[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; ^"<x4e9+j
} 4C/G &w&
int i1=l; 4sRM"w;
int i2=mid+1; fV@[S
for(int cur=l;cur<=r;cur++){ ?VlGTMaS+
if(i1==mid+1) ~UJ.A<>Fh
data[cur]=temp[i2++]; HjIIhl?UY
else if(i2>r) ,OWk[0/
data[cur]=temp[i1++]; `;Ho<26
else if(temp[i1] data[cur]=temp[i1++]; yts@cd`$
else C$q};7b1N
data[cur]=temp[i2++]; 3~{I/ft
} XLC9B3Jt
} )9^)t
Z#.1p'3qm1
} Mgr?D
"\i H/
改进后的归并排序: r4pX47H
d(|q&b:
package org.rut.util.algorithm.support; " i:[|7
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import org.rut.util.algorithm.SortUtil; NB1KsvD{
1Y87_o'd
/** r1}^\C
* @author treeroot "MU-&**
* @since 2006-2-2 <l(n)|H1P
* @version 1.0 MA,*$BgZ
*/ ltfKqY-
public class ImprovedMergeSort implements SortUtil.Sort { <3!Al,!ej@
)by7[I0v
private static final int THRESHOLD = 10; vhPlH0
yUj`vu2
/* s3eS` rK-
* (non-Javadoc) UAPd["`)y
* (P`=9+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :h5G|^
*/ ?TeozhUY
public void sort(int[] data) { b3EGtC}^
int[] temp=new int[data.length]; 'y\Je7
mergeSort(data,temp,0,data.length-1); 23P&n(.
} +l^tT&s;f
jB8Q% {%
private void mergeSort(int[] data, int[] temp, int l, int r) { ele@xl
int i, j, k; <Xl#}6II
int mid = (l + r) / 2; %ggf|\-e
if (l == r) Asv]2> x
return; XHekz6_
if ((mid - l) >= THRESHOLD) ?<${?L>
mergeSort(data, temp, l, mid); )i}j\";>L
else OL>)SJj5
insertSort(data, l, mid - l + 1); Qn7T{ BW
if ((r - mid) > THRESHOLD) '{cSWa| #
mergeSort(data, temp, mid + 1, r); Rjq Xz6
else ss[`*89
insertSort(data, mid + 1, r - mid); wn.~Dx
][wb4$2
for (i = l; i <= mid; i++) { ]R_R`X?
temp = data; n9xP8<w8
} Iz1x|EQ
for (j = 1; j <= r - mid; j++) { [a04( 2g
temp[r - j + 1] = data[j + mid]; i+h*<){X
} iI{L>
int a = temp[l]; <mQXS87
int b = temp[r]; LP6p
for (i = l, j = r, k = l; k <= r; k++) { l3sF/zkH
if (a < b) { SK lvZ
data[k] = temp[i++]; _8a;5hS
a = temp; qS#G7~ur>y
} else { Hl,{4%]
data[k] = temp[j--]; >=[uLY[aK
b = temp[j]; eJ99W=
} hE|P|0U,n
} .Q%Hi7JMi
} ,c4HicRJ#
~f h
/** g3z/yj
* @param data y6nP=g|')>
* @param l 0n{.96r0R
* @param i RNi%6A1
*/ \IE![=p\w
private void insertSort(int[] data, int start, int len) { -NXxxK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !HvA5'|:}
} pR$(V4>
} D`T;j[SsS#
} 6N#hN)/
} U?#wWbE1
P9/ (f$=
堆排序： |Y>Jf~SN
u#,8bw?1
package org.rut.util.algorithm.support; fZ$b8
{4D`VfX_
import org.rut.util.algorithm.SortUtil; SXk.7bMV6
;cXw;$&D
/** Bn7uKa{P
* @author treeroot J?9jD:x
* @since 2006-2-2 XVqOiv)
* @version 1.0 :~otzI4%!
