[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; *$#r%
} 1LPfn(
int i1=l; D<++6HN&#
int i2=mid+1; hD>:WJ
for(int cur=l;cur<=r;cur++){ 0^E!P>
if(i1==mid+1) ` V^#Sb
data[cur]=temp[i2++]; /=e[(5X|O
else if(i2>r) F|P2\SPL
data[cur]=temp[i1++]; 1v2wP2]|;
else if(temp[i1] data[cur]=temp[i1++]; #mkr]K8A4
else w,}}mC)\*
data[cur]=temp[i2++]; n"FOCcTIs
} g+k6pi*
} f6|3| +
iU%Gvf^?'5
} =l7LEkR
sM5 w~R>Y
改进后的归并排序: ^G2vA8%
r]HLO'<]
package org.rut.util.algorithm.support; !%s7I^f*
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import org.rut.util.algorithm.SortUtil; Qgx~'9
TJ;v}HSo
/** $\^]MxI
* @author treeroot V'mpl
* @since 2006-2-2 2{V|
* @version 1.0 e#nTp b
*/ 3&y u
public class ImprovedMergeSort implements SortUtil.Sort { 3@"VS_;?
--^D)n
private static final int THRESHOLD = 10; rXm!3E6JL
}?fa+FQGp
/* ~36c0 =
* (non-Javadoc) KFfwZkj{
* wj'iU&aca
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0x`:jz`
*/ ycE<7W
public void sort(int[] data) { @nT8[v
int[] temp=new int[data.length]; so8-e
mergeSort(data,temp,0,data.length-1); 23OVy^b
} aSF&^/j
6op\g].P
private void mergeSort(int[] data, int[] temp, int l, int r) { _b5iR<f
int i, j, k; bZG$ biq
int mid = (l + r) / 2; zcZw}
if (l == r) sQ)4kF&,
return; S~TJF}[k^6
if ((mid - l) >= THRESHOLD) Z^~6pH\
mergeSort(data, temp, l, mid); 3\WES!
else F 5JgR-P
insertSort(data, l, mid - l + 1); f:UN~z'yr
if ((r - mid) > THRESHOLD) @2$8o]et
mergeSort(data, temp, mid + 1, r); }`M6+.z3F
else 4xYo2X,B
insertSort(data, mid + 1, r - mid); <Ihn1?
<bjy<98LT
for (i = l; i <= mid; i++) { .N'UnKz
temp = data; Q`s(T
} * ;M?R?+
for (j = 1; j <= r - mid; j++) { )xK!i.
temp[r - j + 1] = data[j + mid]; [`b{eLCFX]
} VuBp$H(U
int a = temp[l]; mPD'"
int b = temp[r]; uf>w*[m5
for (i = l, j = r, k = l; k <= r; k++) { @'rO=(-b
if (a < b) { % (.PRRI
data[k] = temp[i++]; 3PEs$m9e
a = temp; *AA1e}R{B
} else { #rC/y0niH
data[k] = temp[j--]; \bsm#vY,
b = temp[j]; ibAA:I,d
} gU%GM
} 2?ednMoE
} wS^-o
v6n(<0:
/** T*ic?!
* @param data c"$_V[m
* @param l -)Vj08aP
* @param i s-ou;S3s
*/ A^Zs?<C-
private void insertSort(int[] data, int start, int len) { &p%ctg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K@,VR3y /
} WE"'3u^k
} ie,{C
} #Nd+X@j
} 2X]\:<[4
W!(Q_B
堆排序： xV6j6k
hf-S6PEsM
package org.rut.util.algorithm.support; ,]Ma,2
dkLR Q
import org.rut.util.algorithm.SortUtil; *,pqpD>
:h3JDQe:.
/** xVe!
* @author treeroot CP'-CQ\Q
* @since 2006-2-2 7.t$#fzi
* @version 1.0 wf4Q}l2,d
*/ dWUu3
public class HeapSort implements SortUtil.Sort{ Uoe?5Of(*
A^7!+1*K+
/* (non-Javadoc) 6{~I7!m"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f1{ckHAY55
*/ DIRCP=5
public void sort(int[] data) { <f6Oj`{f4
MaxHeap h=new MaxHeap(); O`=Uq0Vv
h.init(data); FdqUv%(Em
for(int i=0;i h.remove(); k?#6j1pn
System.arraycopy(h.queue,1,data,0,data.length); 40E[cGz$*
} neBkwXF!
