[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; ;Rrh$Ag
} %pC<T*f
int i1=l; ,/;Aew;
int i2=mid+1; 1'kO{Ge*p:
for(int cur=l;cur<=r;cur++){ X\}l" ]
if(i1==mid+1) R+ * ; [
data[cur]=temp[i2++]; zp:dArh0
else if(i2>r) =Tj{)=^/#
data[cur]=temp[i1++]; &,X}M
else if(temp[i1] data[cur]=temp[i1++]; mG~_*8}e<
else ?w3RqF@}
data[cur]=temp[i2++]; =%Y1]F
} YagfCi ?
} k(gbUlCc
K9!HW&?<|
} }LHYcNw^z
]33!obM
改进后的归并排序: TOwd+]B
%xt9k9=vZ
package org.rut.util.algorithm.support; "TZq")-
(lk9](;L
import org.rut.util.algorithm.SortUtil; TCr4-"`r-{
^Hd[+vAvR
/** ( }-*irSsj
* @author treeroot HiCh:IP7>/
* @since 2006-2-2 EX8JlA\-W
* @version 1.0 5mH[|_
*/ _^NX`<&
public class ImprovedMergeSort implements SortUtil.Sort { > p`,
hFtV\xFK
private static final int THRESHOLD = 10; .<x6U*)\O
+8Xjk\Hi
/* I!x.bp~V!
* (non-Javadoc) KX)n+{
* L2}\Ah"[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /6x&%G:m#
*/ *"%TAe7?~+
public void sort(int[] data) { ]\,?u /
int[] temp=new int[data.length]; ["-rDyP
mergeSort(data,temp,0,data.length-1); {)YbksrJ{
} @rl5k(
X! d-"[
private void mergeSort(int[] data, int[] temp, int l, int r) { Gh;\"Qx
int i, j, k; mdi!Q1pS
int mid = (l + r) / 2; {u'szO}k
if (l == r) o`T.Zaik,
return; $)lkiA&;
if ((mid - l) >= THRESHOLD) KVi6vdgD
mergeSort(data, temp, l, mid); ?N#I2jxaD
else *?)MJ@
insertSort(data, l, mid - l + 1); +! 1_Mt6
if ((r - mid) > THRESHOLD) 1d^~KBfv
mergeSort(data, temp, mid + 1, r); n,N->t$i
else ,d"T2Hy
insertSort(data, mid + 1, r - mid); &<&tdShI
jqUVERbc
for (i = l; i <= mid; i++) { i~@gI5[k+
temp = data; \CB^9-V3
} !np_B0`
for (j = 1; j <= r - mid; j++) { |t,sK aL
temp[r - j + 1] = data[j + mid]; $BqiC!~
} (tK_(gO
int a = temp[l]; sh/,"b2!P
int b = temp[r]; |G j.E
for (i = l, j = r, k = l; k <= r; k++) { _@5Xmr
if (a < b) { _c5@)I~
data[k] = temp[i++]; ]U?nYppV
a = temp; }$ y.qqG
} else { G[64qhTC
data[k] = temp[j--]; ,@*5x'auK
b = temp[j]; rH}|~
} $LP(\T([
} _i=*0Q
} Z{8%Cln
* #yF`_p
/** K\xz|Gq
* @param data V@'Xj .ze
* @param l `M@ESA(e
* @param i p=+Y7NE)
*/ [(X~C*VdxM
private void insertSort(int[] data, int start, int len) { 5'!fi]Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1+%UZK= K
} .k#PrT1C
} y?sz&*:
} ZCCCuB
} dc$zW^i
Y3~Uz#`SU
堆排序： r=j?0k '}]
LkbD='\=
package org.rut.util.algorithm.support; e=Ox~2S
$tlBI:ay1
import org.rut.util.algorithm.SortUtil; ^ AZ#tp%)
b8!oZ~K
/** 6 AO(A *
* @author treeroot 2;)IBvK
* @since 2006-2-2 /xn|d#4
* @version 1.0 2> a&m>
*/ ,xwiJfG; ]
public class HeapSort implements SortUtil.Sort{ \kE0h\
ys=2!P-[#
/* (non-Javadoc) 175e:\Tw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %1&X+s3
*/ G^'We6<
public void sort(int[] data) { g;l K34{
MaxHeap h=new MaxHeap(); kNuvJ/St
h.init(data); ^-%'ItVO
for(int i=0;i h.remove(); 8\J$\Edv
System.arraycopy(h.queue,1,data,0,data.length); l;-2hZ
} Tzd#!Lvm:,
~-"CU:$o
private static class MaxHeap{ h;=~%2Y
r^k+D<k[7
void init(int[] data){ =Jp:dM*
this.queue=new int[data.length+1]; O%t? -h
for(int i=0;i queue[++size]=data; = MByD&o`
fixUp(size); 5;`Ot2
} kEh9J>|M
