[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; 8j%hxAV$
} Sh2;^6d
int i1=l; .>bvI1
int i2=mid+1; eq(Xzh
for(int cur=l;cur<=r;cur++){ 7\p<k/TS
if(i1==mid+1) itmQH\9 8
data[cur]=temp[i2++]; L.1pO2zPe
else if(i2>r) RiNKUk{-
data[cur]=temp[i1++]; Kk t9M\
else if(temp[i1] data[cur]=temp[i1++]; fsVQZ$h73
else )Og,VXEB
data[cur]=temp[i2++]; i~04P
} 6:o?@%
} DGllJ_/Z
? W`?F
} 5qW*/
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改进后的归并排序: U3zwC5}BN
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package org.rut.util.algorithm.support; ;}=[( eqA
V6{P41_
import org.rut.util.algorithm.SortUtil; oztfr<cUH
ND|!U#wMNV
/** ,'69RL?-Wg
* @author treeroot V/jEMJNks
* @since 2006-2-2 wZV/]jmlEt
* @version 1.0 hiN6]jL|O
*/ xo46L\
public class ImprovedMergeSort implements SortUtil.Sort { e2?7>?
,:!dqonn
private static final int THRESHOLD = 10; k_c8\::p#
BEv>?T 0
/* :"aCl~cy9g
* (non-Javadoc) ~+GMn[h
* fEl,jA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j+c<0,Kj
*/ ^|(w)Sy
public void sort(int[] data) { 8R6!SB
int[] temp=new int[data.length]; ,\FJVS;NeJ
mergeSort(data,temp,0,data.length-1); =N9a!ii|
} mt+IB4`
]B<Hrnn
private void mergeSort(int[] data, int[] temp, int l, int r) { +##b}?S%
int i, j, k; <E(#;F^y
int mid = (l + r) / 2; }lk_Oe1
if (l == r) L.[ H
return; *\Y \$w
if ((mid - l) >= THRESHOLD) >HUU`= SC
mergeSort(data, temp, l, mid); }wh)I]]U
else "(hhb>V1Wl
insertSort(data, l, mid - l + 1); oXc!JZ^
if ((r - mid) > THRESHOLD) $f-f0t'
mergeSort(data, temp, mid + 1, r); T'cahkSw'O
else &sp7YkaW
insertSort(data, mid + 1, r - mid); l)glT]G3+
?Mg&e/^
for (i = l; i <= mid; i++) { @LS*WJ< w-
temp = data; af61!?K
} @N,EoSb :
for (j = 1; j <= r - mid; j++) { gc 14%
temp[r - j + 1] = data[j + mid]; ?*~W
} BpL,<r,
int a = temp[l]; iw\RQ 0
int b = temp[r]; *7Ct#GC
for (i = l, j = r, k = l; k <= r; k++) { +-=w`
if (a < b) { X ?/C9
data[k] = temp[i++]; Fg)Iw<7_2
a = temp; =h?WT*
} else { U5]{`C0H?
data[k] = temp[j--]; Wc4F'}s
b = temp[j]; TC80nP
} )oJn@82C|
} K14e"w%6rs
} 84UH& b'n
+_tK \MN
/** QAigbSn]
* @param data CpuL[|51
* @param l #5xK&qA
* @param i %e2,p&0G
*/ %|$h<~
private void insertSort(int[] data, int start, int len) { @vdBA hXk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =7@N'xX
} *Ppb;
} sK8=PZ\
} 96UL](l(`
} >NWrT^rk
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堆排序： B#Cb`b"
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package org.rut.util.algorithm.support; LeDty_
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import org.rut.util.algorithm.SortUtil; a>x3UVf_
4}@J]_]Z
/** E|OB9BOS
* @author treeroot #nV F.
* @since 2006-2-2 m~cz
* @version 1.0 dWbSrl
*/ b(JQ>,hX
public class HeapSort implements SortUtil.Sort{ o!W 71
[IT*>;b+?
/* (non-Javadoc) @v^;,cu'8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F!DDlYUz.
