[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; (lhbH]I
} DT #1*&-
int i1=l; 5Qp5JMK
int i2=mid+1; DJeP]
for(int cur=l;cur<=r;cur++){ ?op6_a-wm
if(i1==mid+1) W'\{8&:!
data[cur]=temp[i2++]; "v-\nAu
else if(i2>r) qoBm!|q
data[cur]=temp[i1++]; im^G{3z
else if(temp[i1] data[cur]=temp[i1++]; m :ROq
else br"p D-}
data[cur]=temp[i2++]; fbSl$jn.
} uXuMt a*Y
} o<e AZ
,cs`6Bd4
} i=%wZHc;
vJ$#m_aa
改进后的归并排序: `j088<?j
yzhr"5_
package org.rut.util.algorithm.support; or/Y"\-!
y&\ J
import org.rut.util.algorithm.SortUtil; I<*U^e
M'D;2qo
/** c"%XE#D
* @author treeroot 2.Ym
* @since 2006-2-2 hq/k}Y
* @version 1.0 6hSj)
*/ F;jl0)fBR=
public class ImprovedMergeSort implements SortUtil.Sort { n{pS+u z
~130"WQ;
private static final int THRESHOLD = 10; ([s}bD.9
F]3iL^v
/* MJ>9[hs
* (non-Javadoc) De[!^/f;T
* y";{k+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pi? q<p%
*/ ;$(a+?
public void sort(int[] data) { )`Tny]M
int[] temp=new int[data.length]; .:c^G[CQ^9
mergeSort(data,temp,0,data.length-1); 7|3Z+#|T
} ):eX*
+Ij>\;vM"
private void mergeSort(int[] data, int[] temp, int l, int r) { NA[yT
int i, j, k; J0w[vrs&]
int mid = (l + r) / 2; 3A]Y=gfa
if (l == r) \`r5tQr
return; BCF-lrZ&
if ((mid - l) >= THRESHOLD) "8VCXD
mergeSort(data, temp, l, mid); x=yBB;&
else fk`y}#7M
insertSort(data, l, mid - l + 1); dc_^
if ((r - mid) > THRESHOLD) M cE$=Vv
mergeSort(data, temp, mid + 1, r); k( 1rp|qf
else ="3Hc=1?R
insertSort(data, mid + 1, r - mid); y[S5
UDV,co
for (i = l; i <= mid; i++) { nCEt*~t9VE
temp = data; FJo N"X
} t/HMJ
for (j = 1; j <= r - mid; j++) { Uf{cUY,j_
temp[r - j + 1] = data[j + mid]; QvK/31*QG
} V{;Mh u`+
int a = temp[l]; |~k=:sSz{
int b = temp[r]; gm9e-QIHK
for (i = l, j = r, k = l; k <= r; k++) { V;ZyAp
if (a < b) { ~my\{q
data[k] = temp[i++]; !Pt|Hk dr
a = temp; mkTf}[O
} else { |4pE"6A
data[k] = temp[j--]; Fs<kMT
b = temp[j]; -DhF> 4f
} k}l5v)m
} e{.2*>pH
} "m):"
{ dwm>a
/** 5NbI Vz
* @param data e-H:;m5R
* @param l 25*/]iu
* @param i S #%'Vrp
*/ cC1nC76[
private void insertSort(int[] data, int start, int len) { Qs8iu`'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5 |{0|mP
} 3D+>NB
} lh3%2Dq$
} ^%|{>Mz;c
} c, \TL ]
V:)k@W?P
堆排序： lQ!ukl)
%Y:'5\^lC
package org.rut.util.algorithm.support; >Be PE(k
8 wQV^G
import org.rut.util.algorithm.SortUtil; [oKc<o7)~"
k uU,7<o
/** :}FMauHh
* @author treeroot $jo}?Y+
* @since 2006-2-2 oHB51< }
* @version 1.0 `;*%5WD%
*/ yPn5l/pDDr
public class HeapSort implements SortUtil.Sort{ u2y?WcMv
"T?%4^:g
/* (non-Javadoc) cIK-VmO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7EOn4I2@[
*/ q0jzng
public void sort(int[] data) { C0zE<fl
MaxHeap h=new MaxHeap(); 1C^6'9o
h.init(data); 'CjcOI s
for(int i=0;i h.remove(); ='T<jV`evu
System.arraycopy(h.queue,1,data,0,data.length); bw9a@X
} ;$&&tEh)
ik_Ll|
private static class MaxHeap{ 724E(?>J
^4x(a&
void init(int[] data){ *bDuRr?v9
this.queue=new int[data.length+1]; #?YQ&o~gZ
for(int i=0;i queue[++size]=data; 9yajtR
fixUp(size); DoX#+ 07u4
} =et=X_3-
} ]zmY]5
0^*4LM|z
private int size=0; U:~O^
!FZb3U@
private int[] queue; ;B o2$
YMj z,N
public int get() { ueDG1)
return queue[1]; k]lM%
} $d{{><
;VeC(^-eh6
public void remove() { ,xuqQ;JX
SortUtil.swap(queue,1,size--); uXxyw7\W
fixDown(1); ^F5[2<O/!
