[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; TmZ% ;TN
} {_GhS%
int i1=l; UQmdm$.
int i2=mid+1; bT^6AtsJ
for(int cur=l;cur<=r;cur++){ b'1n1L
if(i1==mid+1) sOegR5?;
data[cur]=temp[i2++]; h/7m.p]
else if(i2>r) ^h}xFiAV#
data[cur]=temp[i1++]; bG`aF*10)!
else if(temp[i1] data[cur]=temp[i1++]; dWhki|c
else 9"5J-a'
data[cur]=temp[i2++]; ev}lb+pr)_
} hx4X#_)v
} .d)X.cO
21b
} [YbnpI
MlDWK_y_&
改进后的归并排序: hmfO\gc}y
5C}1iZEJ
package org.rut.util.algorithm.support; S${n:e0\
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import org.rut.util.algorithm.SortUtil; _O76Aw-@l
j06q3N"
/** R!mFMw"
* @author treeroot Y7TW_[_u
* @since 2006-2-2 VI{!ZD]
* @version 1.0 @2>A\0U
*/ k E^%w?C
public class ImprovedMergeSort implements SortUtil.Sort { Sn(e@|!G
^Jv$Wx
private static final int THRESHOLD = 10; oa4{s&db-
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/* bi^[Eh
* (non-Javadoc) Pz+2(Z
* sop*?0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UMcQqV+vT
*/ 8F?6Aq1B
public void sort(int[] data) { F/91Es
int[] temp=new int[data.length]; %XX(x'^4
mergeSort(data,temp,0,data.length-1); ~N<zv({lG
} 5crd.1@^
k[{h$
private void mergeSort(int[] data, int[] temp, int l, int r) { Fx6c*KNX3
int i, j, k; =l7@YCj5c
int mid = (l + r) / 2; - '<K_e;
if (l == r) 2pKkg>/S
return; G?p !*7N
if ((mid - l) >= THRESHOLD) p_^Jr*Mv
mergeSort(data, temp, l, mid); =;hz,+
else it Byw1/
insertSort(data, l, mid - l + 1); (n4\$LdP-
if ((r - mid) > THRESHOLD) 3`%]3qd}
mergeSort(data, temp, mid + 1, r); ljr?Z,R4
else %25GplMT
insertSort(data, mid + 1, r - mid); %\i OX|F_
fVb~j;
for (i = l; i <= mid; i++) { >iZ"#1ZL2O
temp = data; [{}Hk%wlX
} z|pC*1A\
for (j = 1; j <= r - mid; j++) { d`}t!]Gg
temp[r - j + 1] = data[j + mid]; _#9F@SCA
} u,E_Ezq
int a = temp[l]; 8%eWB$<X
int b = temp[r]; UDBMf2F]
for (i = l, j = r, k = l; k <= r; k++) { ! MTmG/^
if (a < b) { O)bc8DyI
data[k] = temp[i++]; {`-f<>N3
a = temp; dF@m4U@L
} else { F(!9;O5J]
data[k] = temp[j--]; 2.,4b-^
b = temp[j]; 6cO36
} 7?U)V03
} pTQ70V3
} O,a1?_m8
-2o_ L?
/** DG%vEM,y
* @param data v(|Arm?
* @param l tsYBZaH
* @param i 50<QF
*/ QPc4bg\J~t
private void insertSort(int[] data, int start, int len) { VxgP^*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (_9u<
} W 'w{}|
} ^k*h
} {5GXN!f
} ~AvB5
4qsP/`8
堆排序： 9;ZaL7>
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package org.rut.util.algorithm.support; -Lo3@:2i
nzcXL =^r3
import org.rut.util.algorithm.SortUtil; z(YzK
d~0k}|>
/** (dH "b *
* @author treeroot uK6'TJ
* @since 2006-2-2 n'5LY9"
* @version 1.0 ZH~=;S-t
*/ :637MD>5lO
public class HeapSort implements SortUtil.Sort{ MWl2;qi
)z".lw
/* (non-Javadoc) QWncKE,O$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yhuzjn
*/ y#B4m`9
public void sort(int[] data) { H Q_IQ+
MaxHeap h=new MaxHeap(); ++gWyzD
h.init(data); 762c`aP_(
for(int i=0;i h.remove(); _ SuW86
System.arraycopy(h.queue,1,data,0,data.length); :{g;J
} &1 BACKu
6zZT5 Kn
private static class MaxHeap{ f>!H<4 ]
+u[^@>_I0
void init(int[] data){ I2&R+~ktR
this.queue=new int[data.length+1]; }!`_Bz:
for(int i=0;i queue[++size]=data; x\i+MVR-
fixUp(size); #n_gry!5
} |7$Q'3V
} B-1Kfc
D;Bij=
private int size=0; Qo5yfdR
-$A >b8
private int[] queue; 4#Bzq3,|
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public int get() { kgv29j?k;
return queue[1]; )` ^/Dj;
} S^q%+Z
jap5FG+2
public void remove() { KHTRoXt
SortUtil.swap(queue,1,size--); >7$h
fixDown(1); <K:L.c!