} {-)^?Zb @
Csyh 'v
private int size=0; 6;E3|st1X
,Uh^e]pC
private int[] queue; |=5zI6pT
"8Dm7)nB
public int get() { lz^Vi!|p
return queue[1]; uh\G6s!4/
} _DR@P(0>_
^"Bhp:o2
public void remove() { BOpZ8p'eH1
SortUtil.swap(queue,1,size--); :ok.[q
fixDown(1); Y`gO:d8
} Q8m~L1//S
file://fixdown % jDH{xSMb
private void fixDown(int k) { >{AE@@PB^
int j; c@A.jc
while ((j = k << 1) <= size) { hy/g*>
if (j < size %26amp;%26amp; queue[j] j++; 6+=_p$crMx
if (queue[k]>queue[j]) file://不用交换 !\b-Ot(
break; j32*9
SortUtil.swap(queue,j,k); taDe^Istj
k = j; kB+$Kt<]L
} :@(1~Hm
} CUDA<Fm
private void fixUp(int k) { q:_:E*o
while (k > 1) { e;v7!X
int j = k >> 1; dPO"8HQ
if (queue[j]>queue[k]) CLND[gc
break; 0}GO$%l
SortUtil.swap(queue,j,k); 7<LuL
k = j; E2|M#Y
} Av.`'.b
} 1PVZGZxAgv
pZ Uy (
} ts=D
}:?*n:g5
} DXJw)%G w
X$<pt,}%
SortUtil： U_jW5mgsG
Mn5(Kw?o2J
package org.rut.util.algorithm; yR5XcPoKI
} ew{WD
import org.rut.util.algorithm.support.BubbleSort; \HxF?i "
import org.rut.util.algorithm.support.HeapSort; RZEq@q
import org.rut.util.algorithm.support.ImprovedMergeSort; zMepF]V
import org.rut.util.algorithm.support.ImprovedQuickSort; N75U.;U0
import org.rut.util.algorithm.support.InsertSort; <j,I@%
import org.rut.util.algorithm.support.MergeSort; ?121 as}z
import org.rut.util.algorithm.support.QuickSort; '7' 73
import org.rut.util.algorithm.support.SelectionSort; <Z[Z&^
import org.rut.util.algorithm.support.ShellSort; SN|!FW.*:
C;ab-gh
/** YdV.+v(30
* @author treeroot JQLQS
* @since 2006-2-2 P|1 D6
* @version 1.0 RrLj5Jq
*/ _9-;35D_
public class SortUtil { _W@sFv%sj
public final static int INSERT = 1; xTk6q*NvT^
public final static int BUBBLE = 2; [#wt3<d`)
public final static int SELECTION = 3; 3N]ushMO
public final static int SHELL = 4; b+Sj\3fX
public final static int QUICK = 5; ql%K+4@
public final static int IMPROVED_QUICK = 6; i=5!taxu}E
public final static int MERGE = 7; eG+$~\%Fub
public final static int IMPROVED_MERGE = 8; O-0 5.
public final static int HEAP = 9; 'RwfW|~6
Qraq{'3
public static void sort(int[] data) { yl*%P3m|
sort(data, IMPROVED_QUICK); ;=2JbA+"G
} zM8 jjB
private static String[] name={ k %{q q v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 37n2#E
}; .WeSU0XG
Q@p'nE,
private static Sort[] impl=new Sort[]{ pv4#`.m
new InsertSort(), BZOl&G(
new BubbleSort(), dJzaP
new SelectionSort(), E*R-Dno_F
new ShellSort(), /0`Eux\
new QuickSort(), t<+>E_Xw
new ImprovedQuickSort(), Z$i?p;HnW
new MergeSort(), n=f?Q=h\3
new ImprovedMergeSort(), "4KyJ;RA*
new HeapSort() |0^IX
}; V6>{k_0{V
`?^<r%*F.
public static String toString(int algorithm){ zgS)j9q}
return name[algorithm-1]; ys)
} X'.lh#&
?&6|imPE
public static void sort(int[] data, int algorithm) { 3f>9tUWhTy
impl[algorithm-1].sort(data); 8bw,dBN
} zn'Mi:O'p
c.Izm+9k
public static interface Sort { {OQ)Np!
public void sort(int[] data); uR=*q a
} N f?\O@
2/ )~$0
public static void swap(int[] data, int i, int j) { {y|.y~vW
int temp = data; f% 8n?f3;u
data = data[j]; Dd OK&
data[j] = temp; J;V#a=I
} 3Zz_wr6
} sw$JY}Q8x