<*+MBF
private static class MaxHeap{ ivq4/Y]-X
hMQaT-v
void init(int[] data){ 0>`69&;g|
this.queue=new int[data.length+1]; smU+:~
for(int i=0;i queue[++size]=data; z)B=<4r
fixUp(size); >gE_?%a[
} R[c_L=
} ;gyE5n-{
34=0.{qn
private int size=0; D4|_?O3|m
|3LMVN
private int[] queue; Q'VS]n
8\9EDgT
public int get() { 7,zARWB!?
return queue[1]; On^#x]
} }NXESZYoi
2~<0<^j/]
public void remove() { {V8Pn2mlo
SortUtil.swap(queue,1,size--); #L)rz u
fixDown(1); LcXMOT)s
} 'w2;oO
file://fixdown Z:_y,( 1Q
private void fixDown(int k) { ?zEF?LJoK
int j; (AYD@
while ((j = k << 1) <= size) { 4=Ey\Px
if (j < size %26amp;%26amp; queue[j] j++; 1|VJND
if (queue[k]>queue[j]) file://不用交换 NP8TF*5V
break; /HRaX!|E#
SortUtil.swap(queue,j,k); x_K%
k = j; ~#CCRUhM
} J (h>
} 1%,Z&@^j
private void fixUp(int k) { l_c?q"X
while (k > 1) { lu_Gr=#O
int j = k >> 1; 5o/rV.I
if (queue[j]>queue[k]) Jy_'(hG
break; d eg>m?Y
SortUtil.swap(queue,j,k); P]B#i1
k = j; Eg*3**gTO
} Z-@}~#E
} !UTJ) &
>$DqG$D
} `cpcO
ZAZCvN@5
} +$t%L
eXK`%'
SortUtil： 9K|lU:,
+b+sQ<w?.
package org.rut.util.algorithm; D;]%
7&4,',0VL
import org.rut.util.algorithm.support.BubbleSort; L|LTsRIq
import org.rut.util.algorithm.support.HeapSort; arZIe+KW
import org.rut.util.algorithm.support.ImprovedMergeSort; <Xx\F56zp
import org.rut.util.algorithm.support.ImprovedQuickSort; I8?[@kg5b'
import org.rut.util.algorithm.support.InsertSort; @nu/0+8h{
import org.rut.util.algorithm.support.MergeSort; TXcKuo=
import org.rut.util.algorithm.support.QuickSort; l'QR2r7&.
import org.rut.util.algorithm.support.SelectionSort; TeJ `sJ
import org.rut.util.algorithm.support.ShellSort; iC]lO
UD{/L"GG
/** OX4D'
* @author treeroot )*ckJK
* @since 2006-2-2 =]e^8;e9
* @version 1.0 +pvJ?"J
*/ Br5Io=/wg
public class SortUtil { !Yu-a!
public final static int INSERT = 1; 5H+k_U
public final static int BUBBLE = 2; k5D'RD
public final static int SELECTION = 3; sE6J:m(
public final static int SHELL = 4; \aIy68rH,
public final static int QUICK = 5; %%6('wi
public final static int IMPROVED_QUICK = 6; c'";36y
public final static int MERGE = 7; dH|^\IQ
public final static int IMPROVED_MERGE = 8; &F_rg,q&_
public final static int HEAP = 9; x[UO1% _o-
<q2nZI^
public static void sort(int[] data) { <R>z;2c
sort(data, IMPROVED_QUICK); 070IBAk}_
} *K'ej4"u
private static String[] name={ P*`xiTA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /Ph&:n\4
}; .E#Sm?gK
5Q`n6x|
private static Sort[] impl=new Sort[]{ (JW?azU
new InsertSort(), 1 ],, Ar5
new BubbleSort(), % VpBB
new SelectionSort(), nM-SDVFM
new ShellSort(), DWQQ615i
new QuickSort(), mndl~/
new ImprovedQuickSort(), l-}5@D[
new MergeSort(), RJwIN,&1.
new ImprovedMergeSort(), $3[\:+
new HeapSort() /v4S@SQ+
}; NxO^VUD
<0)ud)~u
public static String toString(int algorithm){ Ch"8cl;Fm
return name[algorithm-1]; 8? Wxd65)
} ]fo^43rn{
8G&+
public static void sort(int[] data, int algorithm) { 3]n@c?lw
impl[algorithm-1].sort(data); _`i%9Ad.4
} FK# E7 K
H~ n~5 sF"
public static interface Sort { D1~x
public void sort(int[] data); aGb. Lh9
} < iI6@X>
++DQS9b{
public static void swap(int[] data, int i, int j) { f~nt!$
int temp = data; zK4 8vo
data = data[j]; _/~ ,a
data[j] = temp; ,Bw)n,
} W#I:j: p
} ,M.!z@