[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; kdiM5l70
} f_OQ./`
int i1=l; \doUTr R
int i2=mid+1; G[PtkPSJ
for(int cur=l;cur<=r;cur++){ #\{l"-
if(i1==mid+1) 38B2|x
data[cur]=temp[i2++]; 4> K42m
else if(i2>r) =jN.1}
data[cur]=temp[i1++]; b=C*W,Q_#
else if(temp[i1] data[cur]=temp[i1++]; zpn9,,~u
else ,>a&"V^k
data[cur]=temp[i2++]; fgTg7 m
} ^e,.
} RNk\.}m
kt#fMd$
} u[;\y|75
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改进后的归并排序: 0D.Mke )
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package org.rut.util.algorithm.support; ;?Tbnn Wn
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import org.rut.util.algorithm.SortUtil; %6 zBSje
~7w"nIs<c
/** ,_ H:J.ik
* @author treeroot mthA4sz
* @since 2006-2-2 n&4N[Qlv,
* @version 1.0 CZwXTHe
*/ XX TL..
public class ImprovedMergeSort implements SortUtil.Sort { K!%+0)A
#lo6c;*m5
private static final int THRESHOLD = 10; KfEx"94
Y1\}5k{>
/* &&8x%Pml
* (non-Javadoc) !qQl@jO
* y-b%T|p9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1s&zMWC
*/ L<cx:Vz
public void sort(int[] data) { k9R4Y\8P
int[] temp=new int[data.length]; NN{?z!
mergeSort(data,temp,0,data.length-1); tKuwpT1Qc
} "S]0
KZY}%il!`
private void mergeSort(int[] data, int[] temp, int l, int r) { bHnT6Icom
int i, j, k; $99n&t$Y
int mid = (l + r) / 2; `{h*/Q
if (l == r) NR6#g,+7
return; m])y.T
if ((mid - l) >= THRESHOLD) iq8<ov
mergeSort(data, temp, l, mid); ;4\2.*s
else ub0.J#j@
insertSort(data, l, mid - l + 1); ?zMHP#i
if ((r - mid) > THRESHOLD) <NY^M!
mergeSort(data, temp, mid + 1, r); H2 {+)
else u~:y\/Y6
insertSort(data, mid + 1, r - mid); 05#1w#i
PdFKs+Z`
for (i = l; i <= mid; i++) { F,F4nw<W
temp = data; 2,oKVm+
} ?=7cF
for (j = 1; j <= r - mid; j++) { J4C.+![!Ah
temp[r - j + 1] = data[j + mid]; W(Fv l
} NA`SyKtg_
int a = temp[l]; Q8tL[>Xt
int b = temp[r]; >>)b'c
for (i = l, j = r, k = l; k <= r; k++) { O63<AY@
if (a < b) { 2wg5#i
data[k] = temp[i++]; )EuvRLo{S7
a = temp; HWrO"b*tO
} else { {]!mrAjD
data[k] = temp[j--]; i#/Jr=
b = temp[j]; {lDd.Fn
} 2]jn '4
} Sv#XIMw{,
} XEp{VC@=
[!uG1GJ>
/** U$.@]F4&
* @param data oulVg];
* @param l gCS<iBT(7
* @param i DJ k/{Z:
*/ P )"m0Lu<
private void insertSort(int[] data, int start, int len) { b5I I/Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [({nj`
} %N6A+5H
} 2#]#sZmk
} ~$cV:O7
} Lx1FpHo
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堆排序： %@aSe2B
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package org.rut.util.algorithm.support; .V/Rfq
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import org.rut.util.algorithm.SortUtil; wu!59pL
r'r%w#=`t
/** :{v#'U/^
* @author treeroot 4jMFr,
* @since 2006-2-2 6:5I26
* @version 1.0 UgNu`$m+
*/ {X+3;&@
public class HeapSort implements SortUtil.Sort{ iRbT/cc{
.t-4o<7 3
/* (non-Javadoc) VBGuC c/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Q@j
*/ FaSf7D`C
public void sort(int[] data) { $y&E(J
MaxHeap h=new MaxHeap(); PI)+Jr%L
h.init(data); (O?.)jEW(.
for(int i=0;i h.remove(); d#Y^>"|$.
