[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; 5;EvNu
} ,O(hMI85]
int i1=l; TeM|:o
int i2=mid+1; QWYJ*
for(int cur=l;cur<=r;cur++){ lo+A%\1
if(i1==mid+1) :F?C)F
data[cur]=temp[i2++]; 4B.*g-L
else if(i2>r) tD)J*]G
data[cur]=temp[i1++]; ga+dt
else if(temp[i1] data[cur]=temp[i1++]; y)@wjH{6
else K0>zxqY
data[cur]=temp[i2++]; !|(NgzDP/
} N6:`/f+A>T
} 1+s;FJ2}
sgFEK[w.y
} k,*XG$2h
]a`$LW}
改进后的归并排序: 0H:X3y+
WsB?C&>x
package org.rut.util.algorithm.support; 7[)E>XRE
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import org.rut.util.algorithm.SortUtil; ktIFI`@w)
M= (u]%\
/** !Uo4,g6r+
* @author treeroot $UwCMPs X
* @since 2006-2-2 ]f_p8?j"
* @version 1.0 bt?5*ETA
*/ ~xFkU#
public class ImprovedMergeSort implements SortUtil.Sort { QXK{bxwC
W=?<<dVYD
private static final int THRESHOLD = 10; ?J0y|
z24q3 3O
/* 2?Vd5xkt
* (non-Javadoc) 'g\4O3&_
* L4W5EO$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6=C<>c%+
*/ tw@X> G1z
public void sort(int[] data) { RRJ%:5&
int[] temp=new int[data.length]; L/K(dkx
mergeSort(data,temp,0,data.length-1); e0 ecD3
} UN#S;x*
!N^@4*
private void mergeSort(int[] data, int[] temp, int l, int r) { {.Jlbi9!
int i, j, k; gSj,E8-g
int mid = (l + r) / 2; R;LP:,)
if (l == r) OyIw>Wfv
return; "AqB$^S9t
if ((mid - l) >= THRESHOLD) tH4B:Bgj!
mergeSort(data, temp, l, mid); #'`{Qv0,
else KI.hy2?e
insertSort(data, l, mid - l + 1); vY3h3o
if ((r - mid) > THRESHOLD) A#,ZUOPGH
mergeSort(data, temp, mid + 1, r); fz_r7?
else %]i15;{X
insertSort(data, mid + 1, r - mid); xE}>,O|'q
8ao_i=&x
for (i = l; i <= mid; i++) { UiNP3TJ'L
temp = data; *T1_;4i
} {!`6zBsP
for (j = 1; j <= r - mid; j++) { HzJz+ x:
temp[r - j + 1] = data[j + mid]; |7~<Is~*
} dO\"?aiD
int a = temp[l]; '"s@enD0y
int b = temp[r]; XjBD{m(
for (i = l, j = r, k = l; k <= r; k++) { 0g;|y4SN=
if (a < b) { 1Y,Z %d
data[k] = temp[i++]; :4|4=mkr
a = temp; j>kqz>3
} else { q^nVN#
data[k] = temp[j--]; ;.C\Ss<>*
b = temp[j]; zuCSj~
} =(^3}x
} j<$2hiI/?&
} !r-F>!~
7>RY/O;Z,
/** *zLMpL_
* @param data AXB7oV,xt
* @param l 'GScszz
* @param i X>^fEQq"
*/ O.M1@w]
private void insertSort(int[] data, int start, int len) { 4M T 7`sr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qP ,EBE
} X3& Jb2c2
} vQ.R{!",>
} wuBPfb
} A@'OJRc
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堆排序： e+|sSpA
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package org.rut.util.algorithm.support; \<K5ZIWV
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import org.rut.util.algorithm.SortUtil; 9H~n_
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/** p4QU9DF
* @author treeroot +|f@^-
* @since 2006-2-2 }B^tL$k
* @version 1.0 u@444Vzg
*/ +,l-Nz
public class HeapSort implements SortUtil.Sort{ UZ";a453r
BLFdHB.$T
/* (non-Javadoc) DfB7*+x{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9JwPSAo;
*/ R-14=|7a-
public void sort(int[] data) { ~Gw*r\\+
MaxHeap h=new MaxHeap(); 0}9h]X'
h.init(data); d5-qZ{W
for(int i=0;i h.remove(); m+9#5a-
System.arraycopy(h.queue,1,data,0,data.length); 7:~_D7n
} ,u m|1dh
('~LMu_
private static class MaxHeap{ !m$jk2<
#E]59_
void init(int[] data){ Va8&Z
this.queue=new int[data.length+1]; Kpp_|2|@<
for(int i=0;i queue[++size]=data; ?ubro0F:
fixUp(size); 8Y?;x}
} n!(F, b
} ce(#2o&`
,?3G;-
private int size=0; %)n=x ne
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private int[] queue; I:.s_8mH}
\v/[6&|X0s
public int get() { g&.=2uP
return queue[1]; Xr{v~bf
} vv7I_nK?
