[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; &tCtCk%{j
} EG4bFmcs
int i1=l; !U:s.^{
int i2=mid+1; <z2mNq
for(int cur=l;cur<=r;cur++){ GK?R76d
if(i1==mid+1) vfJk? (
data[cur]=temp[i2++]; f*{;\n(.t
else if(i2>r) vqMk)htIz
data[cur]=temp[i1++]; :iB%JY Ad
else if(temp[i1] data[cur]=temp[i1++]; :b*`hWnQ
else &xroms"S=
data[cur]=temp[i2++]; myOX:K*
} ZM`P~N1?)g
} h\*rv5\M
~PW}sN6ppG
} vx}Z
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改进后的归并排序: Z !25xqNCd
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package org.rut.util.algorithm.support; ANQa2swM
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import org.rut.util.algorithm.SortUtil; qbq<O %g=
CU1\C*
/** tr9Y1vxo{
* @author treeroot <`j[;>O
* @since 2006-2-2 emY5xZ@N
* @version 1.0 GL =XiBt
*/ m2q;^o:J
public class ImprovedMergeSort implements SortUtil.Sort { Am%a4{b
dN\P&"`
private static final int THRESHOLD = 10; 6+nMH +[
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/* #C;zS9(]B
* (non-Javadoc) q\'P1~
* G q:4rG|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K1/gJ9+(\
*/ |8qK%n f}
public void sort(int[] data) { v7<S F
int[] temp=new int[data.length]; h9BD ^j
mergeSort(data,temp,0,data.length-1); pG F5aF7T
} "ex~LB
RTgA[O4J
private void mergeSort(int[] data, int[] temp, int l, int r) { lc3S|4
int i, j, k; Fwx~ ~"I
int mid = (l + r) / 2; 5 2@udp
if (l == r) (\mulj
return; @Tfwh/UN
if ((mid - l) >= THRESHOLD) e8ULf~I
mergeSort(data, temp, l, mid); 4&oXy,8LC
else vJj:9KcP>h
insertSort(data, l, mid - l + 1); *pb:9JKi
if ((r - mid) > THRESHOLD) 3:~l2KIP4
mergeSort(data, temp, mid + 1, r); 3$$5Mk(&
else "wF ?Hamz
insertSort(data, mid + 1, r - mid); x?f0Hk+
i{|lsd(+
for (i = l; i <= mid; i++) { ~X~xE]1o|U
temp = data; OC?Zw@
} '"xL}8HX}
for (j = 1; j <= r - mid; j++) { 3b|7[7}&
temp[r - j + 1] = data[j + mid]; L_Y9+ e
} jiwpDB&[
int a = temp[l]; RP~vB#}
int b = temp[r]; 1!>bhH}{D
for (i = l, j = r, k = l; k <= r; k++) { /63W\
if (a < b) { nIV.9#~&
data[k] = temp[i++]; 5Cc6, ]
a = temp; ~']&.
} else { } g3HoFC
data[k] = temp[j--]; d7W%zg\T
b = temp[j]; J0?$v6S
} G}=`VYK
} Wj&<"Z6'm(
} _&; ZmNNhc
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/** :SQDqG
* @param data A$9q!Ui#d
* @param l <S\;k@f
* @param i JdaFY+f:
*/ ",~ b2]ym
private void insertSort(int[] data, int start, int len) { K,x$c %
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PoYr:=S?
} sTKab :
} xNC* ]8d
} 5wzQ?07T_
} ojN`#%X
#2Ac
堆排序： s~'9Hv9
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package org.rut.util.algorithm.support; }x:\69$
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import org.rut.util.algorithm.SortUtil; }Q`/K;yq
q$MHCq;
/** H,(F1+~d
* @author treeroot -`-ACWeNV
* @since 2006-2-2 kjx>
* @version 1.0 D",A$(lG
*/ fkW3~b
public class HeapSort implements SortUtil.Sort{ utq.r_
rQ=xcn[A
/* (non-Javadoc) hA@zoIoe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'GrRuT<
*/ l!\1,J:}Z
public void sort(int[] data) { uPFRh~ (b
MaxHeap h=new MaxHeap(); _mw13jcN]
h.init(data); !-KCFMvT
for(int i=0;i h.remove(); 2y^Uk,g
System.arraycopy(h.queue,1,data,0,data.length); $b4*/vMr
} .H Fc9^.*
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private static class MaxHeap{ %'$f ?y
MO[c0n%
void init(int[] data){ 7Aqn[1{_O
this.queue=new int[data.length+1]; )r=9]0=
for(int i=0;i queue[++size]=data; -y%QRO(
fixUp(size); ot^q}fRX
} 6e*%\2UA
} kl| g
jz|VF,l
private int size=0; HB%K|&!+
6j_ 678
private int[] queue; 9p5= _
M/*Bh,M`
public int get() { 64SW
return queue[1]; Ih; aBS
} |0lLl^zp
^,LtEwd~Y
public void remove() { |ribWCv0
SortUtil.swap(queue,1,size--); B4@fY
fixDown(1); \Ps5H5Qk;
} -=5EbNPwG
file://fixdown 2_wvC
private void fixDown(int k) { JT}.F!q6E
int j; emA.{cVr!