*/ LqbI/AQ)
public class HeapSort implements SortUtil.Sort{ vkIIuNdDlx
&"^F;z/
/* (non-Javadoc) Ca|egQv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E+aePoU
*/ S"cTi[9
public void sort(int[] data) { m\56BP-AM
MaxHeap h=new MaxHeap(); 5dePpFD5
h.init(data); ~w?02FU
for(int i=0;i h.remove(); VBX)xQazU
System.arraycopy(h.queue,1,data,0,data.length); 0~bUW V
} Wef%f]u
C|V7ZL>W
private static class MaxHeap{ ;Z]Wj9iY
ij ?7MP
void init(int[] data){ 'XK 'T\m
this.queue=new int[data.length+1]; g&s. 0+
for(int i=0;i queue[++size]=data; N1$u@P{
fixUp(size); ,^:{!?v
} n93q8U6m/U
} ?{ N,&d
IrMHAM5K
private int size=0; >Uw:cq
)0VL$A
private int[] queue; 'z ?Hv
x4WCAqi/2
public int get() { cUY-
return queue[1]; iFd !ED
} n9B5D:.G
fpR|+`k
public void remove() { PVIOe}N
SortUtil.swap(queue,1,size--); /65YHXg,
fixDown(1); <T}^:2G|
} .9bi%=hP
file://fixdown Y4rxnXGw
private void fixDown(int k) { vGkemJ^/
int j; w:5?ofC
while ((j = k << 1) <= size) { aJ'Fn
if (j < size %26amp;%26amp; queue[j] j++; 32wtN8kx
if (queue[k]>queue[j]) file://不用交换 #AJW-+1g.=
break; =I# pXL
SortUtil.swap(queue,j,k); YnEyL2SuU
k = j; NiZfaC6V
} RlOy,/-<
} 2:38CdkYp
private void fixUp(int k) { '(.5!7?Qc
while (k > 1) { h.edb6
int j = k >> 1; 0V:H/qu8>
if (queue[j]>queue[k]) |'h(S|
break; L/i'6(="
SortUtil.swap(queue,j,k); z@,pT"rb
k = j; 1}d F,e
} 7kLurv
} )ros-dp`
Nx 42k|8
} g88k@<Y
jZA1fV
} tm~9XFQ<
0>28o.
SortUtil： 0Y8gUpe3P6
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package org.rut.util.algorithm; zG9FO/@av
cXq9k!I%
import org.rut.util.algorithm.support.BubbleSort; L^JU{\C
import org.rut.util.algorithm.support.HeapSort; 0z>IYw|UB
import org.rut.util.algorithm.support.ImprovedMergeSort; `=(<!nXJx
import org.rut.util.algorithm.support.ImprovedQuickSort; C m:AU;
import org.rut.util.algorithm.support.InsertSort; bBi>BP=
import org.rut.util.algorithm.support.MergeSort; %p 6Ms
import org.rut.util.algorithm.support.QuickSort; }b456J
import org.rut.util.algorithm.support.SelectionSort; %3`*)cp@
import org.rut.util.algorithm.support.ShellSort; t/[2{'R4
k8s)PN
/** Cog}a
* @author treeroot o<nM-"yWb
* @since 2006-2-2 o@)Fy51DD
* @version 1.0 Ue}1(2.v
*/ 1S?~c25=h
public class SortUtil { QRju9x
public final static int INSERT = 1; `y>m >j
public final static int BUBBLE = 2; u`XRgtI{g?
public final static int SELECTION = 3; 5iw\F!op:
public final static int SHELL = 4; ;>PHkJQ
public final static int QUICK = 5; ntIR#fB
public final static int IMPROVED_QUICK = 6; /dCsZA
public final static int MERGE = 7; ~cm4e>o
public final static int IMPROVED_MERGE = 8; F$UL.`X _/
public final static int HEAP = 9; nvR%Ub x
WO>,=^zPJ
public static void sort(int[] data) { gt8dFcm|s
sort(data, IMPROVED_QUICK); f#l9rV"@g
} ^&;,n.X5Z
private static String[] name={ [A~?V.G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #._JB-,'
}; _WS8I>
q]4h#?.-1v
private static Sort[] impl=new Sort[]{ n.l#(`($4
new InsertSort(), Uh.swBC n
new BubbleSort(), Qb {[xmc
new SelectionSort(), G8}owszT
new ShellSort(), - +a,Ej
new QuickSort(), iQO4IT
new ImprovedQuickSort(), "~VKUvDu
new MergeSort(), T={!/y+
new ImprovedMergeSort(), Tgpu9V6
new HeapSort() >~,~X9
}; AJ\gDjj<
Y2VfJ}%Q
public static String toString(int algorithm){ Tf#Op v)
return name[algorithm-1]; ./I?|ih
} u0W6u} 4;
#H6YI3 `G
public static void sort(int[] data, int algorithm) { )xVf3l pQ
impl[algorithm-1].sort(data); lW"0fZ_x'E
} ~C{:G;Iy0
VP!4Nob
public static interface Sort { ,#XXwm ^I
public void sort(int[] data); >$ZhhM/} J
} Tv#d>ZSD
ZY<RNwu
public static void swap(int[] data, int i, int j) { jTS8 qu
int temp = data; k;cIEEdZD
data = data[j]; iY>P7Uvvz
data[j] = temp; >)D=PvGlmp
} ?$`kT..j,u
} \dQc!)&C9