[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; Q(gc(bJV
} S]#xG+$<
int i1=l; oMNgyAp^
int i2=mid+1; Nu]&?
for(int cur=l;cur<=r;cur++){ X_tc\}I]
if(i1==mid+1) \f6@B:?y
data[cur]=temp[i2++]; t<%S_J\
else if(i2>r) q5D_bm7,3
data[cur]=temp[i1++]; `mt.=d
else if(temp[i1] data[cur]=temp[i1++]; njoU0f1`
else ) }.<lSw
data[cur]=temp[i2++]; =iZj&B X
} ,k=1'7d
} yCt,-mz!z
dYP-QUM$7
} ~lSdWUk>
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改进后的归并排序: miCW(mbO8
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package org.rut.util.algorithm.support; ;3 |Z}P
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import org.rut.util.algorithm.SortUtil; l{u2W$8
3\~ RWoB0u
/** ud}B#{6
* @author treeroot 1_Ag:>#X
* @since 2006-2-2 Z6Kw'3
* @version 1.0 E/[<} ./
*/ y;1 'hP&
public class ImprovedMergeSort implements SortUtil.Sort { n@ rphJb
oI/jGyY;
private static final int THRESHOLD = 10; LEJ8 .z6$
9"%ot=)
/* ;uK">L[u'
* (non-Javadoc) nGvWlx
* `EjPy>kM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fy!-1N9|l
*/ gXzp$#
public void sort(int[] data) { aLKvl~s;m
int[] temp=new int[data.length]; e.<y-b?
mergeSort(data,temp,0,data.length-1); 6gSo>F4=
} $: %U`46%s
O5;$cP:
private void mergeSort(int[] data, int[] temp, int l, int r) { luYa+E0
int i, j, k; LBs:O*;
int mid = (l + r) / 2; | D?lF
if (l == r) a`:ag~op@&
return; icnc5G
if ((mid - l) >= THRESHOLD) NDt +m
mergeSort(data, temp, l, mid); TGe)%jZ
else fQ@k$W\
insertSort(data, l, mid - l + 1); Xgs 31#K
if ((r - mid) > THRESHOLD) AnUOv2
mergeSort(data, temp, mid + 1, r); Z\@m_/g
else I,pI2
insertSort(data, mid + 1, r - mid); r'C(+E (
hj8S#
for (i = l; i <= mid; i++) { /!//i^
temp = data; 7j <:hF~
} k'hJ@6eKS
for (j = 1; j <= r - mid; j++) { Gx.iZOOH/
temp[r - j + 1] = data[j + mid]; !VF.=\iH/
} g/2eY$6Z
int a = temp[l]; :Jz@`s1n
int b = temp[r]; AzwG_XgM)
for (i = l, j = r, k = l; k <= r; k++) { ML|O2e
if (a < b) { [kjmEMF9i
data[k] = temp[i++]; SW^/\cJ^
a = temp; 5NT?A,r"
} else { HRPNZ!B
data[k] = temp[j--]; h9B^U?<wT
b = temp[j]; "AAzBWd/
} qxR7;/@j)
} :W++`f&
} in/ITy-
0VOj,)K=
/** T<\!7RnLc
* @param data G31??L:<
* @param l _ zh>q4M
* @param i Xw|t.0
*/ ~gjREl,+D#
private void insertSort(int[] data, int start, int len) { H /kSFf{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +Je(]b@
} 5,pKv
} :Ur=}@Dj
} ]nEZQ+F
} ?\eq!bu
v@8=u4
堆排序： n<. T6
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package org.rut.util.algorithm.support; 7i,Z c]
kCq]#e~wq
import org.rut.util.algorithm.SortUtil; &vy/Vd
)Apg
/** yLo{^4a.
* @author treeroot ##6_kcL:6G
* @since 2006-2-2 7xmyjy%c
* @version 1.0 :n4X>YL)
*/ :4ndU:.L
public class HeapSort implements SortUtil.Sort{ 3e<FlH{
FzDZ<dJ
/* (non-Javadoc) |#r[{2sS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TvEN0RV2
*/ (Nky?*
public void sort(int[] data) { #\Q{?F!4
MaxHeap h=new MaxHeap(); %/86}DCfE?
h.init(data); nmLn]U=
for(int i=0;i h.remove(); 5K~kzRL$r
System.arraycopy(h.queue,1,data,0,data.length); ;U +;NsCH
} q66+x)
LOD'iiH6
private static class MaxHeap{ kg>Ymo.
