[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; sXHrCU
} T"7Ue
int i1=l; EC(,-sz\Z
int i2=mid+1; ZC}'! $r7
for(int cur=l;cur<=r;cur++){ &:1PF.)N
if(i1==mid+1) &)jBr^x#>
data[cur]=temp[i2++]; 4q sIJJ[.
else if(i2>r) x\taG.'zX
data[cur]=temp[i1++]; ct,B0(]
else if(temp[i1] data[cur]=temp[i1++]; X"_,#3Ko!
else gc``z9@Xg
data[cur]=temp[i2++]; `o~dQb/k+
} iSDE6
} *Ju$A
K.3)m]dCl
} %:i; eUKR
+M4X r*
改进后的归并排序: thG;~W
{ FVLH:{U^
package org.rut.util.algorithm.support; }diB
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import org.rut.util.algorithm.SortUtil; 3ZdheenK9
_dOR-<
/** fik*-$V`
* @author treeroot g<C_3ap/
* @since 2006-2-2 {Up@\M
* @version 1.0 TZ#(G
*/ <T]BSQk
public class ImprovedMergeSort implements SortUtil.Sort { *sNZ.Y:.
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private static final int THRESHOLD = 10; P<<?7_ ??
qKoD*cl)Za
/* &!/E&e$_
* (non-Javadoc) "rhU2jT=c
* \XDc{c]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Axb,{X[6g
*/ R9=K/
public void sort(int[] data) { Py^ _::
int[] temp=new int[data.length]; k?(x}IZdG
mergeSort(data,temp,0,data.length-1); yCznRd}J
} 5=< y%VF
) 0p9I0=
private void mergeSort(int[] data, int[] temp, int l, int r) { [[uKakp
int i, j, k; VVY#g%(K
int mid = (l + r) / 2; n-X;JYQW
if (l == r) [C1.*Q+l
return; 'Xj9sAB
if ((mid - l) >= THRESHOLD) &f12Q&jY7
mergeSort(data, temp, l, mid); w-f[h
else P#e1?
insertSort(data, l, mid - l + 1); M#<U=Ha
if ((r - mid) > THRESHOLD) <'s_3AC
mergeSort(data, temp, mid + 1, r); 8?p40x$m%
else "S8JHHx
insertSort(data, mid + 1, r - mid); k^A17Nf`2
T-"zK r!
for (i = l; i <= mid; i++) { gz{~\0y
temp = data; | %E\?-TK
} -1\*}m%1e
for (j = 1; j <= r - mid; j++) { : ?K}.Kb
temp[r - j + 1] = data[j + mid]; S"t6 *fWr
} ryhme\%l;f
int a = temp[l]; ;%-f>'KhI7
int b = temp[r]; }^T7S2_Qy
for (i = l, j = r, k = l; k <= r; k++) { Zp5;=8wa;
if (a < b) { >lyX";X#
data[k] = temp[i++]; 05$;7xnf(
a = temp; ^]nnvvp
} else { sZ~q|}D-
data[k] = temp[j--]; LW+a-i
b = temp[j]; RM^3Snd=V
} SZ/}2_;
} P''5A6#5
} :.;pRz
4<`Qyul-
/** t(<^of:
* @param data K})=&<M0
* @param l )SkJgzvC
* @param i bCv=Uo,+6
*/ DV={bcQ
private void insertSort(int[] data, int start, int len) { U`{'-L.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "Jd!TLt\x
} T{9pNf-
} @|e4.(9A
} I``S%`h
} YH_mWN\Wu
+sN'Y/-
堆排序： Yd}Jz
Y}db<Cz X
package org.rut.util.algorithm.support; c~_nOd
96L-bBtyY
import org.rut.util.algorithm.SortUtil; 1|]IWX|
Vjv~RNGF
/** 6Z5X?B
* @author treeroot Ino$N|G[
* @since 2006-2-2 ^,P# <,D,
* @version 1.0 hLs<g!*O
*/ x2q6y
public class HeapSort implements SortUtil.Sort{ $0uh8RB
RK7vR~kf<
/* (non-Javadoc) wjJM\BKr`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wR7Ja cKv
*/ C*+gQeK
public void sort(int[] data) { Vrwy+o>:X
MaxHeap h=new MaxHeap(); -4rXOmiA
h.init(data); :v=^-&t
for(int i=0;i h.remove(); n*'i{P]
System.arraycopy(h.queue,1,data,0,data.length); ]4{ )VXod
} Y]zy=8q
DC&3=Nd
private static class MaxHeap{ pQQN8Y~^Y
Qs38VlR_m
void init(int[] data){ tl:V8sYTP
this.queue=new int[data.length+1]; d|P,e;m-
for(int i=0;i queue[++size]=data; W^a-K
fixUp(size); Ry$zF~[
} \a_75^2
} O\3 Lx
i~};5j(
private int size=0; ]lX`[HX7
xz$-_NWW
private int[] queue; C:*=tD1
fX ^hO+f
public int get() { .Yw
return queue[1]; }9Th`
} (D.B'V#>
:,@"I$>*/
public void remove() { _Q9Mn-&qQ
SortUtil.swap(queue,1,size--); )bd)noZi
fixDown(1); $#ve^.VHv
} -Kas9\VWEw
file://fixdown :4Gc'bR
private void fixDown(int k) { qjcPJ
int j; #[ H4`hZ
while ((j = k << 1) <= size) { &oz^dlw
if (j < size %26amp;%26amp; queue[j] j++; p)u?x)w=
if (queue[k]>queue[j]) file://不用交换 [~aRA'qJ{V
break; Q)/V>QW
SortUtil.swap(queue,j,k); b7^Db6qu
k = j; $dxk;V
} |41NRGgY
} $wr B5m?
