[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; =~% B}T
} [EDw0e
int i1=l; SxYX`NQ
int i2=mid+1; iq '3.-xYr
for(int cur=l;cur<=r;cur++){ O&=?,zLO[
if(i1==mid+1) y(B~)T~e@
data[cur]=temp[i2++]; s%Q pb{
else if(i2>r) +pJ;}+
data[cur]=temp[i1++]; $Xw .iN]g
else if(temp[i1] data[cur]=temp[i1++]; ]BU,*YaB
else <`sVu
data[cur]=temp[i2++]; jYet!l
} P.P3/,
} `!HGM>
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} ,ijgqEN
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改进后的归并排序: P@:#NU[
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package org.rut.util.algorithm.support; \BaN?u)a
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import org.rut.util.algorithm.SortUtil; ho2o/>Ef3
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/** iLn)Z0<\o
* @author treeroot SC`.VCfc.
* @since 2006-2-2 2"C'Au
* @version 1.0 Xvm.Un<N
*/ 0ANqEQX
public class ImprovedMergeSort implements SortUtil.Sort { 'MPt K
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private static final int THRESHOLD = 10; k/O|ia6
Qv,|*bf
/* dC_L~ }=
* (non-Javadoc) |cJyP9}n
* @D-l_[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mi9A%ZmP
*/ *@lNL=%R
public void sort(int[] data) { ZebXcT ,41
int[] temp=new int[data.length]; ',`iQt!Lx
mergeSort(data,temp,0,data.length-1); s d>&6R^
} gQgG_&xkC
9zEO$<e o
private void mergeSort(int[] data, int[] temp, int l, int r) { U;:>vi3p
int i, j, k; +q"d=
int mid = (l + r) / 2; V{@<Z8sW#
if (l == r) 9M:wUYHT
return; C 7YZ;{t
if ((mid - l) >= THRESHOLD) \i}n1Qd
mergeSort(data, temp, l, mid); P*T'R
else bS<lB!
insertSort(data, l, mid - l + 1); 2BBGJE
if ((r - mid) > THRESHOLD) wt[MzpRP
mergeSort(data, temp, mid + 1, r); rv1kIc5Za<
else &4sUi K"
insertSort(data, mid + 1, r - mid); y. @7aT5
.JZoZ.FAb
for (i = l; i <= mid; i++) { "2)<'4q5)
temp = data; BHOxwW{
} cfMj^*I
for (j = 1; j <= r - mid; j++) { ^.&uYF&
temp[r - j + 1] = data[j + mid]; Hu|NS{Ke-
} nM34zVy
int a = temp[l]; n>)CCf@H
int b = temp[r]; U_m<W$"HF
for (i = l, j = r, k = l; k <= r; k++) { Pon 2!$
if (a < b) { 1]aM)},
data[k] = temp[i++]; 4~hd{8
a = temp; LpeQx\
} else { I1BVqIt1i
data[k] = temp[j--]; FF6[qSV
b = temp[j]; oqB(l[%z2
} mMjY I1F
} [MdVgJ9'
} *oL?R2#7
}RYr)
/** ;RB]awE
* @param data >B U0B
* @param l g+t-<D"L5
* @param i kjfZ*V=-
*/ ]Vo;ZY_\
private void insertSort(int[] data, int start, int len) { '}e_8FS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c^><^LGb
} E#v}//
} AIR,XlD
} 3ox%1x NA
} 9Iq[@v
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堆排序： 8s-y+M@.