} v;WfcpWq2
file://fixdown {hH8+4c7
private void fixDown(int k) { B>kVJK`X
int j; !r#36kO
while ((j = k << 1) <= size) { f;`7}7C
if (j < size %26amp;%26amp; queue[j] j++; 2Kmnt(>
if (queue[k]>queue[j]) file://不用交换 <1pRAN0
break; HYwtGj~5
SortUtil.swap(queue,j,k); 4;|@eN
k = j; @UK%l :L
} N?{.}-Q
} 8o SL3
private void fixUp(int k) { '3uN]-A>D
while (k > 1) { =j!nt8]8
int j = k >> 1; \gW6E^
if (queue[j]>queue[k]) ev[!:*6P
break; mb?r{WCi
SortUtil.swap(queue,j,k); ) >H11o{&
k = j; X 2Zp@q(
} p6&6^v\
} "<$JU@P
aInh?-
} \uyZl2=WWa
*K'#$`2
} +=Y$v2BZA3
XEL~y
SortUtil： E5X#9;U8E"
!<UdG+iV
package org.rut.util.algorithm; hcT5>w[
?~9o2[
import org.rut.util.algorithm.support.BubbleSort; f~R`RBZ]9
import org.rut.util.algorithm.support.HeapSort; [NU@A>H
import org.rut.util.algorithm.support.ImprovedMergeSort; c?%}J\<n
import org.rut.util.algorithm.support.ImprovedQuickSort; WX&0;Kr
import org.rut.util.algorithm.support.InsertSort; Ru~;awV?
import org.rut.util.algorithm.support.MergeSort; 'h#>@v> }
import org.rut.util.algorithm.support.QuickSort; hbSXa'
import org.rut.util.algorithm.support.SelectionSort; h @2.D|c)g
import org.rut.util.algorithm.support.ShellSort; [2.;gZj
QR\2%}9b
/** S#F%OIx
* @author treeroot (J5M+K\H
* @since 2006-2-2 u|sdQ
* @version 1.0 EG J/r
*/ AkEt=vI
public class SortUtil { ayZWt| iHA
public final static int INSERT = 1; (r-8*)Qh8
public final static int BUBBLE = 2; LJwy,-
public final static int SELECTION = 3; _X~xfmU
public final static int SHELL = 4; r<1.'F
public final static int QUICK = 5; bcUa'ZfN<
public final static int IMPROVED_QUICK = 6; ?hOvY)
public final static int MERGE = 7; `s\E"QeZN
public final static int IMPROVED_MERGE = 8; KN:V:8:J
public final static int HEAP = 9; Kwo0%2Onkd
@ [<B:Tqo
public static void sort(int[] data) { Dq<!wtFG[
sort(data, IMPROVED_QUICK); :OD-L)Or
} X_(n
private static String[] name={ 2!nz>K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;0nL1R]w(
}; {q/D,Rh8
0[92&:c,
private static Sort[] impl=new Sort[]{ '"9Wt@ .
new InsertSort(), 0O|l7mCr%I
new BubbleSort(), F @uOXNz)
new SelectionSort(), NI2-*G_M
new ShellSort(), uX8G<7O^
new QuickSort(), }UWi[UgA
new ImprovedQuickSort(), '^`%
new MergeSort(), | W<jN
new ImprovedMergeSort(), 5iZ;7 ?(
new HeapSort() ]DK.4\^
}; PX5U)
|D~#9
public static String toString(int algorithm){ [g@.dr3t
return name[algorithm-1]; |Li9Y"5
} 7,2#0Z`ge
>_u5"&q
public static void sort(int[] data, int algorithm) { DxzNg_E]
impl[algorithm-1].sort(data); "64D.c(r$
} qj*77
b/&{:g!B
public static interface Sort { @WuG8G
public void sort(int[] data); 8C5*:x9l
} tREC)+*\
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public static void swap(int[] data, int i, int j) { f"d4HZD^
int temp = data; L r9z~T:ED
data = data[j]; T%@qlEmf
data[j] = temp; |K'7BK_^J
} 7KZ>x*o
} `m\l#r2C