[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; {G <kA(Lm
} J=.`wZQkS
int i1=l; DAo~8H
int i2=mid+1; bjAnaya
for(int cur=l;cur<=r;cur++){ V8eB$in
if(i1==mid+1) rc+C?)S
data[cur]=temp[i2++]; NmMIQ@K
else if(i2>r) y_xnai
data[cur]=temp[i1++]; iU6Gp-<M,
else if(temp[i1] data[cur]=temp[i1++]; UhIDRR
else ih?^t(i
data[cur]=temp[i2++]; `eu9dLzH
} 7'NwJ,$6\
} 4f(Kt,0
=^H4Yck/5
} @HZKc\1
wts=[U`(
改进后的归并排序: T~h5B(J;
jxJv.
package org.rut.util.algorithm.support; :4v3\+T
g$. \
import org.rut.util.algorithm.SortUtil; '!f5?O+E
p4VeRJk%
/** hHqh{:q{v
* @author treeroot Kscd}f)yx?
* @since 2006-2-2 ]kG(G%r|M
* @version 1.0 nx0K$Ptq
*/ #+$Q+Z|6k
public class ImprovedMergeSort implements SortUtil.Sort { OFje+S
|yo\R{&6
private static final int THRESHOLD = 10; gWY"w!f
/%lZu^
/* =_YG#yS
* (non-Javadoc) 5q"ON)x
* d GP*O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4Jx"A\5*G
*/ XD"_Iq!
public void sort(int[] data) { !%dN<%Ah
int[] temp=new int[data.length]; <3,<\ub
mergeSort(data,temp,0,data.length-1); B c2p(z4
} wgd/(8d
MQin"\
private void mergeSort(int[] data, int[] temp, int l, int r) { ?`J[[",
int i, j, k; gk`zA
int mid = (l + r) / 2; H4]Ul eU
if (l == r) <V>dM4Mkr
return; l3 DYg
if ((mid - l) >= THRESHOLD) 7t.!lh5G%
mergeSort(data, temp, l, mid); 7 I>G{
else A=Ss6-Je
insertSort(data, l, mid - l + 1); Fv<`AU
if ((r - mid) > THRESHOLD) mS0udHod
mergeSort(data, temp, mid + 1, r); z2Z^~,i
else s=42uKz
insertSort(data, mid + 1, r - mid); TwgrRtj'
GRY2?'`
for (i = l; i <= mid; i++) { "--t e
temp = data; 0?>dCu\
} }pJwj
for (j = 1; j <= r - mid; j++) { Y3O#Q)-j$
temp[r - j + 1] = data[j + mid]; W0}B'VS.I
} }- Wa`t7U
int a = temp[l]; 8zMu7,E
int b = temp[r]; [|l?2j\
for (i = l, j = r, k = l; k <= r; k++) { K(q-?n`<
if (a < b) { $[yFsA6
data[k] = temp[i++]; xZV1k~C
a = temp; @}kv-*
} else { <jed!x
data[k] = temp[j--]; cYqfsd# B
b = temp[j]; `Qqk<o
} +E1h#cc)
} Bm]8m=p
} 85GKymz$P
XQS9,Hl
/** q/n,,!
* @param data }*L(;r)q
* @param l #UbF9})q
* @param i k?'B*L_Mzv
*/ RZ+`T+zL
private void insertSort(int[] data, int start, int len) { '}$Dgp6e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &iV,W4
} v,ju!I0.
} ttu&@ =
} ~*wk6&|
} @*sWu_-Y%
h*v8#\b$J_
堆排序： #f+$Ddg*
l'eyq}&
package org.rut.util.algorithm.support; !50[z:
*M"}z
import org.rut.util.algorithm.SortUtil; KRA/MQ^7~U
ow]053:i
/** hvaSH69*m
* @author treeroot !@v7Zu43,
* @since 2006-2-2 Q 7?#=N?