} aRdk^|}
file://fixdown #,Fk
private void fixDown(int k) { ^, q\S
int j; L9Z:>i?
while ((j = k << 1) <= size) { L qMH]W
if (j < size %26amp;%26amp; queue[j] j++; ]MfT5#(6h
if (queue[k]>queue[j]) file://不用交换 PZKKbg2S
break; ox{)O/aj
SortUtil.swap(queue,j,k); H5S>|"`e`e
k = j; Q*ZqY
} Z9cch-u~
} @ T'!;)
private void fixUp(int k) { Dh BUMDoB
while (k > 1) { .8uJ%'$)
int j = k >> 1; `fu(
if (queue[j]>queue[k]) BOrfKtG\
break; ~zi6wu(3
SortUtil.swap(queue,j,k); b4Zkj2L
k = j; hdQ[=PH)
} 5.0BaVwi
} =PP]LDlJs
0yfmQ=,X
} &7,Kv0j}
CSRcTxH
} z,87;4-
}N#jA yp!
SortUtil： j0>S)Q
3P\#moJ
package org.rut.util.algorithm; p )etl5
ba1zu|@w
import org.rut.util.algorithm.support.BubbleSort; 0V{-5-.
import org.rut.util.algorithm.support.HeapSort; V?kJYf(<
import org.rut.util.algorithm.support.ImprovedMergeSort; D*|h c
import org.rut.util.algorithm.support.ImprovedQuickSort; Mou>|U1e"
import org.rut.util.algorithm.support.InsertSort; |#^u%#'[2
import org.rut.util.algorithm.support.MergeSort; "KcSOjvJ
import org.rut.util.algorithm.support.QuickSort; ,oT?-PC$z
import org.rut.util.algorithm.support.SelectionSort; LUna stA^
import org.rut.util.algorithm.support.ShellSort; Vx;f/CH3!
Bbz#$M!:
/** U O YM
* @author treeroot lfOF]Kiqr
* @since 2006-2-2 5]:fkx
* @version 1.0 %E3|b6k\
*/ <,(6*b
public class SortUtil { X<Rh-1$8F
public final static int INSERT = 1; 4};iL)
public final static int BUBBLE = 2; 4C/
public final static int SELECTION = 3; 1u:OzyJy
public final static int SHELL = 4; # 5v 2`|)
public final static int QUICK = 5; >(ku*
public final static int IMPROVED_QUICK = 6; sl}bNzT#
public final static int MERGE = 7; Gn<s>3E
public final static int IMPROVED_MERGE = 8; *^bqpW2$q
public final static int HEAP = 9; R;.zS^LL
sEt5!&
public static void sort(int[] data) { y>'^<xk
sort(data, IMPROVED_QUICK); OthQ)&pqX
} J Xo_l
private static String[] name={ $2A%y14
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HTao)`.
}; ?5K.#>{
rV<yM$IA
private static Sort[] impl=new Sort[]{ >:4}OylhM
new InsertSort(), &[`p qX
new BubbleSort(), eh2w7@7Q
new SelectionSort(), WEFYV=I\
new ShellSort(), H^_[nL
new QuickSort(), @aN<nd`q)
new ImprovedQuickSort(), n7i;^=9mM
new MergeSort(), 'uGn1|Pvy
new ImprovedMergeSort(), %L.,:mtq)
new HeapSort() )?^0<l#s
}; )TnxsFC
0$b)@
public static String toString(int algorithm){ {-2I^Ym 5i
return name[algorithm-1]; ~=aD*v<3d
} mg[=~&J^
PEW^Vl-6q
public static void sort(int[] data, int algorithm) { W&q]bi@C
impl[algorithm-1].sort(data); |Kky+*
} UBs'3M
m]R< :_
public static interface Sort { hC4##pAa
public void sort(int[] data); rbS67--]
} (s4w0z
%*>=L$A
public static void swap(int[] data, int i, int j) { !e*Q2H+
int temp = data; 2>l4$G0
data = data[j]; dX-{75o5P
data[j] = temp; |GM?4'2M.
} G&)A7WaC
} H{ p