xq%n
/** Xu1tN9:oE
* @param data h.\9a3B:r
* @param l f"0{e9O]2
* @param i o~Im5j],*
*/ oXR%A7
private void insertSort(int[] data, int start, int len) { )eFq0+6*)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a*8^M\>m4
} 9tnW:Nw~
} D;VFMP
} =a_B'^`L
} 'WUevPmt
8#Q=CTjF
堆排序： 4YVxRZ1[3
XG5mfKMt+
package org.rut.util.algorithm.support; XZaei\rUn)
C?FUc cI
import org.rut.util.algorithm.SortUtil; #eqy!QdePf
8bB'[gJ]{
/** J% B(4`
* @author treeroot 7[l "=
* @since 2006-2-2 Dl3Df u8
* @version 1.0 ~6nq$(#
*/ ]i=\5FH e
public class HeapSort implements SortUtil.Sort{ kpkN GQ2
az(u=}
/* (non-Javadoc) <%(nF+rQA"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F:8cd^d~u
*/ &}1PH%6
public void sort(int[] data) { Xm7Nr#
MaxHeap h=new MaxHeap(); HDyus5g
h.init(data); ;b[% L&
for(int i=0;i h.remove(); ~CQYF,[Th
System.arraycopy(h.queue,1,data,0,data.length); }5RCks;)*
} ,R j{^-k
o3hsPzOQx
private static class MaxHeap{ B6gSt3w.
+G3&{#D ?
void init(int[] data){ 1RtbQ{2F;
this.queue=new int[data.length+1]; * Yr)>;^
for(int i=0;i queue[++size]=data; g`jO
fixUp(size); ,$,6%"'"
} 29?{QJb
} /x6,"M[97
,H3~mq]
private int size=0; xj/ +Z!,9
nQc]f*
private int[] queue; m~fA=#l l
7P`|wNq
public int get() { qbjLTE=
return queue[1]; zR'lQ<u
} /5@V $c8
:QnN7&j|(w
public void remove() { ?~e 8:/@
SortUtil.swap(queue,1,size--); o;XzJ#P
fixDown(1); JDi|]JY
} kzhncku
file://fixdown JkazB1h
private void fixDown(int k) { i6)$pARp
int j; .`84Y
while ((j = k << 1) <= size) { Z-RgN
if (j < size %26amp;%26amp; queue[j] j++; aClXg-
if (queue[k]>queue[j]) file://不用交换 ic:_v?k
break; We#u-#k_O
SortUtil.swap(queue,j,k); [N}:Di,S
k = j; )5r*2I
} uL^Qtmm>M
} igp[cFN
private void fixUp(int k) { SU.T0>w
while (k > 1) { Si#b"ls'
int j = k >> 1; p/B&R@%
if (queue[j]>queue[k]) 5!r?U
break; !M&L<0b:7e
SortUtil.swap(queue,j,k); cn$E?&-
k = j; /O1r=lv3Z
} AF4:v<EN
} (^'TT>2B
RLN>*X
} m$xL#omD
-MV</
} ST3aiyG
gG0P &9xz
SortUtil： 7z'l}*FRD
K.?~@5%
package org.rut.util.algorithm; ve2GRTO^aC
LlP_`fA
import org.rut.util.algorithm.support.BubbleSort; s+>VqyHgf
import org.rut.util.algorithm.support.HeapSort; U+t|wK
import org.rut.util.algorithm.support.ImprovedMergeSort; Gxu&o%x[
import org.rut.util.algorithm.support.ImprovedQuickSort; dUOvv/,FZT
import org.rut.util.algorithm.support.InsertSort; kAbRXID
import org.rut.util.algorithm.support.MergeSort; jN:!V t
import org.rut.util.algorithm.support.QuickSort; Ycypd\q/
import org.rut.util.algorithm.support.SelectionSort; O1pBr=+j+{
import org.rut.util.algorithm.support.ShellSort; 2]n"7Z8(v8
$v?+X20
/** 0 !yvcviw
* @author treeroot XJ~_FiB
* @since 2006-2-2 `y; s1nL
* @version 1.0 tuuc9H4B
*/ E.]sX_X?
public class SortUtil { 7pDov@K<{
public final static int INSERT = 1; h V@C|*A
public final static int BUBBLE = 2; 3Xgf=yG:M
public final static int SELECTION = 3; \TSt
public final static int SHELL = 4; +!IIt {u
public final static int QUICK = 5; ">]v'h(s
public final static int IMPROVED_QUICK = 6; [Q&{#%M
public final static int MERGE = 7; N"MuAUB:K
public final static int IMPROVED_MERGE = 8; 4:-h\%
public final static int HEAP = 9; [H-,zY
1\:puC\)
public static void sort(int[] data) { R{.5Z/Vp6E
sort(data, IMPROVED_QUICK); R9Wh/@J]
} e0%?;w-TL
private static String[] name={ _Z'j%/-4@D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" })O^xF~
}; f>i6f@
(SV(L~T_
private static Sort[] impl=new Sort[]{ /Fej)WQp
new InsertSort(), @EH:4~
new BubbleSort(), @^oOXc,r$
new SelectionSort(), ^~Nz8PCY
new ShellSort(), ^D8YF
new QuickSort(), u1a5Vtel
new ImprovedQuickSort(), rMIr&T
new MergeSort(), ,@ A1eX}
new ImprovedMergeSort(), sXp>4MomV
new HeapSort() #95.KkF
}; ri&B%AAc
2bBTd@m4
public static String toString(int algorithm){ L@Fw;G|%'
return name[algorithm-1]; Cdl#LVqs
} ; mF-y,E
dxbP'2~
public static void sort(int[] data, int algorithm) { YXxaD@
impl[algorithm-1].sort(data); _7>$'V{
} f^il|Obzl
hko0 ?z
public static interface Sort { az@{O4
public void sort(int[] data); 0qXd?z$
} J >Zd0Dn
/v"u4Ipj
public static void swap(int[] data, int i, int j) { u9rlNmf$
int temp = data; _hyboQi
data = data[j]; {s!DRc]ln
data[j] = temp; I=X-e#HM?
} Wf/Gt\?
} n5dFp%k