System.arraycopy(h.queue,1,data,0,data.length); P>C~ i:4n
} z"L/G
qp}Cqi
private static class MaxHeap{ O2E/jj
Tya1/w4
void init(int[] data){ Jy:Qlx`
this.queue=new int[data.length+1]; gQg"j)
for(int i=0;i queue[++size]=data; py!|\00}
fixUp(size); t;Sb/3
} NjScc%@y
} e7Z32P0ls
Q7\w+ANf0
private int size=0; ;>yxNGV`
S(I{NL}=$
private int[] queue; ]EBxl=C}D
.-c4wm}
public int get() { =E4LRKn
return queue[1]; 7 :xfPx
} "Mn6U-
H>IMf/%5N-
public void remove() { ay ;S4c/_
SortUtil.swap(queue,1,size--); u@UMP@"#
fixDown(1); c /HHy,
} /GN<\_o=q
file://fixdown SI-qC
private void fixDown(int k) { )e+>w=t
int j; ^z IW+:
while ((j = k << 1) <= size) { F=e8IUr
if (j < size %26amp;%26amp; queue[j] j++; 2!m/
if (queue[k]>queue[j]) file://不用交换 IGQaDFr
break; 4#xDgxg\f
SortUtil.swap(queue,j,k); T|eu
k = j; 9igiZmM
} Q800y??&J
} nu[ML
private void fixUp(int k) { M*, -zGr
while (k > 1) { !qh]6%l
int j = k >> 1; ,{u yG:
if (queue[j]>queue[k]) <I\/n<*
break; Uw. `7b>B
SortUtil.swap(queue,j,k); wPd3F.<$
k = j; QUc= &5 %
} <4si/=
} rdP[<Y9
4{U T!WIi
} ?%-DfCS
uM IIYS
} feDlH[$
t ;;U}
SortUtil： |O|V-f{l
|!3DPA(_
package org.rut.util.algorithm; 4iazNl#
w!-gJmX>
import org.rut.util.algorithm.support.BubbleSort; O|{d[eX
import org.rut.util.algorithm.support.HeapSort; F3@phu${
import org.rut.util.algorithm.support.ImprovedMergeSort; 5h=}j
import org.rut.util.algorithm.support.ImprovedQuickSort; .+3g*Dv{&
import org.rut.util.algorithm.support.InsertSort; WUe{vV#S'0
import org.rut.util.algorithm.support.MergeSort; -hGk?_Nqa/
import org.rut.util.algorithm.support.QuickSort; 3tIVXtUCUk
import org.rut.util.algorithm.support.SelectionSort; 30#s aGV
import org.rut.util.algorithm.support.ShellSort; /tx]5`#@7]
TOB-aAO
/** I(L,8n5
* @author treeroot ?r "{}%
* @since 2006-2-2 |^"1{7)
* @version 1.0 )Xz,j9GzJS
*/ rxvx
public class SortUtil { MDZ640-Y
public final static int INSERT = 1; KK/tu+"
public final static int BUBBLE = 2; _ @NL;w:!
public final static int SELECTION = 3; kzQ+j8.,U
public final static int SHELL = 4; X; \+<LE
public final static int QUICK = 5; &ZlVWK~v
public final static int IMPROVED_QUICK = 6; =vCY?I$P
public final static int MERGE = 7; zII|9y
public final static int IMPROVED_MERGE = 8; )hn6sXo+
public final static int HEAP = 9; u^+7hkk
DZ'P@f)]
public static void sort(int[] data) { {0Yf]FQb-a
sort(data, IMPROVED_QUICK); ,Bi.1 %$
} dC3o9
private static String[] name={ Z*]9E^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vAF "n
}; ,F8Yn5h
K( c\wr\6
private static Sort[] impl=new Sort[]{ ,i?nWlh+
new InsertSort(), b7?uq9
new BubbleSort(), r"3=44St
new SelectionSort(), Pe_W;q.
new ShellSort(), p?%y82E
new QuickSort(), \R9(x]nZ%
new ImprovedQuickSort(), z1 |TC
new MergeSort(), v!-/&}W)1
new ImprovedMergeSort(), .LnGL]/
new HeapSort() q.^;!f1
}; G#q@v(_b
TTX5EDCrC
public static String toString(int algorithm){ i4Q@K,$
return name[algorithm-1]; O'p9u@kc
} I#Y22&G1
E1aHKjLQ
public static void sort(int[] data, int algorithm) { O_muD\
impl[algorithm-1].sort(data); a8e6H30Sm
} T9E+\D
#_ ;lf1x!
public static interface Sort { "yy5F>0Wt
public void sort(int[] data); T?CdZc.
} ~OYiq}g
x*\Y)9Vgy
public static void swap(int[] data, int i, int j) { }#RakV4
int temp = data; ,GhS[VJjR
data = data[j]; ,hm\
data[j] = temp; X6w6%fzOH>
} `iFmrC<
} <y('hI'