[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; ct`j7[
} rP|~d}+I
int i1=l; ( RO-~-
int i2=mid+1; 70Jx[3vr
for(int cur=l;cur<=r;cur++){ & %A&&XT9
if(i1==mid+1) !mHMFwvS
data[cur]=temp[i2++]; eu={6/O
else if(i2>r) `Y O(C<r-
data[cur]=temp[i1++]; Pm&hv*D
else if(temp[i1] data[cur]=temp[i1++]; :e1kpQ
else sPX&XqWx
data[cur]=temp[i2++]; ,.9k)\/V
} BX\/Am11
} s|IY t^
ZP{<f~;
} +`,;tz=?
`>)[UG!:|
改进后的归并排序: HxSq&j*F
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package org.rut.util.algorithm.support; ];xDXQd
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import org.rut.util.algorithm.SortUtil; 1r$*8|p
bd]9kRq1K
/** .DNPL5[v
* @author treeroot !]5}N^X
* @since 2006-2-2 @<NuuYQ&
* @version 1.0 ;/:Sx/#s
*/ 5`Q j<
public class ImprovedMergeSort implements SortUtil.Sort { t:MSV?
v5>A1\
private static final int THRESHOLD = 10; [?%q,>F
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/* is }>+&_
* (non-Javadoc) WP2=1"X63
* IjGPiC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pHT]2e#
*/ sYjhQN=Y*
public void sort(int[] data) { jr,N+K(@T
int[] temp=new int[data.length]; .G.WPVE
mergeSort(data,temp,0,data.length-1); '2GnAws^
} ^/_Yk.w
_%q~K (::
private void mergeSort(int[] data, int[] temp, int l, int r) { vJLGy]
int i, j, k; KL3Z(
int mid = (l + r) / 2; G54J'*Z
if (l == r) gg>QXui
return; ~)^'5^
if ((mid - l) >= THRESHOLD) ;z.L^V0
mergeSort(data, temp, l, mid); oNZ_7tU
else dvZH~mF
insertSort(data, l, mid - l + 1); (:aU"5M
if ((r - mid) > THRESHOLD) dgL>7X=7
mergeSort(data, temp, mid + 1, r); D/?Ec\t
else NMe{1RM
insertSort(data, mid + 1, r - mid); %xN${4)6
W:,Wex^9n
for (i = l; i <= mid; i++) { ]}dQ~lOE
temp = data; k,[*h-{8
} >))CXGE
for (j = 1; j <= r - mid; j++) { t;BUZE_!0c
temp[r - j + 1] = data[j + mid]; }x?F53I)
} T]ls&cW5
int a = temp[l]; 4vEP\E3u<j
int b = temp[r]; CHsg2S
for (i = l, j = r, k = l; k <= r; k++) { >!6|yk`GJ
if (a < b) { U@M3.[jw
data[k] = temp[i++]; Hs*["zFc
a = temp; In?=$_p
} else { ];Z6=9n
data[k] = temp[j--]; ?u|@,tQ[
b = temp[j]; _Z23lF9
} XEgJ7h_
} ]QhTxrF"
} 6|zhqb|s
5BJE
/** -~mgct5
* @param data $#q`Y+;L2
* @param l TWzLJ63*
* @param i 1h&`mqY)L.
*/ IdQ./@?
private void insertSort(int[] data, int start, int len) { X/yq<_ g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p&h?p\IF
} z Fo11;*D
} Zge(UhZ
} H+4j.eVzZU
} G 5;6q
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堆排序： 3''Sx8p
q0iJy@?A
package org.rut.util.algorithm.support; maXg(Lu
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import org.rut.util.algorithm.SortUtil; D7;9D*o\
6RnzT d
/** 64<;6*
* @author treeroot 8NWo)y49H
* @since 2006-2-2 pFvu,Q"
* @version 1.0 X H-_tvB
*/ $VuXr=f}
public class HeapSort implements SortUtil.Sort{ ){*+s RBW
z3Q&O$5\
/* (non-Javadoc) .\n` 4A1z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $-iEcxsi
*/ {'5"i?>s0>
public void sort(int[] data) { d9K8[Q5^3
MaxHeap h=new MaxHeap(); f8Iddm#
h.init(data); zaqX};b
for(int i=0;i h.remove(); Mfj82rHg
System.arraycopy(h.queue,1,data,0,data.length); ,%M[$S'
} A*EOn1hN
[={mCGU
private static class MaxHeap{ FTf#"'O
v $Iw?y
void init(int[] data){ #z|Q $
this.queue=new int[data.length+1]; s/E|Z1pg3
for(int i=0;i queue[++size]=data; Xw-[Sf]p
fixUp(size); Y{p$%
} q,vWu(.