*/ tHAr9
public void sort(int[] data) { Vmq:As^a
MaxHeap h=new MaxHeap(); Z<L|WRe
h.init(data); [=k$Q (.3
for(int i=0;i h.remove(); 7kX;|NA1
System.arraycopy(h.queue,1,data,0,data.length); ~9%L)nC2'
} :.8@ xVH
`@%hz%8Y
private static class MaxHeap{ LpCJfQ
I`k%/ei38
void init(int[] data){ oYOR%'0*m+
this.queue=new int[data.length+1]; ?=zF]J:G1w
for(int i=0;i queue[++size]=data; {m%]`0
fixUp(size); :;Z?2P5i
} Cngi5._Lb
} AA=zDB<N
8@b,>l$
private int size=0; t&5N{C:
yW3!V-iA
private int[] queue; Y:f"Zx
N_jpCCG~
public int get() { "[A]tklP
return queue[1]; :g&9v_}&K{
} MTI[Mez
vndD#/lXq
public void remove() { KHnq%#
SortUtil.swap(queue,1,size--); fkKk/M>1
fixDown(1); vs=8x\W
} K=Q<G:+&V
file://fixdown c+dmA(JC
private void fixDown(int k) { ?7;_3+T#
int j; LVHIQ9
while ((j = k << 1) <= size) { :8( "n1^
if (j < size %26amp;%26amp; queue[j] j++; hYvWD.c}
if (queue[k]>queue[j]) file://不用交换 {$ a $m
break; n1Ic[cM}
SortUtil.swap(queue,j,k); <GdQ""X
k = j; "}|&eBH^<
} T:<mme3v
} FdwlRuG
private void fixUp(int k) { G q&[T:
while (k > 1) { BYuoeN!
int j = k >> 1; {7F?30: ]
if (queue[j]>queue[k]) %[l#S*)~
break; 1uwzo9Yg
SortUtil.swap(queue,j,k); r &.gOC
k = j; qI=j>x
} +uqP:z
} S+*%u/;l
PI-o)U$Ehv
} B5R/GV
)@\Eibt2oH
} ^X\{MW'>4
Id}@
SortUtil： RCC~#bb
j&y>?Y&Sb
package org.rut.util.algorithm; c{(4s6D
h.t2;O,b
import org.rut.util.algorithm.support.BubbleSort; P`$Y73L
import org.rut.util.algorithm.support.HeapSort; `mp3ORR;$
import org.rut.util.algorithm.support.ImprovedMergeSort; uP.[,V0@^
import org.rut.util.algorithm.support.ImprovedQuickSort; :c/](M
import org.rut.util.algorithm.support.InsertSort; H_&z-g`
import org.rut.util.algorithm.support.MergeSort; 7dh--.i
import org.rut.util.algorithm.support.QuickSort; w~|z0;hC
import org.rut.util.algorithm.support.SelectionSort; vVfIe5+OP
import org.rut.util.algorithm.support.ShellSort; S(NUuu}S
\L]T|]}(
/** kN8?.V%Utw
* @author treeroot #U?=D/
* @since 2006-2-2 q% pjY
* @version 1.0 wM0P#+bA\
*/ )BX-Y@fpA
public class SortUtil { .!2Ac
public final static int INSERT = 1; 41s[p56+@
public final static int BUBBLE = 2; -Izc-W
public final static int SELECTION = 3; 2E/yZ ~2s
public final static int SHELL = 4; k<.VR"I p
public final static int QUICK = 5; yS"; q
public final static int IMPROVED_QUICK = 6; LQ'VhNU
public final static int MERGE = 7; =>u9k:('9
public final static int IMPROVED_MERGE = 8; 1 GB
public final static int HEAP = 9; D Kng.P
cuUlr
public static void sort(int[] data) { ?5Ub&{
sort(data, IMPROVED_QUICK); ?YA5g' l
} 'boAv%1_sa
private static String[] name={ 1v"r8=Wt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0Ik}\lcn
}; "PtOe[Xk
h_?#.z0ih;
private static Sort[] impl=new Sort[]{ nq3B(
new InsertSort(), r<XlIi
new BubbleSort(), -_xC,dwK
new SelectionSort(), JzZ9ua
new ShellSort(), |@lVFEl]
new QuickSort(), x}*Y =Xh
new ImprovedQuickSort(), ^{(i;IVG
new MergeSort(), @ZFU< e$!
new ImprovedMergeSort(), ckg8x&Z
new HeapSort() 8C4=f
}; U<Z\jT[
o7#Mr`6H
public static String toString(int algorithm){ 'h~I#S4!
return name[algorithm-1]; BH$+{rZ8t
} cc|"^-j-7
f8X/kz
public static void sort(int[] data, int algorithm) { 5q>u]n9]
impl[algorithm-1].sort(data); #&jr9RB
} #Ies yNKZ
DHO+JtO
public static interface Sort { {Vj25Gt
public void sort(int[] data); ?=lnYDj
} I-`qo7dQ_S
.7EZB
public static void swap(int[] data, int i, int j) { fqgm`4>
int temp = data; xw%'R-
data = data[j]; %=O$@.%Zc
data[j] = temp; dPfDPb
} [va7+=[1=
} hm5A@Z