* @version 1.0 /Sh#_\x
*/ ^(FdXGs[
public class HeapSort implements SortUtil.Sort{ 0vw4?>Jf@
|)*fRL,
/* (non-Javadoc) Nal9M[]c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3p'I5,}
*/ ,l)^Ft`5
public void sort(int[] data) { 5@BBoeG
MaxHeap h=new MaxHeap(); %QP0
h.init(data); U-3i
for(int i=0;i h.remove(); d}4Y(
System.arraycopy(h.queue,1,data,0,data.length); >j QWn@
} aYSCw3C<
|/)${*a4n
private static class MaxHeap{ VFys.=
~ (jKz}'~U
void init(int[] data){ y9Usn8
this.queue=new int[data.length+1]; Kh_Lp$'0uM
for(int i=0;i queue[++size]=data; @nCd
fixUp(size); bXNk%W[n
} K>@+m
} 73\JwOn~
\}|o1Xh2
private int size=0; ?o|f':
ZNvEW
private int[] queue; gK'1ZLdZ2
P`cq H(
public int get() { XMu9Uk{|
return queue[1]; "[ZB+-|[0
} ][p>Y>:b-
yL-YzF2
public void remove() { )`O~f_pIC
SortUtil.swap(queue,1,size--); !*B'?|a<\
fixDown(1); 85Otss/mM
} o9dY9o+Z
file://fixdown \6Zr
private void fixDown(int k) { yj.7'{mA
int j; Evg_q>
while ((j = k << 1) <= size) { LoN< oj5
if (j < size %26amp;%26amp; queue[j] j++; ?q{,R"
if (queue[k]>queue[j]) file://不用交换 1oWED*B
break; _)>_{Pm
SortUtil.swap(queue,j,k); A#J`;5!Sc
k = j; %|q>pin2
} CU@Rob}s
} %D%8^Zd_
private void fixUp(int k) { 1e{IC=
while (k > 1) { MS 81sN\d
int j = k >> 1; '6cWS'9"
if (queue[j]>queue[k]) }o?APvd
break; \kMefU
SortUtil.swap(queue,j,k); BMG3|N^
k = j; qGB{7-ru
} &;[Io
} pS'FI@.'{
1Vrh4g.l
} $Y/9SV,
iXVe.n
} ;RC{<wBTx
=C8?M
SortUtil： 7WkB>cn
7e|s wJ>4
package org.rut.util.algorithm; '$ =>
zuJ@E=7
import org.rut.util.algorithm.support.BubbleSort; yW1)vD7
import org.rut.util.algorithm.support.HeapSort; >,$_| C
import org.rut.util.algorithm.support.ImprovedMergeSort; mGJKvJF
import org.rut.util.algorithm.support.ImprovedQuickSort; jHE}qE~>5
import org.rut.util.algorithm.support.InsertSort; ff,pvk8N5
import org.rut.util.algorithm.support.MergeSort; 93("oBd[s(
import org.rut.util.algorithm.support.QuickSort; N~goI#4
import org.rut.util.algorithm.support.SelectionSort; +./H6!
import org.rut.util.algorithm.support.ShellSort; DEG[Z7Ju
k;AD`7(=
/** Z<1FSk,[
* @author treeroot Ui_8)z _
* @since 2006-2-2 c'>/
* @version 1.0 la0BiLzb]
*/ JQ8fdP A
public class SortUtil { A}G7l?V&
public final static int INSERT = 1; u~7hWiY<2
public final static int BUBBLE = 2; _~IR6dKE
public final static int SELECTION = 3; 9ifDcYl
public final static int SHELL = 4; rb5~XnJk
public final static int QUICK = 5; #%iDT6
public final static int IMPROVED_QUICK = 6; NO "xL,
public final static int MERGE = 7; `w#Oih!6A|
public final static int IMPROVED_MERGE = 8; p Dx1z|@z
public final static int HEAP = 9; WejYy|
LSa,1{
public static void sort(int[] data) { ieDk;
sort(data, IMPROVED_QUICK); 8Wrh]egu1
} l2zFKCGF(
private static String[] name={ s@&`f{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ck ]Do!h
}; V+* P2|
lGPUIoUo
private static Sort[] impl=new Sort[]{ GY6`JWk
new InsertSort(), aktU$Wbwl
new BubbleSort(), \\r)Ue]
new SelectionSort(), 3m]4=
new ShellSort(), XX7{-Yy
new QuickSort(), bU>U14ix<
new ImprovedQuickSort(), wKtl+}}
new MergeSort(), w k(VR
new ImprovedMergeSort(), oX#Q<2z*
new HeapSort() c(3~0Yr
}; ^W`<gR
/7aBDc-v
public static String toString(int algorithm){ b*;Si7-
return name[algorithm-1]; 0t^M3+nc
} s1MErd
oibsh(J3
public static void sort(int[] data, int algorithm) { $*^kY;
impl[algorithm-1].sort(data); &vo--V1|
} *?5*m+
#X%~B'
public static interface Sort { AsQ)q
public void sort(int[] data); +DW~BS3
} 8UXjm_B^'
{'XggI%
public static void swap(int[] data, int i, int j) { `n#H5Oyn
int temp = data; <Y*+|T+&d
data = data[j]; j2Cks_$:
data[j] = temp; Fz3fwLawI
} )bS~1n_0
} .R)D3NZp