} uM-,}7f7
XBQt:7[<
private int size=0; Yc:%2KZ"
^7-zwl(>?N
private int[] queue; CL|/I:%0
c$O8Rhx
public int get() { ,o&C"sb
return queue[1]; X@rA2);6
} *l+#<5x
^"WVE["
public void remove() { 0!T`.UMI
SortUtil.swap(queue,1,size--); eTiTS*`u
fixDown(1); [3Pp NCY
} [nTI\17iA
file://fixdown $ik*!om5
private void fixDown(int k) { P{TJ$
int j; cHs3:F~~
while ((j = k << 1) <= size) { 8xAV[i
if (j < size %26amp;%26amp; queue[j] j++; `(e:H
if (queue[k]>queue[j]) file://不用交换 /yOx=V
break; /wV|;D^ )
SortUtil.swap(queue,j,k); 3Q=^&o0fl
k = j; l":W@R
} Ri.tA
} #BC"bY
private void fixUp(int k) { 'nmA!s
while (k > 1) { |$RNY``J
int j = k >> 1; M]x>u@JH
if (queue[j]>queue[k]) x:|Y)Dn\
break; $x0SWJ \G
SortUtil.swap(queue,j,k); IH]9%d)
k = j; YX\vk/[|
} <ql,@*Y
} kT%wt1T4
v}G^+-?
} g'8Y5x[
*g/klK
} =[6^NR(
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SortUtil： ;]{ee?Q^ld
dY*q[N/pO
package org.rut.util.algorithm; Lc3&\q e
8-q^.<9
import org.rut.util.algorithm.support.BubbleSort; Harg<l
import org.rut.util.algorithm.support.HeapSort; }E'0vf/
import org.rut.util.algorithm.support.ImprovedMergeSort; uDf<D.+5Ze
import org.rut.util.algorithm.support.ImprovedQuickSort; Nk|cU;?+
import org.rut.util.algorithm.support.InsertSort; j(;^XO Y#
import org.rut.util.algorithm.support.MergeSort; ,,H"?VO
import org.rut.util.algorithm.support.QuickSort; :|S zD4Ag
import org.rut.util.algorithm.support.SelectionSort; A#{63_H
import org.rut.util.algorithm.support.ShellSort; 8>Cr6m
K\Ea\b[
/** p_FM 2K7!
* @author treeroot JK k0f9)
* @since 2006-2-2 7]ieBUfS
* @version 1.0 0> f!S` *
*/ h9vcN#22D
public class SortUtil { K7 e~%mY
public final static int INSERT = 1; [a=exK
public final static int BUBBLE = 2; iI3:<j l
public final static int SELECTION = 3; J2UQq7-y
public final static int SHELL = 4; q7R]!zk
public final static int QUICK = 5; gFDnt
public final static int IMPROVED_QUICK = 6; ]%Q!%uTh
public final static int MERGE = 7; /jbAf]"F;
public final static int IMPROVED_MERGE = 8; ?t#wK}d.
public final static int HEAP = 9; ?#xl3Z ;I
!l:GrT8J
public static void sort(int[] data) { ;nY#/%f
sort(data, IMPROVED_QUICK); =2Y;)wrF
} Shn,JmR
private static String[] name={ ><V*`{bD9)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WK~H]w
}; O%bbyR2
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private static Sort[] impl=new Sort[]{ 9T,/R1N8
new InsertSort(), .tBlGMcN
new BubbleSort(), Cux(v8=n
new SelectionSort(), 8{ zX=
new ShellSort(), `Q]N]mK
new QuickSort(), dC11kqqj
new ImprovedQuickSort(), 7Cgi&
new MergeSort(), aZfMeW
new ImprovedMergeSort(), u v%Q5O4
new HeapSort() c_lHj#A(l
}; )>volP
lj4Fg*/Yn
public static String toString(int algorithm){ $=aO*i
return name[algorithm-1]; @6u/)>rI
} 7|rH9Bc{U
tne_]+
public static void sort(int[] data, int algorithm) { sZ;|NAx)
impl[algorithm-1].sort(data); D6 B-#u!M
} E$8JrL
mxc)Wm<4
public static interface Sort { Q7%4`_$!
public void sort(int[] data); b 2gng}
} h Yu6PWK
Z;0~f<e%
public static void swap(int[] data, int i, int j) { X{9^$/XsJ
int temp = data; q z)2a2C
data = data[j]; a#oROb-*~
data[j] = temp; Fr%#
} rpNb.
} .`or^`X3