| Q Y_ci
void init(int[] data){ 3Mnm2*\
this.queue=new int[data.length+1]; 1lxsj{>U
for(int i=0;i queue[++size]=data; tPT\uD#t
fixUp(size); GQNs:oRJ'
} ^Ms)T3dM
} m]1=o7
S<hj6A
private int size=0; rb/m;8v>
0]F'k8yLN
private int[] queue; nbnbG0r:
o4)^U t+
public int get() { wW7W+,{o
return queue[1]; pP4i0mO{Dv
} N@M(Iw
sGf\!w
public void remove() { _L6WbRu|
SortUtil.swap(queue,1,size--); MNE{mV(
fixDown(1); ^8mF0K&
} X[frL)k]
file://fixdown blwdcdh
private void fixDown(int k) { o8:K6y
int j; c !$ 8>
while ((j = k << 1) <= size) { -XVC,.Ly
if (j < size %26amp;%26amp; queue[j] j++; hSgfp
if (queue[k]>queue[j]) file://不用交换 {[~ !6&2(k
break; +fgF &.
SortUtil.swap(queue,j,k); X7I"WC1ncz
k = j; <p48?+K9
} ~zklrBn&
} +\`D1d@
private void fixUp(int k) { t|gEMDGa3
while (k > 1) { p0KkPE">p4
int j = k >> 1; 2V}tDN7c
if (queue[j]>queue[k]) q;T3bxp+
break; |g5B==KI
SortUtil.swap(queue,j,k); ;;zKHS
k = j; U&fOsx?"
} U/ncD F%C
} 6]i"lqb
8{5Y%InL
} HevS}L
vG(Gs=.U
} iOB]72dh
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SortUtil： SR9Cl
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package org.rut.util.algorithm; q16RPqfT
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import org.rut.util.algorithm.support.BubbleSort; `.z;.&x
import org.rut.util.algorithm.support.HeapSort; rpsq.n
import org.rut.util.algorithm.support.ImprovedMergeSort; EDR;" G(N
import org.rut.util.algorithm.support.ImprovedQuickSort; tJ>OZ
import org.rut.util.algorithm.support.InsertSort; v;S7i>\
import org.rut.util.algorithm.support.MergeSort; {:&t;5qz^
import org.rut.util.algorithm.support.QuickSort; JM5w`=
import org.rut.util.algorithm.support.SelectionSort; p @@TOS
import org.rut.util.algorithm.support.ShellSort; G:FP9
%nJ^0X_]
/** t[B\'f!
* @author treeroot pYo]lO
* @since 2006-2-2 ~X^L3=!vf
* @version 1.0 *rO#UE2
*/ V#?GDe}[
public class SortUtil { r;`6ML[5Vx
public final static int INSERT = 1; ;d1\2H
public final static int BUBBLE = 2; D6,rb 9
public final static int SELECTION = 3; 4@PH5z
public final static int SHELL = 4; bk E4{P"
public final static int QUICK = 5; }2Y:#{m
public final static int IMPROVED_QUICK = 6; &pS <4
public final static int MERGE = 7; uBLI!N-G
public final static int IMPROVED_MERGE = 8; nB?$W4
public final static int HEAP = 9; B\a-Q,Wf
4,m aA
public static void sort(int[] data) { <4z |"(
sort(data, IMPROVED_QUICK); B$aA=+<S
} :E/]Bjq$;
private static String[] name={ ^[}^+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UY*3b<F}
}; k%V#{t.
Z~^)B8
private static Sort[] impl=new Sort[]{ .g.v
new InsertSort(), 'rJkxU{
new BubbleSort(), A4.Q\0
new SelectionSort(), dxkq*
new ShellSort(), jnvi_Rodm
new QuickSort(), =Mb!&qq
new ImprovedQuickSort(), ]}2+yK
new MergeSort(), XVjs0/5b
new ImprovedMergeSort(), *.wX9g9\
new HeapSort() K &m`1f
}; umrfA
Bk&ry)`gD
public static String toString(int algorithm){ dEU+\NY
return name[algorithm-1]; !(PAUWS@
} NF <|3|
8 /1 sy.R
public static void sort(int[] data, int algorithm) { Zr,:i MPZ
impl[algorithm-1].sort(data); G2Eke;
} 59:Xu%Hp
'Z#8]YP`
public static interface Sort { z{U2K'
public void sort(int[] data); (]0JI1 d
} 8^CdE*a
8KRm>-H)
public static void swap(int[] data, int i, int j) { {)]5o| Hx
int temp = data; GGcNaW'
data = data[j]; 6@?4z Rkz
data[j] = temp; O,"4HZG
} Q?KWiFA}'
} FU9q|!2Y