[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; Hl(W'>*oL
} nwfu@h0G
int i1=l; %qeNC\6N
int i2=mid+1; WnOYU9;%
for(int cur=l;cur<=r;cur++){ :?z@T[-
if(i1==mid+1) bcuUej:
data[cur]=temp[i2++]; $}S0LZ_H
else if(i2>r) G[>CBh5
data[cur]=temp[i1++]; J~`!@!
else if(temp[i1] data[cur]=temp[i1++]; D_ej%QtB@
else v;?W|kJ.u
data[cur]=temp[i2++]; uuh._H}-
} ?kV_!2U)'K
} v5?)J91
lF46W
} /?Y4C)G
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改进后的归并排序: NaQ~iY?
Dh#5-Kf%
package org.rut.util.algorithm.support; wpQp1){%Q
M1 o@v0
import org.rut.util.algorithm.SortUtil; :~s*yznf
-cn`D2RP
/** B2_fCSlg
* @author treeroot ?l @=}WN
* @since 2006-2-2 `)w=@9B)"
* @version 1.0 Abmi=]\bx
*/ U_Mag(^-
public class ImprovedMergeSort implements SortUtil.Sort { *YQXxIIq
`W1TqA
private static final int THRESHOLD = 10; OQg}E@LZ
YReI|{O$c
/* w_QWTD0
* (non-Javadoc) ,PKUgL}w
* QGErQ +l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) # M3d=
*/ D6yE/QeK4
public void sort(int[] data) { H#nJWe_9A
int[] temp=new int[data.length]; ||7x51-yj
mergeSort(data,temp,0,data.length-1); c5KciTD^
} j#p3<V S4
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private void mergeSort(int[] data, int[] temp, int l, int r) { .ubZ
int i, j, k; *9F{+)A
int mid = (l + r) / 2; K^b'<} $|p
if (l == r) *Kq;xM6Ck
return; &f)pU>Di
if ((mid - l) >= THRESHOLD) j/ARTaO1]"
mergeSort(data, temp, l, mid); 4VsttT
else sVnpO$
insertSort(data, l, mid - l + 1); tgeXX1Eq!
if ((r - mid) > THRESHOLD) v806f8
mergeSort(data, temp, mid + 1, r); ):L0{W{
else 'auYmX
insertSort(data, mid + 1, r - mid); AuBBSk8($
o> 1+m
for (i = l; i <= mid; i++) { k&u5`F
temp = data; H:16aaMn(
} LTb#1JC
for (j = 1; j <= r - mid; j++) { |NFDrm
temp[r - j + 1] = data[j + mid]; W<~u0AyO 3
} Qk.[#
int a = temp[l]; a72L%oJ
int b = temp[r]; X:(t,g*7
for (i = l, j = r, k = l; k <= r; k++) { 2jxh7\zE
if (a < b) { u*7>0o|H:
data[k] = temp[i++]; rPifiLl A>
a = temp; ZJjm r,1
} else { p%\&M bA
data[k] = temp[j--]; eQ=6< ^KZ
b = temp[j]; %=vU Z4
} j#H&~f
} 97}l`z;Z
} "Z-YZ>2
0v3 8LBH)
/** @Ps1.
* @param data 'H1k
* @param l 0A75)T=lQ
* @param i =cx_3gCr{
*/ ng[LSB*57Y
private void insertSort(int[] data, int start, int len) { S^5Qhv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0(A&m ,
} vC^n_
} lBG"COu
} ]L\]Ll;
} m9$lOk4/
1#vi]CX
堆排序： :l {%H^;1
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package org.rut.util.algorithm.support; p,mKgL63
W3B:)<f
import org.rut.util.algorithm.SortUtil; *adwCiB
6eK7Jv\K
/** 9u_D@A"aC`
* @author treeroot Qf@ha
* @since 2006-2-2 +,4u1`c|$
* @version 1.0 >Qs{LEsLb
*/ }I~)o!N%7
public class HeapSort implements SortUtil.Sort{ Es1T{<G|w
_6\"U5*Y
/* (non-Javadoc) rJCu6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zm=|#f
*/ 'RIx}vPf
public void sort(int[] data) { wG&rkg";#
MaxHeap h=new MaxHeap(); )H*BTfmt
h.init(data); 7@!3.u1B
for(int i=0;i h.remove(); 7$JE+gL/7
System.arraycopy(h.queue,1,data,0,data.length); 6LzN#g
} 8qv>C)~~`
VO7&<Y}{x
private static class MaxHeap{ \|R\pS}4
qo:t"x^
void init(int[] data){ !/EN
this.queue=new int[data.length+1]; <e$%m(]
for(int i=0;i queue[++size]=data; VP6_}9:9
fixUp(size); -nGLmMvd
} TA!6|)BUW
} `s_k+ g