private void fixUp(int k) { 2`|gnVw
while (k > 1) { H%nA"-
int j = k >> 1; D]?eRO9'
if (queue[j]>queue[k]) f3>L/9[[<P
break; y;\m1o2
SortUtil.swap(queue,j,k); 1BjMVMH
k = j; Z!/!4(Fh
} Q!91uNL
} v)f;dq^z-
Jbv[Ql#
} R&-Vm3mc3
&x":
} 2l4*6rYa(
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SortUtil： vcmB)P-T`O
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package org.rut.util.algorithm; iBM;$0Y
wHT]&fZ
import org.rut.util.algorithm.support.BubbleSort; {4y#+[
import org.rut.util.algorithm.support.HeapSort; D2y[?RG
import org.rut.util.algorithm.support.ImprovedMergeSort; IjPCaH.:t
import org.rut.util.algorithm.support.ImprovedQuickSort; wHR# -g'
import org.rut.util.algorithm.support.InsertSort; TQ,KPf$0U
import org.rut.util.algorithm.support.MergeSort; |zkZF|-
import org.rut.util.algorithm.support.QuickSort; zao=}j?
import org.rut.util.algorithm.support.SelectionSort; cIS?EW]S%X
import org.rut.util.algorithm.support.ShellSort; A_4.>g
A6?!BB=]
/** tl=H9w&@
* @author treeroot 8ofKj:W]
* @since 2006-2-2 rjo1
* @version 1.0 *y0=sG1+D
*/ R1/h<I:
public class SortUtil { $(r/N"6)O2
public final static int INSERT = 1; D}MCVNd^
public final static int BUBBLE = 2; lEYAq'=
public final static int SELECTION = 3; L25v7U
public final static int SHELL = 4; {@&%Bq*&
public final static int QUICK = 5; xXRlQ|84
public final static int IMPROVED_QUICK = 6; 6Mj(B*c
public final static int MERGE = 7; Z1y=L$t8
public final static int IMPROVED_MERGE = 8; .N>Th/K8
public final static int HEAP = 9; vTl7x
r$cq2pkX
public static void sort(int[] data) { 4G_At
sort(data, IMPROVED_QUICK); 3FgTM(
} CX}==0od
private static String[] name={ $<s;YhM:u)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JQ%D6b
}; 7C>5XyyJ
L)z`
private static Sort[] impl=new Sort[]{ 1EemVZdY
new InsertSort(), _/5#A+ ?
new BubbleSort(), SjL&\),
new SelectionSort(), ?/1Eu47
new ShellSort(), K(3_1*e
new QuickSort(), :Ldx^UO
new ImprovedQuickSort(), =L]GQ=d
new MergeSort(), Fd;%wWY.zm
new ImprovedMergeSort(), ]ft}fU5C1
new HeapSort() _*.ImD
}; h0aK}`/a
0}3Xry,{
public static String toString(int algorithm){ VK>Cf>
return name[algorithm-1]; (Zoopkxw
} P;U(2;9 N
)Y &RMYy
public static void sort(int[] data, int algorithm) { I /z`)
impl[algorithm-1].sort(data); GO]5~4k
} 5Ly Wg2
v+vM:At4
public static interface Sort { i@L_[d^|j`
public void sort(int[] data); C0}@0c
} 60#eTo?}o
>pm`(zLn
public static void swap(int[] data, int i, int j) { 8)ykXx/f@
int temp = data; B2^*Sr[
data = data[j]; XI\P#"
data[j] = temp; >e^^YR^
} 'w8p[h (,
} VCX^D)[-