while ((j = k << 1) <= size) { 36nyu_h:R
if (j < size %26amp;%26amp; queue[j] j++; {aoMJJq
if (queue[k]>queue[j]) file://不用交换 l(#1mY5!q8
break; 0',[J
SortUtil.swap(queue,j,k); (nq^\ZdF
k = j; @$oZ|ZkZ
} @' d6iYk_
} w=|py>%
private void fixUp(int k) { JwB"\&'1ZS
while (k > 1) { vmLpmxS
int j = k >> 1; /p,{?~0mj
if (queue[j]>queue[k]) 7_KXD#
break; (#If1[L
SortUtil.swap(queue,j,k); 5?w.rcN[j
k = j; |U EC
} Ia#"/`||
} d+0^u(gc!8
+mLD/gK`
} #~S>K3(
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} |kseKZ3
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SortUtil： x}|+sS,g
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package org.rut.util.algorithm; Z%OW5]q
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import org.rut.util.algorithm.support.BubbleSort; 7E\g &R.
import org.rut.util.algorithm.support.HeapSort; uFo/s&6K
import org.rut.util.algorithm.support.ImprovedMergeSort; 2T?TM! \Q
import org.rut.util.algorithm.support.ImprovedQuickSort; z&F5mp@
import org.rut.util.algorithm.support.InsertSort; 7h`^N5H.q
import org.rut.util.algorithm.support.MergeSort; nA+F
import org.rut.util.algorithm.support.QuickSort; [~)x<=H8{
import org.rut.util.algorithm.support.SelectionSort; \7 Gz\=\LR
import org.rut.util.algorithm.support.ShellSort; 8#l+{`$z
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/** x[x(y{&~
* @author treeroot c0ZaFJ
* @since 2006-2-2 lE'wfUb
* @version 1.0 n}OU Y
*/ j^nu|
public class SortUtil { `[Sl1saZ$S
public final static int INSERT = 1; e2wvc/gG6
public final static int BUBBLE = 2; h/?6=D{
public final static int SELECTION = 3; vxVOcO9<
public final static int SHELL = 4; 9yL6W'B!
public final static int QUICK = 5; q:]Q% IC^
public final static int IMPROVED_QUICK = 6; qrE0H
public final static int MERGE = 7; :c:V%0Yji
public final static int IMPROVED_MERGE = 8; (NaK3_
public final static int HEAP = 9; I_>`hTiR
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public static void sort(int[] data) { CA*~2|
sort(data, IMPROVED_QUICK); :)4*^a/lC
} iRt*A6`m+
private static String[] name={ Y0RgJn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EO:avH.*0
}; ix*muVBj.
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private static Sort[] impl=new Sort[]{ 6bL~6-h%)
new InsertSort(), W.[BPR
new BubbleSort(), &,MFB
new SelectionSort(), -_>.f(1
new ShellSort(), T6HU*(
new QuickSort(), Nfb`YU=
new ImprovedQuickSort(), qqvF-mDN
new MergeSort(), iLtc HpN
new ImprovedMergeSort(), <\aU"_D
new HeapSort() '[0YIn
}; 9g]M4*?C9P
bEI!Ja
public static String toString(int algorithm){ :Ss3ck*=
return name[algorithm-1]; 8x{Hg9
} %5Rq1$D
fM^<+o@
public static void sort(int[] data, int algorithm) { W[|[;{
impl[algorithm-1].sort(data); u-.L^!k
} ~L'nzquF
/gw Cwyo
public static interface Sort { GV6mzD@<
public void sort(int[] data); m =k%,J_
} I%xn,u
&t_h'JX&
public static void swap(int[] data, int i, int j) { o^GC=Aca`
int temp = data; SdI1}&
data = data[j]; k?j Fh6%
data[j] = temp; Pz`hX$
} aU(tu2
} r0btC@Hxy