F}zDfY\-
public void remove() { I_BJH'!t
SortUtil.swap(queue,1,size--); ~XIb\m9H
fixDown(1); ,0k;!YK
} f!"w5qC^
file://fixdown gFh*eCo
private void fixDown(int k) { +h$ 9\
int j; _-\#i
while ((j = k << 1) <= size) { 3CJwj
if (j < size %26amp;%26amp; queue[j] j++; KTv$
if (queue[k]>queue[j]) file://不用交换 -YE^zzh
break; ;Qq\DFe.w
SortUtil.swap(queue,j,k); ~5g~;f[4
k = j; `{Ul!
} [ 3HfQ
} ctUp=po
private void fixUp(int k) { wS*E(IAl
while (k > 1) { Y ay?=Y{
int j = k >> 1; Mfs?x a
if (queue[j]>queue[k]) N;gfbh]
break; ;\]@K6m/Ap
SortUtil.swap(queue,j,k); *`U~?q}
k = j; 0aAoV0fMDz
} 2?x4vI np;
} H#&00Q[
Xeajxcop#
} 4R*,VR.K
#b`ke/P
} fZ. ONq
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SortUtil： l^qI,M
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package org.rut.util.algorithm; M`>E|"<
1"g<0 W
import org.rut.util.algorithm.support.BubbleSort; >V~E]P%@
import org.rut.util.algorithm.support.HeapSort; ]?*wbxU0
import org.rut.util.algorithm.support.ImprovedMergeSort; r3Ykz%6
import org.rut.util.algorithm.support.ImprovedQuickSort; /o[w4d8
import org.rut.util.algorithm.support.InsertSort; Q;u pau
import org.rut.util.algorithm.support.MergeSort; HV.t6@\};
import org.rut.util.algorithm.support.QuickSort; ]-q;4.
import org.rut.util.algorithm.support.SelectionSort; #F#%`Rv1
import org.rut.util.algorithm.support.ShellSort; nK,w]{<wG!
hQi2U
/** =fbWz
* @author treeroot Dj+f]~
* @since 2006-2-2 rKn~qVls
* @version 1.0 YMgNzu
*/ JO;Uus{?
public class SortUtil { 6pzSp
public final static int INSERT = 1; s CRdtP
public final static int BUBBLE = 2; OH88n69
public final static int SELECTION = 3; xUvs:
public final static int SHELL = 4; 99S^f:t
public final static int QUICK = 5; dscgj5b1~
public final static int IMPROVED_QUICK = 6; P%6~&woF
public final static int MERGE = 7; <m m[S
public final static int IMPROVED_MERGE = 8; xmG<]WF>E
public final static int HEAP = 9; {FGj]*
""H?gsL[
public static void sort(int[] data) { hj:,S|
sort(data, IMPROVED_QUICK); #?E"x/$Y6
} 9FvFhY
private static String[] name={ g*Phv|kI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '7/)Ot(
}; y^k$Us
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private static Sort[] impl=new Sort[]{ Rv=YFo[B
new InsertSort(), Vj-h;rB0z
new BubbleSort(), Th%zn2R B
new SelectionSort(), >V937
new ShellSort(), yuVs YV@"
new QuickSort(), rUl+
new ImprovedQuickSort(), %*U'@r(A
new MergeSort(), -12U4h<e
new ImprovedMergeSort(), a}d@ T
new HeapSort() d1*<Ll9K
}; ebq4g387X
;*N5Y}?j'
public static String toString(int algorithm){ ),)lzN%!
return name[algorithm-1]; !W\+#ez
} 7 &\yj9
cR{#V1Z
public static void sort(int[] data, int algorithm) { mR~&)QBP.
impl[algorithm-1].sort(data); : +u]S2u{
} &L:!VL{I
GVz6-T~\>
public static interface Sort { FlQGgVN
public void sort(int[] data); @c#(.=
} 7P T{lT
*I+Q~4
public static void swap(int[] data, int i, int j) { b'g )
int temp = data; *R"/|Ka
data = data[j]; O<I-
data[j] = temp; lFkR=!?=
} H::bwn`Vc
} CAlCDfKW}