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package org.rut.util.algorithm.support; bdZ[`uMD
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import org.rut.util.algorithm.SortUtil; *9y)B|P^
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/** KPSFy<
* @author treeroot Z,)4(#b =
* @since 2006-2-2 ;e415T
* @version 1.0 @X+m,u
*/ ?1*Ka
public class HeapSort implements SortUtil.Sort{ kfr' P u
U>w#`Sy[
/* (non-Javadoc) 'i;1n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FkY}6
*/ _v bCC7Bf8
public void sort(int[] data) { T\I}s"d
MaxHeap h=new MaxHeap(); jj_z#6{
h.init(data); OB`(,m#
for(int i=0;i h.remove(); H )hO/1m
System.arraycopy(h.queue,1,data,0,data.length); #%O|P&rA
} r*HbglB
`-fWNHs
private static class MaxHeap{ N;4bEcWjp
pFgpAxl
void init(int[] data){ w=:o//~6j
this.queue=new int[data.length+1]; |a4cER.'2^
for(int i=0;i queue[++size]=data; *o.f<OwOz
fixUp(size); V[ju7\>$Z
} p[R4!if2
} })W9=xO~
q\s"B.(G"
private int size=0; 5;'(^z-bL
%jk7JDvl
private int[] queue; M.fAFL
Z,zkm{9*
public int get() { @~k4,dJ
return queue[1]; '&hz*yk
} yN[aBYJx,M
?M!Mb-C[
public void remove() { p3r("\Za,
SortUtil.swap(queue,1,size--); dUN{@a\R0
fixDown(1); b S-o86u
} }`KK
file://fixdown fF6bEJl3
private void fixDown(int k) { mi[t1cN)=
int j; QN47+)cVt"
while ((j = k << 1) <= size) { fg$#ZCi
if (j < size %26amp;%26amp; queue[j] j++; .3 >"qv
if (queue[k]>queue[j]) file://不用交换 m)AF9#aT2
break; @k=UB&?I
SortUtil.swap(queue,j,k); Q$+6f,m#W
k = j; '8J!(+
} #[f]-c(!
} hL4T7`
private void fixUp(int k) { I~T
while (k > 1) { 4)"S/u
int j = k >> 1; Pi+pQFz5
if (queue[j]>queue[k]) Tp46K\}Uf
break; i<0_sxfUD
SortUtil.swap(queue,j,k); &F- \t5X=i
k = j; X)e#=w!fi3
} P~ : N
} KH$|wv
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} x~Y{ {
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} s$%t2UaV
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SortUtil： }y%c.
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package org.rut.util.algorithm; K| dI'TnW
l~]D|92
import org.rut.util.algorithm.support.BubbleSort; eFh7#~m
import org.rut.util.algorithm.support.HeapSort; p}oGhO&=
import org.rut.util.algorithm.support.ImprovedMergeSort; r<$o [,W
import org.rut.util.algorithm.support.ImprovedQuickSort; WNY:HH
import org.rut.util.algorithm.support.InsertSort; nb<e<>L
import org.rut.util.algorithm.support.MergeSort; nU4to
import org.rut.util.algorithm.support.QuickSort; Rk,'ujc
import org.rut.util.algorithm.support.SelectionSort; xa.tH)R
import org.rut.util.algorithm.support.ShellSort; hkb&]XWi[
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/** hK,a8%KnFA
* @author treeroot MaPOmS8?
* @since 2006-2-2 WBD?|Ss
* @version 1.0 ?3lAogB
*/ N4#D&5I",
public class SortUtil { 5(gWK{R)*
public final static int INSERT = 1; I8a3:)
public final static int BUBBLE = 2; k#bG&BF
public final static int SELECTION = 3; ]1FLG*sB
public final static int SHELL = 4; "OwK-
public final static int QUICK = 5; nY7gST
public final static int IMPROVED_QUICK = 6; )=#e*1!b
public final static int MERGE = 7; +OqEe[Wk#
public final static int IMPROVED_MERGE = 8; Gx %=&O
public final static int HEAP = 9; GE`1j'^-
[GPCd@
public static void sort(int[] data) { U shIQh
sort(data, IMPROVED_QUICK); G^N@r:RS
} 6DU~6c=)
private static String[] name={ *Y?oAVkz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #}Yrxf
}; 9dw* ++
k3H0$1
private static Sort[] impl=new Sort[]{ "={*0P
new InsertSort(), 8\"Gs z
new BubbleSort(), +%v1X&_\
new SelectionSort(), _Dd>e=v
new ShellSort(), <#J5.I 1
new QuickSort(), 5JhvYsf3_
new ImprovedQuickSort(), <}:` Y"
new MergeSort(), CIz0Gjtx6m
new ImprovedMergeSort(), `!t-$i
new HeapSort() 1 _Oc1RM
}; aW*k,\:e
4e/!BGkAS
public static String toString(int algorithm){ d&CpaOSu
return name[algorithm-1]; PxgJ7d
} ]/kpEx
A+!,{G
public static void sort(int[] data, int algorithm) { 3rB0H
impl[algorithm-1].sort(data); /q+;!EM
} l 9 wO x
qC{JsX`~
public static interface Sort { FLs$
public void sort(int[] data); En1LGi4#
} P woiX#vz
BGBHA"5fz
public static void swap(int[] data, int i, int j) { v+"4YIN
int temp = data; vue^bn
data = data[j]; GyWa=KW.u
data[j] = temp; m)} 01N4
} &}[P{53sr
} u*v<dsGQ