$8NM[R.8^4
private int size=0; m/aA q8
6JE_rAab
private int[] queue; wl%I(Cw{]
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public int get() { lN[#+n
return queue[1]; )xYGJq4
} 8:"s3xaO3
vH>s2\V"
public void remove() { k$w#:Sx
SortUtil.swap(queue,1,size--); !+3nlG4cw
fixDown(1); mC!^`y)
} C&RZdh,$
file://fixdown 4siq
private void fixDown(int k) { CWS]821;
int j; XOPiwrg%p
while ((j = k << 1) <= size) { )W!\D/C+
if (j < size %26amp;%26amp; queue[j] j++; +Sg+% 8T
if (queue[k]>queue[j]) file://不用交换 kwrM3nq
break; RtF!(gd
SortUtil.swap(queue,j,k); Lv:;}
k = j; \kC'y9k
} NsL!AAN[V
} QzV%m0
private void fixUp(int k) { (kSb74*g
while (k > 1) { P+Sgbtc
int j = k >> 1; >xIb|Yp)&
if (queue[j]>queue[k]) #e&LyYx4
break; a*!9RQ
SortUtil.swap(queue,j,k); eY3<LVAX
k = j; 4'H)h'#C
} \}; 4rm}V
} \r-v]]_<d
O]Q8&(
} G(#EW+
vW5>{
} oC(.u?
]{=qdgJ
SortUtil： <Mf(2`T
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package org.rut.util.algorithm; ?cgb3^R'
29f4[V X
import org.rut.util.algorithm.support.BubbleSort; /^,/o
import org.rut.util.algorithm.support.HeapSort; 4JGU`L:~
import org.rut.util.algorithm.support.ImprovedMergeSort; )D ':bWP
import org.rut.util.algorithm.support.ImprovedQuickSort; h~k+!\
import org.rut.util.algorithm.support.InsertSort; Ol*|J
import org.rut.util.algorithm.support.MergeSort; -@/!u9l
import org.rut.util.algorithm.support.QuickSort; V#V<Kz
import org.rut.util.algorithm.support.SelectionSort; EP8R[Q0_"
import org.rut.util.algorithm.support.ShellSort; kTo{W]9]
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/** [ejl #'*5
* @author treeroot i/F].Sag
* @since 2006-2-2 I =nvL
* @version 1.0 XF99h&;9
*/ Z+Ppd=||,
public class SortUtil { uar[D|DcD"
public final static int INSERT = 1; -FQS5Zb.!
public final static int BUBBLE = 2; 4,:)%KB"V
public final static int SELECTION = 3; \w2X.2b.F
public final static int SHELL = 4; {e83 A/{
public final static int QUICK = 5; 4m6%HV8{}[
public final static int IMPROVED_QUICK = 6; ' y_2"
public final static int MERGE = 7; p\r V6+
public final static int IMPROVED_MERGE = 8; W";Po)YC
public final static int HEAP = 9; WRN}>]NgQ
GD#W=O
public static void sort(int[] data) { `qa>6`\
sort(data, IMPROVED_QUICK); {0Ej*%
} )!d_Td\-
private static String[] name={ hr/|Fn+kA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | @p
}; pe-%`1iC0>
XI;F=r}'
private static Sort[] impl=new Sort[]{ RzqU`<//
new InsertSort(), =}[m_rp&
new BubbleSort(), wO"ezQ
new SelectionSort(), eLk:">kj
new ShellSort(), }~! D]/B
new QuickSort(), vf['$um
new ImprovedQuickSort(), K2-nP2Go?
new MergeSort(), ". wG~H
new ImprovedMergeSort(), TXfG@4~kC
new HeapSort() 9,0}}3J
}; 5!7vD|6
}xytV5a^
public static String toString(int algorithm){ 61`tQFx,
return name[algorithm-1]; I9kBe}g3
} a>Xq
SW=%>XKkh
public static void sort(int[] data, int algorithm) { kI/%|L%6D
impl[algorithm-1].sort(data); FO?I}G22
} <u2iXH5w
bE2{^5iG
public static interface Sort { A9M/n^61
public void sort(int[] data); RJLhR_t7n
} jN2Xoh9
a}7P:e*u
public static void swap(int[] data, int i, int j) { r }Nq"s<
int temp = data; wI2fCq(a0
data = data[j]; `}*jjnr"
data[j] = temp; 1DM$FG_Z-
} ^%Fn|U\u
} mcSZ1d~,(